GE SG 10, SG 40, SG 30, SG 20 User Manual

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SGT5000_030-040_UPS_ GE_01

SG Series 10, 20, 30 and 40 kVA

GE

OPERATING MANUAL

UNINTERRUPTIBLE POWER SUPPLY

Digital Energy

TM

SG Series

10 – 20 – 30 – 40 kVA

Series 0

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General Electric Company

2500 Discovery Blvd.

Rockwall, TX 75032

Telephone: [phone]

Fax: [phone]

SG Series UPS Technology for the digital world

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GE

Model:

Date of issue: 04/15/2003

File name: OPM_SGS_USM_10K_40K_0US_V010

Revision:

Author:

Identification No.:

Up-dating

Revision Concern Date

COPYRIGHT © 2003 by GE

SG Series

1.0

Raimondo Bizzozero

10, 20, 30 and 40 kVA / Series 0

All rights reserved.

The information contained in this publication is intended solely for the purposes indicated.

The present publication and any other documentation supplied with the UPS system is not to be
reproduced, either in part or in its entirety, without the prior written consent of GE.

The illustrations and plans describing the equipment are intended as general reference only and
are not necessarily complete in every detail.

The content of this publication may be subject to modification without prior notice.

OPM_SGS_USM_10K_40K_0US_V010.doc 2/88 Operating Manual

SG Series

10, 20, 30 & 40 kVA

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Dear Customer,

We thank you for selecting our products and
are pleased to count you amongst our ver
valued customers at GE.

We trust that the use of the SG Serie
Uninterruptible Power Supply system,
developed and produced to the highes
standards of quality, will give you complete
satisfaction.

Please carefully read the Installation Guide.
It contains all the necessary information
about the installation of the UPS.

GE

Thank you for choosing

START UP AND COMMISSIONING

A GE Global Services Field Engineer must perform start-up and
commissioning of the UPS. Please Contact G.E. Global Services at least two
weeks prior to schedule start-up and commissioning at 1-800-637-1738, or by
E-mail at [e-mail]

Manufactured by:

Distributed in the USA by: Your service contact:

GE

!

g

GE

GE DIGITAL ENERGY SA

6595 Riazzino (Locarno)
Switzerland

OPM_SGS_USM_10K_40K_0US_V010.doc 3/88 Operating Manual

SG Series

10, 20, 30 & 40 kVA

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GE

Preface

Congratulations on your choice of a SG Series Uninterruptible Power Supply (UPS).
It will help eliminate Load disturbances due to unexpected power problems.

Manual

This
the switches, the meaning of the system events related to the front panel
indication, and provides procedures for starting and stopping the equipment.

Please refer to the accompanying Installations Guide, which describes how to
prepare the installation site, and it provides weight, dimensions and procedures
for moving, installing and connecting the UPS.

While every care has been taken to ensure the completeness and accuracy of this
manual, GE assumes no responsibility or liability for any losses or damages
resulting from the use of the information contained in this document.

WARNING!

SG Series 10, 20, 30 and 40 kVA, is a product that needs to be installed by a
licensed and knowledgeable contractor.

describes the function of the UPS module, the purpose and location of

We recommend that this manual be kept next to the UPS for future references.
If any problems are encountered with the procedures contained in this manual,
please contact your Service Center before you proceed.

This document shall not be copied or reproduced without the permission of GE.

Some of the information contained in this manual may be changed without notice
to reflect technical improvements.

Safety instructions

Read the safety instructions contained on the following pages carefully before the
installation of the UPS, options and

Pay attention to the rectangular boxes included in the text:

They contain important information and warning concerning electrical connections
and personnel safety.

Battery System

.

Parallel version secured with RPA

When included in the text, this symbol refers to
operation needed only for parallel system.

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Table of contents Page

1 IMPORTANT SAFETY INSTRUCTIONS .................................................................7

2

INTRODUCTION.....................................................................................................10

3 DESCRIPTION........................................................................................................11

3.1 BLOCK DIAGRAM AND MAIN ELEMENTS..................................................................11

3.2 OPERATION MODES ...................................................................................................12

3.2.1 Normal operation mode.................................................................................................12

3.2.2 Utility failure operation...................................................................................................12

3.2.3 Utility recovery operation...............................................................................................13

3.2.4 Automatic Bypass..........................................................................................................13

3.2.5 Manual Bypass..............................................................................................................13

3.3 PARALLEL SYSTEM OPERATION ..............................................................................14

3.3.1 Introduction to the parallel system.................................................................................14

3.3.2 Features of RPA parallel system...................................................................................15

3.3.3 System control...............................................................................................................15

3.3.4 Synchronization.............................................................................................................15

3.3.5 Load sharing..................................................................................................................15

3.4 RECTIFIERS PARALLELED ON THE SAME BATTERY..............................................16

3.5 RECYCLING AT THE END OF SERVICE LIFE............................................................17

4 LAYOUT .................................................................................................................18

4.1 LAYOUT SG SERIES 10 AND 20 KVA ..............................................................................18

4.2 LAYOUT SG SERIES 30 AND 40 KVA ..............................................................................19

5 CONTROL PANEL .................................................................................................20

5.1 CONTROL PANEL ........................................................................................................20

5.2 TABLE OF FUNCTIONS AND INDICATIONS ON CONTROL PANEL.........................20

6 LCD SCREEN.........................................................................................................22

6.1 METERING MODE........................................................................................................23

6.2 ALARMS........................................................................................................................26

6.3 PARAMETERS..............................................................................................................27

6.4 EDIT MODE ..................................................................................................................29

6.5 USER PARAMETERS...................................................................................................32

6.6 EVENTS (ALARMS AND MESSAGES) ........................................................................35

6.6.1 Alarms list......................................................................................................................35

6.6.2 Messages list.................................................................................................................39

6.6.3 Event report

7

7.1 PROCEDURES FOR SINGLE UPS..............................................................................43

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OPERATION...........................................................................................................42

7.1.1 Start-up of the

7.1.2 Maintenance shutdown (Load on Q2) ...........................................................................44

7.1.3 From Manual Bypass (Q2) to normal function On-line ..................................................45

7.1.4 Complete UPS shutdown (No Load supply)..................................................................46

7.1.5 Restore to normal operation after “total off”...................................................................47

7.1.6 Restore to normal operation after EPO (Emergency Power Off)...................................48

SG Series

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SG Series

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SG Series

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7.2 PROCEDURES FOR UPS FUNCTIONING AS FREQUENCY CONVERTER .............49

7.2.1 Start-up of the SG Series as frequency converter ............................................................49

7.2.2 Complete UPS shutdown (No Load supply)..................................................................50

7.2.3 Restore to normal operation after “total off”...................................................................51

7.2.4 Restore to normal operation after EPO (Emergency Power Off)...................................52

7.3 PROCEDURES FOR PARALLEL SYSTEM..................................................................53

7.3.1 Parallel System start-up ................................................................................................53

7.3.2 Maintenance system shutdown (Load supplied from Q2 on all Units)...........................55

7.3.3 From Manual Bypass (Q2) to normal function On-line ..................................................56

7.3.4 Separate a Unit from the parallel system (System Redundancy)..................................58

7.3.5 Reconnect a Unit to a parallel system ...........................................................................59

7.3.6 Parallel system shutdown (No Load supply) .................................................................60

7.3.7 Restore to normal operation after “total off”...................................................................62

7.3.8 Restore to normal operation after EPO (Emergency Power Off)...................................64

7.4 PROCEDURES FOR PARALLEL SYSTEM WITH COMMON BATTERY ....................66

7.4.1 Parallel System start-up ................................................................................................66

7.4.2 Maintenance system shutdown (Load supplied from Q2 on all Units)...........................68

7.4.3 From Manual Bypass (Q2) to normal function On-line ..................................................69

7.4.4 Separate a Unit from the parallel system (System Redundancy)..................................71

7.4.5 Reconnect a Unit to a parallel system ...........................................................................72

7.4.6 Parallel system shutdown (No Load supply) .................................................................73

7.4.7 Restore to normal operation after “total off”...................................................................75

7.4.8 Restore to normal operation after EPO (Emergency Power Off)...................................77

GE

8 CUSTOMER INTERFACE......................................................................................79

8.1 CUSTOMER INTERFACE ............................................................................................79

8.1.1 Serial Port J3.................................................................................................................80

8.1.2 Output free potential contacts .......................................................................................80

8.1.3 Programmable input free contacts ................................................................................81

8.1.4 Gen Set Signaling (GEN ON)........................................................................................81

8.1.5 AUX external Maintenance Bypass...............................................................................81

8.1.6 Auxiliary Power Supply (APS) 24 VDC / 1A ..................................................................81

8.1.7 EPO (Emergency Power Off) Input contact...................................................................82

9 OPTIONS ................................................................................................................83

9.1 BUILT IN UPS OPTIONS ..............................................................................................83

9.2

9.3 OPTIONS IN UPS CABINET.........................................................................................83

9.4 CONNECTION FOR OPTIONS.....................................................................................84

9.4.1 Remote Signaling Box (RSB) ........................................................................................84

COMMUNICATION OPTIONS ......................................................................................83

10 MAINTENANCE......................................................................................................85

10.1 MAINTENANCE ............................................................................................................85

10.1.1 Service check ................................................................................................................85

10.1.2 Fans and ventilation ......................................................................................................85

10.1.3 Other components with limited lifetime..........................................................................85

10.1.4 Battery ...........................................................................................................................85

10.1.5 Long shut-down periods of the UPS-system .................................................................86

10.1.6 UPS room conditions and temperature .........................................................................86

10.1.7 Long shut-down periods of the UPS-system .................................................................86

11 NOTES....................................................................................................................87

11.1 NOTES FORM ..............................................................................................................87

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1 IMPORTANT SAFETY INSTRUCTIONS

GE

SAVE THESE INSTRUCTIONS

This manual contains important instructions for models SG Series 50 and 80 kVA that should be
followed during installation and maintenance of the UPS and battery.

- Move the UPS in an upright position in its original package to the final destination room.
To lift the cabinets, use a forklift or lifting belts with spreader bars.

- Check for sufficient floor and elevator loading capacity.

- Check the integrity of the UPS equipment carefully.
If you notice visible damage, do not install or start the UPS. Contact the nearest Service Center
immediately.

- WARNING! RISK OF ELECTRICAL SHOCK: Do not remove covers; there are no user serviceable
parts inside.

- All maintenance and service work should be performed by qualified service personnel.
The UPS contains its own energy source (battery).

- The field-wiring terminals may be electrically live, even when the UPS is disconnected from the
utility.

- Dangerous voltages may be present during battery operation.
The battery must be disconnected during maintenance or service work.

- This UPS contains potentially hazardous voltages.

- Be aware that the inverter can restart automatically after the utility voltage is restored.

INSTALLATION

- This UPS must be installed and connected only by trained personnel.

- Verify accurately during Commissioning and Maintenance of the UPS, for the following:
Damaged components, squeezed wires and cables, or not correctly inserted plugs.

- After removing the sidewalls of the UPS, make sure that all earth connections when
reassembling, are correctly reattached

- This UPS is intended for use in a controlled indoor environment free of conductive contaminants
and protected against animals intrusion.

- HIGH GROUND LEAKAGE CURRENT: Ground connection is essential before connecting to AC
input!

- Switching OFF the unit does not isolate the UPS from the utility.

- Do not install the UPS in an excessively humid environment or near water.

- Avoid spilling liquids on or dropping any foreign object into the UPS.

- The unit must be placed in a sufficiently ventilated area; the ambient temperature should not
exceed 104°F (40°C).

- Optimal battery life is obtained if the ambient temperature does not exceed 77°F (25°C).

- It is important that air can move freely around and through the unit. Do not block the air vents.

- Avoid locations in direct sunlight or near heat sources.

- Store the UPS in a dry location; storage temperature must be within -13°F (-25°C)

- If the unit is stored for a period exceeding 3 months, the battery must be recharged periodically
(time depending on storage temperature).

GENERAL

STORAGE

BATTERY

to

131°F (55°C).

- The battery-voltage is dangerous for person’s safety.

- When replacing the battery, use the same number, voltage (V) and capacity (Ah).

-

Proper disposal or recycling of the battery is required.
Refer to your local codes for disposal requirements.

- Never dispose of battery in a fire: They may explode.

- Do not open or mutilate battery: Their contents (electrolyte) may be extremely toxic.
If exposed to electrolyte, wash immediately with plenty of water.

- Avoid charging in a sealed container.

- Never short circuit battery.
When working with battery, remove watches, rings or other metal objects, and only use
insulated tools.

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Safety instructions when working with battery

EXTERNAL BATTERY MUST BE INSTALLED AND CONNECTED TO THE
UPS BY QUALIFIED SERVICE PERSONNEL.

INSTALLATION PERSONNEL MUST READ THIS ENTIRE SECTION AND
REFER TO THE BATTERY MANUFACTURERS INSTALLATION MANUAL
BEFORE HANDLING THE UPS AND BATTERY.

UPS INTENDED TO BE USED WITH A REMOTE BATTERY SUPPLY – ALL MODELS:
“PLEASE REFER TO THE BATTERY MANUFACTURER’S INSTALLATION MANUAL FOR
BATTERY INSTALLATION AND MAINTENANCE INSTRUCTIONS”.

DANGER!

Full voltage and current are always present at the Battery Terminals.
The Battery used in this system can provide dangerous voltages, extremely high currents and a risk of
electric shock.
They may cause severe injury if the terminals are shorted together or to ground.
You must be extremely careful to avoid electric shock and burns caused by contacting Battery
Terminals or shorting terminals during battery installation.
Do not touch un-insulated Battery Terminals.

A qualified service person that is familiar with Battery systems and required precautions must install and
service the Battery.
The installation must conform to national and local codes.
Keep unauthorized personnel away from Battery.

The qualified service person must take these precautions:

1 Wear protective clothing, such as rubber gloves and boots and protective eye wear.

Batteries contain caustic acids and toxic materials and can rupture or leak if mistreated.
Remove rings and metal wristwatches or other metal objects and jewelry.
Do not carry metal objects in your pockets where the objects can fall into the Battery Cabinet.

2 Tools must have insulated handles and must be insulated so that they will not short Battery

Terminals.
Do not allow a tool to short between individual or separate Battery Terminals or to the cabinet or
rack.
Do not lay tools or metal parts on top of the Battery, and do not lay them where they could fall onto
the Battery or into the cabinet.

3 Install the Battery as shown on the drawing provided with the Battery.

When connecting cables, never allow a cable to short across a Battery’s Terminals, the string of
batteries, or to the cabinet or rack.

4 Align the cables on the Battery Terminals so that the cable lug will not contact any part of the

cabinet or rack, even if the Battery is moved.
Keep the cable away from any sharp metal edges.

5 Install the Battery Cables so the UPS or Battery Cabinet Doors cannot pinch them.

6 Do not connect the Battery Terminal to Ground.

If any Battery Terminal is inadvertently grounded, remove the source of the ground.
Contacting any part of a grounded Battery can cause a risk of electric shock.

7 To reduce the risk of fire or electric shock, install the Battery in a temperature and humidity

controlled indoor area, free of contaminants.

8 Battery System Chassis Ground (earth) must be connected to the UPS chassis ground (earth).

If you use conduit, this ground conductor must be routed in the same conduit as the Battery
Conductors.

9 Where conductors may be exposed to physical damage, protect the conductors in accordance with

all applicable codes.

10 If you are replacing Battery or repairing Battery Connections, shut OFF the UPS and remove the

Battery Fuses or open the Battery System disconnect.

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Safety symbols and warnings

Safety warnings
The text of this manual contains some warnings to avoid risk to the persons and to avoid damages

to the UPS system and the supplied critical loads.

The non-observance of the warnings reminding hazardous situations could result in human injury
and equipment damages.

Please pay attention to the meaning of the following warnings and symbols.

Throughout this manual the following symbols are defined:

WARNING, if instruction is not followed injury or serious equipment
damage may occur!

CAUTION, internal parts have dangerous voltage present.
Risk of electric shock!

PE (Earth) – GND (Ground)
PROTECTIVE GROUNDING TERMINAL:
A terminal which must be connected to earth ground prior to making any
other connection to the equipment.

A terminal to which or from which an alternating (sine wave) current or
voltage may be applied or supplied.

A terminal to which or from which a direct current or voltage may be
applied or supplied.

This symbol indicated the word “phase”.

This symbol indicates the principal on/off switch in the on position.

This symbol indicates the principal on/off switch in the off position.

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2 INTRODUCTION

An Uninterruptible Power Supply (UPS) provides the power for critical loads that need a
reliable, continuous, disturbance free supply.

In case the power provided by the Utility Fails, or exceeds the permitted tolerances, the power
to supply the Load is provided by the Battery for the specified time at the rated Load (or longer
at a reduced Load) or until the Utility power returns.

SG Series is a true double conversion On-line UPS system where the Load is continuously
supplied by the Inverter through the Rectifier.

In case of trouble on the Inverter Output Voltage, or when overload or short-circuit on the
output occur, the Load is instantly transferred to the Utility via the Automatic Bypass.

The UPS automatically returns to normal mode when the failure condition is restored.

Key features

• More Critical equipment supported

Rated at 0.8 Power Factor, SG Series delivers more real power than other UPS in the
market.
With today’s trend toward power factor corrected loads, SG Series can support more total
Load than any other UPS available, allowing you to support a greater number of today’s
enterprise computing Power Factor Corrected (PFC) equipment.

• No single point of failure

Redundant Parallel Architecture (RPA) is an exclusive GE technology.
With RPA, SG Series UPS are controlled in a true peer-to-peer configuration where all
critical elements and functions (including Bypass) are redundant.
SG Series is designed to be the most reliable power protection system available on the
market today.

• High Efficiency

Using IGBT technology and Space Vector Modulation (SVM) strategy, SG Series offers low
output voltage distortion and provides efficiencies up to 93%.

• Fully digital

Digital Signal Processor (DSP), Flash memory and SVM strategy, are the technology
corner stones of new age of power quality and power reliability.

• Extremely flexible

Tailor made power protection to meet your individual installation requirements; SG Series
offers various options like input harmonic filters and our comprehensive JUMP software
suite for mission control and data protection to cover all your application needs.

:

GE

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3 DESCRIPTION

3.1 BLOCK DIAGRAM AND MAIN ELEMENTS

GE

The SG Series system can be divided into the following main elements:

Fig. 3.1-1 Block diagram

Control System SG Series is designed with microprocessor-controlled signal
processing circuits. The interface between the operator and the unit is provided by the
monitoring system on the front panel.
This monitoring system consists of an active mimic diagram, a keyboard and a backlit
display.

Rectifier The standard Rectifier consists of a 6-pulse SCR-bridge, which
converts the 3-phase Utility Voltage into a controlled and regulated DC-voltage.
This regulated DC-voltage is used to supply power to the Inverter, and to provide charging
power to the Battery.

Inverter

The Inverter converts the DC voltage into a three-phase AC­voltage with constant amplitude and frequency, which is completely independent and isolated
from the AC-input voltage.

Automatic Bypass The Automatic Bypass consists of a static semiconductor-switch
(SSM: Static Switch Module), used to provide an uninterrupted transfer of the Load from
Inverter to Utility.

Back-feed Protection

All SG Series UPS's are equipped with an automatic system for
the protection against voltage back feeding towards Utility, through the Bypass (Applied
Standard IEC 62040-1).
This protection works automatically by opening contactor K6 and K8 (in series with the
thyristors of the static switch) and eventually K7, and acts in case of internal defects of the
system, or due to wrong manipulations on the Manual Bypass Q2.

Manual Bypass The Manual Bypass consists of a pair of manual switches (Q1
and

Load with power directly from the Utility.

, which removes the UPS from the Load for maintenance, while still supplying the

Q2)

Battery The Battery supplies the DC power to the Inverter when the

Utility is out of accepted tolerances.

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3.2 OPERATION MODES

3.2.1 Normal operation mode

During normal operation, the Rectifier
converts input AC power to DC.
The DC power provides input power for the
Inverter and charging power for the Battery.
The Inverter converts the DC power to
continuous and regulated AC power, which
supplies the critical load.
The control panel reports the Battery charge
status and the expected backup time with the
actual load.

3.2.2 Utility failure operation

When the Utility is no longer within acceptable
tolerances, the Battery will provide the DC
power to the Inverter.
The Inverter will maintain continuous AC
power to the Load until the Battery Voltage
reaches the lower limit of the Inverter
operation capability.
During the discharge, the LCD screen displays
the estimated time the Battery can support the
critical load.
Prior to the Battery completely discharging,
the "stop operation" alarm (shutdown
imminent) warns the operator that the Battery
is almost discharged and the UPS is about to
shut down.

Fig. 3.2.1-1 Block diagram normal operation mode

Fig. 3.2.2-1 Block diagram Utility Failure operation

GE

In case of parallel operation

With a parallel system for power capacity (see Section 3.3)

With the

•

Load to be transferred to Utility (after a selectable time delay).

• With Bypass Utility power not available, a low Battery warning on any unit will start the

“

stop operation

The Load will shut down at the end of the “stop operation” time period.

With a parallel system for redundancy (see Section 3.3)

• When a Battery low warning occurs on a unit not necessary to support the present load, this

unit will shut down after a timeout period (selectable).
The Load is shared between the other units

• As the warning occurs on one unit necessary to support the present load, the system starts

the "
The Load will shut down at the end of the “stop operation” time period.

OPM_SGS_USM_10K_40K_0US_V010.doc 12/88 Operating Manual

Bypass Utility power available,

” timer (adjustable).

stop operation

" timeout (selectable).

a low Battery warning on any unit will cause the

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3.2.3 Utility recovery operation

As soon as the AC input power recovers, the

Rectifier will start automatically,

power to the Inverter and recharging the Battery.
If the Inverter was previously shut down due to low
Battery, the Load will be initially powered by Utility
through the
When the Battery is recharged enough to ensure a
minimum time of operation with the present load,
the Inverter will start automatically and the Load
will be transferred back to the Inverter.

When the AC input power recovers, the Rectifiers will start up sequentially, according to their
number in the parallel system. This minimizes the
The Inverters will start up automatically, but only when the Battery has recharged enough for
a

minimum runtime
When enough Inverters to supply the Load have been restarted, the Load will be transferred
from the Automatic Bypass back to the Inverter output.

Automatic Bypass

In case of parallel operation

with the present load.

supplying DC

.

Fig. 3.2.3-1 Block diagram Utility recovery operation

initial inrush current.

GE

3.2.4 Automatic Bypass

In normal operation, the Load is supplied by the
Inverter.

When the control system detects a fault in the
Inverter, an overload condition or a short-circuit
condition, the Automatic Bypass will transfer the
critical Load to the Utility without interruption.
When the Inverter recovers, or the overload or
short-circuit condition is corrected, the Load will be
automatically transferred back to the Inverter.
If the UPS is unable to return to normal mode
following an automatic transfer to Bypass mode, an
alarm condition will be initiated.
A Manual Bypass (operator initiated) will not be
considered as an alarm condition.

In case of parallel operation

Each unit has it’s own internal Bypass. These units are continuously exchanging information,
enabling all of the internal Bypass circuits in a parallel system to operate simultaneously.
If the Inverter of a unit fails, it’s Bypass circuit remains available to the parallel system.
It is excluded only if the unit is separated from the common bus by opening it’s output switch Q1.

3.2.5 Manual Bypass

FIG. 3.2.4-1 BLOCK DIAGRAM AUTOMATIC

BYPASS

The Manual Bypass circuit consists of Q1 and Q2
manual switches, which permits transfer of the
Load directly to the unconditioned AC power
without interruption, leaving the UPS available for
maintenance.

Fig. 3.2.5-1 Block diagram Manual Bypass

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3.3 PARALLEL SYSTEM OPERATION

3.3.1 Introduction to the parallel system

Two or more equal power units can be paralleled to increase the output power (paralleling for
capacity) or to improve the overall reliability of an UPS system (paralleling for redundancy).

The outputs of parallel units are connected to a common power bus, and in normal operation
the units connected on the parallel bus share the Load equally.
The modular concept of SG Series allows parallel operation of
paralleling switchgear, external bypass circuits or common control circuitry (see Fig. 3.3.1-1).

Parallel units for power capacity

Several units can be paralleled in order to achieve output power greater than the maximum
power of a single unit.
The maximum total power shared between the paralleled units is equal to the total installed
nominal power.
In the event of a failure of one unit, the power supplied by the UPS system becomes
insufficient and the Load will be transferred to the Utility Bypass source.

Parallel units for redundancy

The nominal power rating of the n+1
or greater than the required
The Load will be equally shared by the n
Should one of the n
the load, maintaining conditioned power to the critical load.
From this results higher reliability and security for the Load plus a higher MTBF (Mean
Time Between Failures).

paralleled units trip Off-line, the remaining (n+1) modules will supply

Load

out of n redundant paralleled modules must be equal to

power.

units connected on the output bus.

up to 8 units

, without using

GE

Fig. 3.3.1-1 Block diagram parallel system operation

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3.3.2 Features of RPA parallel system

GE

The SG Series parallel system is designed to provide a complete

Architecture, and is free from common equipment.
Not only the Inverters are redundant, but also the Bypass functions are designed with
redundant modular concept.

When one UPS needs maintenance or service, the Load is powered by the other units
supplying the Load bus.

The redundant communication bus to which all units are connected keeps each unit informed
about the status of all the other units.

The control panel located on each unit allows controlling and monitoring the status of this
unit.

3.3.3 System control

A

high-speed redundant, serial communication

thus the communication between the CPU's of each unit.

Each module controls it's own function and operational status and communicates with all other
modules, in order to act or react if necessary, adapting it to the new conditions.

bus guarantees the exchange of data and

Redundant Parallel

3.3.4 Synchronization

All units are identical, but one unit is arbitrarily selected as the reference and all the other units
synchronize to this unit, which in turn, synchronizes to the Utility Bypass voltage, as long as
the later is within tolerances.

In case of reference failure, another unit in the parallel system is automatically chosen to take
over the reference role.

The Bypass Input for all the units of the parallel system must be supplied from the same AC
source (no phase shift allowed between them).

3.3.5 Load sharing

On each unit of the parallel system, Inverter Output Voltage and Current are measured and
applied to a Load sharing bus.

An eventual difference between the units is therefore automatically equalized.

It is strongly recommended that no transformers, automatic circuit
breakers or fuses should be inserted between the unit’s output and the
Load common bus bars.

However, it is recommended that a disconnect or isolation switch be
inserted.

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3.4 RECTIFIERS PARALLELED ON THE SAME BATTERY

A parallel system with a Common Battery for two or more Rectifiers,
requires a particular installation and adequate setting of some
parameters, (accessible only through password), and can therefore
only be done by a qualified engineer from GE.

Usually each Rectifier-Inverter Unit runs with its own Battery.
In case of parallel units are running with a Common Battery (max. 4 UPS - see Fig 4.12-1), the
sharing circuit between individual Rectifier is integrated in the communication bus of the
system in order to assure an equal sharing of the Rectifiers output currents.

1 –

Rectifier

2 –

Inverter

3 –

Automatic Bypass

4 –

Manual Bypass

5 –

Mains Power

GE

6 –

Load Bus Bar

7 –

External Battery Fuse

8 –

Battery

Fig. 3.4-1 Diagram RPA system with Rectifiers on Common Battery

Pay attention to the following recommendations:

• The units delivered for this functioning mode needs a special parameters setting, so they

must be prepared in advance before the installation.

• The installation must be performed only with the UPS system must be completely shut

down.

• The AC Rectifiers input power (5) must be the same, with clockwise phase rotation for each

unit.

• Each Rectifier must be set for the same floating DC voltage and the same Battery current

limitation.

• It is recommended to install the fuses / MCB (7) on each line connecting the Rectifiers to

the common

• In case one must be powered down for maintenance, switch-OFF the concerned unit before

open the DC fuses / MCB on the Battery line (7).

• It is recommended to connect an external NO free contact “Battery Fuses” to the UPS and

to enable the function by setting the parameter (see Section 7.1).

• If an emergency generator set supply the UPS, and the free contact “Generator ON” is

connected to the Customer interface, connect a separate NO free contact on each parallel
unit.

• The parameters enabling the Battery test, both manual and automatic, must be set in the

same mode on all the units having the Rectifiers on Common Battery.

• Do not connect the temperature sensor for automatic battery floating voltage compensation.

• Do not enable the function Boost charge (parameter 87).

Battery

for maintenance / safety reasons.

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3.5 RECYCLING AT THE END OF SERVICE LIFE

NOTE!

This product has been designed to respect the environment, using
materials and components respecting eco-design rules.

It does not contain CFCs (Carbon Fluor Clorid) or HCFCs (Halogen
Carbon Fluor Clorid).

Packing material recycling

GE, in compliance with environment protection, uses only environmentally
friendly material.

UPS packing materials must be recycled in compliance with all applicable
regulations.

GE

WARNING!

Leads contained in the batteries is a dangerous substance for the
environment, therefore it must be correctly recycled by specialized
companies!

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4 LAYOUT

GE

4.1 LAYOUT

SG Series

10 AND 20 KVA

SGT5000_030-040_UPS_GE_02

FIG. 4.1-1 SG SERIES GENERAL VIEW

SGT5000_010-020_UPS_GE_03

Fig. 4.1-2 SG Series general view with open doors

Fig. 4.1-3 Manual operated switches

Fig. 4.1-4 Control Panel

SNMP

P4

1

2

3

4

1

2

3

4

SGT5000_100-150_Customer interface_03

XA

XB

P4

Q1

Q2

SNMP

XA

Customer Interface Board

UPS output switch

Manual Bypass switch

SNMP Card (option)

Terminals for 24VDC Auxiliary Power Supply connection

Fig. 4.1-5 Connectivity Rack

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XB

Terminals for EPO (Emergency Power Off) connection

SG Series

10, 20, 30 & 40 kVA

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4.2 LAYOUT SG Series 30 AND 40 KVA

GE

SGT5000_030-040_UPS_GE_02

FIG. 4.2-1 SG SERIES GENERAL VIEW

Q1

Q2

ON

ON

OFF

OFF

Fig. 4.2-2 SG Series general view with open doors

SGT5000_030-040_UPS_GE_03

Fig. 4.2-4 Control Panel

Fig. 4.2-3 Manual operated switches

P4 Customer Interface Board

P4

SNMP

1

2

3

4

1

2

3

4

Fig. 4.2-5 Connectivity Rack

SGT5000_100-150_Customer interface_03

XA

XB

Q1

Q2

SNMP

XA

XB

UPS output switch

Manual Bypass switch

SNMP Card (option)

Terminals for 24VDC Auxiliary Power Supply connection

Terminals for EPO (Emergency Power Off) connection

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5 CONTROL PANEL

5.1 CONTROL PANEL

GE

Fig. 5.1-1 Control Panel

5.2 TABLE OF FUNCTIONS AND INDICATIONS ON CONTROL PANEL

inverter on/off

Key to switch the Inverter ON.
(This key is also used to

off push button).

reset “total off”

if pressed simultaneously with

inverter on/off

Key for Inverter shutdown.
Press key to transfers the
Keep pressed for 5 seconds to shutdown the Inverter.

Load to Utility

.

This key is also used as the EPO (Emergency Power Off) reset.

mute

Key to reset general alarm and buzzer.

test

Key to test the control panel LED’s and buzzer.
(Pressing this key causes all the LED’s to light and the buzzer to
sound 3 times).

The push-button “total off” is protected by a red cover.
By pressing it, you immediately separate the UPS from utility and the Load.

Attention: “total off” cannot disconnect the UPS from the Load with Q2
closed.

To reset “total off”: push and hold the “total off” push-button and the “I” key
(inverter on) simultaneously for some seconds.

total

For parallel system,

pressing “

total off

” on one unit connected on

parallel bus (switch Q1 closed), all the units are separated from the load.
The “

total off” reset

must be done only on one unit connected on the parallel

bus (switch Q1 closed).

Special care must be taken in using this command, in order to
avoid accidental Load disconnection.

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General alarm condition.
It blinks

The LED remains lighted (with alarm condition still present) and the

alarm

service check

Fig. 5.2.1-1 LED’s on synoptic diagram

Fig. 5.2.1-2 LCD screen

buzzer stops as the key “mute” has been pressed.

LED ON indicates that a regular maintenance service is needed.
May be reset by a service technician only.
(See chapter 10 – Maintenance)

THE LED IS ON ALSO WHEN THE OUTPUT SWITCH Q1 IS OPEN,
INDICATING THAT THE INVERTER IS IN
SUPPLYING THE LOAD.

a) LED ON indicates that the Battery reserve lasts for only 3 more

b) LED ON in case of over temperature or overload >125% together with

All LED’s ON indicate that the Battery is fully charged.
LED a Yellow

LED b, c, d
(EACH ONE INDICATING 25 % OF BATTERY BACKUP)

LED’s ON indicate the Load status of the UPS.

LED d red (≥100 % load)

LED c
LED b green (66% load)

LED a

when one or more alarm is activated. The internal buzzer is

minutes

missing

After the timeout the Inverter will shut down.

(selectable).

Utility

.

(Fixed: indicating last 25 % of Battery backup)

(Blinking: indicating Battery backup ≤ 5%)

Green

yellow (100% load)

green (33% load)

ON

SERVICE MODE, NOT

Definition of the LED’s on mimic diagram

LED 1 = Input Utility Rectifier (green)
LED 2 = Input Utility Bypass (green)
LED 3 = Rectifier ON (green)
LED 4a = Discharging (yellow)
LED 4b = Charging (green)
LED 5 = Inverter ON (green)
LED 6 = Load on Inverter (green)
LED 7 = Load on Utility (green)
LED 8
LED 9 = Manual Bypass (Q2) ON (yellow)

User LCD Interface
Consist of a LCD screen, 4 lines with 20
characters each and six keys. It offers:

• UPS operating, AC and DC metering

information.

• History of alarms and events.

• Functionality can be programmed to meet

customer needs by changing parameters.

= Output Load Voltage (green)

GE

.

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6 LCD SCREEN

The user interface consists of a back lit LCD screen having:

•

4 lines with 20 characters

And

• 6 keys (the function is described for each operating mode).

The operation is extremely simple and is structured on three important main menus related to
the UPS operation, as follows:

metering A UPS must offer some metering information for the user to be able to

examine the operating status at any time.

alarms In the event of Utility failures or abnormal functioning, the UPS must keep a

history of what has happened as a series of events.

parameters The user must be able to program certain functions of the UPS (user

parameters, accessible without password) to his needs.

LCD screen standard version

metering

alarms

parameters

(standard version for Latin characters).

LCD screen

4 rows x

20 characters

+

ok

GE

The 3 buttons existing on the left side of the screen are used to activate the operating
modes, while the buttons on the right side are used to carry out functions inside these
operating modes.

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6.1 METERING MODE

The metering mode is entered any time the metering button is pressed.
While in this mode the LCD will display a series of screens containing metering information.
In this mode the buttons perform the following functions:

metering
alarms Abandons the metering mode and enters the alarms mode.
parameters Abandons the

+ Scrolls forward to the next screen.
– Scrolls backward to the previous screen.

ok Displays the main screen for this mode.

Main screen

This screen displays the current status of the UPS in a condensed form.
The information offered by this screen consists of:

• The type of the machine: Family name, series number (P + unit number for parallel

• The status of the load.

• The Load amount as a percentage of the nominal Load (referred to the most loaded phase).

• The estimated

Battery data screen

This screen displays:

• The Battery voltage.

• The Battery Current (negative values correspond to the discharge of the Battery).

• The temperature of the Battery (XXX indicates sensor disabled).

• The current charge level.

•

Bypass Utility data screen

This screen refers to the AC source supplying the Bypass. This screen displays:

• The frequency.

• The voltage levels of the three phase voltages.

Scrolls forward to the next screen.

metering mode

and enters the

version from 1 to 8) and power range.

Battery

backup time in minutes with the present load.

metering

alarms

parameters

SG Series S0 30kVA
LOAD ON INVERTER

LOAD = 84%

Autonomie = 12min

The estimated backup time with the present load.

metering

alarms

parameters

metering

alarms

parameters

Ub=540V Ib= + 15A
Battery Temp= + 20°C
Charge Level= 87%
Autonomy = 12min

UT ILIT Y

f = 60.0Hz

U1=276V U2=275V

U3=277V

parameters mode

+

–

ok

.

+

–

ok

+

–

ok

GE

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Rectifier Utility data screen

This screen refers to the AC source supplying the Rectifier.
This screen displays:

• Iout1 = output current Rectifier Bridge.

• Iout2 = output current 2

• The voltage levels between the three phases (line-to-line).

The input frequency of the Rectifier.

•

Inverter data screen

This screen displays:

• The voltage level of the three phase voltages (line-to-neutral).

• The output frequency of the Inverter.

• The synchronization status of the Inverter with respect to Utility.

Status Load screen

This screen displays:

• The Load level in kVA (for RPA: only this unit).

• The Load level as a percentage of the nominal rated Load (for RPA: only this unit).

• The source of the power supplied to the Load.

Load on phases screen 1

This screen displays for each phase:

The output phase voltage and current as RMS values (for RPA: total value of Parallel

•

System).

• The output Load as percent (for RPA: respect to the rated power of Parallel System).

nd

Rectifier Bridge (optional 12 pulse Rectifiers only).

metering

alarms

parameters

metering

alarms

parameters

metering

alarms

parameters

metering

alarms

parameters

U12=481V Iout1 =107A
U23=480V Iout2 = 0A
U31=482V f=60.0Hz

U1=277V I=30A 84%
U2=277V I=26A 73%
U3=277V I=27A 76%

RECTIFIER

INVERTER: U1=277V
U2= 277V U3=277V
Frequency = 60.0Hz

Synchronized

LOAD ON UPS
Load = 25.20kVA
Percentage = 84%

LOAD ON INVERTER

LOAD ON PHASES

+

–

ok

+

–

ok

+

–

ok

+

–

ok

GE

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Load on phases screen 2

This screen displays for each phase:

The Load active power (kW) (for RPA: total value of Parallel System).

•

• The Load apparent power (kVA) (for RPA: total value of Parallel System).

GE

metering

alarms

parameters

LOAD ON PHASES
L1= 6.72kW 8.40kVA

L2= 5.84kW 7.30kVA

L3= 6.08kW 7.60kVA

+

–

ok

Miscellaneous screen

This screen displays:

• The temperature of the Inverter Bridge.

• The total operating time for the UPS (in hours).

• The total operating time for the Inverter (in hours).

metering

alarms

parameters

MISCELLANEOUS
InvHeatsink = 45°C
UpsOperTime= 3125h
InvOperTime = 2135h

+

ok

Utility Faults Statistics screen

This screen displays:

• The total number of minor Utility faults (Bypass Utility out of tolerance faults).

• The total number of major Utility faults (Rectifier Utility out of tolerance faults).

• The total number of detected output overloads.

metering

alarms

parameters

UTILITY FAULTS STAT.
Minor = 43210
Major = 11267
Overloads= 654

+

ok

UPS identification screen

This screen displays:

• The UPS family and the power range.

• The software version.

• The serial number.

metering

alarms

parameters

UPS IDENTIFICATION

SG Series S0 30kVA

SW Version: x.xx

S/N: P0030-2003-0001

+

ok

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6.2 ALARMS

The alarms mode is entered any time the

The LCD will display a series of screens corresponding to the last 256 events, one event per
screen.

The buttons perform the following functions:

metering Abandons alarms mode and enters metering mode.

alarms Next screen.

parameters Abandons the alarms mode and enters the parameters mode.

+ Scrolls forward to the next screen.

– Scrolls backward to the previous screen.

ok Display the main screen for this mode.

The events displayed are the standard

(Alarms and Messages)

The information displayed includes:

.

alarms

GE events as described in the Section 6.7 - EVENTS

button is pressed.

GE

• The exact date and time when the event occurred.

• The number of the event, 255 being the most recent event, and 0 the oldest.

• The standard GE code for the event and the machine status word.

An explicit text description of the event.

•

metering

alarms

parameters

The initial screen of this mode is the one showing the most recent event.

01.10.2002 22:11:51
NR=255 Status=4A61

4115:LOW BATTERY

VOLTAGE

+

ok

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6.3 PARAMETERS

The parameters mode is entered any time the parameters button is pressed.

The LCD will display a series of screens containing the user parameters, accessible without
password protection.

The buttons perform the following functions:

metering Abandon parameters mode and enter metering mode.

alarms

parameters Scroll forward to the next screen.

+ Scroll forward to the next screen.

– Select from the current screen the parameter to edit.

ok Start the editing for the currently selected parameter.

Example of operation within parameters mode:

Purpose: to correct a wrong telephone number previously stored in Tel2.

1 – entering parameters mode (parameters). The first screen is displayed.

2 – scroll to the next screen (+). The second screen is displayed.

3

4 – move the selection (underscore cursor) to the next parameter in this page (-).

5 – move the selection to the next parameter in page (-).

6

Abandon parameters mode and enter alarms mode.

During parameters mode there is no means to perform scroll back on the
display.

– scroll to the next screen (+). The third screen is displayed.

– enter Edit mode for the currently selected parameter (ok).

metering

1

alarms

parameters

DATE AND TIME

D M Y
Date: 01
Time: 12:45:07

.10.2002

metering

2

alarms

parameters

PROTOCOL SETUP

Modem enabled=N
Init=BEQV1X3&D0S0=2
Alarm= N Delay=22s

+

–

ok

+

ok

GE

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