Liebert NX
NXr
8VHU0DQXDO
30 to 200 kVA UPS cubicles
parallelable to 800kVA
Modular NXr UPS
30kVA ~ 200kVA (parallelable to 800kVA)
User Manual
Version
Revision date
BOM
V1.2 ENPAu
2011 0401 (ENPAu 2011 1108)
31012244
Emerson Network Power provides customers with technical support. Users may contact the nearest
Emerson local sales office or service center.
Copyright © 2010 by Emerson Network Power Co., Ltd.
All rights reserved. The contents in this document are subject to change without notice.
Emerson Network Power Co., Ltd.
Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China
Homepage: www.emersonnetworkpower.com.cn
E-mail: support@emersonnetwork.com.cn
Safety Precaution
This manual covers the installation and use of Emerson NXr UPS.
Please read this manual before installation.
The NXr UPS must be commissioned and maintained by the engineers designated by the manufacturer or its
agent. Failure to observe this could result in personnel safety risk, equipment malfunction and invalidation of
warranty.
The NXr UPS is only used for commercial or industrial purpose and cannot be used as life support equipment.
This is a C2 type UPS product. In a domestic environment, this product may cause radio frequency interference,
in which case, the user may be required to take additional measures.
Conformity and standards
This product complies with CE 2006/95/EC (low voltage safety) and 2004/108/EC (EMC), EMC standards of Australia and
New Zealand (C-Tick), and the following UPS product standards:
* IEC62040-1-1-General and safety requirements for use in operator access area
* IEC/EN62040-2 EMC requirements CLASS C2
* IEC62040-3 Performance requirements and test methods
For more details, refer toChapter 8 Product Specifications.
Continued compliance requires installation in accordance with these instructions and the use of manufacturer approved
accessories only.
Warning: high earth leakage current
Earth connection is critical before connecting the input supply (including both mains supply and battery).
Earth leakage current exceeds 3.5mA and is less than 1000 mA.
Transient and steady state earth leakage currents, which may occur when the equipment is started, should be taken into
account in the selection of instantaneous residual current circuit breakers (RCCBs or residual current detector (RCD
devices.
Note also that the earth leakage currents of the load will be carried by the RCCBs or RCDs.
The equipment must be earthed in accordance with the local electrical authority codes of practices.
Warning: backfeeding protection
This UPS is fitted with a voltage-free contact closure signal for use with an external automatic disconnect device (supplied
by others), to protect against backfeeding voltage into the incoming termninal through the static bypass circuit. If this signal
is not used by the installer, a label must be added at the external incoming bypass supply disconnect device to warn service
personnel that the circuit is connected to a UPS.
The text has the following meaning or is equivalent to: Isolate the UPS before working on this circuit.
User serviceable components
All the equipment maintenance and servicing procedures involving internal access need special tools and should be carried
out only by trained personnel. The components that can only be accessed by opening the protective cover with tools cannot
be maintained by the user.
This UPS fully complies with the general and safety requirements for use in operator access area. Dangerous voltages are
present within the UPS and battery enclosure but out of reach of non-service personnel. Contact of these voltages is
minimized, because live parts are housed behind protective covers that require a tool for their removal. No risk exists if you
operate the equipment in the normal manner, following the recommended operating procedures in this manual.
Battery voltage higher than 400Vdc
All the battery physical maintenance and servicing procedures need special tools or keys and should be carried out only by
trained personnel.
Take special care when working with the batteries associated with this UPS. When the batteries are connected together, the
battery terminal voltage exceeds 400vdc and is potentially leathal.
Battery manufacturers supply details of the necessary precautions to be observed in working on, or in the vicinity of, a large
bank of battery cells. These precautions should be followed implicitly at all times. Particular attention should be paid to the
recommendations concerning local environmental conditions and the provision of protective clothing, first aid and
fire-fighting facilities.
Contents
Chapter 1 Installation Of single UPS cubicle ....................................................................................................................... 1 1.1 Brief Introduction ................................................................................................................................................... 1 1.2 Initial Check .......................................................................................................................................................... 1 1.3 Location Selection................................................................................................................................................. 2 1.3.1 UPS Room................................................................................................................................................. 2 1.3.2 External Battery Room............................................................................................................................... 2 1.3.3 Storage ...................................................................................................................................................... 2 1.4 Positioning ............................................................................................................................................................ 3 1.4.1 System Cabinet ......................................................................................................................................... 3 1.4.2 Moving Cabinet .......................................................................................................................................... 3 1.4.3 Clearance .................................................................................................................................................. 3 1.4.4 Front Access.............................................................................................................................................. 3 1.4.5 Final Positioning And Fixing ...................................................................................................................... 3 1.4.6 Cable Entry ................................................................................................................................................ 5 1.5 External protective device ..................................................................................................................................... 5 1.5.1 Rectifier And Bypass Input ........................................................................................................................ 6 1.5.2 External Battery Circuit Breaker ................................................................................................................ 6 1.5.3 UPS Output ............................................................................................................................................... 6 1.6 Power Cables ....................................................................................................................................................... 6 1.6.1 Maximum Steady State AC And DC Currents Maximum steady state AC and DC currents ................... 6 1.6.2 Distance From Floor To Connection Point On The Equipment .................................................................. 7 1.6.3 Cable Connection ...................................................................................................................................... 7 1.7 Control Cables And Communication ................................................................................................................... 12 1.7.1 Input Dry Contact Port: Battery Environment (ventilation), Ground fault, Temperature ........................... 12 1.7.2 Battery Circuit-Breaker (BCB) Port .......................................................................................................... 13 1.7.3 Maintenance Switch And Output Switch State Port ................................................................................. 13 1.7.4 Backfeed protection Output Dry Contact Port .......................................................................................... 14 1.7.5 Remote Emergency Power Off (REPO) Input Port .................................................................................. 14 1.7.6 Relay and Network Interface Card ports, Service ports, .......................................................................... 15 Chapter 2 Battery .............................................................................................................................................................. 16 2.1 Brief Introduction ................................................................................................................................................. 16 2.2 Safety.................................................................................................................................................................. 17 2.3 Battery Power Cable ........................................................................................................................................... 18 2.3.1 Overview.................................................................................................................................................. 18 2.3.2 Battery Installation ................................................................................................................................... 18 2.3.3 Battery Connection .................................................................................................................................. 18 2.4 Battery Maintenance ........................................................................................................................................... 19 2.5 Battery Recycling ................................................................................................................................................ 20 2.6 Connection Of External Battery Circuit-Breaker (BCB ........................................................................................ 20 Chapter 3 Installation Of Multiple UPS cubicles ................................................................................................................ 22 3.1 Overview ............................................................................................................................................................. 22 3.2 1 + N Parallel System ......................................................................................................................................... 22 3.2.1 Cabinet Installation .................................................................................................................................. 23 3.2.2 External protective device........................................................................................................................ 24 3.2.3 Power Cable ............................................................................................................................................ 24 3.2.4 Auxiliary Control Wiring ........................................................................................................................... 25 3.2.5 Parallel Control Cables ............................................................................................................................ 25 3.3 Dual Bus System ................................................................................................................................................ 26 3.3.1 Cabinet Installation .................................................................................................................................. 26 3.3.2 External protective device........................................................................................................................ 26 3.3.3 Power Cable ............................................................................................................................................ 26 3.3.4 Control Cable ........................................................................................................................................... 26 Chapter 4 System Description........................................................................................................................................... 28 4.1 Brief Introduction ................................................................................................................................................. 28 4.1.1 Operating Theory ..................................................................................................................................... 28 4.1.2 Static (bypass) Transfer Switch ............................................................................................................... 28 4.2 1 + N Parallel System ......................................................................................................................................... 29 4.2.1 Parallel System Features......................................................................................................................... 29 4.2.2 Requirements For Paralleling Of UPS Modules ....................................................................................... 29 4.3 Operation Mode .................................................................................................................................................. 29 4.3.1 Normal Mode ........................................................................................................................................... 30 4.3.2 Battery Mode ........................................................................................................................................... 30 4.3.3 Automatic Restart Mode .......................................................................................................................... 30 4.3.4 Bypass Mode ........................................................................................................................................... 30 4.3.5 Maintenance Mode (Manual Bypass) ...................................................................................................... 30 4.3.6 Parallel Redundancy Mode (System Expansion) ..................................................................................... 30 4.4 Battery Management (Set During Commissioning) ............................................................................................. 30 4.4.1 Normal Function ...................................................................................................................................... 30 4.4.2 Advanced Function .................................................................................................................................. 31 4.5 Battery Protection (Set By Commissioning Engineer) ......................................................................................... 31 Chapter 5 Operator Control And Display Panel................................................................................................................. 32 5.1 Introduction ......................................................................................................................................................... 32 5.1.1 Indicators ................................................................................................................................................. 32 5.1.2 Audible Alarm (Buzzer) ............................................................................................................................ 33 5.1.3 Control Keys ............................................................................................................................................ 33 5.1.4 LCD And Menu Keys ............................................................................................................................... 33 5.2 LCD Screen Type ............................................................................................................................................... 34 5.2.1 Start Screen............................................................................................................................................. 34 5.2.2 Primary Screen ........................................................................................................................................ 34 5.2.3 Default Screen ......................................................................................................................................... 35 5.3 Selecting Language ............................................................................................................................................ 35 5.4 Changing The Current Date And Time................................................................................................................ 35 5.5 Control Password................................................................................................................................................ 35 5.6 Detailed Description Of Menu Items ................................................................................................................... 35 5.7 Prompt Window................................................................................................................................................... 37 5.8 Alarm List ............................................................................................................................................................ 38 Chapter 6 Operating Instructions ...................................................................................................................................... 41 6.1 Power Switches .................................................................................................................................................. 41 6.2 UPS Startup Procedures ..................................................................................................................................... 42 6.2.1 Procedures For Startup Into Normal Mode .............................................................................................. 43 6.2.2 Procedures For Startup In Battery Mode (Startup Without A.C. Input Supply) ........................................ 43 6.3 Procedures For Transfer Between Operation Modes.......................................................................................... 44 6.3.1 Transfer From Normal Mode To Battery Mode ........................................................................................ 44 6.3.2 Transfer From Normal Mode To Bypass Mode ........................................................................................ 44 6.3.3 Transfer From Bypass Mode To Normal Mode........................................................................................ 44 6.3.4 Transfer From Normal Mode To Maintenance Mode ............................................................................... 44 6.4 Procedures For Completely Powering Down The UPS ....................................................................................... 45 6.5 Procedures For Completely Powering Down The UPS While Maintaining he Power Supply To The Load ........ 45 6.6 Isolation Procedures (Of One UPS In A Parallel System) ................................................................................... 45 6.7 Insertion Procedures (Of One UPS In A Parallel System) .................................................................................. 46 6.8 Emergency Power Off (EPO) Procedures ........................................................................................................... 46 6.9 Automatic Restart ............................................................................................................................................... 46 6.10 UPS Reset Procedures ..................................................................................................................................... 47 Chapter 7 Service ............................................................................................................................................................. 48 7.1 Service Procedures Of Power Module And Bypass Module ............................................................................... 48 7.1.1 Notes ....................................................................................................................................................... 48 7.1.2 Service Procedures Of Power Module ..................................................................................................... 48 7.1.3 Service Procedures Of Bypass Module ................................................................................................... 48 7.2 Replacement Procedures Of Air Filter ................................................................................................................ 49 Chapter 8 Product Specification.. ...................................................................................................................................... 51 8.1 Conformity And Standards .................................................................................................................................. 51 8.2 Environmental Characteristics ............................................................................................................................ 51 8.3 Mechanical Characteristics ................................................................................................................................. 51 8.4 Electrical Characteristics (Input Rectifier) ........................................................................................................... 52 8.5 Electrical Characteristics (Intermediate DC Circuit) ............................................................................................ 52 8.6 Electrical Characteristics (Inverter Output) ......................................................................................................... 53 8.7 Electrical Characteristics (Bypass Input) ............................................................................................................. 53 8.8 Efficiency, Heat Losses And Air Exchange ......................................................................................................... 54 Appendix 1 Option List ...................................................................................................................................................... 55 Appendix 2 List Of Abbreviations ...................................................................................................................................... 56 Chapter 1 Installation Of UPS Module
1
Chapter 1 Installation Of single UPS cubicle
This chapter introduces the installation of Emerson NXr 30kVA ~ 200kVA UPS (hereinafter referred to as UPS)
module, including the initial check, location selection, positioning, external protective device and cable connection.
1.1 Brief Introduction
This chapter briefs the relevant requirements that must be considered in the location selection and cabling of the UPS
and relevant equipment.
Because each site has its particular characteristics, this chapter does not provide detailed installation steps, it only
acts as a guide for the general procedures and practices that should be observed by the installing engineer, so that
they can properly handle the specific situation of the site.
Warning: professional installation required
1. Do not apply electrical power to the UPS without permission of the commissioning engineer.
2. The UPS should be installed by a qualified engineer in accordance with the information contained in this manual. All the
equipment not referred to in this manual is shipped with details of its own mechanical and electrical installation information.
Note: 3-phase 5-wire input power required
The standard UPS can be connected to TN, TT and IT AC distribution systems (IEC60364-3) of 3-phase 5-wire (A, B, C, N, PE).
Warning: battery hazards
1. Take special care when working with the batteries associated with the UPS. When the battery is connected, the battery terminal
voltage exceeds 400Vdc and is potentially lethal.
2. Wear eye protection to prevent injury from accidental electrical arcs.
3. Remove rings, watches and all metal objects.
4. Use tools with insulated handles only.
5. Wear rubber gloves.
6. If a battery leaks electrolyte, or is otherwise physically damaged, it must be replaced, stored in a container resistant to sulfuric
acid and disposed of in accordance with local regulations.
7. If electrolyte comes into contact with the skin, the affected area should be washed immediately with water.
1.2 Initial Check
Check the following items prior to UPS installation:
1. Visually examine if there is any damage inside and outside the UPS and battery due to transportation. Report any
such damage to the shipper immediately.
2. Verify the UPS label and confirm the correctness of the UPS. The UPS label is attached on the back of the door.
The UPS model, capacity and main parameters are marked on the label.
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Chapter 1 Installation Of UPS Module
1.3 Location Selection
1.3.1 UPS Room
The UPS is designed for indoor installation. It should be installed in a clean environment with adequate ventilation to
keep the environmental parameters within the specified operating range (see Table 8-2). For example, the UPS
should not be installed in an environment outside the specified operating range, like in thruway tunnels or outdoor
places without air-conditioning.
The UPS uses forced cooling by internal fans. Cooling air enters the UPS through the ventilation grills at the front of
the cabinet and exhausted through the ventilation grills in the rear of the cabinet. Do not obstruct the ventilation holes.
If necessary, install a system of extractor fans to aid cooling-air flow to avoid room temperature buildup. An air filter
should be used when the UPS is to operate in a dirty environment.
Note
The UPS should be installed on a cement surface or other surface that is not combustible.
1.3.2 External Battery Room
Batteries generate some amount of hydrogen and oxygen at the end of charge, so the fresh air volume of the battery
installation environment must meet the EN50272-2001 requirements.
The ambient temperature of the battery must be stable. Ambient temperature is a major factor in determining the
battery capacity and life. The nominal operating temperature of the battery is 20°C. Operation above this temperature
will reduce the battery life, and operation below this temperature will reduce the battery capacity. If the average
operating temperature of the battery rises from 20ºC to 30ºC, the service life of the battery will be reduced by 50%. If
the operating temperature of the battery is above 40ºC, the battery service life will be decreased in exponent rate. In
a normal installation, the battery temperature is maintained between 15°C and 25°C. Keep batteries away from heat
sources and ventilation holes.
If external battery is used, a battery protective device (for example, fuse or circuit breaker) shall be installed. The
battery protective device shall be installed as close to the battery as possible, and the cabling distance between the
battery protective device and the battery shall be minimized.
1.3.3 Storage
Should the UPS not be installed immediately, it must be stored in a room for protection against excessive humidity
and heat sources (see Table 8-2). The battery needs to be stored in a dry and cool place with good ventilation. The
most suitable storage temperature ranges from 20ºC to 25ºC.
Warning
During storage, periodically charge the battery according to the battery manufacturer instructions. In the charge process,
temporarily connect the UPS to the mains and activate the battery for the time required for recharging the battery.
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1.4 Positioning
To prolong the service life, the place chosen should offer:
 convenient wiring
 space for easy operation on UPS
 sufficient air exchange to dispel heat produced by UPS
 protection against atmospheric agents
 protection against excessive humidity and heat sources
 protection against dust
 compliance with fire prevention requirements
 operating environment temperature between 20°C and 25°C (the typical temperature range for max. battery life)
The UPS is of steel frame structure wrapped by removable panels. The top and side panels are fixed by screws.
Opening the UPS door reveals the power terminals, auxiliary terminal block and power switch. The UPS has an
operator control and display panel located on its front door, which provides the basic operating status and alarm
information. The UPS provides air inlet in the front and air outlet at the back.
1.4.1 System Cabinet
Depending on the design requirement of each UPS system, a UPS system may include certain equipment cabinets,
such as UPS cabinet, external battery cabinet, external bypass cabinet, and so on. All the cabinets should be
installed side by side to achieve an aesthetic effect.
1.4.2 Moving Cabinet
Warning
1. The lifting equipment for moving the UPS cabinet shall have enough lifting capacity. For the UPS weight, refer to Table 8-3.
2. Ensure that adequate personnel and lifting aids are available when removing the shipping pallet.
Note
Take special care when moving the battery cabinet fitted with batteries, in which case, the moving distance shall be minimized.
The UPS can be moved by means of a fork lift or similar equipment.
1.4.3 Clearance
As the UPS has no ventilation grills at either side, no clearances are required for either side.
To enable routine tightening of the power terminations within the UPS, it is recommended that clearance around the
front of the equipment should be sufficient to enable free passage of personnel with the door fully open. Meanwhile,
maintain, for full 200kVA applications a rear clearance of at least 350mm to permit adequate circulation of air coming
out of the UPS, and advisably more than 500mm to facilitate maintenance.
1.4.4 Front Access
The component layout of the UPS supports front access and top access for servicing, diagnosing and repairing the
UPS, thus reducing the space requirement for side and rear access.
1.4.5 Final Positioning And Fixing
Figure 1-1 and Figure 1-2 provide the UPS installation dimensions. After final positioning, fix the UPS directly on the
installation surface through the anchor holes on the UPS base. If the UPS is mounted on raised floor, a suitable
pedestal should be designed, which should be able to bear the UPS weight. When designing the pedestal, refer to
the bottom view in Figure 1-1 and Figure 1-2.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 1 Installation Of UPS Module
843
843
600
1400
1396
350
586
Side view
80
Front view
1400
1397
645
800
794
100 145
102
476
A
Top view
445
Anchor hole
Bottom view
15
35
A amplified view
Figure 1-1
30kVA~160kVA UPS installation dimensions (unit: mm)
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 1 Installation Of UPS Module
5
825
843
843
600
600
1600
1598
1598
350
80
586
586
Front
view
前视图
Side
view
侧视图
1400
645
803
100 146
474
A
Anchor hole
Bottom view
15
顶视图
Top
view
445
35
A amplified view
Figure 1-2
200kVA UPS installation dimensions (unit: mm)
1.4.6 Cable Entry
The UPS uses top cable entry and bottom cable entry.
1.5 External protective device
External circuit breakers or other protective devices must be fitted at the input AC supply of the UPS. This section
provides a general guide for qualified installation engineers. The installation engineers should have the knowledge of
the local wiring regulations on the equipment to be installed.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 1 Installation Of UPS Module
1.5.1 Rectifier And Bypass Input
Over currents
Install suitable protective devices in the distribution of the incoming mains supply, considering the power cable
current-carrying capacity and overload capacity of the system (see Table 8-6). Generally, magnetic circuit breaker
with IEC60947-2 tripping curve C (normal) at 125% of the current listed in Table 1-1 is recommended.
Split bypass: In case a split bypass is used, separate protective devices should be installed for the rectifier input and
bypass input in the incoming mains distribution panel.
Note
1. The rectifier input and bypass input must use the same neutral line.
2. For IT power systems, four-pole protective devices must be used upstream of the input distribution panel and output distribution
panel, external to the UPS.
Earth leakage
The residual earth current introduced by the radio frequency interference (RFI) suppression filter inside the UPS is
greater than 3.5mA and less than 1000mA. It is recommended that the sensitivity of all differential devices be verified
upstream of the input distribution panel.
1.5.2 External Battery Circuit Breaker
The UPS and its associated battery are protected against the effect of overcurrents through a DC circuit breaker
provided by the external battery cabinet.
The rated voltage of the external battery overcurrent protective device is more than 500Vdc, and its DC breaking
current is more than 8kA.
1.5.3 UPS Output
The UPS output distribution shall be configured with a protective device. The protective device shall be different from
the input distribution protection switch and able to provide overload protection (refer to Table 8-6).
1.6 Power Cables
The cable design must comply with the instructions provided in this section, follow local wiring practices, take the
environmental conditions into consideration, and refer to IEC60950-1 Table 3B.
1.6.1 Maximum Steady State AC And DC Currents
UPS
rating
(kVA)
Maximum steady state AC and DC currents
Rated current (A)
current
1,2
Busbar stud size
2
Input mains
(at full
Output current at full
load
load with battery
recharging)
380V
400V
415V
380V
Battery
discharge
current at
EOD
400V 415V
Main input,
output, bypass
input cables
Bolt
Torque
(N.m)
M8
15
200
330
316
302
303
290
278
150, 160
280
265
255
225
215
205
120
224
212
204
180
172
164
420
90、100
168
159
153
135
129
123
315
60
112
106
102
90
86
82
210
40
75
71
68
60
57
55
140
30
56
53
51
45
43
41
105
M6
4.8
30-B
56
53
51
45
43
41
105
M6
4.8
Battery cables
Bolt
Torque (N.m)
630
525
Note:
1. Input mains current for common rectifier and bypass AC input.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
M8
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Chapter 1 Installation Of UPS Module
7
2. Non-linear loads (switch mode power supplies) affect the design of the output and bypass neutral cables. The current
circulating in the neutral cable may exceed that of the nominal phase current by up to 70%.
3. Values shown for 30 x 6-cell 12V blocks per battery string. Each string may contain from 30 to 40 x 6-cell 12V blocks. Inverse
proportional values apply with more blocks per battery string. E.g. The max discharge current from a 40 x 6-cell 12V battery applied
to a 30kVA NXr is 105A x (30/40) = 78A
1. Protective earth cable: Follow the most direct route possible to connect the earth cable to the cabinet. The earth
cable shall be sized in accordance with the AC supply fault rating, cable lengths and type of protection. E.g. typical
cross sectional area (CSA) is 70mm2 (150kVA) according to AS/IEC60950-1 Table 2D.
2. When sizing the battery cables, a maximum volt drop of 4Vdc is permissible at the current ratings given in Table
1-1. The load equipment is generally connected to a distribution board containing individually protected busbars
rather than connected directly to the UPS output. The output cables from paralleled units to the parallel distribution
bus should be of the same length to optimise the sharing of current. Do not form coils, so as to minimize the
formation of electromagnetic interference.
3. For terminal location, refer to Figure 1-4 ~ Figure 1-6.
Warning
Failure to follow adequate earthing procedures may result in electromagnetic interference or in hazards involving electric shock
and fire.
1.6.2 Distance From Floor To Connection Point On The Equipment
Table 1-1
Distance from floor to connection point on the equipmen
UPS connection point
Minimum distance (mm)
30kVA (NXr 30K-B)
30kVA (NXr 30K) ~ 160kVA
200kVA
Rectifier AC input supply
780
284
284
Bypass AC input supply
685
284
284
UPS AC output
530
369
251
Battery power
375
369
320
Auxiliary cable: to monitoring board (U2)
1104
1104
1304
1.6.3 Cable Connection
Important
The operations described in this section must be performed by authorised personnel. If you have any questions, please contact
the local customer service center of Emerson immediately.
Warning
1. Before cable connection, ensure that you are aware of the location and state of the breaker that connects the UPS input to the
mains distribution panel. Check that this breaker is off, and post any necessary warning sign to prevent inadvertent operation of
the breaker.
2. The power cables should be routed through cable tunnel or metallic cable trough to avoid being damaged under mechanical
stress and reduce electromagnetic interference to the environment.
Once the equipment has been finally positioned and secured, refer to Figure 1-3 to connect the power cables as
described in the following procedures:
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Chapter 1 Installation Of UPS Module
To user safety earth
PE
oA
oB
UPS
oC
UPS output
oN
mA
Power cable
mB
mC
Main input
mN
Bypass module
bA
bB
bC
Bypass input
bN
J7
3
Input
4
EXT
J9
1
2
3
4
External EPO J10
1
2
3
1
2
3
4
BFP_O
BFP_S
12V
EXT_Q3 BFP_C
IN_S
J5
EXT_OUT
BPS
GND
J6
EPO_NC
12V
12V
EPO_NO
1 2 4 3
Output
BAT+
N
BAT-
DRV
FB
OL
GND
4
ENV
BIG
Battery input
+12V
BAT_OUT
GND
BAT
1
2
J8
2 3 4
Figure 1-3
UPS electrical connection
1. Verify that the UPS equipment is isolated from its external power source and all the UPS power isolators are open.
Check that these supplies are electrically isolated and post any necessary warning signs to prevent their inadvertent
operation.
2. Open the UPS door and remove the protective cover at the lower part in the front to gain access to the power
terminals, as shown in Figure 1-4 to Figure 1-6.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 1 Installation Of UPS Module
Figure 1-4
30kVA (NXr 30K-B) UPS power terminals
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 1 Installation Of UPS Module
mA
mB
mC
mN
mN
BAT+
BAT N
BAT-
oA
PE
bA
bB
oB
bC
oN
Note:
1. Main input: mA, mB, mC, mN
2. Bypass input: bA, bB, bC, mN
3. UPS output: oA, oB, oC, oN
4. Battery input: BAT+, BAT-, BAT N
5. Earth: PE
Figure 1-5
30kVA (NXr 30K) ~ 160kVA UPS power terminals
mN
mA
mB
mC
+
N
-
oN
oA
oB
bA
bB
bC
oC
PE
Note:
1. Main input: mA, mB, mC, mN
2. Bypass input: bA, bB, bC, mN
3. UPS output: oA, oB, oC, oN
4. Battery input: + , - , N
5. Earth: PE
Figure 1-6
200kVA UPS power terminals
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 1 Installation Of UPS Module
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3. Connect the protective earth cable and all other necessary earth cables to the earth terminals (PE).
Note
The earth cables and neutral line connection must be in accordance with local and national codes of practice.
4. Identify and make power connections for the input cables according to one of the following two procedures,
depending on the type of installation.
Common input connections
1) In common bypass and rectifier input configuration, for 30kVA ~ 160kVA UPS, connect the AC input cables to the
main input terminals (mA-mB-mC-mN); for 200kVA UPS, connect the AC input cables to the bypass input terminals
(bA-bB-bC-mN). Refer to Table 1-1 for the torque. Ensure correct phase rotation.
Split bypass connections
2) If a split bypass configuration is used, connect the main input cables to the main input terminals (mA-mB-mC-mN),
and connect the bypass input cables to the bypass input terminals (bA-bB-bC-mN). Refer to Table 1-1 for the torque.
Ensure correct phase rotation.
Warning
For split bypass operation, ensure that the linking busbars between the bypass input and maiin input are removed. The main
input and bypass input must be referenced to the same neutral point.
System output connection
5. Connect the system output cables between the UPS output terminals (oA-oB-oC-oN) and the critical load. Refer to
Table 1-1 for the torque. Ensure correct phase rotation.
Warning
If the load equipment will not be ready to accept power on the arrival of the commissioning engineer then ensure that the system
output cables are safetly isolated at their ends.
Warning: hazardous battery terminal voltage 400Vdc
1. Ensure correct polarity of batter string end connections to the UPS terminals, that is, (+) to (+), (–) to (–) and (N) to (N). But do
not make these connections before authorized by the commissioning engineer.
2. Ensure correct polarity of battery string end connections to the battery circuit breaker (BCB) and from the BCB to the UPS
terminals, that is, (+) to (+) and (–) to (–), but disconnect one or more battery cell links in each tier. Do not reconnect these links
and do not close the BCB before authorized by the commissioning engineer.
6. For frequency converter applications ensure the bypass links are removed.
7. Replace the protective cover.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
12
Chapter 1 Installation Of UPS Module
1.7 Control Cables And Communication
As shown in Figure 1-7, the bypass module provides dry contact ports (J5 ~ J10), service and communication ports
(RS485 port, RS232 port and three Intellislot (Network Interface/Relay ports) on the front panel.
J8
J5
J2
J6
J9
J3
J4
1
J10 J7
2
RS485
Figure 1-7
RS232
Intellislot 1
Intellislot 3
Intellislot 2
Dry contact ports and communication ports
The UPS accepts external signalling from voltage-free (dry) contacts connected to push-in input dry contact terminal.
Subject to prior software programming, the signalling is accepted by the UPS when relevant terminals and the +12V
terminals are shorted. All control cables must be routed separately from the power cables and parallel cables,
double-insulated and of a typical 0.5mm2 to 1.5mm2 CSA for maximum runs between 20m and 30m respectively.
1.7.1 Input Dry Contact Port: Battery Environment (ventilation), Ground fault, Temperature
The input dry contact ports J7 and J8 provide environmental and battery ground and temperature fault contacts. The
ports are shown in Figure 1-8 and described in Table 1-2.
12V
Table 1-2
BAT_IN
+12V
BAT_OUT
GND
BtG
Figure 1-8
ENV
J8
12V
J7
Input dry contact ports J7 and J8
Description of input dry contact ports J7 and J8
Position
Name
J7.1
ENV*
J7.2
BtG
J74
+12V
J8.1
BAT_IN
J8.2
+12V
J8.3
BAT_OUT
J8.4
GND
Description
Battery room environment detection (normally closed)
Battery ground fault
+12V power
Internal battery temperature detection
+12V power
External battery temperature detection
Power ground
Note*: Activating this feature turns off the battery charger
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 1 Installation Of UPS Module
1.7.2 Battery Circuit-Breaker (BCB) Port
J6 is the BCB port. The port is shown in Figure 1-9 and described in Table 1-3.
12V
12V
12V
Figure 1-9
Table 1-3
Position
Name
J6.1
DRV
J6.2
FB
J6.3
GND
J6.4
OL
DRV
FB
OL
GND
J6
BCB port
BCB port description
Description
BCB driver signal –
BCB aux contact
for BCB UV coil when used
closed to J6.3 when BCB is open
Power ground
BCB on line – enables J6.1 and J6.2 (when J6.4 is closed to J6.3)
The connection between the BCB port and BCB is shown in Figure 1-10.
OL
GND
FB
DRV
J10
J6
Aux-N.O.
Aux_N.O.
Aux_N.O.
Aux-N.O.
Aux contact is open
when BCB is closed
BCB
BCB
电池开关
Figure 1-10
Connection between BCB port and BCB
1.7.3 Maintenance Switch And Output Switch State Port
J9 is the maintenance switch and output switch state port. The port is shown in Figure 1-11 and described in Table
1-4.
Figure 1-11
CAB-S
EXT_Q3
CAB-S
IN_S
EXT_OUT
EXT-S
GND
J9
Maintenance switch and output switch state port
Table 1-4 Description of maintenance switch and output switch state port
Position
Name
Description
J9.1
EXT_Q3
External maintenance bypass (EBP) switch – Aux Contact closed to J9.4 when
EBP is open.
J9.2
IN_S
J9.3
EXT_OUT
J9.4
GND
J9.2 shorted to J9.4 when Internal maintenance switch is closed
External output isolator (EOI) Aux Contact closed to J9.4 when EOI is closed.
Power ground
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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14
Chapter 1 Installation Of UPS Module
1.7.4 Backfeed protection Output Dry Contact Port
J5 is the output dry contact port, providing two relay output dry contact signals. The port is shown in Figure 1-12 and
described in Table 1-5. The shunt trip coil of the external circuit breaker can be driven directly through this dry
contact rated for 24Vdc/5A.
Figure 1-12
Table 1-5
Position
BFP_O
BFP_S
BFP_C
J5
Output dry contact port
Description of output dry contact port
Name
Description
J5.2
BFP_O
Bypass feedback protection relay (normally open), closed when bypass
silicon-controlled rectifier (SCR) is shorted
J5.3
BFP_S
Bypass feedback protection relay center
J5.4
BFP_C
Bypass feedback protection relay (normally closed), open when bypass SCR is
shorted
1.7.5 Remote Emergency Power Off (REPO) Input Port
The UPS has an EPO function that operates by a button on the operator control and display panel of the UPS or by a
remote contact provided by the user. The EPO switch is under a hinged, plastic shield.
J10 is the remote EPO input port. The port is shown in Figure 1-13 and described in Table 1-6.
+12V
Figure 1-13
Table 1-6
EPO_NC
+12V
+12V
EPO_NO
J10
Remote EPO input port
Description of remote EPO input port
Position
Name
Description
J10.1
EPO_NC
EPO activate when J10.1 and J10.2 are open
J10.2
+12V
J10.3
+12V
J10.4
EPO_NO
EPO activate when J10.1 and J10.4 are closed
Notes
1.
2.
3.
4.
The UPS EPO action disables the UPS a.c. output by shuting down the rectifiers, inverters and static bypass.
The UPS EPO action does not disconnect any input power supply. To disconnect all power from the UPS, open the
upstream input breaker(s) and the battery breaker when EPO is activated.
Pins 1 and 2 of J10 are supplied factory-shorted.
If the UPS EPO function is not used, pins 1 and 2 of J10 must remain shorted and pins 3 and 4 of J10 must remain
open .
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 1 Installation Of UPS Module
15
1.7.6 Relay and Network Interface Card ports, Service ports,
Optional Intellislot cards
a) with Global Velocity Protocol (On UPS display, select Protocol Velocity in “Settings”)
Relay Card p/n IS-Relay
SNMP/WebBrowser Card
ModBus Card p/n IS-485L
(preferred location: port 1)
p/n IS-WEBL (preferred loc: port 2)
(preferred location: port 3)
b) with Asia-Pacific YDN23 Protocol
(in use prior to 2012 - On UPS display, select Protocol YDN23 in “Settings”)
Relay Card p/n 02351874
SNMP/Web SIC (Site Interface Card)
ModBus Card p/n 02354066
(preferred location: port 1)
p/n 02351817 2, (preferred loc: port 2)
(preferred location: port 3)
For details, refer to the user manuals of the each specific network interface card.
Service ports
J2 and J3: Parallel connection ports - used for control of two or more NXr UPS cabinets operating in
parallel.
J4: Load Bus Synch (LBS) interface - used to synchronize the outputs of two NXr UPS systems operating in
dual bus mode.
RS232 / RS485: maintenance ports - used for programming, commissioning and investigation by service
engineers.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 2 Battery
Chapter 2 Battery
This chapter introduces the relevant information of the battery, including the brief introduction, battery safety, battery
power cables, battery maintenance and recycling, reference current and connection of external BCB.
2.1 Brief Introduction
The UPS battery string consists of battery cells (or blocks) connected in series to provide a d.c. input voltage for the
UPS inverter to operate. The required battery backup time (that is, the time during which the battery can maintain
supply to the load in the event of a mains failure) is subject to the ampere-hour capacity of the battery. To achieve the
capacity required, subject to recommendation from the battery manufacturer, several battery strings may be
connected in parallel. Batteries of different brand, model and age should nottbe used together.
Except for the NXr 30K-B model that contains internal batteries, all UPS batteries are located external to the UPS
cabinet and is normally housed in a battery cabinet or located on stands/racks.
The NXr 30K-B UPS provides a battery compartment to accommodate internal batteries. Up to 40 x 24Ah/12V battery
blocks can be accommodated.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 2 Battery
17
2.2 Safety
Take special care when working with the batteries associated with the UPS. When all the cells are connected together,
the battery string voltage can be up to 576Vdc and is potentially lethal. Please follow the precautions for high voltage
operation. Only qualified personnel are allowed to install and maintain the battery. To ensure the safety, the external
batteries shall be installed inside a key-lockable cabinet or in a purpose-designed, dedicated battery room, so that
they are segregated from all but qualified maintenance personnel.
During battery maintenance, pay attention to the following items:
 Place the maintenance switch in the ON position
 The battery cell number setting in the background software must be consistent with the actual battery cell
number
Note
Full safety instructions concerning the use and maintenance of UPS batteries are provided in the appropriate battery
manufacturers manuals. The battery safety inforamtion contained in this section relates to key considerations that must be taken
into account during the installation design process and might affect the design outcome depending on localised conditions.
Warning: hazardous battery voltage present behind covers
1. No user-serviceable parts are located behind covers that require a tool for their removal. Only qualified service personnel are
authorised to remove such covers.
2. Before operating the copper bars connected with the external battery, please disenergize the copper bars.
3. Observe the following safety precautions when working on the batteries:
1) The battery shall be firmly and reliably connected. After the connection is completed, all connections between the terminals and
the batteries shall be calibrated. The requirements on torque specified in the instructions or user manual provided by the battery
manufacturer shall be satisfied. All connections between the terminals and the batteries shall be inspected and tightened at least
once a year. Failure to observe this may cause fire!
2) Inspect the battery appearance before accepting and using the battery. If there exist any package damage, dirty battery
terminal, terminal erosion, rust, or enclosure crack, deformation or electrolyte leakage, replace it with new product. Otherwise,
battery capacity reduction, electrolyte leakage or fire may be caused.
3) The battery is very heavy. Please use proper method to move and hoist the battery, so as to prevent any damage to human
being or the battery terminals. Severe damage to the battery may cause fire.
4) The battery terminals shall not be subject to any force, such as the pulling force or twisting force of the cable. Otherwise, the
internal connection of the battery may be damaged, and severe damage may cause fire.
5) The battery shall be installed and stored in a clean, cool and dry environment. Do not install the battery in a sealed battery
chamber or a sealed room. The battery room ventilation shall at least meet the requirement of EN50272-2001. Otherwise, battery
bulging, fire or even personal may be caused.
6) The battery shall be kept away from heat sources like transformers, or fire sources. Do not burn the battery or the battery in fire,
otherwise, electrolyte leakage, battery bulge, fire or explosion may be caused.
7) Do not directly connect any conductor between the positive and negative terminals of the battery. Remove finger rings,
watches, necklaces, bracelets and other metal objects before operating the battery, and ensure that the tools (for example,
wrench) are wrapped with insulating material. Otherwise, battery burning, explosion, human death or injury may be caused.
8) Do not disassemble, modify or damage the battery. Otherwise, battery short circuit, electrolyte leakage or even personal may
be caused.
9) Clean the battery enclosure with wringed wet cloth. To avoid any static or arcing, do not use dry cloth or duster to clean the
battery. Do not use the organic solvent, such as thinner, gasoline, volatile oil, to clean the battery. Otherwise, the battery enclosure
may be cracked. In worst case, fire may be caused.
10) The battery contains diluted sulfuric acid. In normal use, the diluted sulfuric acid is absorbed to the baffle plate and polar plate
of the battery. However, if the battery is damaged, the acid may leak from the battery. Therefore, use personal protective
equipment, such as, goggles, rubber gloves and apron, when operating the battery. Otherwise, if the diluted sulfuric acid enters
the eyes, blindness may be caused; if it contacts the skin, the skin may be burnt.
11) The battery may have short circuit, electrolyte dry-up or positive-pole plate erosion at the end of its life. If it is still used in this
state, the battery thermorunaway, bulging or electrolyte leakage may occur. Please replace the battery before it enters this state.
12) Before connecting or disconnecting the battery connection cables, please cut off the charging power.
13) Check if the battery has been unexpectedly earthed. If yes, remove the earth power. Contact with any part of the earthed
battery may cause electric shock.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 2 Battery
2.3 Battery Power Cable
2.3.1 Overview
Please install and connect the batteries according to the following description and graphic presentation.
2.3.2 Battery Installation
1. Before installation, check the battery appearance to ensure that there is no damage, inspect and count the
accessories, and carefully read this manual and the user manual or installation instruction provided by the battery
manufacturer.
2. There shall be a clearance of 10mm between the vertical sides of the batteries for the smooth flow of the air
around the batteries.
3. Certain clearance shall be maintained between the battery top and the underside of the layer above it to facilitate
battery monitoring and maintenance.
4. The batteries shall be installed from the bottom layer upwards to avoid high gravity center. The battery shall be
properly installed and protected from vibration or shock.
5. Measure the battery voltage, and calibrate the battery voltage after UPS startup.
2.3.3 Battery Connection
1. When the battery cabinet is installed on a raised floor, the battery power cables and optional BCB control cables
can enter the UPS cabinet through the cabinet bottom. If the UPS and battery cabinet are installed side by side on a
solid floor, these cables can be led into the UPS cabinet through the cable entry holes on the lower part of the battery
cabinet.
2. When multiple battery strings are used, they shall be connected in series and then in parallel. Before applying load
and power-up, be sure to measure the total voltage of the battery strings and make sure that it is correct. The
negative and positive terminals of the battery must be connected to the corresponding negative and positive battery
terminals of the UPS according to the labels on the battery and UPS. Reverse battery connection may cause
explosion, fire, battery damage, UPS damage, and personal injury.
3. After connecting the battery cables, install an insulating shroud for each terminal.
4. When connecting the cables between the battery terminals and the BCB, connect from the BCB side first.
5. The bending radius of the cable shall be larger than 10D, where D is the outer diameter of the cable.
6. After cable connection, it is prohibited to pull the battery cables or the cable terminals.
7. Do not cross the battery cables during connection, and do not tie the battery cables together.
8. Refer to Figure 2-1 and Figure 2-2 for the battery cable connection.
9. For NXr 30K-B UPS, it is required to install the factory supplied separators between the two rows of batteries on
each layer of the battery compartment, as shown in Figure 2-2.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 2 Battery
Battery
Battery
compartment
Battery
46.7
Battery
46.7
Battery
384
126.5
External battery cable connection
40
Figure 2-1
Lead out the battery neutral
cable from here on the third layer
Red Red
Black Black
Battery Battery
Blue Blue
Battery
46.7
Battery Battery
Battery Battery
Battery Battery
46.7
Battery
19
Separator
Battery
Figure 2-2
Internal battery cable connection (NXr 30K-B)
2.4 Battery Maintenance
The battery supplied by Emerson complies with the safety requirements of IEC 62040-1:2008. For the battery
maintenance and maintenance precautions, refer to the relevant manual provided by the battery manufacturer and
observe applicable local regulation e.g. AS2676:1993, IEEE-Std-1188-2005.
Note
1. Periodically check the screws of the battery terminals for loose connection. If there is any loose screw, tighten it immediately.
2. Check that all safety devices are present and that their functions are normal. Check that the battery management parameters
are set correctly.
3. Measure and record the air temperature inside the battery room.
4. Check the battery terminals for damage and heating. Check the battery enclosure and terminal covers for damage.
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20
Chapter 2 Battery
2.5 Battery Recycling
If the battery leaks electrolyte, or is otherwise physically damaged, it should be placed in a container resistant to
sulfuric acid and disposed of in accordance with local regulations.
Disused lead-acid storage battery belongs to dangerous waste, and it is a key item for disused battery pollution
control. The storage, transportation, use and disposal of the battery shall comply with the national and local laws and
regulations on dangerous waste and disused battery pollution prevention and other standards.
According to the relevant national regulations, the disused lead-acid storage battery must be recycled and shall not
be disposed of with other methods. Random discard or any other improper disposal of the disused lead-acid storage
battery may cause severe environment pollution and the relevant person will be investigated of corresponding legal
responsibilities.
As a lead-acid storage battery supplier, Emerson has built a perfect service network and disused battery recycling
system to help the customer legally and properly dispose of the lead-acid storage battery. For detailed information
about the disused battery recycling system of Emerson, please consult the local customer service center or sales
office of Emerson. If the customer refuses to accept this special note or does not use the disused battery recycling
system of Emerson. Emerson will not undertake any environment responsibility caused by the improper disposal of
the disused battery products.
2.6 Connection Of External Battery Circuit-Breaker (BCB
Table 2-1 provides recommended BCB rated current and minimum connection cable Cross Sectional Area (CSA).
Table 2-7
Reference table for selection of BCB rated current and connection cable CSA (minimum recommended)
Note: the minimum CSA is adequate for batteries located up to 5 meters from the UPS. For longer cable runs, the CSA shall be increased so
that the voltage drop remains less than 1% in order not to affect the battery run time significantly.
Item
30-cell
battery
32-cell
battery
34-cell
battery
36-cell
battery
38-cell
battery
40-cell
battery
Maximum battery discharge
current at full load
Reference rated current of BCB
Connection cable CSA
Maximum battery discharge
current at full load
Reference rated current of BCB
Connection cable CSA
Maximum battery discharge
current at full load
Reference rated current of BCB
Connection cable CSA
Maximum battery discharge
current at full load
Reference rated current of BCB
Connection cable CSA
Maximum battery discharge
current at full load
Reference rated current of BCB
Connection cable CSA
Maximum battery discharge
current at full load
Reference rated current of BCB
Connection cable CSA
Unit
UPS rating (kVA)
90, 100
120
30
40
60
150, 160
200
A
105
140
210
315
420
525
630
A
mm2
A
150
35
100
175
50
133
250
70
200
350
120
300
450
150
400
550
185
500
700
240
590
A
mm2
A
150
35
94
150
50
125
250
70
186
350
120
282
450
150
376
550
185
470
630
240
556
A
mm2
A
100
35
88
150
50
118
200
70
176
300
95
264
400
120
352
500
185
440
630
200
525
A
mm2
A
100
25
84
125
35
112
200
50
168
320
95
252
400
120
336
500
150
420
550
200
498
A
mm2
A
100
25
80
125
35
106
200
50
160
260
95
240
350
120
320
450
150
400
550
200
473
A
mm2
100
16
125
25
200
35
250
70
320
95
400
120
500
180
Note:
-It is recommended to use a DC moulded-case circuit breaker (MCCB) appropriately rated to open the kA fault current of the
battery at the nominal battery voltage. Applicable connections between the battery, BCB and UPS are shown in Figure 2-3, 2-4
and 2-5.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 2 Battery
+
NN
NN
-
-
N
N
UPS
UPS
Connections between battery, 4-pole BCB and UPS (4 wires at battery side)
N
N
Figure 2-4
UPS
UPS
+
NN
Figure 2-3
21
Connections between battery, 3-pole BCB and UPS (3 wires at battery side,
+
NN
N
N
UPS
UPS
+
Figure 2-5
Connections between battery, 4-pole BCB and UPS (3 wire at battery side
Figure 2-6 below shows connections to be carried out when using the UV trip controlled BCB box (containing a BCB
and a BCB control board) made by Emerson Network Power.
Temp sensor NC
+
12V
N
OUT
GND
TPM2
W3
BCB
UPS
Battery
+
UV
Auxiliary
contactor
Bypass module
J6
J8
220VDC
X100
OUT-P
OUT-N
AUX1
AUX2
X103
X104
X105
X106
BCB control board
UHW241C2
X101
X108
W2
W3
+12V
BAT -T
GND
+12V
BAT-T
GND2
OL
USE
FB
DRV
DRV
GND1
AUX
GND
Figure 2-6
Connections between UPS, BCB and BCB control board (option)
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
X102
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Chapter 3 Installation Of Parallel System
Chapter 3 Installation Of Multiple UPS cubicles
This chapter details the installation and wiring of a system containing more than one UPS cubicles installed in either
parallel and / or dual bus configuration.
3.1 Overview
Up to four UPS units can be connected in parallel to form a parallel system. Further, single or parallel configurations
can form systems with independent output buses (“dual bus systems”). The parallel and dual bus system installation
shall be carried out according to the installation procedures contained in chapter 1 for the single UPS cubicle and to
the applicable requirements of this chapter.
In addition to the Emergency Power Off (EPO switch provided on the operator control and display panel of each UPS
module for controlling the EPO of each module respectively, the parallel system also provides remote EPO function
for controlling all UPS modules to shut down simultaneously from a remote terminal, as shown in Figure 3-1.
Note
1. The remote EPO switch must provide dry contact signal, which is normally open or closed.
2. The open circuit voltage provided is 5Vdc, <20mA.
3. The external EPO device can be composed of another control system which can disconnect the UPS mains supply or the
bypass input.
4. Pins 1 and 2 of the normally closed EPO-J10 port on the bypass module have been linked in factory.
UPS 1
J10: 3
J10: 4
Bypass module
UPS 2
J10: 3
J10: 4
J10: 3
J10: 4
Bypass module
Bypass module
UPS 1
Figure 3-1
EPO circuit diagram (single and parallel UPS)
3.2 1 + N Parallel System
The basic installation steps of parallel system are the same as those of the single UPS cubicle. The following sections
describe the differences between the parallel system installation and single UPS installation.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 3 Installation Of Parallel System
23
3.2.1 Cabinet Installation
Position the UPS cubicles side by side and make connection as shown in Figure 3-2. The output distribution
consisting of external UPS output switches and maintenance bypass must be installed, as shown in Figure 3-2, to
facilitate maintenance and system testing.
Figure 3-2
Typical “1+N” system schematic diagram (with common input, separate battery and output/bypass distribution cabinet)
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 3 Installation Of Parallel System
Qin UPS 1
Qin UPS 2
Qin Ext
Byp
Qin UPS 3
Supplied by others
Mains input
L1, L2, L3, N
L1, L2, L3, N
Bypass input L1, L2, L3
L1, L2, L3, N
Bypass input Mains input L1,
L1, L2, L3, N L2, L3, N
Bypass input Mains input L1,
L1, L2, L3, N L2, L3, N
Rectifier
Rectifier
Rectifier
STS
STS
STS
Inverter
Inverter
Inverter
UPS 1 output
L1, L2, L3, N UPS 2 output
Qout UPS 2
Qout UPS 1
L1, L2, L3, N
UPS 3 output
Qout UPS 3
Qout Byp
Qout of all UPSs
Figure 3-3
Output distribution
1 + N UPS system with external maintenance switch
Note
For 1+N installations an external bypass rated for the total system load must be installed and the UPS internal maintenance
bypass must be locked off to prevent operation.
1.
For parallel systems designed for redundancy with 3 or more UPSs, it is recommended to install bypass load
sharing inductors to optimize current sharing during static bypass operation.
2.
For parallel systems designed for capacity, with 2 or more UPSs, it is recommended to install bypass load
sharing inductors to optimize current sharing during static bypass operation.
3.2.2 External protective device
Refer to Chapter 1 Installation Of single UPS cubicle .
3.2.3 Power Cable
The wiring of the power cable is similar to that of UPS module. The bypass and main input supplies must use the
same neutral line input terminal. If the input has a current leakage protective device, the current leakage protective
device must be fitted upstream of the common neutral sinking point. Refer to Chapter 1 Installation Of single UPS
cubicle .
Note
The length and specification of power cables including the bypass input cables and UPS output cables should be the same. This
facilitates load sharing in bypass mode.
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Chapter 3 Installation Of Parallel System
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3.2.4 Auxiliary Control Wiring
Auxiliary wiring must be installed as shown in Figure 3-4 to protect the system and enable a single UPS to be isolated
and tested during service. Refer to 1.7.3 Maintenance Switch And Output Switch State Port for auxiliary contact
details.
Input distribution
UPS 1
J9
UPS 2
J9
1 4 3
UPS 3
J9
1 4 3
1 4 3
Q2Ext
Q2Ext
Q1Ext
QUPS
QByp
Distribution panel
To load
Figure 3-4
Auxiliary control wiring
3.2.5 Parallel Control Cables
Shielded and double-insulated parallel control cables available in lengths 5m, 10m and 15m must be interconnected
in a ring configuration between the UPS modules, as shown in Figure 3-5. The parallel ports J2 and J3 are provided
on the front panel of the bypass module, as shown in Figure 3-6. The ring connection ensures the reliability of the
control of the parallel system. Be sure to verify the reliable cable connection before starting up the system.
UPS 1
UPS 2
UPS 3
J2
J2
J2
J2
J3
J3
J3
J3
Figure 3-5
Connection of parallel control cables of 1+N parallel system
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
UPS 4
26
Chapter 3 Installation Of Parallel System
J2
J3
J4
Figure 3-6
Locations of ports J2, J3 and J4 on bypass module
3.3 Dual Bus System
3.3.1 Cabinet Installation
A dual bus system consists of two independent UPS systems, each containing one or more (maximally 4) parallel
UPS modules, as shown in Figure 3-7. The dual bus system has high reliability and is suitable for load with multiple
input terminals. For single-input load, an optional static transfer switch can be fitted to start the load bus synchronizer
(LBS supplied in standard configuration.
Bypass
Main input
UPS 1
Bypass
UPS4 Main input
Parallel
control
cable
Main input
LBS
UPS 1
UPS4 Main input
Parallel
control
cable
STS
To load
Figure 3-7
Typical dual bus system (with static transfer switch and LBS)
The dual bus system uses the LBS to keep the output of the two independent UPS systems (or parallel systems) in
synchronization. One system is designated as the master, the other is designated as the slave. The operation modes
of the parallel system comprise master and/or slave operation in normal or bypass mode.
Place the UPS modules side by side and interconnect the UPS modules according to the following instructions.
3.3.2 External protective device
Refer to Chapter 1 Installation Of single UPS cubicle .
3.3.3 Power Cable
The wiring of power cables is similar to that of single module system. The bypass and the main input sources must be
referenced to the same neutral potential and input earth leakage monitoring devices, if installed, must be located
upstream of the common neutral sinking point. Refer to Chapter 1 Installation Of single UPS cubicle .
3.3.4 Control Cable
For NXr-to-NXr dual bus system, connect the optional LBS cables between the LBS ports (J4) of the two parallel
systems, as shown in Figure 3-8. The LBS port (J4) is provided on the front panel of the bypass module, as shown in
Figure 3-6.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 3 Installation Of Parallel System
UPS 1
UPS 2
Bypass module
UPS 3
Bypass module
UPS 4
Bypass module
Bypass module
J2
J2
J2
J2
J3
J3
J3
J3
J4
J4
J4
J4
LBS cable
LBS cable
Figure 3-8
Connection of typical dual bus system
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
27
28
Chapter 4 Operation
Chapter 4 System Description
This chapter introduces the information related to UPS operation, including the brief introduction, 1+N parallel system,
operation mode, battery management and battery protection.
Warning: hazardous mains and battery voltage present behind covers
No user-serviceable parts are located behind covers that require a tool for their removal. Only qualified service personnel are
authorised to remove such covers.
4.1 Brief Introduction
The UPS provides continuous, high-quality AC power to your critical equipment, such as telecommunications and
data processing equipment. The UPS supplies power that is free of the disturbances and variations in voltage and
frequency common to mains power, which is subject to brownouts, blackouts, surges and sags.
The UPS uses the latest high frequency, double-conversion pulse width modulation (PWM technology and digital
signal processing (DSP technology to enhance its reliability and increase the ease of use.
4.1.1 Operating Theory
As shown in Figure 4-1, the AC mains source is converted by the rectifier into DC power. The inverter converts that
DC power from the rectifier or the DC power from the battery into AC power, and provides the AC power to the load.
The battery supplies the load through the inverter in the event of a mains failure. The mains source can also supply
the load through the static bypass.
If UPS maintenance or repair is necessary, the load can be transferred without power interruption to the maintenance
bypass.
Maintenance switch
Maintenance bypass
STS
Bypass input
Rectifier
Inverter
UPS output
Mains input
Charger
Battery
Figure 4-1
Operating theory of UPS module system
4.1.2 Static (bypass) Transfer Switch
The circuit block labeled STS (static transfer switch) in Figure 4-1 contains an electronically controlled switching
circuit that enables the load to be connected to either the inverter output or to the bypass power source through the
static bypass line. During normal system operation, the load is connected to the inverter; but in the event of a UPS
overload or inverter fault, the load is automatically transferred to the static bypass line.
During normal operating conditions, the inverter output and bypass supply must be fully synchronized so as to
achieve a clean (no-break) load transfer between the inverter output and static bypass line. The synchronization
between the inverter output and static bypass is achieved through the inverter control electronics, which make the
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 4 Operation
29
inverter frequency track that of the static bypass supply, provided that the bypass remains within an acceptable
frequency window.
A manually-controlled maintenance bypass supply is incorporated into the UPS design. It enables the critical load to
be powered from the maintenance bypass supply while the UPS is shut down for routine maintenance and repair.
Note
When the UPS is operating in bypass mode or on maintenance bypass, the connected equipment is not protected from power
failures, surges, or sags.
4.2 1 + N Parallel System
Up to four UPS modules can be parallel-connected to form a 1 + N system to increase the system capacity or
reliability, or both. The load is equally shared between the paralleled UPSs.
4.2.1 Parallel System Features
1. The hardware and software of parallel system are completely the same as those of single UPS module. The
parallel configuration is achieved through settings in configuration software. The parameter settings of each UPS
module in parallel system should be the same.
2. Parallel control cables are connected in a ring, providing both system reliability and redundancy. Dual bus control
cables are connected between any two UPS modules of each bus. The intelligent parallel logic provides the user with
maximum flexibility. For example, shutting down or starting up UPS modules in a parallel system can be done in any
sequence. Transfers between normal and bypass modes of operation are synchronised and self–recoverable, for
example, following overloads and their clearance.
3. The total load of the parallel system can be queried from each UPS module’s LCD.
4.2.2 Requirements For Paralleling Of UPS Modules
A group of paralleled modules behave as if it were one large UPS with the advantage of presenting higher reliability.
To ensure that all modules are equally utilised and to comply with relevant wiring rules, the following requirements
apply:
1. All UPS modules must be of the same rating and must be connected to the same bypass source.
2. The bypass and main input sources must be referenced to the same neutral potential.
3. Any residual current detector (RCD, if installed, must be of an appropriate setting and located upstream of the
common neutral bonding point. Alternatively, the device must monitor the protective earth current of the system. Refer
to Warning: high earth leakage current before Contents.
4. The outputs of all UPS modules must be connected to a common output bus.
Note
Optional isolation transformers are available for applications where sources do not share the same neutral reference or where the
neutral is not available.
4.3 Operation Mode
The UPS is an on-line, double-conversion, reverse-transfer UPS that permits operation in these modes:
 Normal mode
 Battery mode (“stored energy mode”)
 Automatic restart mode
 Bypass mode
 Maintenance mode (manual bypass)
 Parallel redundancy mode
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Chapter 4 Operation
4.3.1 Normal Mode
The UPS rectifier derives power from the AC mains input source and supplies DC power to the inverter, which
continuously supplies the AC load to the load. Simultaneously, the charger, which derives power from the rectifier,
float or boost charges the associated backup battery of the UPS.
4.3.2 Battery Mode
The UPS is operating in battery mode when the battery is supplying backup power to the load through the inverter.
Upon mains failure, the UPS automatically transfers to battery mode without power interruption to the load. Upon
restoration of the AC mains, the UPS automatically transfers back to normal mode without the necessity of user
intervention, without power interruption to the load.
Note
Battery start function is available for switching the UPS on into battery (charged) mode directly upon mains failure. Thus, the
battery power can be used independently to increase the UPS utility.
4.3.3 Automatic Restart Mode
The battery becomes exhausted following an extended AC mains failure. The inverters shut down when the battery
reaches the EOD voltage. The UPS can be programmed to automatic restart after EOD after a set variable delay time.
This mode and any delay time are programmed by the commissioning engineer.
4.3.4 Bypass Mode
During normal mode operation, if the inverter fails, is overloaded or turned off, the static transfer switch will perform a
transfer of the load from the inverter to the bypass source, with no interruption in power to the load. Should the
inverter be asynchronous with the bypass, the static transfer switch will perform a transfer of the load from the
inverter to the bypass, with interruption in power to the load. This is to avoid paralleling of unsynchronised AC sources.
This interruption is programmable but typically set to be less than 3/4 of an electrical cycle, for example, less than
15ms (50Hz) or less than 12.5ms (60Hz).
4.3.5 Maintenance Mode (Manual Bypass)
If UPS maintenance or repair is needed, you may use the maintenance switch to transfer the load to the maintenance
bypass, with no interruption in power to the load. This maintenance switch is fitted in all UPS modules and rated for
full load of one module.
4.3.6 Parallel Redundancy Mode (System Expansion)
For higher capacity or higher reliability or both, the outputs of multiple UPS modules can be programmed for directly
paralleling while a built-in parallel controller in each UPS ensures automatic load sharing. The parallel system can be
composed of up to four UPS modules.
4.4 Battery Management (Set During Commissioning)
4.4.1 Normal Function
1. Constant current boost charge.
The charge current can be set.
2. Constant voltage boost charge.
The boost charge voltage can be set as required by the type of battery.
For valve-regulated lead-acid (VRLA batteries, the maximum boost charge voltage should not exceed 2.4V/cell.
3. Float charge.
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 4 Operation
31
The float charge voltage can be set as required by the type of battery.
For VRLA batteries, the float charge voltage should be between 2.2V/cell and 2.3V/cell.
4. Float charge temperature compensation (optional).
The temperature compensation coefficient can be set as required by the type of battery.
5. EOD protection.
When the battery voltage drops to the EOD voltage, the battery converter shuts down automatically and the battery is
isolated to avoid further battery discharge. The EOD voltage is settable from 1.6V/cell to 1.75V/cell (VRLA).
6. Battery low pre-warning time.
The battery low pre-warning time is adjustable between 3min and 60min. The default setting is 5min.
4.4.2 Advanced Function
The UPS provides an advanced function, battery maintenance test. At periodic intervals, 20% of the rated capacity of
the battery will be discharged automatically, and the actual load must exceed 20% of the rated UPS (kVA) capacity. If
the load is less than 20%, the automatic discharge cannot be executed. The periodic interval can be set from 30 to
360 days. The battery self-test can be disabled.
Conditions: battery at float charge for at least 5h, load equal to 20% ~ 80% of rated UPS capacity.
Trigger: manually through the command of Battery Maintenance Test in LCD or automatically.
Battery maintenance interval: 30 ~ 360 days (default setting: 60 days).
4.5 Battery Protection (Set By Commissioning Engineer)
Battery low pre-warning
The battery low pre-warning occurs before the EOD. After this pre-warning, the battery should have the capacity for
three remaining minutes discharging with full load. The time can be configured from 3min to 60min.
EOD protection
When the battery voltage drops to the EOD voltage, the battery converter shuts down. The EOD voltage is adjustable
from 1.6V/cell to 1.75V/cell (VRLA).
Battery disconnect device alarm
The battery disconnect device alarm occurs when the battery disconnect device disconnects.
The external battery connects to the UPS through the external BCB. The BCB is manually closed and tripped by the
UPS control circuit.
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Chapter 5 Operator Control And Display Panel
Chapter 5 Operator Control And Display Panel
This chapter expands the functions and use of the components on the operator control and display panel of the UPS,
provides LCD display information, including the LCD screen types, detailed menu messages, prompt windows and
UPS alarm list, and tells how to select language and change the current data and time.
5.1 Introduction
The operator control and display panel is located on the front door of the UPS. It is the access point for operator
control and monitoring of all measured parameters, UPS and battery status and alarms. The operator control and
display panel is divided into three functional areas: mimic power flow chart, LCD display with menu keys, control keys,
as shown in Figure 5-1. The components on the operator control and display panel are described in Table 5-1.
LCD display with menu keys
Mimic power flow chart
6
3
1
单机在
Lieber
1
NXr
kV
NX -3X3
5t线
A
0
STATUS
4
5
20 151 3
- -kVA
08单机
00 1
在线
主路输入
7
1 211:3 :3
: : 正
6 1270 6
常
8
旁路输入
交流输出
A(AB)
B(BC)
C(CA)
B220
( BC )
C ( CA )
220
20.5
20.5
20.5
220
220
220
50.1
50.1
50.1
20
.5
20
.5
20.5
380
380
380
50 .1
50 .1
50.1
0.99
0.99
0.99
380
380
380
相电压( V)
相电流
相电压
(V() A)
频率(Hz)
相电流
(A )
线电压
频率
(Hz ) ( V)
功率因数
线电压
(V )
2
Control keys
EPO
A( AB
220)
功率因数
0 .99
0 .99
交流输出
主路空开闭合
手动开机
主路逆变供电
0 .99
INVERTER ON
INVERTER OFF
01 - 12
01 - 22
?
F1
F2
Figure 5-1
Table 5-1
Part No.
1
F3
F4
F5
FAULT CLEAR
SILENCE ON / OFF
Operator control and display panel
Description of operator control and display panel
Function
Key
Function
Rectifier indicator
EPO
EPO switch
2
Battery indicator
INVERTER ON
Inverter start switch
3
Bypass indicator
INVERTER OFF
Inverter shutdown switch
4
Inverter indicator
FAULT CLEAR
Fault reset switch
5
Output indicator
SILENCE ON/OFF
Audible alarm silencing switch
6
Status indicator
F1 ~ F5
LCD menu keys
7
Buzzer
8
EPO switch cover
5.1.1 Indicators
The indicators mounted on the mimic power flow chart represent the various power paths and current UPS
operational status. The indicators are described in Table 5-2.
Table 5-2
Indicator
Solid green
Rectifier indicator
Indicator description
State
Description
Rectifier in normal operation
Flashing green
Mains input normal, but rectifier not operating
Solid red
Rectifier fault
Off
Rectifier not operating, mains input abnormal
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 5 Operator Control And Display Panel
Indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
State
33
Description
Solid green
Load on battery
Flashing green
Battery EOD pre-warning
Solid red
Battery abnormal (failed, absent or polarity reversed) or battery converter abnormal
(failed, overcurrent or overtemperature)
Off
Battery and battery converter normal, battery charging
Solid green
Load on bypass
Solid red
Bypass power abnormal or outside specifications, or static bypass switch fault
Off
Bypass normal
Solid green
Load on inverter
Flashing green
Inverter turning on, starting up, synchronizing
Solid red
Inverter fault
Off
Inverter not operating
Solid green
UPS output on and normal
Solid red
UPS output on and overloaded
Off
UP output off
Solid green
Normal operation
Solid yellow
Alarm (for example, AC input failure)
Solid red
Fault (for example, fuse or hardware fault)
5.1.2 Audible Alarm (Buzzer)
UPS activity is accompanied by the three kinds of sound listed in Table 5-3.
Table 5-3
Audible alarm description
Alarm sound
Meaning
A short beep
Any key on the operator control and display panel is pressed
Beep every other second
The UPS has a general alarm, for example, AC input failure
Continuous beep
The UPS has a serious fault, for example, fuse or hardware fault
5.1.3 Control Keys
The operator control and display panel provides five control keys, as described in Table 5-4.
Table 5-4
Control key
Description of control keys
Silkscreen
Description
EPO switch
EPO
Emergency Power Off: Cuts off the load power, shuts down the rectifier,
inverter, static bypass
Inverter start switch
INVERTER ON
Starts the inverter
Inverter shutdown
switch
INVERTER OFF
Shuts down the inverter
Fault reset switch
FAULT CLEAR
Restarts the UPS (subject to any fault being cleared)
Audible alarm silencing
switch
SILENCE ON/OFF
When an alarm is active, pressing this button silences the audible alarm.
Pressing this button again enables the buzzer again
5.1.4 LCD And Menu Keys
The operator control and display panel provides an LCD and five menu keys (F1 ~ F5). The menu keys are described
in Table 5-5.
Key
Function 1
Function 2
Table 5-5
Menu key description
F1
F2
F3
F4
F5
Left
Right
Enter
Up
Down
ESC
HOME
Escape
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
34
Chapter 5 Operator Control And Display Panel
Providing 320 × 240 dot matrix graphic display, the user-friendly and menu-driven LCD allows you to easily browse
through the input, output, load and battery parameters of the UPS, learn current UPS status and alarm information,
perform functional setting and control operation. The LCD also stores up to 1024 historical records that can retrieve
for reference and diagnosis.
5.2 LCD Screen Type
5.2.1 Start Screen
Upon UPS start, the UPS executes self-test, and the start screen appears and remains approximately 15 seconds, as
shown in Figure 5-2.
F1
F3
F2
Figure 5-2
F4
F5
Start screen
5.2.2 Primary Screen
After the UPS starts and finishes self-test, the primary screen appears, as shown in Figure 5-3. The primary screen is
divided into four windows: system information window, data window, menu window and keypad window.
#1
Liebert NXr 150 kVA
L-N voltage (V)
L 1-N/L2
220.6
16:21: 17
L2-N/L3
220 .0
L3-N/L1
220.0
L-N current (V)
0.0
0.0
0.0
Frequency (HZ)
50.1
50 .1
50.1
L-L voltage (V)
381.5
0
Power factor (V)
381.0
0
System information window
Data window
381.5
0
OutPut
Menu window
Keypad window
F1
F2
F3
F4
Figure 5-3
F5
Primary screen
The functions of the menu keys F1 ~ F5 for the current screen are shown by self-explanatory icons in the keypad
window as appropriate. From any menu on the primary screen, pressing the F1 key returns to the Output menu。
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 5 Operator Control And Display Panel
35
5.2.3 Default Screen
During UPS operation, if there is no alarm within two minutes, the default screen will appear, as shown in Figure 5-4.
After a short delay, the LCD backlight will turn off. Pressing any menu keys (F1 ~ F5) restores the default screen.
2008-10-30
12:30:36
LIEBERT NX
1#
Liebert NXr
10:07:55
Normal
Parallel 150KVA
system
1(#)
150kVA-3X3
并机系统(1#)
正常
F1
Press
any key to return to
按任意键返回主
the菜单
main menu
F3
F4
F2
F5
Figure 5-4
Default screen
5.3 Selecting Language
The LCD menu and data display is available in 12 languages: Chinese, Dutch, English, French, German, Italian,
Japanese, Polish, Portuguese, Russian, Spanish and Swedish.
Use the following procedures to select the language:
1. On the Output menu screen, press the F3 (left) or F4 (right) key to select the Language menu.
2. Press the F5 (enter) key to move the cursor to the data window of the screen.
3. Press the F3 (up) or F4 (down) key to select the desired language.
4. Press the F5 (enter) key to confirm.
5. Press the F2 (ESC) key repeatedly to return to the Output menu. At this point, the LCD displays in the selected
language.
5.4 Changing The Current Date And Time
Use the following procedures to change the system date and time:
1. On the Output menu screen, press the F3 (left) or F4 (right) key to select the Settings menu.
2. Press the F5 (enter) key to move the cursor to the data window of the screen.
3. Press the F3 (up) or F4 (down) key to select the Date & time item, and then press the F5 (enter) key to confirm.
4. Press the F3 (up) or F4 (down) key to the row displaying the date and time, and press the F5 (enter) key to
confirm.
5. Use the F3 (up) or F4 (down) key to input the current date and time.
6. Press the F5 (enter) key to confirm, and press the F2 (ESC) key to return to the Output menu.
5.5 Control Password
Password protection is used to limit the control functions accessible to the operator. The default password is ‘123456’.
This password provides access to UPS and battery test functions.
5.6 Detailed Description Of Menu Items
The description that follows refers to the LCD primary screen shown in Figure 5-3.
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36
Chapter 5 Operator Control And Display Panel
System information window
The system information window displays the current time, UPS name, configuration and alarm silencing state. This
window requires no user operation. For details, see Table 5-6.
Table 5-6
Item discription of system information window
Item
Explanation
UPS name
Current time (format: 24 hours, hour, minute, second)
Unit 1
Liebert NXr
12:30:36
1#
/
Audible alarm enabled or disabled.
: disabled;
: enabled
Menu window and data window
The menu window provides the menus of the data window. The data window displays the items of the menu selected
in the menu window. UPS parameters can be browsed and functions can be set through the menu window and data
window. Details are provided in Table 5-7.
Table 5-7
Menu
Mains
TX Input
Bypass
OutPut
TX Output
Load
System
Battery
Item discription of menu window and data window
Item
L-N voltage (V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor
L-N voltage (V)
L-L voltage (V)
L-N voltage (V)
Frequency (Hz)
L-L voltage (V)
L-N voltage (V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor
L-N voltage (V)
L-L voltage (V)
Sout (kVA)
Pout (kW)
Qout (kVAR)
Load level (%)
Crest factor
Sout (kVA)
Pout (kW)
Qout (kVAR)
Single unit, no parallel
system data
Battery voltage (V)
Battery current (A)
Battery temperature (°C)
Battery remain time (min)
Battery capacity (%)
Battery boost charging
Explanation
Phase voltage
Phase current
Input frequency
Line voltage
Power factor
Phase voltage
Line voltage
Phase voltage
Bypass frequency
Line voltage
Phase voltage
Pahse current
Output frequency
Line voltage
Power factor
Phase voltage
Line voltage
Sout: apparent power
Pout: active power
Qout: reactive power
Load (expressed in percentage of the UPS rating load )
Output current crest factor
Sout: apparent power
Pout: active power
Qout: reactive power
Battery float charging
Battery is float charging
Battery is not connected
Battery is not connected
Displays the active alarms. For the list of the alarms that may be displayed on
the LCD on the UPS operator control and display panel, refer to Table 5-9
Displays the alarm history. For the list of the alarms that may be displayed on
the LCD on the UPS operator control and display panel, refer to Table 5-9
Provides 12 optional LCD languages
Event
(active alarm)
Records
(alarm history)
Language
(language option)
Displayed in this data window when the UPS is configured as a single unit
Battery bus voltage
Battery bus current
Battery temperature
Remaining battery backup time
Percentage of battery life when compared to a new battery
Battery is boost charging
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
Chapter 5 Operator Control And Display Panel
Menu
Item
Display contrast
Date format set
Date & time
Comm1 baud rate
Settings
(refer to Intellislot
configuration
procedure for
recommended
settings)
Comm2 baud rate
Comm3 baud rate
Communication address
Communication mode
Callback times
Phone No.1
Phone No.2
Phone No.3
Command password
Protocol
Battery maintenance test
Command
(initiate,
stop
battery, system
test or freshening
charge
Version
Battery capacity test
System test
Stop testing
Freshening charge
Stop freshening charge
Modem
auto-answer
enabled
UPS version
UPS model
37
Explanation
Adjusts the LCD contrast
Four formats selectable: MM/DD/YYYY, DD/MM/YYYY, YYYY/MM/DD
Sets the date and time
Sets the RS232 communication baud rate of the RS232 service port and of
Intellislot 1 port
Sets the RS232 communication baud rate of Intellislot 3 port
Sets the RS485 communication baud rate of Intellislot 1 ~ 3 ports
Applicable to RS485 communication
Sets the communcation mode
When the communication mode of Intellislot 1 port is modem, this parameter
sets the number of callback attempts for each new alarm
Sets the first priority telephone number to be dialled upon alarm when the
communication mode of Intellislot 1 port is modem
Sets the second priority telephone number to be dialled upon alarm when the
communication mode of Intellislot 1 port is modem
Sets the third priority telephone number to be dialled upon alarm when the
communication mode of Intellislot 1 port is modem
The user can modify the command password
System protocols available : Velocity, YDN23
This test performs a partial discharge of the battery to obtain a rough estimate
of the battery capacity. Load must be between 20% and 80%
This test performs a full discharge of the battery to obtain a precise measure of
the battery capacity. Load must be between 20% and 80%
This is a self-test of the UPS. When the user activates this function, a window
appears about five seconds later to show the test result
Manually stops a battery maintenance test, battery capacity test or system test
Manually initiates a battery freshening charge
Manually stops a battery freshening charge
Manually enable the modem’s auto-answer function
Provides UPS inverter, rectifier and monitoring software versions
Provides UPS model information, for example, 400V-60Hz
Keypad window
The functions of the menu keys F1 ~ F5 for the current screen is shown by self-explanatory icons in the keypad
window as appropriate.
5.7 Prompt Window
A prompt window is displayed during the operation of the system to alert you to certain conditions or to require your
confirmation of a command. The prompts are provided in Table 5-8.
Table 5-8
Prompt
Transfer with interrupt, confirm or
cancel
The load is too high to be transferred
with interrupt
This operation leads to output
shutdown, confirm or cancel
This operation leads to inverter
overload, confirm or cancel
Turn on more UPS to carry current
load
Battery will be depleted, confirm or
cancel
System self test finished, everything is
Prompts and meanings
Meaning
The inverter and bypass supplies are not synchronized and any load transfer between
the inverters and bypass will cause a brief load interruption
The total load must be less than the capacity of one UPS to allow a parallel system to
perform an interrupted transfer from bypass to inverter
The bypass is abnormal, turning off the inverters will cause the load to be
dis-engergised
Turning off this inverter will lead to the overload of the remaining inverter(s) in a
parallel system
The number of inverters already turned on is insufficient to carry the exisitng load. The
user is required to turn on more inverters
If you select battery maintenance test, the battery will discharge until the UPS shuts
down. This prompt appears to require your confirmation. Cancelling the test will ends
the test and transfers the UPS to Normal mode
No action required
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Chapter 5 Operator Control And Display Panel
Prompt
OK
Please check the current warnings
Enter control password
Battery Self Test aborted, conditions
not met
Battery Refresh Charge aborted,
conditions not met
Meaning
Check the active alarm messages
Required for battery or UPS test (default: 123456)
Battery selt-test condition is not met. Please check whether the battery is in boost
charge state and the load is more than 20%
This prompt appears when you select the Freshening charge command while the a
battery freshening charge condition (such as no battery, charger failure) is not met
5.8 Alarm List
Table 5-9 provides the complete list of UPS alarm messages for display either on the Event menu or on the Records
menu described in Table 5-7.
Table 5-9
Alarm
Comm. fail
Parallel Comm. Fail
Battery Overtemp.
Ambient Overtemp.
Battery Replaced
Battery Low Pre-warning
Battery End of Discharge
Mains Volt. Abnormal
Mains Undervoltage
Mains Freq. Abnormal
Batt. Charger Fail
Control Power 1 Fail
Mains Phase Reversed
Rectifier Fault
Rectifier Overtemp
Soft Start Fail
Bypass Unable to Trace
Bypass Abnormal
Alarm list
Explanation
The communication of the internal monitor with the rectifier, inverter or bypass failed
The communication between the inverter of each UPS in the parallel system failed.
1.Check if any UPSs are offline. If yes, power on these UPSs and check if the alarm disappears.
2. Press the FAULT CLEAR button
The battery temperature is over limit. Check the battery temperature and ventilation
The ambient temperature is over limit. Check the ventilation of the UPS room
Battery test failed. The battery needs replacement
Before the EOD, battery low pre-warning will occur. After this pre-warning, the battery will have the
capacity for three minutes discharging with full load. The time is user-settable from 3 minutes to 60
minutes. Please shut down the load in time
Inverters turned off due to battery EOD. Check the mains failure and try to recover it
The mains voltage is outside specifications and results in rectifier shutdown. Check the rectifier input
phase voltage
Mains voltage is under limit with derated load. Check the rectifier input line voltage
The mains frequency is outside specifications and results in rectifier shutdown. Check the rectifier input
voltage and frequency
The voltage of the battery charger is too high
The UPS is operating but the control power is abnormal or not available
The AC input phase rotation is reversed
Internal fault of a power module is detected and results in rectifier shutdown and battery discharging
The temperature of the heatsink is too high to keep the rectifier running. The UPS can recover from this
fault automatically. Check the environment and ventilation
The rectifier can not start owing to low DC bus voltage. Seek assistance from the local customer
service center of Emerson
This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage is outside specifications. The amplitude threshold is fixed for ±10% rating. This alarm
automatically resets once the bypass voltage goes normal.
1. First verify that the bypass voltage and frequency displayed on the LCD are within the selected
ranges. Note that here the rated voltage and frequency are specified by Output voltage level and
Output frequency level respectively.
2. If the displayed voltage is believed to be abnormal, then verify the bypass voltage and frequency
presented to the UPS. Check the external supply if it is found faulty
This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage exceeds the limit. The amplitude threshold is fixed for ±10% rating. This alarm automatically
resets once the bypass voltage returns to normal.
1. First check if there are some relevant alarms such as Bypass phase reverse and Mains neutral lost.
If they appear, solve them first.
2. Then verify that the bypass voltage and frequency displayed on the LCD are within the bypass limits.
Note that here the rated voltage and frequency are specified by Output voltage level and Output
frequency level respectively.
3. If the displayed voltage is believed to be abnormal, then measure the bypass voltage and frequency
presented to the UPS. If the bypass voltage and frequency are abnormal, check the external bypass
supply.
4. If the mains is likely to trigger this alarm frequently, the bypass limits can be changed to a wider
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Chapter 5 Operator Control And Display Panel
Alarm
Inverter Asynchronous
Inverter fault
Fan fault
Bypass STS Fail
Output Fuse Fail
Control power 1 fail
Unit Over load
System Over load
Unit Over load Timeout
Byp. Abnormal Shutdown
Inverter Over Current
Bypass Phase Reversed
Load Impact Transfer
Transfer Time-out
Load Sharing Fault
DC Bus Abnormal
System Transfer
DC Bus Over Voltage
Bypass Over Current
LBS Active
Mains Neutral Lost
Battery ground fault
39
Explanation
tolerance through the service configuration software
This alarm is triggered by an inverter software routine when the inverter and bypass waveforms are
misaligned by more than six degrees in phase. The amplitude threshold is fixed for ±10% rating. This
alarm resets automatically once the condition is no longer true.
1. First check if the alarm Bypass unable to trace or Bypass abnormal occurs. If so, solve it first.
2. Verify the waveform of the bypass voltage
Inverter output voltage outside specifications. Load transfers to bypass. The faulty power module will
shut down and open output relay, and the remaining power modules will remain online
At least one of the cooling fans failed
At least one of the STSs at the bypass side is open or shorted. This fault is locked until power-off
At least one of the inverter output fuses is blown. The inverter shuts down, and the load transfers to
bypass if the remaining power modules are insufficient to support the load
The UPS is operating but the redundant control power is abnormal or not available
This alarm appears when the load arises above 105% of the nominal rating. The alarm automatically
resets once the overload condition is removed.
1. Find out if this alarm is true by checking which phase has overload through the load (%) displayed
on the LCD.
2. If this alarm is true, measure the actual output current to confirm if the displayed value is correct.
3. If yes, disconnect the non-critical load.
In a parallel system, this alarm will be triggered if the load is severely unbalanced
This alarm appears when the total load rises above 105% of the nominal rating of the parallel
system.The alarm automatically resets once the overload condition is removed.
1. Find out if this alarm is true by checking which phase of which unit has overload through the load (%)
displayed on the LCD.
2. If this alarm is true, measure the actual output current to confirm if the displayed value is correct.
3. If yes, disconnect the non-critical load.
This alarm will be triggered if the load is severely unbalanced
The UPS overload status continues and the overload times out.
Note that:
1. The highest loaded phase will indicate overload time-out first.
2. When the timer is active, then the alarm Unit Over load should also be active as the load is above
the nominal rating.
3. When the time has expired, the load transfers to static bypass. The inverter shuts down and will
restart after 10 seconds.
4. If the load decreases to lower than 95%, after five minutes, the system will transfer back to the
inverter.Check the load (%) displayed on the LCD to confirm if this alarm is true. If the LCD tells that
overload happens, then check the actual load and confirm if the UPS has overload before the alarm
happens
Both the bypass and inverter voltages are abnormal, and the output is off
The inverter has overcurrent fault
The phase rotation of the bypass voltage is reverwed. Normally, phase B lags 120 degrees behind
phase A, and phase C lags 120 degrees behind phase B.
Check that the phase rotation of the UPS bypass supply is correct
A transfer to bypass occurred due to a large step load. The UPS can recover automatically. Turn on the
load equipment in stages to reduce the load impact on the inverter
The load remains on bypass power owing to excessive number of transfers that occurred within the last
hour. The UPS can recover automatically and will transfer the load back to inverter power within an
hour
The UPSs in a parallel system are not sharing the load current correctly
The DC bus voltage is abnormal and results in inverter shutdown. The load transfers to bypass
All UPSs in the parallel system transfer to bypass at the same time when one of them needs to transfer
to bypass. This message appears on the LCD of the UPS with passive transfer to bypass
The rectifier, inverter and battery converter shut down because the DC bus voltage is too high.. Check
if the rectifier has any fault. If no, check if an overload has occurred. Restart the inverter after the fault
is cleared
The bypass current is above 135% of the rated current. The UPS alarms but has no action
The LBS setting is active. The UPS is acting as an LBS master or slave in a dual bus configuration
The neutral line of the AC input mains is not detected
The battery ground fault option has detected a battery ground fault. Contact the local customer service
center of Emerson to inspect the battery installation
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Chapter 5 Operator Control And Display Panel
Alarm
Manual Turn On
Manual Turn Off
EPO
Interrupted Transfer
Confirm
Transfer Cancel
Unit Risk Off Confirm
Parallel System Risk Off
Confirm
Fault Reset
Alarm Silence
Turn On Fail
Audible Alarm Reset
Bypass Mode
Normal Mode
Battery Mode
Source share mode
UPS Shutdown
BCB Open
BCB Close
Batt. Float Charging
Batt. Boost Charging
Battery Discharging
Battery Period Testing
Batt. Capacity Testing
Battery Maintenance
Testing
Inverter in Setting
Rectifier in Setting
Battery room alarm
BCB open
BCB closed
Battery Reverse
Auto start
Rec Flash Update
Inv Flash Update
Monitor Flash Update
Bypass Flash Update
LBS abnormal
Explanation
INVERTER ON button activated on the operator control and display panel to turn on the inverter
INVERTER OFF button activated on the operator control and display panel to turn off the inverter
The local or remote EPO has been activated
A prompt for the user to decide whether to press the Enter key to acknowledge an interrupted load
transfer to bypass
A prompt for the user to decide whether to press the ESC key to avoid an interrupted load transfer to
bypass
A prompt for the user to decide whether to press the Enter key to shut down a UPS in the parallel
system
A prompt for the user to decide whether to press the Enter key to shut down the parallel system
FAULT CLEAR button pressed
SILENCE ON/OFF button pressed
The inverter failed to turn on when the INVERTER ON button is pressed. This may be the result of an
invalid operation (maintenance bypass on) or DC bus or rectifiers not ready
FAULT CLEAR or SILENCE ON/OFF button pressed
The UPS is in bypass mode
The UPS is in normal mode
The UPS is in battery mode
The inverter is supplied by the battery and rectifier at the same time
UPS shutdown with no output power
BCB status (open)
BCB status (closed)
Battery status (float charge mode)
Battery status (boost charge mode)
Battery status (discharge mode)
The battery is under automatic periodic battery maintenance test (20% capacity discharge)
The user initiated a battery capacity test (100% capacity discharge)
The user initiated a maintenance test (20% capacity discharge)
The inverter starts up and is in synchronization
The rectifier starts up and is in synchronization
The temperature in the battery room is high and needs to be attended
BCB status (open)
BCB status (closed)
Reconnect battery and check battery wiring
After UPS shutdown at EOD, the inverter automatically starts upon mains restoration
Rectifier software being updated
Inverter software being updated
Monitoring software being updated
Bypass software being updated
LBS abnormal
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Chapter 6 Operating Instructions
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Chapter 6 Operating Instructions
This chapter provides detailed operating procedures of the UPS.
The audible alarm may annunciate at various points in these procedures. Pressing the SILENCE ON/OFF button can
cancel the audible alarm at any time.
Warning: hazardous mains and/or battery voltage present behind protective cover
The components that can only be accessed by opening the protective cover with tools cannot be operated by user. Only qualified
service personnel are authorised to remove such covers.
6.1 Power Switches
The UPS provides a maintenance switch only (silkscreen: MAINTAIN CB), as shown in Figure 6-1 to Figure 6-3. The
user needs to provide the other switches.
Maintenance switch
Figure 6-1
Location of maintenance switch of 30kVA (NXr 30K-B) UPS
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Chapter 6 Operating Instructions
Maintenance switch
Figure 6-2
Location of maintenance switch of 30kVA (NXr 30K) ~ 160kVA UPS
Maintenance switch
Figure 6-3
Location of maintenance switch of 200kVA UPS
6.2 UPS Startup Procedures
It is assumed that the installation is complete, the system has been commissioned by authorized personnel, and the
external power isolators are closed.
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6.2.1 Procedures For Startup Into Normal Mode
Warning
1. These procedures result in mains voltage being applied to the UPS output terminals.
2. If any load equipment is connected to the UPS output terminals, check with the user that it is safe to apply power. If the load is
not ready to receive power, ensure that it is safely isolated from the UPS output terminals.
3. Do not start the UPS until the installation is completed and the system has been commissioned by authorized personnel.
Use the following procedures to turn on the UPS from a fully powered down condition. In a parallel system, perform
each step of the procedures in every UPS module before proceeding to the next step.
1. Close the external input switch to the UPS to feed the mains power to the UPS, and close the external BCB. In split
bypass configuration, it is required to close both input switches.
At this point, the LCD starts up. The rectifier indicator flashes in green color during rectifier startup. About 30s after
the rectifier enters normal operation, the rectifier indicator goes solid green. After system initialization, the bypass
STS is closed. The UPS indicator states are as listed in Table 6-1.
Table 6-1
UPS indicator state
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
State
Green
Off
Green
Off
Green
Amber
2. Press and hold the INVERTER ON button for 2s.
The inverter starts up, and the inverter indicator flashes in green color. After the inverter is ready, the UPS transfers
from bypass to inverter, the bypass indicator turns off, the inverter indicator and output indicator turn on.
The UPS is in normal mode, and the UPS indicator states are as listed in Table 6-2.
Table 6-2
UPS indicator state
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
State
Green
Off
Off
Green
Green
Green
6.2.2 Procedures For Startup In Battery Mode (Startup Without A.C. Input Supply)
1. Verify that the battery is properly connected.
2. Press the battery start button (see Figure 6-4) on the front panel of any power module.
At this point, the LCD starts up, and the battery indicator starts flashing in green color. After the rectifier has operated
normally for 30s, the battery indicator stops flashing and becomes solid green.
电池启动按钮
Battery
start button
Figure 6-4
Location of battery start button
Note
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Chapter 6 Operating Instructions
After step 2, if any of the following conditions occurs, open the BCB or confirm that the BCB has tripped automatically and is open.
The system can be started up one minute later.
EPO action

Fault in system commissioning

3. Press and hold the INVERTER ON button on the operator control and display panel for 2s, and the UPS begins to
operate in battery mode.
6.3 Procedures For Transfer Between Operation Modes
6.3.1 Transfer From Normal Mode To Battery Mode
Open the external power switch to isolate the mains power and initiate the UPS on battery mode. To transfer the UPS
back to normal mode, wait for several seconds, then close the external power switch to re-connect the mains power
to the UPS. 10s later, the rectifier restarts automatically to feed power to the inverter.
6.3.2 Transfer From Normal Mode To Bypass Mode
When the UPS is in normal mode, press the INVERTER OFF button on the operator control and display panel
transfers the UPS from normal mode to bypass mode.
Note
In bypass mode, the load is directly fed by the mains power instead of the pure AC power from the inverter.
6.3.3 Transfer From Bypass Mode To Normal Mode
When the UPS is in bypass mode, press the INVERTER ON button on the operator control and display panel. After
the inverter enters normal operation, the UPS is transferred from bypass mode to normal mode.
6.3.4 Transfer From Normal Mode To Maintenance Mode
These procedures transfer the load from the UPS inverter output to the maintenance bypass supply, but the
precondition is that the UPS is in normal mode.
Caution
Before making this operation, read the information on the LCD to make sure that the bypass supply is normal and that the inverter
is synchronous with the bypass sypply, so as not to risk a short interruption in power to the load.
1. Press and hold the INVERTER OFF button on the operator control and display panel for 2s.
At this point, the inverter indicator turns off, the bypass indicator turns on, and the status indicator changes to amber,
accompanied by an audible alarm. The load transfers to the bypass, and the inverter shuts down.
Note
Pressing the SILENCE ON/OFF button cancels the audible alarm but leaves the alarm message displayed until the alarm
condition is rectified.
2. For a single UPS, open the UPS door and rotate the maintenance switch from the OFF position to the ON position;
for a 1+N parallel system, close the external maintenance switch.
At this point, the load power supply is provided by the manual maintenance bypass.
Warning
1. If you need to maintain a faulty module, wait for 10min to let the internal DC bus capacitor fully discharge before removing the
faulty module for maintenance.
2. When the UPS in operating in maintenance mode, the neutral line is still energized. Therefore, only qualified personnel shall
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Chapter 6 Operating Instructions
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maintain the UPS.
Caution
When the UPS is in maintenance mode, the load is not protected against abnormal mains supply.
6.4 Procedures For Completely Powering Down The UPS
Caution
The following procedures will switch off all power to the load.
Warning: hazardous battery voltage
The UPS battery and connecting terminals remain energized at hazardous voltage levels at all times.
The following procedures are used to completely power down the UPS and load. All power switches, isolators and
circuit breakers will be opened and the power will be removed from the load. In a parallel system, perform each step
of the procedures in every UPS module before proceeding to the next step.
1. Press the EPO switch on the UPS front panel. This disables the rectifier, inverter, static transfer switch and battery
operation, and the load is de-energised.
Note: Unless in an emergency situation, do not press the remote EPO switch.
2. Open the external a.c. input switch and BCB. In split bypass configuration, it is required to open both a,c. input
switches.
In a parallel system, at this point, other UPSs report Parallel Comm. Fail, which is normal. Other UPSs continue to
power the load through the inverter.
All of the indicators and the LCD on the front panel will extinguish as the mains-driven internal power supplies decay.
3. Open the external a.c. output switch of the UPS.
6.5 Procedures For Completely Powering Down The UPS While Maintaining he
Power Supply To The Load
Caution
Ensure that the UPS has been installed with an external maintenance bypass cabinet before carring out these procedures.
The following procedures are applicable for completely powering down the UPS and still keeping the power supply to
the load. In a parallel system, perform each step of the procedures in every UPS module before proceeding to the
next step.
1. Use the procedures in 6.3.4
maintenance mode.
Transfer From Normal Mode To Maintenance Mode to transfer the UPS to
2. Close the maintenance switch of the external maintenance bypass cabinet.
3. Open the external a.c. input switch of the UPS. In split bypass configuration, it is required to open both external a.c.
input switches.
4. Open the output switch of the UPS.
6.6 Isolation Procedures (Of One UPS In A Parallel System)
Caution
The following procedures will switch off all power to the load.
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Chapter 6 Operating Instructions
Warning: hazardous battery voltage
The UPS battery and connecting terminals remain energized at hazardous voltage levels at all times.
The following procedures are used to isolate one UPS from a parallel system.
1. Press the EPO switch of the UPS to be isolated.
2. Open the external a.c .input switch and BCB of the UPS. In split bypass configuration, it is required to open both
external a.c input switches.
At this point, other UPSs report Parallel Comm. Fail, which is normal. Other UPSs continue to power the load through
the inverter.
3. Open the external a.c output switch of the UPS.
4. Wait for 10 minutes before carrying out UPS maintenance or repair.
6.7 Insertion Procedures (Of One UPS In A Parallel System)
The procedures are used to re-integrate a UPS that has been previously isolated from a parallel system. It is
assumed that the installation is completed and the system has been commissioned by authorized personnel.
1. Close the external a.c output switch of the UPS to be re-integrated.
2. Close the external a.c input switch and BCB of the UPS. In split bypass configuration, it is required to close both
external a.c input switches.
3. Press and hold the INVERTER ON button of the UPS for 2s.
The inverter starts up, and the inverter indicator starts flashing in green color. When the inverter is ready, the UPS
transfers to parallel operation with other UPSs, and the inverter indicator goes to a continuous on state.
The UPS is in normal mode, and the UPS indicator states are as listed in Table 6-3.
Table 6-3
UPS indicator state
Indicator
Rectifier indicator
Battery indicator
Bypass indicator
Inverter indicator
Output indicator
Status indicator
State
Green
Off
Off
Green
Green
Green
6.8 Emergency Power Off (EPO) Procedures
The EPO switch is designed to switch off the UPS in emergency conditions (that is, fire, flood, and so on). The
system will turn off the rectifier, inverter and stop powering the load immediately (including the inverter and bypass),
and the battery stops charging or discharging.
If the input mains is present, the UPS’s control circuit will remain active; however, the output will be turned off. To
remove all power from the UPS, the external feeder breaker should be opened.
Note
In a parallel system, the EPO only isolates the UPS whose EPO has been activated.
6.9 Automatic Restart
In the case of a mains failure, the UPS draws power from the battery system to supply the load until the batteries are
depleted. When the UPS reaches its end of EOD threshold, it shut will down.
The UPS will automatically restart and enable output power:
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 after the mains power is restored
 if Auto Recovery after EOD Enabling is enabled
 after the Auto Recovery after EOD Delay Time expires (the default delay is 10min). during the automatic
recovery delay, the UPS will charge its batteries to provide a safety margin for equipment shutdown if input
power fails again
If the Auto Recovery after EOD Enabling feature is disabled, the user may restart the UPS manually by pressing the
FAULT CLEAR button.
6.10 UPS Reset Procedures
After an EPO action or UPS shutdown due to inverter over temperature, overload, battery over-voltage or too many
transfer times, once all appropriate measures have been taken to correct the problem indicated by the alarm
message on the LCD, carry out the following procedures to restore the UPS to normal operation.
1. Press the FAULT CLEAR button to let the system exit the shutdown state.
2. When the rectifier begins to operate normally (rectifier indicator in solid green), press and hold the INVERTER ON
button for 2s.
Note
1. The rectifier will start and the bypass will begin to power the load. The rectifier indicator flashes while the rectifier is starting up.
When the rectifier enters normal operation (about 30s later), the rectifier indicator turns green.
2. The rectifier will be turned on automatically when the overtemprature fault disappears 5 minutes after the disappearance of
overtemprature signals.
After the EPO switch is pressed, if the mains input is cut off, the UPS will shut down completely. When the mains
input returns, the UPS will start up on bypass. There will be power at the output terminals of the UPS.
Warning
1. If the maintenance switch is in the ON position and the mains input is present, there will be power at the otuput terminals of the
UPS.
2. If you need to maintain a faulty module, wait for 10min to let the internal DC bus capacitor fully discharge before removing the
faulty module for maintenance.
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Chapter 7 Service
Chapter 7 Service
This chapter introduces the UPS service, including the service procedures of the power module and bypass modules,
and the replacement procedures of the air filters.
Warning: hazardous mains and/or battery voltage present behind protective cover
1. The components that can only be accessed by opening the protective cover with tools cannot be operated by user. Only
qualified service personnel are authorised to remove such covers.
2. In UPS maintenance, note that the neutral line is energized.
7.1 Service Procedures Of Power Module And Bypass Module
7.1.1 Notes
1. Only the customer service engineers shall service the power modules and bypass module.
2. Remove the power modules and bypass module from top to bottom, so as to prevent cabinet toppling due to high
gravity center.
3. To ensure safety, before servicing the power modules and bypass module, be sure to use a multimeter to verify
that the DC bus capacitor voltage is lower than 60Vdc, and that the voltages between the earth and the components
you are going to work on are under dangerous voltage values, that is, lower than 60Vdc or 42.4Vac peak value.
4. The bypass module is not swappable. Only when the UPS is transferred to internal or external maintenance
bypass or completely powered off can the bypass module be removed.
5. The power modules and bypass module should be serviced 10 minutes after they are removed.
7.1.2 Service Procedures Of Power Module
Provided that the UPS is in normal mode, and that the bypass is normal:
1. If the available UPS power modules have redundancy, proceed to step 2; if not, press and hold the INVERTER
OFF button on the operator control and display panel for two seconds to manually turn off the inverters, and the UPS
transfers to bypass mode.
2. Place the ready switch on the front panel of the power module to the up position (that is, in unready state).
3. Two minutes later, remove the fixing screws on both sides of the front panel of the module, and pull the module out
of the cabinet.
Note
The module will be blocked by a spring piece on the left side of the module when the module is pulled out of the cabinet halfway.
At this point, you must press the spring piece before you continue to pull the module out.
4. After servicing the module, check that the address of this module is different from those of other modules and that
the address is in the range from one to five (one to six for 200kVA UPS). Check that the ready switch is in unready
state.
5. Push the module (at least 10s after another) into the cabinet, and tighten the screws on both sides.
6. Wait for two minutes, place the ready switch of the module to the down position, and the module will connect to the
system. If the UPS has been transferred to bypass, press and hold the INVERTER ON button for two seconds to start
up all power modules.
7.1.3 Service Procedures Of Bypass Module
Provided that the UPS is in normal mode, and that the bypass is normal:
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1. Press and hold the INVERTER OFF button on the operator control and display panel for two seconds to manually
turn off the inverters, and the UPS transfers to bypass mode.
2. Close the maintenance bypass, and the UPS transfers to maintenance mode.
3. Open the external a.c UPS output switch and input switch. In split bypass configuration, it is required to open
external a.c both input switches.
4. Press the EPO switch, ensure that the battery current is 2A. Open the BCB or disconnect the batteries.
5. Remove the fixing screws on both sides of the front panel of the bypass module, and pull the module out of the
cabinet. Wait for 10 minutes before servicing the bypass module.
6. After servicing the module, push the module (at least 10s after another) into the cabinet, and tighten the screws on
both sides.
7. Close the external a.c UPS output switch and input switch in turn. In split bypass configuration, it is required to
close both external a.c input switches.
Two minutes later, the bypass indicator on the operator control and display panel turns on, indicating the UPS is
operating in bypass mode.
8. Open the maintenance switch, press and hold the INVERTER ON button on the operator control and display panel
for two seconds to manually turn on the inverters, and the UPS transfers to normal mode.
7.2 Replacement Procedures Of Air Filter
As shown in Figure 7-1 and Figure 7-2, the UPS provides air filters on the back of the front door. Each air filter is fixed
by a fixing bar on both sides. The air filter replacement procedures are as follows:
1. Open the front door of the UPS to reveal the air filters on the back of the door.
2. Remove the fixing bar on either side of the air filter, and loosen the fixing screws of the fixing bar on the other side,
with no need to remove this fixing bar.
3. Remove the air filter, and insert a clean one.
4. Re-install the removed fixing bar in the original place.
5. Tighten the fixing screws of the fixing bar on the other side.
Fixing screw
Fixing bar
Fixing bar
Air filter
Figure 7-1
Replacing air filter of 30kVA ~ 160kVA UPS
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Chapter 7 Service
Fixing screw
Fixing bar
Fixing bar
Air filter
Figure 7-2
Replacing air filter of 200kVA UPS
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Chapter 8 Product Specifications
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Chapter 8 Product Specification
The chapter provides the UPS specifications.
8.1 Conformity And Standards
The UPS has been designed to conform to the European and international standards listed in Table 8-1.
Table 8-1
European and international standards
Item
Normative reference
General and safety requirements for UPS used in operator
EN62040-1-1/IEC62040-1-1/AS62040-1-1
access areas
Electromagnetic compatibility (EMC requirements for UPS
EN62040-2/IEC62040-2/AS62040-2 (C2 type)
Method of specifying the performance and test requirements of
EN62040-3/IEC62040-3/AS62040-3 (VFI SS 111)
UPS
Note: The product standards in this table incorporate relevant compliance clauses with generic IEC and EN standards for safety
(IEC/EN/AS60950), electromagnetic emission and immunity (IEC/EN/AS61000 series) and construction (IEC/EN/AS60146 series
and 60529)
8.2 Environmental Characteristics
Table 8-2
Item
Unit
Noise within 1m (in the front)
Altitude
Relative humidity
Operating temperature
Storage and transport temperature for UPS
Recommended battery storage
temperature
Over voltage category IEC 60664-1
Pollution degree IEC 60664-1
dB
m
%RH
°C
°C
°C
Environmental characteristics
Rated power (kVA)
30
40, 60
90, 100, 120
150, 160
200
56
58
60
62
66
≤1000, derate power by 1% per 100m between 1000m and 2000m
0 ~ 95, non condensing
0 ~ 40; battery life is halved for every 10°C increase above 20°C
-20 ~ 70
-20 ~ 30 (20°C for optimum battery storage)
level 2
level 2
8.3 Mechanical Characteristics
Table 8-3
Item
Unit
30
Dimensions (W × D × H)
Weight (excluding battery)
Color
Protection degree, IEC(60529)
Mechanical characteristics
mm
kg
40,60
Rated power (kVA)
90, 100
120
150, 160
600 × 843 × 1400
200
234
268
302
336
Charcoal Grey ZP7021 / RAL 7021
IP20 (front door open or closed)
200
600 × 843 × 1600
380
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Chapter 8 Product Specifications
8.4 Electrical Characteristics (Input Rectifier)
Table 8-4
Item
Unit
Rated AC input voltage1
Input voltage range2
Frequency2
Power factor
Input power
Vac
Vac
Hz
kW/kVA, full load (half
load)
kVA rated3 (maximum4)
Input current
A rated 3 (maximum4)
Rectifier AC input (mains)
Rated power (kVA)
30
40
60
90, 100
120
150, 60
200
380/400/415 (3-phase and sharing neutral with the bypass input)
228 ~ 437
50/60 (tolerance: 40Hz ~ 70Hz)
0.99 (0.98)
30
(34.5)
45 (54)
40
(46)
55
(70)
60
(69)
90
(108)
90
(103.5)
135
(162)
120
(138)
180
(216)
150
(173)
225
(270)
180
(207)
270
(320)
Harmonic current distortion
THDI% FL
3
Duration of progressive s
10s to reach full ratd current (selectable 5s through 30s in 5-second
power walk-in
intervals)
Note:
1. Rectifiers operate at any of the rated supply voltages and frequencies without further adjustment.
2. At 305V input mains the UPS maintains the specified output voltage at rated load without discharging a previously charged
battery.
3. IEC62040-3: at rated load and input voltage 400V, battery charged.
4. IEC62040-3: at rated load and input voltage 400V, battery charging at maximum rated power
8.5 Electrical Characteristics (Intermediate DC Circuit)
Table 8-5
Item
Battery bus voltage
Quantity of
lead-acid cells
Float voltage
Temperature
compensation
Ripple voltage
Ripple current
Boost voltage
Unit
Battery
Vdc
Rated power (kVA)
30
40
60
90, 100
120
Nominal: 360 (VRLA float charge is 405V); range: 300 ~ 576
Maximum
40 x 6-cell 12V blocks
Minimum
V/cell (VRLA)
30 x 6-cell 12V blocks
2.25 (selectable from 2.2V/cell to 2.3V/cell)
Constant current and constant voltage charge mode
–3.0 (selectable from 0 to –5.0 around 25°C or 30°C, or inhibit)
mV/°C/cl
% V float
% C10
V/cell (VRLA)
Boost control
EOD voltage
V/cell (VRLA)
Battery charge
V/cell
Battery
charging power1
and max charging
current
(adjustable)2
kW
A
150, 160
≤1
≤5
2.35 (selectable from 2.30V/cell to 2.40V/cell)
Constant current and constant voltage charge mode
Float-boost current trigger 0.050C10 (selectable from 0.030 to 0.070)
Boost-float current trigger 0.010C10 (selectable from 0.005 to 0.025)
24hr safety time timeout (selectable from 8hr to 30hr)
Boost mode inhibit also selectable
1.63 (selectable from 1.60V/cell to 1.750V/cell)3
Automatic inverse, EOD voltage × discharge current mode
(the EOD voltage increases at low discharge currents)
2.4 (selectable from 2.30V/cell to 2.40V/cell)
Constant current and constant voltage charge mode
Programmable automatic trigger or inhibit of boost mode
4.5
6
9
13.5
18
22.5
11
14.7
22
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44
55
200
27
66
Chapter 8 Product Specifications
53
Note:
1. At low input voltage the UPS recharge capability increases with load decrease (up to the maximum capacity indicated).
2. Max currents listed are for EOD voltage of 1.67V/cell for 240 cells
3.Need to satisfy DC bus voltage for inverter operation of 300-576 Vdc.
8.6 Electrical Characteristics (Inverter Output)
Table 8-6
Item
Unit
Rated AC voltage1
Frequency2
Vac
Hz
%
Overload
Inverter output (to critical load)
Rated power (kVA)
30 ~ 200
380/400/415 (three-phase four-wire, with neutral reference to the bypass neutral)
50/60
105, long term
110, 60min
125, 10min
150, 1min
>150, 200ms
310% current limination for 200ms
Fault current
%
Non-linear load
%
100
capability3
Neutral current capability
%
170
Steady state voltage
%
±1
stability
Transient voltage
%
±5
response4
Tatal harmonic voltage
%
<1 (linear load), <4 (non-linear load3)
Synchronisation window
Hz
Rated frequency ±5
Slew rate (max change
rate of synchronisation
Hz/s
1; setting range: 0.1 ~ 3 (single unit), 0.2 (parallel system)
frequency)
Note:
1. Factory set to 380V. 400V or 415V selectable by commissioning engineer.
2. Factory set to 50Hz. 60Hz selectable by commissioning engineer. 3. IEC 62040-3 (1.4.58) crest factor 3:1.
4. IEC 62040-3 also for 0% ~ 100% ~ 0% load transient. Transient recovery time: return to within 5% of steady state output
voltage within half a cycle
8.7 Electrical Characteristics (Bypass Input)
Table 8-7
Item
Unit
Rated AC voltage1
Rated
current
Vac
380V
400V
415V
Overload
A
A
A
%
Upstream protection,
bypass line
Current rating of neutral
cable
Frequency2
Transfer time (between
bypass and inverter)
N/A
Bypass input
Rated power (kVA)
30 (NXr 30K-B)
30 (NXr 30K) ~ 160
200
380/400/415, three-phase four-wire, sharing neutral with the rectifier input and
providing neutral reference to the output
45
227
303
43.5
217
290
42
208
278
110, long term
125%
150%
Thermomagnetic circuit breaker, rated up to 125% of nominal output current. IEC
60947-2 curve C
A
1.7 × In
Hz
50/60
Synchronous transfer: ≤1
Asynchronous transfer (default): 15 (50Hz), 13.3 (60Hz); or 40, 60, 80, 100
selectable
ms
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Chapter 8 Product Specifications
Item
Unit
Bypass voltage tolerance
%Vac
Rated power (kVA)
Upper limit: +10, +15 or +20, default: +15
Lower limit: -10, -20, -30 or –40, default: -20
(delay time to accept steady bypass voltage: 10s)
Bypass frequency
%
±10 or ±20, default: ±10
tolerance
Synchronisation window
Hz
Rated frequency: ±5
Note:
1. Factory set to 380V. 400V or 415V selectable by commissioning engineer.
2. Factory set to 50Hz. 60Hz selectable by commissioning engineer
8.8 Efficiency, Heat Losses And Air Exchange
Table 8-8
Item
Efficiency, heat losses and air exchange
Unit
30
40, 60
Overall efficiency
Normal mode (double-conversion)
Battery mode
Normal mode
%
Rated power (kVA)
90, 100
120
150, 160
Up to 96
Inverter efficiency (DC/AC) (battery at nominal voltage 432Vdc and full-rated linear load)
%
Up to 96
Heat losses & air exchange
kW
1.2
2.4
3.6
4.8
No load
kW
0.6
1.2
Maximum forced air cooling (front
L/sec
144
288
intake, rear exhaust)
Note: 400Vac input and output, battery fully charged, full-rated linear load
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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1.8
432
2.4
576
6
7.2
3.0
720
3.6
864
Appendix 1
Option
55
Appendix 1 Option List
Table 1
Option
Dry contact card
SIC card
UF-RS485 card
Modbus card
Battery temperature sensor
Air filter
Model
UF-DRY310
UF-SNMP810
UF-RS485
UFMOD41Z1
UF-SENSOR
LBS cable (5m, 10m, 15m)
Parallel control cable (5m,
10m, 15m)
Bypass load sharing inductor
Bypass load sharing inductor
Bypass load sharing inductor
Bypass load sharing inductor
UF-NRBYPCK-30
UF-NRBYPCK-100
UF-NRBYPCK-160
UF-NRBYPCK-200
Option list
BOM No.
02354309
02351817
02351786
02354066
02350174
21120752
5m cable
(04118683)
10m cable
(04118684)
15m cable
(04118685)
5m cable
(04118683)
10m cable
(04118684)
15m cable
(04118685)
02354315
02354040
02354042
02354314
Remark
Installed in Intellislot port, advisably in Intellislot 3
Installed in Intellislot port , advisably in Intellislot 2
Installed in Intellislot port , advisably in Intellislot 3
Installed in Intellislot port , advisably in Intellislot 3
One air filter
Two cables should be selected to achieve
redundancy
Two cables should be selected to achieve
redundancy
Applicable to NXr 30K-B UPS
Applicable to 30kVA (NXr 30K) ~ 100kVA UPS
Applicable to 120kVA ~ 160kVA UPS
Applicable to 200kVA UPS
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual
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Chapter 8 Product Specifications
Appendix 2 List Of Abbreviations
Abbreviation
Description
UPS
Uninterruptible power system
AC
Alternating current
DC
Direct current
SCR
Silicon-controlled rectifier
RCCB
Residual current circuit breaker
RCD
Residual current detector
RFI
Radio frequency interference
EOD
End-of-discharge
CSA
Cross sectional area
PE
Protective Earth
SCR
Silicon-controlled rectifier
EPO
Emergency power off
MCCB
Moulded-case circuit breaker
CT
Center tap
BCB
Battery circuit breaker
LBS
Load bus synchronizer
PWM
Pulse width modulation
DSP
Full digital control
STS
Static transfer switch
VRLA
Valve-regulated lead-acid
LCD
liquid crystal display
EMC
Electromagnetic compatibility
NXr UPS Module And Parallel System 30kVA ~ 200kVA User Manual