Product description - AL MAZROUI Advanced Technology


Digital Energy

Product description

Digital Energy™ Uninterruptible Power Supply

GT Series UPS

6 & 10 kVA

imagination at work


1 Introduction........................................…………………..………………...........3

2 Functional explanation.....................................................................3

2.1 Principles of operation

2.2 Normal conditions

2.3 Mains failure

2.4 Bypass operation

3 External description...............………………………………………................6

3.1 Front and rear panel

3.2 Enclosure

3.3 Dimensions

3.4 Weight

4 Electrical specifications....………………………………………….……….….8

4.1 Ratings

4.2 Input converter

4.3 Output converter

4.4 Bypass

4.5 General design criteria

5 Performance characteristics...............………………….....................9

5.1 Efficiency

5.2 Environment

5.3 Overload capability

6 Batteries……………………………………..……………………………………………..10

6.1 General

6.2 Runtimes

7 Standard features....................….....................................................11

8 Communication ports......................................…..........……………...12

8.1 DB9 Communication Port

8.2 SNMP Interface Card

9 Options.................…….............................................……………...............12

9.1 SNMP Interface Card

9.2 Parallel option

9.3 Extended runtimes

10 Transport / storage...............................…..................………………....13

© General Electric. Data subject to change without prior notice.

All brands and product names are Trademarks or Registered Trademarks of their respective owners.

Reproduction only upon written consent by GE.

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GE Digital Energy GT – 6000_10000 UPS

1 - Introduction

The GT Series is a transformer-less true VFI (Voltage & Frequency Independent) on-line double conversion and high-performance UPS to provide protection for your electrical equipment.

The GT Series is easy to install and service, and has been designed for maximum site flexibility. The UPS can be used as an upright, floor-standing “tower” model or mounted in a 19inch rack. All required items for either use (support stands, rack mount brackets) are packed with the UPS.

Each GE Digital Energy UPS is thoroughly tested and conforms within tolerance to the following specifications. (Data are mean values and are subject to change without notice.) Information applies to all models unless otherwise specified.

2 - Functional explanation

2.1 Principles of operation

The UPS stores electric energy in batteries, which are in a separate cabinet. This allows the UPS to supply output power when the incoming mains power is cut off completely. Energy is stored as Direct

Current (DC), while input and output energy are Alternating Current (AC) in sine wave form. Therefore the

UPS contains an input converter (AC to DC) and an output converter (DC to AC) (See fig.1).

The GT Series UPS is a true on line double conversion UPS with: input converter with power factor correction and extremely wide input voltage/frequency range and no inrush current at start up back feed protection for safe operation and easy installation battery management system to optimizing battery charging and enhancing battery life output converter which can be extended up to 3 units in parallel

Bypass consisting of combined relay and static switch to minimize switch over time and optimizes output availability

Figure 1 Block diagram of the GT Series CE 6-10 KVA UPS, mains present

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GE Digital Energy GT – 6000_10000 UPS

2.2 Normal conditions

Under normal input conditions (see section 4.2) energy from the mains is channeled through the input converter, which supplies the output converter and, together with the battery charger, keeps the battery fully charged. Surges and spikes are blocked completely at the input converter and very unstable mains can be supported. The output converter synthesizes a completely new AC output sine wave to supply the load (electrical equipment).

2.3 Mains failure

In the event of a mains power failure (i.e. mains absent or outside tolerance) the output converter uses the energy reserve stored in the battery to continue to produce AC power, ensuring unbroken output

(fig. 2).

No interruption or alteration will ever be noticed in the output power.

Figure 2

Block diagram of the GT Series CE 6-10 KVA UPS, mains failure

In the event of an extended mains failure, the output converter will stop when the battery energy has been used up. At this point, the UPS is no longer able to power the connected equipment.

When the mains is re-established within tolerance, the input converter will be supplied again by the mains and the batteries will be recharged, making them ready to support future power failures.

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GE Digital Energy GT – 6000_10000 UPS

2.4 Bypass operation

The UPS is equipped with an automatic bypass switch. This switch automatically transfers the load to the mains if the UPS is unable to deliver the demanded output power due to overload or overtemperature. If all 5 load LED’s are illuminated, bypass operation is caused by an overload. If only first load LED is illuminated, bypass operation is caused by over-temperature.

The UPS will switch back to normal operation when the overload has been removed or the temperature has dropped below alarm level.

Figure 3 Bypass Operation

The static bypass transfer time is typically 0.5 msec and is sufficiently short for modern computers, which can ride through 10-20 milliseconds:

If a power failure occurs during bypass operation, the UPS will switch to battery if possible, otherwise output power is lost

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GE Digital Energy GT – 6000_10000 UPS

3 – External description

3.1 Front and rear panel


Figure 4: Front panel GT Series 6 & 10 kVA UPS, rackmount orientation

Figure 4.1: Operating panel

Switch / LED

1 - ‘OFF’ switch

2 - ‘ON’ switch

3 - LED ‘mains available’

4 - LED ‘on battery’

5 - LED ‘operation’

main function switches the UPS to bypass, to stand-by or off (see section 4.4.9 of the

Operating manual) switches on the UPS, starts quick battery test (see section 4.5 of the

Operating manual) indicates availability of power mains on in case of battery operation: the mains power fails, and the internal batteries supply the required power until either they are depleted or mains power returns. on when the UPS is operating.

Blinks if the UPS is in standby mode

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GE Digital Energy GT – 6000_10000 UPS

6 - LED ‘on bypass’ on when the UPS operates in bypass mode: the incoming mains power is channeled directly to the load.

Blinks if the input voltage is out of bypass tolerance (see section 4.4.4 of the

Operating manual)

7 - LED ‘alarm’ on in case of an alarm

8 - LED bar ‘runtime capacity’ the remaining available battery runtime for the actual load, in % of the maximum runtime with the actual load

9 - LED bar ‘load’ indicates to what extent the output capacity of the UPS is used by the actual load. In case of overload all LED s will be on.

As this is an abnormal situation the alarm LED will blink as well.


Figure 5: Rear panel GT Series 6 & 10 kVA UPS & EBM, rackmount orientation

UPS module





: Output socket(s), Type IEC 320 C19 (16A)

: Output circuit breaker

: Input circuit breaker

- 2 pole, 30A/250Vac - 6kVA

- 2 pole, 63A/250Vac - 10kVA

: Fan







Battery module


: Paralleling Port

: SNMP Card slot

: RPO contacts

: UPS interface COM A

: Battery connection

: Mains connection

: Battery extension cable socket. Connection to UPS or another External Battery Module (EBM).

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GE Digital Energy GT – 6000_10000 UPS

GT Series model

3.2 Enclosure




3.3 Dimensions

Dimension UPS tower (hxwxd, mm

Dimension battery pack (hxwxd, mm)

Shipping dimension (hxwxd, mm) :

Shipping dimension batt. pack (hxwxd, mm) :



3.4 Weight

Weight UPS (kg)

Shipping weight UPS (kg)

Weight battery pack (kg)

Shipping weight batt. pack (kg)









4 - Electrical specifications

4.1 Ratings

Voltage Amperes (VA) with computer type load

Watts (W) with resistive load

Input thermal circuit breaker (A)

Internal Input fuse 250V, slow (A)

4.2 Input converter

AC input voltage

AC input voltage range

Minimum start-up AC voltage

Input current waveform

Input current (A) at nominal input voltage

Input Current distortion (THDi)

Input power factor

Input frequency range

Inrush current

4.3 Output converter

AC output voltage

AC output voltage tolerance

Output frequency

Output frequency range























30 steel/plastic

RAL 9005 (black)

IP 20

130 (3U)x410x660

130 (3U)x410x660













Nominal 230 V

84 - 276 V

(84-175V with load de-rating for 30% to 100% load)

Input >276 Vac: UPS switches to battery operation

Input > 176Vac. (UPS with load de-rating) sine wave

20.6 34.6

5% (Typical)

> 0.97

40 - 70 Hz

60 A

220 / 230 / 240 V (selectable)

± 2%

50/60 Hz, auto selection nominal ± 5% with mains synchronizing

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GE Digital Energy GT – 6000_10000 UPS

Output waveform

Harmonic distortion

Power factor

Crest factor (peak to RMS current)

Capacity appliance outlets

4.4 Bypass

AC input voltage range

Frequency tracking rate

Frequency tracking range

Typical transfer time, msec

4.5 General design criteria


Electromagnetic compatibility







: sine wave

: < 3% with linear load, < 8% with non-linear full load

: 0.7

: ≤3:1

: with 55A Terminal Block

±10% from output voltage


± 5% of selected frequency


EN 62040-1

EN 62040-2 (2006)

5 - Performance characteristics

5.1 Efficiency (battery fully charged)

Efficiency (%) on mains

- 25% load

- 50% load

- 75% load

- 100% load

5.2 Environment

Ambient temperature

Audible noise at 1 meter

Max. relative humidity

5.3 Overload capability

Overload protection

Overload behavior:

- battery operation









: Fully protected against overload and short circuits.







0 to +40ºC

< 55 dB(A), load and temperature dependent

90% (non-condensing)

125% during 1 minute

150% during 10 seconds

>150% less than 2 seconds

- bypass operation : depends on rating of thermal circuit breaker; typical

125% of TCB value: for 50 ~ 700 seconds

200% of TCB value: for 10 ~ 150


300% of TCB value: for 3 ~ 40 seconds

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GE Digital Energy GT – 6000_10000 UPS

6 - Batteries (ratings given for 25°C)

6.1 General

Nominal voltage (Vdc)

Number / Ah batteries

(in batt. kit and ext. batt. pack)


Service life

Recharge current

End of battery discharge Voltage (Vdc)

Battery recharge time

Long term storage










20pcs / 8Ah sealed lead acid, maintenance free up to 5 years (depending on use)

1.2 A


5 hours for 90% capacity see chapter 10

6.2 Runtimes

In the standard configuration, 1 battery pack is connected to the UPS module. Additionally, a maximum of 2 battery packs can be added to the standard configuration to extend the runtime. Additional battery packs are available in 240V/8Ah and have the same dimensions as the UPS module.

The following table shows runtimes with up to 3 Battery Packs. 1 Battery Pack is the normal configuration.





10% 149 min 305 min 460 min

GT 6000

GT 10000









62 min

29 min

17 min

12 min

90 min

35 min

15 min

8 min

130 min

64 min

41 min

29 min

187 min

77 min

36 min

22 min

199 min

99 min

65 min

47 min

284 min

119 min

58 min

37 min

100% 5 min 15 min 26 min

7 – Standard features

Wide AC input voltage window

Minimizes need for battery operation

High voltage protection

Above the maximum input voltage (276Vac), the GT Series UPS will protect itself and the load by disconnecting the mains and switching to battery operation. Reducing the mains voltage will recover the normal situation.

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GE Digital Energy GT – 6000_10000 UPS

Power factor > 0.97 input

The AC input current drawn by the UPS is less than that supplied to the load. Contrary to UPS and computers without this feature, no disturbances, which may cause problems to other electrical equipment, are fed back to the mains. This feature will become mandatory within a few years.

Bypass operation enable/disable

In case of the mains voltage or mains frequency being outside bypass tolerance but inside UPS input tolerance, bypass operation is inhibited and an alarm is generated – If this happens often, it may be useful to disable bypass function (via UPS monitoring software) after which the unit operates as a UPS without automatic bypass switch.

Remote Power Off (RPO)

RPO may be created by replacing the link with a switch with the characteristics of a “power off” button

(see fig. 4.4.11 in the Operating manual). Under normal conditions this switch will be closed, when it opens the UPS will transfer to stand-by mode and output power is lost.

After closing the RPO switch, the “UPS off” button has to be pressed 2 times within 4 seconds to be able to re-start the unit.

No-load shutdown

Whenever a load of <5% of the UPS maximum load is registered and no mains power is present, the UPS will switch off automatically. Load sensing during battery mode prevents unnecessary discharging of the batteries. This function may be enabled or disabled via the UPS monitoring software.

“No load shutdown” is disabled as default.

Auto Restart

Auto Restart function acts after the UPS has been shut down during mains failure after the batteries are depleted, when no load shutdown switches off the unit or shutdown is commanded by remote control:

- if the function is set “enabled”, the UPS will automatically restart when the mains returns

- if the function is set “disabled”, a manual restart is required as explained in section 4.2.1 of the

Operating manual or via the UPS monitoring software.

The function may be enabled or disabled via UPS monitoring software.

Battery connection test

The GT Series UPS performs an automatic test at start-up and every minute to check that the battery cabling and fuses are properly connected and is able to support power failures. If the test detects a battery disconnection, a corresponding alarm will be generated.

Quick battery test

A quick battery test may be launched via the UPS monitoring software, to check whether batteries are healthy. In case of failure an alarm will be generated.

Deep battery test

A deep battery test will update the run time calculation and may be started via the UPS monitoring software. The test will start only if the battery charge level is higher than 90% and the load must be at least 20% of the nominal rating. The run time calculation will be updated only if the test can run uninterrupted till complete battery discharge.

Modifications reserved

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GE Digital Energy GT – 6000_10000 UPS

8 – Communication

8.1 DB9 Communication Port

The RS232 port is a plug-in interface port, which enables advanced communication between the UPS and the computer via serial cable (fig. 6) and UPS monitoring software.

The interface port is already operative in stand-by mode. To change settings of the unit, we strongly recommend to be sure that the unit is in stand-by mode. For more information regarding possible settings, please refer to the “Help” manual of the UPS monitoring software.

Figure 6 Connecting the serial cable

8.2 SNMP Interface Card (Option)

This card allows the data interface to be connected directly to an Ethernet network. The card is fitted into the SNMP Card slot (fig. 5). For more information, please refer to the user manual that comes with the interface card.

9 - Options

9.1 SNMP Interface Card

See section 8.2

9.2 Parallel Option

The paralleling cable delivered with each GT Series UPS allows you to connect up to 3 UPS in the same power rating together in a parallel system.

For more information on the installation of the parallel system, see the GT Series Operating Manual, section 3.4

9.3 Extended runtimes

See section 6.3

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GE Digital Energy GT – 6000_10000 UPS

10 - Transport / storage

No liability can be accepted for any transport damage when the equipment is shipped in non-original packaging. Do not stock any other package on top.

Store the UPS and Battery Cabinet in a dry location with the batteries in a fully charged state.

Storage temperature must be within –20 +45 °C. If the unit is stored for a period exceeding 3 months, optimal battery lifetime is obtained if the storage temperature does not exceed 25°C.

If the Battery Cabinet is stored for an extended period of time, the batteries must be recharged periodically. Connect Battery Cabinet to a UPS Power module through opening in carton box and recharge the batteries for 24 hours:

- If the storage temperature is within -20 and +30°C: every 6 months,

- If the storage temperature is within -20 and +45°C: every 3 months.

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GE Digital Energy GT – 6000_10000 UPS

A product by:

GE Consumer & Industrial SA

General Electric Company

CH – 6595 Riazzino (Locarno)


T +41 (0)91 / 850 51 51

F +41 (0)91 / 850 51 44

E [email protected]

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GE Digital Energy GT – 6000_10000 UPS

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