- No category
advertisement
CPS SC
Series Grid-tied PV Inverter
CPS SC100KT-O/US-480
Installation and Operation Manual
Version: 1.1
CHINT POWER SYSTEMS AMERICA CO., LTD.
Address: 700 International Parkway,
Suite 102 Richardson, Texas
Zip Code: 75081
Web: www.chintpower.com/na
Email: [email protected]
Service Hotline: 855-584-7168
SHANGHAI CHINT POWER SYSTEMS CO., LTD. All rights reserved.
Specifications and designs included in this manual are subject to change without notice.
CHINT POWER 2013/06-MKT PN: 9.0020.0041F0
Table of Contents
Chapter 1 IMPORTANT SAFETY INSTRUCTIONS ............................... 2
Chapter 2 Overview ............................................................................... 8
2.1 Inverter for grid-tied PV systems ................................................ 8
2.2 Product type description ............................................................. 8
2.3 Product features ......................................................................... 9
2.4 Inverter circuit structure .............................................................. 9
2.5 Appearance description .............................................................. 10
3.1 Basic requirements ..................................................................... 13
3.2 Checklist of installation tools ...................................................... 14
3.3 Mechanical installation ............................................................... 14
3.4 Electrical installation ................................................................... 20
3.4.1 DC connection .................................................................... 26
3.4.2 AC connection ..................................................................... 31
3.4.3 Ground connection ............................................................. 32
3.4.4 Communication connection ................................................. 33
3.4.5 Connection of dry contact ................................................... 36
3.4.6 Installation of bottom filter and baffles ................................. 37
Chapter 4 Initial On-grid Testing .......................................................... 38
4.1 Testing steps .............................................................................. 38
4.2 Testing procedure statement ...................................................... 39
4.2.1 Check the appearance of inverter ....................................... 39
4.2.2 Check AC connection ......................................................... 39
4.2.3 Check DC connection ......................................................... 40
4.2.4 Turn on AC circuit breaker .................................................. 41
4.2.5 System self-check and time set-up ..................................... 41
4.2.6 Set up AC operational parameters ...................................... 42
4.2.7 Set up DC operational parameters ..................................... 42
4.2.8 Set up MPPT operational parameters ................................ 43
4.2.9 Turn on DC circuit breaker .................................................. 43
4.2.10 Power train of self-check .................................................. 43
4.2.11 Start up inverter ................................................................ 46
Chapter 5 Operation ............................................................................. 47
5.1 Shut-down and Start-up ............................................................. 47
5.1.1 Shut-down .......................................................................... 47
5.1.2 Start-up ............................................................................... 50
5.2 Operation mode ......................................................................... 51
5.3 Troubleshooting ......................................................................... 54
Chapter 6 Human Machine Interface ................................................... 67
6.1 Description of LCD panel ........................................................... 67
6.2 Operation state .......................................................................... 70
6.3 Interface and menu functions ..................................................... 71
6.3.1 Interface types .................................................................... 71
6.3.2 Main operation interface ..................................................... 74
6.3.3 Operation information ......................................................... 75
6.3.4 Present fault ....................................................................... 76
6.3.5 History ................................................................................ 76
6.3.6 System setup ...................................................................... 78
6.3.7 Power Dispatch .................................................................. 80
6.3.8 System protection parameters setup .................................. 82
Chapter 7 Service and Maintenance.................................................... 86
7.1 Maintenance instruction of filter net ........................................... 86
7.1.1 Maintenance of filter net on the top .................................... 86
7.1.2 Maintenance of filter net at the bottom ............................... 88
7.2 Maintenance of fan tray assembly ......................................... 89
Chapter 8 Technical Data ..................................................................... 91
Chapter 9 Limited Warranty ................................................................. 96
Before You Start…
This manual contains important information regarding installation and safe operation of this unit. Be sure to read this manual carefully before using.
Thanks for choosing this Grid-tied PV Inverter (referred to in this manual as
“PV Inverter”, or simply “Inverter”)
. This Grid PV Inverter is a highly reliable product due to its innovative design and perfect quality control. Such an
Inverter is used in high demand, grid-tied PV systems.
If you encounter any problems during installation or operation of this unit, first check this manual before contacting your local dealer or supplier. Instructions inside this manual will help you solve most installation and operation difficulties.
Please keep this manual on hand for quick reference.
1
Chapter 1 IMPORTANT SAFETY INSTRUCTIONS
(SAVE THESE INSTRUCTIONS)
Please read this user manual carefully before undertaking the installation.
CPS reserves the right to refuse warranty claims for equipment damage if the user fails to install the equipment as per the instructions in this manual.
DANGER:
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING:
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION:
CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE:
NOTICE indicates a hazardous situation which, if not avoided, could result in equipment working abnormally or property loss.
INSTRUCTION:
INSTRUCTION indicates important supplementary information or provides skills or tips that can be used to help you solve a problem or
2
save you time.
Warnings and symbols in this document
Markings on the product
HIGH VOLTAGE:
The product works with high voltages. All work on the product must only be performed as described in this document.
HOT SURFACE:
The equipment is designed to meet international safety standards, but surfaces can become hot during operation. Do not touch the heat sink or peripheral surfaces during or shortly after operation.
EARTH GROUND:
This symbol marks the location of grounding terminal, which must be securely connected to the earth through the PE
(protective earthing) cable to ensure operational safety.
3
DANGER:
Please disconnect the inverter from AC grid and PV modules before opening the equipment. When the PV array is exposed to light, it supplies DC voltage to this equipment. Make sure hazardous high voltage and energy inside the equipment has been discharged.
Do not operate or maintain the inverter until at least 8 minutes after disconnecting all sources from DC and AC sides.
DANGER:
Make sure that equipment is grounded properly. If a ground fault is indicated, the grounding conductors are probably ungrounded and energized.
WARNING:
All the installation and wiring connections should be performed only by qualified technical personnel. Disconnect the inverter from PV modules and the Power Grid before maintaining and operating the equipment.
WARNING:
4
When the connected PV module is exposed to the sunlight, it generates DC voltage and charges the DC bus capacitors of the inverter. Electric charges are still stored in the capacitors even the input of the PV inverter is turned off. Therefore, equipment shall not be maintained until 60 minutes after all inputs are cut off or the
“De-energy” command is carried out successfully.
WARNING:
Shut down the inverter before maintaining the inverter. Disconnect the inverter from PV panels and the Power Grid and make sure there is no electric charge left in the inverter before the maintenance.
CAUTION:
Although designed to meet international safety standards, the
PV-Inverter can become hot during operation. Do not touch the heat sink or peripheral surfaces during or shortly after operation.
NOTICE:
This inverter is designed to connect AC power only to the public grid.
Do not connect the AC output of this equipment directly to any private AC power equipment.
5
NOTICE:
Please choose the type of inverter based on the way of DC grounding system! Change of PV grounding in the inverter is prohibited without permission. Please contact our after-sale service personnel if the change of grounding in the inverter is necessary.
NOTICE:
If the polarity of the DC cables is not correct, the inverter will be damaged.
NOTICE:
Do not install the inverter under direct sunlight to avoid conversion efficiency de-rating caused by excessively high temperature.
NOTICE:
To ensure operational safety, run the initial on-grid testing before operating on the inverter.
INSTRUCTION:
Steel conduits as the cable protector need to be prepared before installation.
6
INSTRUCTION:
If no voltage is detected, check whether the connection from DC source to the inverter is correct. Maybe the combiner boxes are not properly connected or there is a short circuit in the DC cables.
7
Chapter 2 Overview
2.1 Inverter for grid-tied PV systems
CPS SC100KT-O/US-480 inverter can be applied to various commercial rooftop systems and distributed power station systems. Normally, the system mainly consists of PV modules, DC power distribution equipments, PV inverter and AC power distribution equipments (Figure 2-1). The inverter converts the
DC energy from PV modules to the AC energy that is compatible with the public grid. The AC energy can be used directly by the local load, or it can be sold to your energy provider.
DC power
distribution equipments
AC power
distribution equipments
Bidirectional electric meter
AC Grid
Figure 2-1 Grid-tied PV system
2.2 Product type description
CPS SC100KT-O/US-480 is a PV inverter integrated with a low frequency isolation transformer for indoor and outdoor application. The suffix
“US” means that this model of inverter passes the UL and CSA certifications and is
8
specialized for the American market.
2.3 Product features
CPS SC100KT-O/US-480 inverter incorporates the advanced MPPT controlling technology and variable structure modulation strategy to minimize the energy loss.
The design with transformer has the benefit of connecting the inverter to the low-voltage grid more conveniently.
The enclosure of inverter conforms to the NEMA 3R (IP44) protection class, which enables the inverter to be used in the outdoor environment.
Besides, the smart DSP control, complete protection function and advanced thermal design guarantee the inverter with high reliability.
2.4 Inverter circuit structure
The basic schematic diagram of CPS SC100KT-O/US-480 inverter is shown in Figure 2-2. The output of PV modules first passes through DC circuit breaker. The inverter converts DC voltage to 3-phase AC voltage. The 3-phase
AC voltage will be removed of high frequency component by the sine wave filter, then stepped up and isolated by the low frequency transformer and go through AC contactor, AC EMI filter, circuit breaker, at last, be fed to the LV grid.
9
PV+
PV-
=
Inverter
3~
CPS SC100KT-O/US-480
I
PV
U
PV+
U PV-
PWM
SPU
GFDi
RS485
Ia
Ib
Ic
JCC
Ua
Ub
Uc
Figure 2-2 Schematic diagram
2.5 Appearance description
1
4
5
6
2
3
Figure 2-3 Appearance sketch of CPS SC100KT-O/US-480
10
L1
L2
L3
G
RS485+
RS485-
Description of main components (shown in Figure 2-3):
1. Roof Panel
2. Operation buttons and LCD display panel with protection cover
3. Emergency stop button
4. Door lock
5. AC circuit breaker
6. DC circuit breaker
11
Chapter 3 Installation
Below is the installation instruction of the inverter. Please read carefully and install the product step-by-step.
1. CPS SC100KT-O/US-480
Check and make sure that the following items are included in the package before installation, as shown in Table 3-1.
Table 3-1 Main items
Q’ty
Note Item
(1) CPS
SC100KT-O/US-480
Grid-tied PV inverter
1 Grid-tied PV inverter
(2) Accessory kit 1
Contains all necessary accessories
The (2) Accessory kit contains items listed below:
Item
User manual
Table 3-2 Accessories
Q’ty
1
Purpose
Installation and operation
12
Warranty service card
Bottom baffle
Bottom filter
M4 screw
3.1 Basic requirements
1
2
1
8 manual
For maintenance and repair
For air convection
For dust proof
For bottom baffles
NOTICE:
Do not install the inverter under direct sunlight to avoid conversion efficiency de-rating caused by excessively high temperature.
Check and make sure that the ambient temperature of the installation environment is -25
C ~+60
C;
Make sure that the public power grid voltage is 422~528Vac and the grid frequency is 57.0~60.5Hz;
Permission of grid connection has been granted by the local electric power authority;
Installation personnel must be qualified electricians or people who have received professional training;
13
Sufficient convection space;
Away from flammable and explosive substances;
3.2 Checklist of installation tools
The checklist of tools for installation of the product:
Table 3-3
No.
1
2
Name
Spline screwdriver
Phillips head screwdriver
Specification
T25
PH2
Function
For screws on the backboard
For M3 and M4 screws
3
4
Open end wrench
Open end wrench
5 Straight screwdriver
6 Sleeve
7 Torque wrench
0.55 inch
0.67 inch
0.12 inch
0.28 inch
132.74 lb-In.
For M8 screws
For M10 screws
For screws on dry contact
For M4 nuts
For M10 screws
3.3 Mechanical installation
(1) Dimensions
Dimensions of CPS SC100KT-O/US-480 inverter are shown in Figure 3-1.
14
47.24in.
34
.65
in.
Figure 3-1 Sketch of dimensions
There are 2 ways to install the foundation of inverter:
(1) The dimensions of foundation installation for the first way are shown in
Figure 3-2 (a).
Please pay attention to the direction of the 4 fixing plates at the bottom.
15
2.64in.
D=0.63in.
4.33in.
47.24in.
38.58in.
1.97in.
Fixing plate
13.31in.
Figure 3-2 (a) Sketch of foundation installation dimensions
Place the fixing plates inward, as shown in Figure 3-2 (b).
1.97in.
Conduit area
Fixing plate
Figure 3-2 (b) Inward direction to place fixing plates
16
(2) The dimensions of foundation installation for the second way are shown in Figure 3-3 (a).
Please pay attention to the direction of the 4 fixing plates at the bottom.
1.10in.
50.79in.
48.58in.
47.24in.
2.64in.
1.97in.
D=0.63in.
Conduit area
Fixing plate
13.31in.
Figure 3-3 (a) Sketch of foundation installation dimensions
Place the fixing plates outward (Figure 3-3 (b)).
1.97in.
17
Fixing plate
Figure 3-3 (b) Outward direction to place fixing plates
Requirements of inverter installation:
According to the installation dimensions shown in Figure 3-2 (a) and 3-3
(a), secure the inverter on the hard ground or channel steel chassis with M12 foundation bolts through the 8 holes with a diameter of 0.63 inch at the bottom of the equipment.
Front door: A 25.6-inch space should be reserved to ensure that the front door can be opened and closed freely.
Back: A 31.5-inch space should be reserved for maintenance.
The weight of the inverter is approximately 1984.2 pounds. Make sure that the mounting place can bear the weight. Two approaches are recommended to lift the machine, i.e. lifting with a crane or a forklift:
18
Lifting with a crane:
Before lifting the machine, adjust the width of the forklift arm within
16.5~33.5 inches and insert the fork into the bottom of the machine from the back and lift it to the appropriate location for installation as shown in Figure
3-4.
Figure 3-4 Diagram of lifting with a crane
Lifting with a forklift:
Adjust the width of the forklift arm within 16.5~33.5 inches and insert the fork into the bottom of the machine from the back and lift it to the appropriate
19
location for installation as shown in Figure 3-5.
>16.54in.
<33.46in.
Figure 3-5 Diagram of lifting with a forklift
3.4 Electrical installation
Open the front door of the machine. Proceed as shown in Figure 3-6.
1、Turn the handle bar of DC circuit breaker anti-clockwise to horizontal
20
position.
2、Turn the handle bar of AC circuit breaker anti-clockwise to horizontal position.
3、Unlock the door with the key. Pull the lock handle 45 degree outward to open the front door.
1 3 2
Figure 3-6 Diagram of opening front door
4、After opening the front door, remove the transparent Plexiglas cover for wiring. There are two ways to connect the external cables to the inverter: wiring from the bottom and wiring from the left side.
(1) Wiring from the bottom:
There are also 2 ways to connect cables from the bottom of the inverter.
① Routing from rectangular conduit areas:
21
Remove the two bottom covers with a Phillips head screwdriver and connect cables to the inverter through the rectangular conduit areas, as shown in Figure 3-7.
DC bottom cover
AC bottom cover
Figure 3-7 Routing from rectangular conduit areas
② Routing from round holes on the two bottom covers:
(a) Remove the cover screws, put the screws aside, and then take off the two covers;
(b) Punch two holes on the DC bottom cover for DC conduits, as shown in Figure 3-8;
(c) Punch three holes on the AC bottom cover
—one for the communication conduit, one for the AC conduit and one for
22
grounding conduit, as shown in Figure 3-9;
For DC conduit
Figure 3-8 Holes on DC bottom cover
For communication conduit For AC conduit For grounding conduit
Figure 3-9 Holes on AC bottom cover
(d) Install steel connectors on the DC and AC bottom covers and check the seal of the cover;
(e) Connect the steel conduits to these connectors;
23
(f) Restore the two covers to the inverter and attach the screws;
(g) Put the cables through steel conduits to connect to the inverter, as shown in Figure 3-10.
Figure 3-10 Routing from round holes on the two bottom covers
(2) Wiring from the left side:
(a) Remove the screws on the left side cover with a Phillips head screwdriver, put the screws aside, and then take off the cover;
(b) Punch five holes on the left bottom cover for steel conduits, as shown in Figure 3-11;
24
For communica tion conduit
For DC conduit
For AC conduit
For
Grounding conduit
Figure 3-11 Holes on the left side cover
(c) Install steel connectors on the left side cover and check the seal of the cover, as shown in Figure 3-12;
DC
AC
Com.
Grounding
Figure 3-12 Installation of steel connectors
25
(d) Connect the steel conduits to these connectors;
(e) Restore the cover to the inverter and attach the screws;
(f) Put the cables through steel conduits to connect to the inverter, as shown in Figure 3-13;
Figure 3-13 Wiring from the left side
3.4.1 DC connection
(1) To ensure the optimal performance of the inverter, please read the following guidelines before DC connection:
(a) First, make sure that the maximum open circuit voltage of the PV modules is lower than 600Vdc under any conditions;
(b) Ensure that the polarity of DC input is correct, i.e. the positive pole of PV module is connected to the positive pole of the inverter
’s DC
26
input, and the negative pole of PV module is connected to the negative pole of the inverter
’s DC input;
(c) The Max. DC input current of the inverter is 350A, so 2AWG~
3/0AWG copper cables with an insulation rating of 194℉ are recommended for inverter’s DC input. The DC connection requirement is shown in Table 3-4:
Table 3-4
4 strings 3 strings 2 strings
Positive 2AWG(35mm²) 1/0AWG (50 mm²) 3/0AWG (95 mm²)
Negative 2AWG(35mm²) 1/0AWG (50 mm²) 3/0AWG (95 mm²)
(d) Reserve a hole of 11mm diameter on the copper bar. Select the following recommended bolts to tighten the cables, see Table 3-5:
Metric Bolt
American
Bolt
Type
M10
3/8
’
Table 3-5
Length
25mm
1’
Torque Value
24.6N-M (217.4Lb-In.)
24.6N-M (217.4Lb-In.)
INSTRUCTION:
The standard DC configuration is 4 strings. Other configurations are
27
also available by changing corresponding fuses.
The specification of fuses for DC input strings is shown in Table 3-6.
Table 3-6
String Fuse Rated Fuse Rated
Interrupting Rating
# Un(V) In(A)
2 1000 275 150kA
Note
Minimum set
3
4
1000
1000
185
140
150kA
150kA
Minimum set
Default set
The position of DC fuses is shown in Figure 3-14.
Fuse
Figure 3-14 Position of DC fuses
28
(2) Confirm that the input PV modules are of the same specifications and types before connection of DC input;
(3) Connect the DC cable s to the inverter’s copper bar terminals on DC side according to the Table 3-7. In Table 3-6, CPS SC100KT-O/US-480, this type of inverter means that the negative pole of DC input needs to be connected to the Return ground bar and CPS SC100KT-OPG/US-480, this type of inverter means that the positive pole of DC input needs to be connected to the Return ground bar.
Table 3-7
Type of Inverter
CPS SC100KT-O/US-480
Default way of grounding PV -
Negative grounding Return
PV+
Hot
CPS SC100KT-OPG/US-480 Positive grounding Hot Return
NOTICE:
Please choose the type of inverter based on the way of DC grounding system! Change of PV grounding in the inverter is prohibited without permission. Please contact our after-sale service personnel if the change of grounding in the inverter is necessary.
29
Return
PV
–
Return
PV+
Figure 3-15 DC connection of CPS SC100KT-O/US-480
Hot
PV
–
Hot
PV+
Figure 3-16 DC connection of CPS SC100KT-OPG/US-480
30
The two schematic diagrams of wire connection are shown in Figure 3-17.
Outside the inverter
PV+
Hot
PV-
Return
Inside the inverter
GFDI
+ =
~
Negative ground
Outside the inverter
Hot
PV-
PV+
Return
Inside the inverter
GFDI
+
=
~
Positive ground
(a) (b)
Figure 3-17 Schematic diagram on DC side
3.4.2 AC connection
Connect the AC output of PV inverter to the AC cabinet or the power grid:
(1) Use the recommended copper cables with an insulation rating of
194℉. The AC calbe requirement is shown in Table 3-8:
Table 3-8
L1 L2 L3
Wire diameter 2/0AWG (70mm
2
) 2/0AWG (70mm
2
) 2/0AWG (70mm
2
)
Select the following recommended bolts to tighten the cables in Table 3-9:
Metric Bolt
Type
M10
Table 3-9
Length
25mm
31
Torque Value
10N-M (88.5Lb-In.)
American
3/8
’ 1’
10N-M (88.5Lb-In.)
Bolt
(2) Connect the power grid A, B, C cables to the L1, L2, and L3 te rminals of the inverter, as shown in Figure 3-18:
AC output cables
L1 L2 L3
Figure 3-18 AC output connection
(3) Make sure that all cables are well connected on the L1, L2, and L3 terminals.
3.4.3 Ground connection
The ground copper bar is located at the bottom right corner of the inverter, as shown in Figure 3-19.
32
Gnd copper bar
Figure 3-19 Ground connection
Connect the Ground (PE) cable to the Gnd terminal of Gnd copper bar.
The Ground connection requirement is shown in Table 3-10.
Table 3-10
Item
Wire diameter
Nut
Torque value
Gnd (PE)
2AWG (35mm
2
)
M8
12.5N-M (113.5 Lb-In.)
3.4.4 Communication connection
RS485 communication connection:
The signal pinboard on the inverter has 2 RS485 communication ports, which are RS485-1 and RS485-2 for field connections, as shown in Figure
33
3-20.
Figure 3-20 Signal cable terminals for communication
(1) The communication of one single local inverter is to connect the
RS485 communication bus cable through the RS485-1 or RS485-2 port of the inverter directly. Shielded twisted pair (STP) cable should be used for RS485 communication with the maximum allowable length of 3280 feet. Wiring requirement of RS485-1/2 is shown in Table 3-10:
Table 3-11 RS485-1/2 wiring requirement
34
5
6
3
4
7
8
No.
1
2
Color
White orange
Orange
White green
Blue
White blue
Green
White brown
Brown
Function
485+
N.C.
485-
N.C.
N.C.
N.C.
N.C.
N.C.
The wires are labeled 1~8 from left to right, as shown in Figure 3-21:
Figure 3-21 Diagram of RS485-1/2 wiring
(2) For remote monitoring of more inverters, connect the RS485-2 port of one inverter to the RS485-1 port of another inverter and then connect to the
35
data logger through the RS485 communication bus cable. For more information about CPS monitoring solutions, please contact our after-sales service center.
3.4.5 Connection of dry contact
The connection of dry contact is shown in Figure 3-22. The two terminals are potential-free contacts for fault alarming of the inverter. The wiring requirement is shown in Table 3-11.
Figure 3-22 Diagram of Dry contact connection
Table 3-12
Function
Inverter fault alarm
Wire diameter Signal type
18AWG (0.810mm
2
)
Dry contact
(MAX 240VAC 2A)
36
3.4.6 Installation of bottom filter and baffles
After all wire connections are completed, insert the filter into the filter slot at the bottom of the inverter. Then install the front and back baffles with the eight M4 screws (in the accessory pack), as shown in Figure 3-23.
Baffle
Filter
Baffle
Figure 3-23 Diagram of bottom filter and baffles installation
37
Chapter 4 Initial On-grid Testing
To ensure operational safety, initial on-grid testing is required as per the instructions in this chapter before connecting the inverter to PV panels and grid power after the installation of CPS SC100KT-O/US-480.
4.1 Testing steps
Take the following steps for the initial on-grid test:
(1) Check the appearance of inverter
(2) Check AC connection
(3) Check DC connection
(4) Turn on AC circuit breaker
(5) System self-check and time setup
(6) Set up AC operational parameters
(7) Set up DC operational parameters
(8) Set up MPPT operational parameters
(9) Turn on DC circuit breaker
(10) Power train of self-check
(11) Start up inverter
38
INSTRUCTION:
Please refer to “5.3 Troubleshooting” or contact our after-sale service personnel if any problem is found during the testing.
4.2 Testing procedure statement
4.2.1 Check the appearance of inverter
(1) Check whether the inverter has any visible abnormalities. Make sure that the DC and AC circuit breakers are turned off. Open the front door of the inverter and ensure the electrical components and connections are normal.
(2) Check and make sure that all the cables are properly connected and free of defects.
(3) Correct and record any identified problems.
4.2.2 Check AC connection
(1) Check whether the power grid A, B, C, and PE cables are properly torqued on the appropriate L1, L2, L3 and Ground terminals.
(2) Before connecting the inverter to the power grid, measure the line to line voltage between terminals of AC cables. The voltage of L1-L2, L2-L3 and
L3-L1 should be within the range of 422-528Vac.
(3) If abnormal power grid voltage or no voltage is detected, please
39
reconfirm the power transmission from the power grid to the inverter. If there is nothing wrong with the power transmission, check whether the AC connection is correct.
(4) Correct and record any identified problems.
4.2.3 Check DC connection
(1) Check whether the PV cables are properly torqued on the appropriate
DC terminals.
(2) Put through the DC input from PV panels, combiner boxes or other DC distribution equipments and then measure the voltage between Hot and
Return bars.
INSTRUCTION:
If no voltage is detected, check whether the connection from DC source to the inverter is correct. Maybe the combiner boxes are not properly connected or there is a short circuit in the DC cables.
(3) Confirm whether the polarity of DC connection is correct.
NOTICE:
If the polarity of the DC cables is not correct, the inverter will be
40
damaged.
(4) Correct and record any identified problems.
4.2.4 Turn on AC circuit breaker
(1) Close the front door of the inverter.
(2) Turn on the AC circuit breaker. The auxiliary power supply of the inverter will be energized and the control circuit be activated.
(3) Check carefully whether there is any abnormality.
(4) Turn off the AC circuit breaker immediately if there is any abnormality.
Reconfirm whether the previous testing steps are correct. Stop testing if anything abnormal occurs.
4.2.5 System self-check and time set-up
(1) “Sys. Checking” will be indicated on the LCD when the AC circuit breaker is turned on.
(2) The inverter will stand by after the self-check of system (about 30 seconds) is completed. Meanwhile, fault indication interface will be shown on the LCD if any malfunction occurs. The specific fault indication and solution are available to be found in “5.3 Troubleshooting”.
Besides, since the DC circuit breaker is not turned on, the fault
41
“Warn0040” will be indicated on the LCD. Please ignore the fault and keep the
DC circuit breaker in OFF state. (Please don’t turn on the DC circuit breaker until it is allowed in the Chapter 4.2.9).
(3) Enter the “4 SysTime” menu and set up the present date and time according to “6.3.6 System setup”.
4.2.6 Set up AC operational parameters
Enter “1 SysPara” menu according to “6.3.7 System protection parameter setup”.
(1) Check the AC voltage, frequency protection value and time of protection actions.
(2) Change the parameters referring to the “Protection Parameters Table” in Chapter 6.3.7 if necessary.
(3) Record the changed parameters.
4.2.7 Set up DC operational parameters
(1) Check the PV startup voltage and startup time of the inverter.
(2) Change the parameters if necessary.
(3) Record the changed parameters.
42
4.2.8 Set up MPPT operational parameters
(1) Check the active derating and reactive compensation parameters of the inverter;
(2) Set the active power derating to 10%.
(3) Record the changed parameters.
4.2.9 Turn on DC circuit breaker
(1) Turn off the AC circuit breaker.
(2) Turn on the DC circuit breaker to provide the PV power supply to the
DC side of the inverter.
(3) Check carefully whether there is abnormality.
(4) Turn off the DC circuit breaker if there is any abnormality. Reconfirm whether the previous testing steps are correct. Stop testing if anything abnormal occurs.
4.2.10 Power train of self-check
(1) Confirm that the front door of the inverter is closed and locked.
(2) Turn on the AC circuit breaker.
(3) Wait for the inverter to stand by, the status of which will be indicated on the LCD.
43
(4
) Select “2 PowerTrain” on the LCD and press “ENT” according to “6.3.6
System setup”. Then self-check interface will be indicated on the LCD. (Figure
4-1)
After pressing “ENT”, the system begins self-checking. (Figure 4-2)
PowerTrain?
Figure 4-1 Self-check confirmation interface
PowerTrain..
Figure 4-2 System self-checking
(4)
If “Low PV Volt” is indicated on the LCD, as shown in Figure 4-3, check whether the DC connection is correct and whether the DC voltage is below
300V (subject to grid voltage).
44
Low PV Volt
Figure 4-3 Low Volt
(5) If “PowerTrainFualt” is indicated on the LCD, as shown in Figure 4-4, check whether the DC circuit breaker is turned on. Then check whether the inverter is in
“ON State” according to “6.3.6 System setup”. If the fault still occurs when the DC circuit breaker is turned on and the inverter is “ON State”, turn off the AC and DC circuit breakers immediately and then contact our after-sales service personnel.
PowerTrainFault
Figure 4-4 Self-check fails
(6) If the selfcheck is successful, “PowerTrain OK” will be indicated on the LCD, as shown in Figure 4-5. Press ESC to return to the main menu.
45
PowerTrain OK
Figure 4-5 Self-check OK
4.2.11 Start up inverter
(1) If the PV voltage reaches the startup voltage (subject to the grid voltage and 330V is the default minimum voltage.) and the grid voltage meets the requirement of grid connection, the inverter will be energized to start up after 7-15 minutes under stand-by mode. The largest output power is 10% of the rated power. (The active power derating was set to 10%.)
(2)If nothing abnormal happens, the active derating value can be gradually increased to 100%.
(3)Check all the operation information on the LCD.
(4)Turn off the AC and DC circuit breaker or press the “emergency stop button” if anything abnormal occurs.
46
Chapter 5 Operation
NOTICE:
To ensure operational safety, run the initial on-grid testing before operating on the inverter.
5.1 Shut-down and Start-up
5.1.1 Shut-down
Manual shut-down : Normally, manual shutdown is not necessary. But the inverter can be shut down manually for maintenance or user
’s needs.
(1) Move the cursor from the main operation interface to “4 Setting” according to “6.3.6 System setup”. Press ENTER and go to submenu “1
ON/OFF”. The inverter will be shut down and enter “OFF State” after moving the cursor to “OFF” and press ENTER.
(2) Press the “emergency stop button” on the panel to shut down the inverter in case of emergencies.
Then the fault alert “EmergencyStp” will be indicated on the LCD and the inverter will stop working. Once the
“emergency stop button” is restored, the fault alert will be eliminated and the inverter will restart working automatically.
Automatic shut-down: The inverter will be shut down automatically and
47
enter standby mode when the output voltage of PV panel is lower than the set point (300Vdc minimum), or AC power grid fails; or the ambient temperature exceeds the normal range.
The inverter will restart working automatically when the appropriate grid-connection condition is detected.
Manual Shut-down for maintenance: If service personnel need to maintain or repair the inverter, please follow the following steps.
(1) Shut down the inverter according to the manual shut-down steps. Turn off the DC circuit breaker and ensure that the AC circuit breaker is turned on.
(2) Referring to
“6.3.6 System setup”, move the cursor from the main operation interface to
“4 Setting”, press ENTER and go to submenu “6
OtherCmd”. Then move the cursor to “1 De-energy” and press ENTER, as shown in Figure 5-1. After pressing ENTER to confirm, the DC bus capacitor begins to discharge, as shown in Figure 5-2.
De-energy?
Figure 5-1 Inverter de-energy interface
48
De-energy..
Figure 5-2 De-energy ongoing
(3) When “De-energy” is successfully completed (Figure 5-3), press ESC to return to the main menu. Check the PV voltage on the LCD according to
“6.3.3 Operation information” or check the voltage of DC bus capacitor with a voltmeter. Don’t turn off the AC circuit breaker or perform maintenance to the inverter until the DC bus capacitor is discharged to safe voltage, as shown in
Figure 5-3.
De-energy OK
Figure 5-3 De-energy OK interface
(4) If “De-energy” fails, as shown on the LCD in Figure 5-4. It takes at least 60 minutes for the inverter to discharge automatically by turning off the
AC circuit breaker. The inverter should not be maintained until the voltmeter
49
shows that there is no electric charge left in the DC bus capacitor.
InverterErr
Figure 5-4 De-energy error interface
(5) If the DC circuit breaker is not turned off, LCD will remind the user to
“TurnOff DC Break”, as shown in Figure 5-5. Please turn off the DC circuit breaker and press “ENT” to continue discharging.
TurnOff DC Break
Figure 5-5 Turnoff DC circuit breaker
5.1.2 Start-up
Turn on the DC and AC circuit breakers.
Manual start-up: Manual start-up is required after a manual shut-down or a fault shut-down by the user.
Move the cursor from the main operation interface to
“4 Setting” according
50
to
“6.3.6 System setup”. Press ENTER and go to submenu “1 ON/OFF”. Then move the cursor to “ON” and press ENTER to start the inverter. Then the inverter will start up and operate normally if the start-up condition is met.
Otherwise, the inverter stands by.
Automatic start-up
: Confirm that the inverter is “ON State” at first. The inverter will start up automatically when the output voltage (Default value is
330V, which can be adjusted according to
“6.3.6 System setup”.) of PV panel meets the set point, AC power grid is normal, and the ambient temperature is within allowable operating range.
5.2 Operation mode
There are 4 operation modes. The following are corresponding indications for each mode.
(1) System check mode is shown in Figure 5-6:
System is in self check status when inverter is energized. The program will complete initialization during this process.
51
Sys.Checking
>>>>>>
Figure 5-6 System self check ongoing
(2) Standby mode, as shown in Figure 5-7:
After self check is completed, the inverter will turn into standby mode if the output voltage of PV panel, AC power grid or ambient temperature does not meet the startup conditions. But the inverter will continue to check whether the startup conditions are met in standby mode until it comes back to normal operation mode. If the warning SPICommErr occurs and the FAULT LED is blinking, the operation mode shown by LCD may not be correct even if LCD shows
“Standby”. Please refer to the solution of SPICommErr in 5-1
Troubleshooting Table on Page 49.
Standby
>>>>>>
Figure 5-7 Inverter system in standby
(3) Normal operation mode, as shown in Figure 5-8:
52
The inverter will turn from standby into normal operation mode when the startup conditions are met as long as the inverter is “ON State”. In this mode, the inverter converts DC generated by PV modules to AC and feeds the AC to the power grid. Under the normal operation mode, the inverter will maximize the DC output from PV panels in the manner of MPPT (Maximum Power Point
Tracking). Meanwhile, the inverter will check the power grid and PV output voltage constantly. Once anything abnormal occurs, the inverter will stop working and take self-protection.
Figure 5-8 Normal operation mode interface
(4) Fault mode, as shown in Figure 5-9:
The inverter will stop working, disconnect from the power grid and turn into fault mode when the inverter or power grid fails. Check the fault information on the LCD according to
“6.3.4 Present fault” and “6.3.5 History”.
To find the specific cause and solution, you can refer to Table 5-1 in
“5.3
Troubleshooting”.
53
GridV.OutLim
Figure 5-9 Fault indication interface
5.3 Troubleshooting
Before you contact our after-sales service center, you are able to find most faults and solutions in Table 5-1 for the troubleshooting. There are three kinds of fault alert statuses: Warn, Protect and Fault. When there is a “Warn”, the system only reminds customers of the problem while it doesn’t change the operation mode. When there is a “Protect”, the system will turn into fault mode and c ome back to normal when the “Protect” disappears. When there is a
“Fault”, the system will stop working and remain standby until resetting the system or repair the inverter to eliminate the fault.
Two ways of system reset are listed as follows:
1. Turn off the AC circuit breaker, wait for 5 seconds and turn on the AC circuit breaker again to recharge the system control unit. If the system check is passed, the inverter will turn into normal operation mode.
2. Run the “2 Restart” command to reboot the system according to “6.3.7
54
System protection parameter setup”.
The causes of fault can be identified based on the faults listed in Table 5-1.
Please contact our after-sales service if the fault still exists.
WARNING:
Shut down the inverter before maintaining the inverter. Disconnect the inverter from PV panels and the Power Grid and make sure there is no electric charge left in the inverter before the maintenance.
55
Table 5-1 Troubleshooting Table
Warn
Definition:
Communication inside inverter fails
Possible causes:
1. Communication circuits inside inverter are loose;
2. LCD software problem;
1. SPICommErr
3. Inverter software problem;
2. Warn0010
Recommended solutions:
1. Observe for 5 minutes and see whether the alarm will be eliminated automatically;
2. Turn off 3-phase working power supply and then reboot the system;
3. Contact our after-sales service center.
Definition:
Fan (invisible from outside) inside inverter is working abnormally
56
3. Warn0030
Possible causes:
1. Fan is blocked;
2. Power supply circuit of the fan has problem;
3. Fan state test circuit is loose;
4. Fan service life has expired;
5. Inverter software problem
Recommended solutions:
1. Observe for 5 minutes and see whether the alarm will be eliminated automatically;
2. Switch off 3-phase working power supply and then reboot the system;
3. Contact our after-sales service center.
Definition:
Eeprom error
Possible causes:
Internal storage error
Recommended solutions:
1. Observe for 5 minutes and see whether the
57
4. Warn0040
5. Warn0050 alarm will be eliminated automatically;
2. Contact our after-sales service center
Definition:
DC circuit breaker error
Possible causes:
1. PV positive pole and negative pole are connected reversely;
2. PV over-current;
3. DC breaker is damaged;
4. DC circuit breaker is turned off
Recommended solutions:
1. Observe for 5 minutes and see whether the alarm will be eliminated automatically;
2. Check DC breaker;
3. Check PV cable connection;
4. Check whether the sunlight is too strong or the configuration of PV panel is appropriate;
5. Contact our after-sales service center
Definition:
58
Temperature sensor error
Possible causes:
1. Temperature inside inverter exceeds normal range;
2. Temperature sensor has problem
Recommended solutions:
1. Observe for 5 minutes and see whether the alarm will be eliminated automatically;
2. Check whether the operation temperature is
﹣25℃~60℃;
3. Contact our after-sales service center
Definition:
Inside warning
Possible causes:
6.
Warn0010~0150
Inverter has inside problem
Recommended solutions:
1. Observe for 5 minutes and see whether the alarm will be eliminated automatically;
59
Protect 1. TempOver
2. Contact our after-sales service center
Definition:
Ambient temperature or temperature inside inverter is too high
Possible causes:
1. Ambient temperature outside the inverter is too high;
2. Radiation air inlet is blocked; Too much dust is on the filter net;
3. Radiation fan is blocked without rotation
Recommended solutions:
1. Confirm that external ambient temperature is within the specified range of operating temperature;
2. Check whether radiation air inlet is blocked and filter net has too much dust;
3. Whether radiation fan is blocked;
4. Observe for 30 minutes and see whether the alarm will be eliminated automatically;
60
5. Contact our after-sales service center
Definition:
Grid voltage exceeds the allowable range, or power grid is not detected
Possible causes:
1. Grid voltage is abnormal;
2. Power grid breaks down;
3. Cable connection between the inverter and the grid is disconnected;
2. GridV.OutLim 4. Inverter has an internal fault
Recommended solutions:
1. Observe for 10 minutes and see whether the alarm will be eliminated automatically;
2. Check whether the grid voltage is within the allowable range;
3. Check whether the cable connection to the grid is disconnected or abnormal;
4. Contact our after-sales service center
3. GridF.OutLim Definition:
61
Grid voltage frequency is abnormal, or grid is not detected
Possible causes:
1. Grid frequency is abnormal;
2. Power grid breaks down;
3. Cable connection between the inverter and the grid is disconnected;
4. Inverter has an internal fault
Recommended solutions:
1. Observe for 10 minutes and see whether the alarm will be eliminated automatically;
2. Check whether the grid frequency is within the allowable range;
3. Check whether the cable connection to the grid is disconnected or abnormal;
4. Contact our after-sales service center
4. PV.VoltOver
Definition:
PV voltage exceeds the allowable value
Possible causes:
62
5. PV.Reverse
1. PV over-voltage
2. Inverter has an internal fault
Recommended solutions:
1. Observe for 30 minutes and see whether the alarm will be eliminated automatically;
2. Check whether PV voltage exceeds the allowable range;
3. Disconnect from PV input, wait for 5 minutes and reconnect to PV input;
4. Contact our after-sales service center
Definition:
PV panel is connected reversely
Possible causes:
1. PV positive pole and negative pole are connected reversely;
2. Inverter has an internal fault
Recommended solutions:
1. Check whether positive pole and negative pole are connected reversely;
63
6. AC.ContErr
2. Contact our after-sales service center
Definition:
AC contactor is abnormal
Possible causes:
1. AC contactor is damaged;
2. Inverter has an internal fault
Recommended solutions:
Contact our after-sales service center
Definition:
Inverter is in the status of emergent stop
Possible causes:
1. Emergency stop button is pressed
7. EmergencyStp
2. Inverter has an internal fault
Recommended solutions:
1. Check whether emergency stop button is pressed. If so, restore the button;
2. Contact our after-sales service center if the problem still exists
64
Definition:
Grounding fault
Possible causes:
1. Ground connection inside inverter is abnormal
2. Inverter has an internal fault
8. GFDIErr
Recommended solutions:
1. Check whether the system has ground connection or grounding fault;
2. Check whether the LED on GFDI is lighted on. If so, replace with a new fuse;
3. Contact our after-sales service center
Definition:
Internal protection of inverter
9. Possible causes:
Protect0010~0620 Internal protection of inverter
Recommended solutions:
1. Observe for 10 minutes and see whether the
65
Fault alarm will be eliminated automatically;
2. Contact our after-sales service center
Definition:
Fault inside inverter
Possible causes:
Serious fault occurs inside inverter
Fault0010~0160
Recommended solutions:
1. The inverter can be restarted referring to
“6.3.7 System protection parameters setup” if it is confirmed that there is no other problem;
2. Contact our after-sales service center
66
Chapter 6 Human Machine Interface
6.1 Description of LCD panel
The CPS SC100KT-O/US-480 LCD panel is protected with a cover which can be opened by switching the cover lock to the right, as shown in Figure 6-1.
Figure 6-1 Switch the cover lock
67
The LCD panel consists of LCD screen, LED lights, buzzer and 6 keys, as shown in Figure 6-2.
Figure 6-2 LCD panel
Different LED statuses are described in Table 6-1 and key functions are listed in Table 6-2.
Table 6-1 LED Indication
LED
Sign
Description State Status
POWER
Work power supply indicator light
Light up
Energized (control panel starts to work)
68
Light off No working power supply
Light up
In grid connection and power generation state
RUN
Grid connection operation indicator light
Blink
Derated running state (light up 0.5s, light off 1.6s)
Light off
In other operation state or no working power supply
GRID
Grid state indicator light
Light up
Blink
Grid is normal
Grid abnormal (light up
0.5s, light off 1.6s)
Light off No working power supply
FAULT
Light up Fault occurs
Slow Alarm occurs (light up 0.5s, blink light off 2s)
Fault state indicator light
Quick blink
Light off
Protective action (light up
0.5s, light off 0.5s)
No fault or no working power supply
69
Table 6-2 Definitions of the keys
Key Description Definition of function
Escape
Enter
Back/end/mute
Confirm entering the menu
/Confirm set point
Up
Down
Left
6.2 Operation state
Right
Page up in selection menu
Page down in selection menu
-1 when setting parameters
+1 when setting parameters
Table 6-1 indicates the definitions of LED, i.e. indicates the information of the inverter’s operation state. It indicates that the system is energized and under DSP control when “POWER” lights up.
“RUN” will light up when the inverter detects that the grid connection conditions meet the requirements and power is fed to the grid. “RUN” will blink
70
if the grid is in derated running state during the period of feeding power to the grid.
“GRID” will light up when the grid is normal during the operation of the inverter. Otherwise, “GRID” will blink until the grid restores to normal.
“FAULT” will blink quickly as a fault (except grid abnormality) occurs.
“FAULT” will not light off until the fault is eliminated. The light will blink slowly when an alarm occurs. “FAULT” keeps lighting up when an internal fault occurs.
“FAULT” will not light up if both the inverter and grid are normal.
The buzzer will give alarms if a fault (power grid abnormality included) occurs.
6.3 Interface and menu functions
Users can perform the corresponding operations with the 6 function keys according to the indications of the LCD.
6.3.1 Interface types
(1) The LCD interface starts with the company logo once the system is energized, as shown in Figure 6-3.
71
Figure 6-3 LOGO interface
(2) Indication of inverter operation mode:
Sys.Checking
>>>>>>
Figure 6-4 Inverter system check ongoing
Standby
>>>>>>
Figure 6-5 Inverter system in standby mode
72
PV
420 V
48.7 A
=
~
06/07 12:09:01
479
19.8
VAC kW
78.5
kwh
Figure 6-6 Default display interface for normal operation
GridV.OutLim
Figure 6-7 Fault indication interface
LCD screen will display different mode interfaces based on the operation modes of the inverter. There are four operation modes: startup system check mode (as shown in Figure 6-4), stand-by mode (as shown in Figure 6-5), normal operation mode (as shown in Figure 6-6) and fault mode (as shown in
Figure 6-7).
The default indication interface mainly indicates PV voltage, PV current,
Grid voltage, instant power, daily generated power and time information under normal operation.
The present fault information will be indicated on the LCD screen when
73
the inverter is in fault mode.
6.3.2 Main operation interface
LCD screen displays “default indication interface” when the inverter is in operation mode. Press the ESC key in this interface to escape the default interface and enter the main operation interface. The main operation interface is shown in Figure 6-8.
1 OP.Info
2 Alarm
3 History
4 Setting
→5 Dispatch
Figure 6-8 Contents indicated on the main operation interface
The main operation interface of LCD screen has 5 menus, i.e. “1 OP. Info”,
“2 Alarm”, “3 History”, “4 Setting” and ”5 Dispatch”. The users may select options with PAGEUP and PAGEDOWN, and then press ENTER to confirm selection. The users can return to the default indication interface by pressing the ESC key.
74
6.3.3 Operation information
When the cursor moves to “1 OP. Info” in the main interface, press
ENTER to select the operation information as shown in Figure 6-9. Check the information by pressing PAGEUP and PAGEDOWN. Return to the previous menu and enter the main operation interface by pressing ESC.
1 OP.Info
Yield 23.5kWh
MPac 20.0kW
Pac 19.8kW
RunT 12 .1 h
Uab 480.0V
Ubc 478.9V
Uca 479.5V
Freq 60.0Hz
Ia 22.7A
Ib 22.7A
Ic 22.7A
Tmod 78.2C
Tamb 50 C
Upv 420.0V
Ipv 48.7A
Figure 6-9 Operation information indication
75
6.3.4 Present fault
As described before, when faults occur during the normal operation of the inverter, corresponding fault message will be indicated in “2 Alarm” menu besides the sound and light alarms. Move the cursor to “2 Alarm” and press
ENTER to check out the specific fault information, as shown in Figure 6-10.
2 Alarm
If not existed
No Alarm existed
SPICommErr
IntProtectA
…
Figure 6-10 Present fault information
6.3.5 History
Move the cursor to “3 History” in the main interface. Press ENTER to check the history information, as shown in Figure 6-11. There are 4 submenus in “3 History” : “1 HistErr”, “2 OP. Recd”, “3 Version” and “4 TotalTag”.
(1) UP to 100 pieces of latest fault messages can be recorded and found in “1 HistErr” menu.
(2) The latest 21 days’ operation history data is available to be found in “2
OP. Recd” menu. All variable names in the data comply with the content in “1
76
OP. Info” menu of the main interface. The users can select the “2 OP. Recd” menu and input the retraceable days (For example, the input number is 21. If the current date is December 15th, the LCD will indicate the operation information of 21 days before that date which is November 24th).
(3) Software version, hardware version and serial number of the product are listed in “3 Version” menu.
(4) Cumulative generated power since the first day the inverter began working is available to be found in “4 TotalTag” menu.
If not existed
NoError
3 History
1 HistErr
2 OP.Recd
3 Version
→4 TotalTag
Existed
1.St2010.12.15 20:50
SPICommErr
2.Ed2010.12.15 20:59
SPICommErr
…
Pls input date
←2→ ß—12/15
RunT 6.3 h
MPac 20.0KW
Yield 123.5KWh
MachVer
1.00
SerialNo
11010101010101
T- Yield (kWH)
152123.5
Figure 6-11 History menu and submenu
77
6.3.6 System setup
Move the cursor to “4 Setting” in the main interface. Press ENTER to set the current system parameters, as shown in Figure 6-12. There are 6 submenu s in “4 Setting” : “1 ON/OFF”, “2 Language”, “3 Buzzer”, “4 SysTime”,
“5 Commun” and “6 OtherCmd”.
(1) The inverter can be started and shut down with “1 ON/OFF” menu.
Move the cursor to “ON” and press ENTER, “ON State” will then be indicated at the bottom of LCD screen
; move the cursor to “OFF” and press ENTER, then “OFF State” will be indicated as well. The inverter will stand by instead of working normally if the startup conditions are not satisfied even “ON” is selected. The inverter will be shut down i mmediately if “OFF” is selected in any cases.
(2) Two languages, i.e. English and Chinese are available in “2 Language” menu.
(3) Key beep and fault beep can be set mute/unmute in “3 Buzzer” menu.
“Key beep” and “Alarm beep” can be shifted by pressing PAGEUP and
PAGEDOWN. Shift between “Enable” and “Disable” by pressing LEFT and
Right if the cursor is on the “Key beep”. Complete the setup by pressing
ENTER. Similarly, the fault beep can be set up as well.
78
(4) Set up the system date and time with “4 SysTime” menu. (These parameters are of critical importance and will be used in history information).
Select year, month, day, hour and minute by pressing PAGEUP and
PAGEDOWN, and set up the specific date and time by pressing LEFT and
RIGHT.
(5) Set the 485 communication parameters with “5 Commun.” menu.
(6)
In “6 OtherCmd” menu, run “1 De-energy” to discharge the electric charges of DC capacitor quickly; run “2 PowerTrain” to check the status of main system circuit for the initial on-grid testing.
79
4 Setting
1 ON/OFF
2 Language
3 Buzzer
→4 SysTime
5 Commun
6 OtherCmd
→ ON
OFF
ON State
中文
→ English
EnglishVer
KeyBeep
Enabled
AlarmBeep
→ Disabled
↓
2009 / 12 / 15
21 :14
→ Address 2
BaudRate 3
1 2400 2 4800
3 9600 4 115200
→ 1 De-energy
2 PowerTrain
Figure 6-12 System setup menu and submenu
6.3.7 Power Dispatch
“ActivePower” and “PowerFactor” parameters can be set up through LCD
80
operations as well as remote control by software.
Local dispatch order: Service personnel can adjust the “ActivePower” and
“PowerFactor” parameters through LCD operations. For detailed setup steps, please refer to “6.3.8 System protection parameters setup”.
The current parameters of “ActivePower” and “PowerFactor” can be checked by the following steps.
Move the cu rsor to “5 Dispatch” in the main interface, as shown in Figure
6-13:
1 OP.Info
2 Alarm
3 History
4 Setting
→5 Dispatch
Figure 6-13 Contents indicated on the main operation interface
81
Press ENTER to the interface shown in Figure 6-14.
ActivePower(%)
100.0
PowerFactor
1.000
Figure 6-14 Parameters of power dispatch
Remote dispatch method: The “ActivePower” and “PowerFactor” parameters can be adjusted through remote monitoring software. For detailed information, please refer to the manual of our monitoring system products.
6.3.8 System protection parameters setup
By pressing PAGEDOWN and ENTER at the same time in the main interface and entering the password
(PAGEUP->PAGEDOWN->RIGHT->LEFT), the system parameter setup menu is accessed. This menu includes 4 submenus
: “1 SysPara”, “2 Restart”, “3
Recover” and “4 ClrErrRecd”, as shown in Figure 6-15.
(1)
“1 SysPara” menu: Set up the system protection parameters in “1
SysPara” menu. The specification of protection parameters is shown in Table
6-3.
82
Table 6-3 Protection Parameters Table
No.
Description of parameter
1
Grid voltage upper limit (V)
LCD indication
GridV.Max(V)
2
3
Trip time under
Max. voltage (S)
GridVmaxTripT(S)
Grid votage lower limit (V)
GridV.Min(V)
Setup range (lower limit, default & upper limit)
(527, 527, 575)
(0.16, 0.16, 1.00)
(240, 421, 421)
4
5
Trip time under
Max. voltage (S)
GridVminTripT(S)
Grid frequency lower limit (Hz)
GridF.Min(Hz)
(0.16, 0.16, 2.00)
(57.00, 59.30, 59.80)
6
Frequency trip time
(S)
7
8
Active power derating (%)
Reactive
GridFTripT(S)
PowerDerating
(%)
ReactiveComp
(0.16, 0.16, 300.00)
(10%, 100%, 100%)
(-0.900, 1.000, 0.900)
83
No.
Description of parameter
LCD indication
Setup range (lower limit, default & upper limit)
Compensation
9 PV start voltage (V) PVStartVol(V)
(300, 330, 600)
10 Time delay (Min) Tdelay(Min)
(0.1, 5.0, 5.0)
(2)
“2 Restart” menu: If the inverter stops working as a result of a severe fault inside the inverter. The user may perform a force restart by the options in
“2 Restart” menu. Note that this function is effective for the inverter to restore to normal operation only when the Fault0010~0160 in the troubleshooting table occurs. This function will not respond when the inverter is in normal operation mode and a “FaultOperated” alarm will be indicated on the LCD screen.
(3) “3 Recover” menu: The manufacturer’s parameter default value can be recovered when the inverter is not in operation mode. Otherwise, a
“FaultOperated” alarm will be indicated.
(4)
“4 ClrErrRecd” menu: History information of the faults can be cleared.
A confirmation is required to clear the records.
84
GridV.Max(V)
→ 527
GridVmaxTripT(S)
0.16
Pls Input Pwd
****
Pwd Error
Pls Input Again
****
Wrong Password
→1 SysPara
2 Restart
3 Recover
4 ClrErrRecd
GridV.Min(V)
→ 421
GridVminTripT(S)
0.16
GridF.Max(Hz)
→ 59.30
GridFTripT(S)
0.16
Are You Sure?
Initialization?
FaultOperated
Restarting..
Success
Success !
Failure
Failure!
Recovering..
Succes s
Success !
Failure
Failure!
ClearErrors?
Success !
FaultOperated
Figure 6-15 System parameter setup
85
Chapter 7 Service and Maintenance
The following regular maintenance steps should be carried out at regular intervals to ensure the inverter’s operation with optimal performance.
CAUTION:
Although designed to meet international safety standards, the
PV-Inverter can become hot during operation. Do not touch the heat sink or peripheral surfaces during or shortly after operation.
7.1 Maintenance instruction of filter net
7.1.1 Maintenance of filter net on the top
WARNING:
Shut down the inverter before maintaining the inverter. Disconnect the inverter from PV panels and the Power Grid and make sure there is no electric charge left in the inverter before the maintenance.
Disassemble the filter net on the top as follows:
(1) Remove the M3 screws in the middle of the filter net with a PH2 Phillips head screwdriver and take off the fixing plate.
86
(2) Push aside the two clips on both sides and disassemble the filter net.
(3) Clean the filter net and put it back or replace with a new one and then reinstall the fixing plate.
Fixing plate
Push aside the clips on both sides
Filter net
Figure 7-1 Disassembling filter net on the top
87
WARNING:
Shut down the inverter before maintaining the inverter. Disconnect the inverter from PV panels and the Power Grid and make sure there is no electric charge left in the inverter before the maintenance.
7.1.2 Maintenance of filter net at the bottom
(1) Remove the four M4 screws on the baffle at the bottom of inverter with a
T25 spline screwdriver and then take off the baffle.
(2) Pull out the filter net from the bottom of the inverter, as shown in Figure 7-2.
Figure 7-2 Pulling out filter net at the bottom
(4) Clean the filter net, put it back or replace with a new one and then reinstall
88
the baffle.
WARNING:
Shut down the inverter before maintaining the inverter. Disconnect the inverter from PV panels and the Power Grid and make sure there is no electric charge left in the inverter before the maintenance.
7.2 Maintenance of fan tray assembly
(1) Remove the eight M5 screws on the top of inverter with a T25 spline screwdriver and then take off the cover, as shown in Figure 7-3.
Figure 7-3 Disassembling of top cover
89
(2) Disconnect the buckle on the fan tray, remove the screws on the fan tray, unplug the power supply connector and then take off the fan tray assembly, as shown in Figure 7-4.
Figure 7-4 Disassembling of fan tray assembly
(3) Clean the fan tray assembly, put it back or replace with a new one and then reinstall the fan tray assembly and top cover.
90
Chapter 8 Technical Data
Model Name
DC Input
Max. PV Power
Nominal DC Input
Power
Max. DC Input
Voltage
Operating DC Input
Voltage Range
Start-up DC Input
Voltage / Power
Nominal DC Input
Voltage
Number of MPP
Trackers
CPS
SC100KT-O/US-480
CPS
SC100KT-OPG/US-480
135kW
105kW
600Vdc
300-600Vdc
330Vdc/700W
430Vdc
1
91
MPPT Voltage
Range
Max. Input Current
Number of DC Inputs and Fuses
Grounding
DC Disconnection
Type
AC Output
Rated AC Output
Power
Max. AC Output
Power
Rated Output Voltage
Output Voltage
Range
Grid Connection
Type
Negative
330-500Vdc
350A
4
Breaker
100kW
480Vac
422-528Vac
3
100kW
/ PE
Positive
92
Max AC Output
Current
Rated Output
Frequency
Output Frequency
Range
Power Factor
Current THD
AC Disconnection
Type
System
Topology
Max. Efficiency
CEC Efficiency
Stand-by / Night
Consumption
Environment
Protection Degree
93
Transformer
96.8%
96.0%
<50W / <40W
NEMA 3R
120A
60Hz
59.3-60.5Hz
>0.99
<3%
Breaker
Cooling
Operating
Temperature Range
Variable speed cooling fans
-4°F to +140°F / - 20°C to +60°C (derating from
+50°C / +122°F)
Operating Humidity
Operating Altitude
0-95%, non-condensing
6562ft / 2000m (derating from 4921.3ft / 1500m)
Display and Communication
Display LCD + LED
RS485 Communication
Mechanical Data
Dimensions (WxHxD)
Weight
47.2x72.8x34.6in / 1200x1850x880mm
1984lbs / 900kg
Safety
Safety and EMC UL1741:2010, CSA-C22.2 NO.107.1-01, FCC
PART15 Standard
Grid Standard IEEE1547:2003, IEEE1547.1:2005
*Note 1
: Exceeding the rated voltage shown in “Max. DC Input Voltage” may cause permanent damage to the equipment.
**Note 2:
“Allowable Grid Voltage” and “Rated Output Frequency” depend on the specific national grid standard.
94
***Note 3: When the ambient temperature exceeds 50℃ (122℉), the maximum output power will derate as 3% per ℃/1.8℉. When the ambient temperature reaches 60℃ (140℉), the maximum output power will be 70% of the rated output power. The inverter will stop working under self-protection when the ambient temperature is over 65℃ (149℉).
95
Chapter 9 Limited Warranty
The warranty policy of this product is specified in the contract; otherwise, the warranty period is 5 years.
For service, Chint Power Systems America will provide local support. For
Warranty terms, please refer to the CPS America standard warranty policy in place at time of purchase.
96
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project