Toshiba G9000 SERIES User manual

UNINTERRUPTIBLE POWER SYSTEM (UPS)
G9000 SERIES
INSTALLATION AND
OPERATION MANUAL
480/480 V 1000/1330/1500/1660/2000kVA
Document No.: 91649-007
Reference: 4GBH0118 Rev. A
August 2017

i G9000 1000-2000kVA Installation and Operation Manual 91469-007
G9000 SERIES
INSTALLATION AND OPERATION MANUAL
480/480 V 1000/1330/1500/1660/2000 kVA
Document No. 91469-007
Reference: 4GBH0118 Rev. A
August 2017

G9000 1000-2000kVA Installation and Operation Manual 91469-007 ii
The Instructions contained in this manual are not intended to cover all of the details or variations
in equipment or to provide for every possible contingency to be met in connection with
installation, operation, or maintenance. Should further information be required or should
particular problems arise which are not covered sufficiently the matter should be referred to the
local TOSHIBA sales office.
The contents of this instruction manual shall not become a part of or modify any prior or existing
equipment, commitment, or relationship. The sales contract contains the entire obligation of
TOSHIBA INTERNATIONAL CORPORATION. The warranty contained in the contract between
the parties is the sole warranty of TOSHIBA, and any statements contained herein do not create
new warranties or modify the existing warranty.
Any Electrical or mechanical modifications to this equipment without prior
written consent of TOSHIBA will void all warranties and may void UL/CUL listing.
Unauthorized modifications may also result in equipment damage, personal
injury, or loss of life.
IMPORTANT NOTICE
UNINTERRUPTIBLE POWER SYSTEM
If additional information or technical assistance is required call TOSHIBA Customer Support Center toll
free at 1- 877-867-8773, or write to: Toshiba International Corporation, 13131 West Little York Road,
Houston, TX 77041-9990: Attn: UPS Product Manager.
Please complete the following information for your records. Unless otherwise specified on the warranty
card, the warranty period for the UPS or UPS part is 36 months from the shipment date (see bill of
lading).
Unless otherwise specified on the warranty card, the warranty period for a UPS battery is 36 months
full replacement, and an additional 7 years pro-rated from the shipment date (see bill of lading).
Keep this manual with the UPS equipment.
Job Number:
Model Number:
Serial Number:
Application:
Shipping Date:
Date of Installation:
Inspected By:

iii G9000 1000-2000kVA Installation and Operation Manual 91469-007
Purpose and Scope of Manual
This manual provides information on how to safely install, operate, and maintain your TOSHIBA power
electronics product. This manual includes a section on General Safety Instructions that describes the
warning labels and symbols that are used throughout the manual. Read the manual completely before
installing, operating, or performing maintenance on this equipment.
This manual and the accompanying drawings should be considered a permanent part of the equipment
and should be readily available for reference and review. Dimensions shown in the manual are in
metric and/or the English equivalent.
TOSHIBA reserves the right, without prior notice, to update information, make product changes, or to
discontinue any product or service identified in this publication.
TOSHIBA is a registered trademark of TOSHIBA INTERNATIONAL CORPORATION. All other product
or trade references appearing in this manual are registered trademarks of their respective owners.
TOSHIBA shall not be liable for technical or editorial omissions or mistakes in this manual. Nor
shall it be liable for incidental or consequential damages resulting from the use of information
contained in this manual.
This manual is copyrighted. No part of this manual may be photocopied or reproduced in any form
without the prior written consent of TOSHIBA INTERNATIONAL CORPORATION.
© Copyright 2017 TOSHIBA INTERNATIONAL CORPORATION
All rights reserved.
Printed in Japan
Contacting TOSHIBA Customer Support Center
The TOSHIBA Customer Support Center can be contacted to obtain help in resolving any
Uninterruptible Power System problem that you may experience or to provide application
information.
The center is open from 8 a.m. to 5 p.m. (CST), Monday through Friday. The Support Center’s toll free
number in USA is [phone].
You may contact TOSHIBA by writing to:
TOSHIBA INTERNATIONAL CORPORATION.
SOCIAL INFRASTRUCTURE SYSTEMS GROUP
POWER ELECTRONICS DIVISION
13131 West Little York Rd.
Houston, TX 77041-9990
Attn: UPS Product Manager
www.toshiba.com/tic/industrial-systems/uninterruptible-power-systems

iv G9000 1000-2000kVA Installation and Operation Manual 91469-007
Table of Contents
List of Tables.........................................................................................................................................v
1How To Use This Manual..............................................................................................................1
2Introduction ...................................................................................................................................2
2.1 Safety Precautions..............................................................................................................3
3General...........................................................................................................................................6
3.1 Definitions............................................................................................................................7
3.2 Operation Overview.............................................................................................................8
3.2.1 Normal Operation: Load Power Supplied By Each System UPS Inverter ..........................8
3.2.2 Bypass Operation: Load Power Supplied Through UPS Internal Static Bypass Line. .....10
3.2.3 Battery Operation: Load Power Supplied by UPS battery. ...............................................11
3.2.4 Battery Charging Operation ..............................................................................................13
3.2.5 UPS Parts Location...........................................................................................................14
3.3 Specifications....................................................................................................................18
4Operator Controls and Indicators..............................................................................................21
4.1 LED Display.......................................................................................................................22
4.2 EPO Button (Emergency Power Off Button).....................................................................22
4.3 Liquid Crystal Display........................................................................................................23
4.3.1 Menu .................................................................................................................................23
4.3.2 Input Power Failure...........................................................................................................26
4.3.3 Fault Indication..................................................................................................................27
4.4 External Aux Contact Input and Output Terminal Blocks..................................................28
4.4.1 Aux Contacts - Input..........................................................................................................28
4.4.2 Aux Contacts - Output.......................................................................................................31
4.5 RemotEye®4 Introduction.................................................................................................33
5Installation And Operation .........................................................................................................36
5.1 Transportation and Installation..........................................................................................36
5.2 Installation Procedure .......................................................................................................36
5.3 Procedure for Cable Connections.....................................................................................37
5.4 Operating Procedures.......................................................................................................49
6Response To Ups Failure ...........................................................................................................53
7Parts Replacement......................................................................................................................54
7.1 Recommended Maintenance ............................................................................................54
7.2 Battery...............................................................................................................................54
7.3 UPS Component Parts......................................................................................................54
7.4 Air Filters ...........................................................................................................................55
8Fault Codes..................................................................................................................................55
8.1 Bypass Module Fault Codes .............................................................................................56
8.2 Ups Module Fault Codes...................................................................................................60
9Daily Inspection...........................................................................................................................63
Appendix A Installation Planning Guides (IPG) ..........................................................................64

G9000 1000-2000kVA Installation and Operation Manual 91469-007 v
List of Tables
Table 2–1 UPS Installation Environment..............................................................................................4
Table 2–2 Rating of Bypass Input Circuit Breaker (100% Rated)........................................................5
Table 3–1 Power Specifications.........................................................................................................18
Table 3–2 UPS Cabinet Information...................................................................................................18
Table 3–3 Specifications ....................................................................................................................19
Table 3–4 Rating of Contactors, Breakers, and Fuses......................................................................20
Table 3–5 AC-AC Efficiency Specifications........................................................................................20
Table 4–1 External Input Functions....................................................................................................30
Table 4–2 External Output Functions.................................................................................................32
Table 4–3 Parts List for UPS Monitoring............................................................................................34
Table 5–1 How to Transport and Install the System ..........................................................................36
Table 5–2 List of UPS Weights ..........................................................................................................36
Table 5–3 Maximum Permitted Fault Current ....................................................................................37
Table 5–4 Recommended Cable Quantities at 500kcmil...................................................................40
Table 5–5 Recommended Hardware .................................................................................................40
Table 5–6 Crimp Type Compression Lug...........................................................................................41
Table 5–7 Status of Jumpers on Parallel Interface Board (IFAU-16A) ..............................................48
Table 7–1 Standard Replacement Parts List......................................................................................54
Table 7–2 Replacement Air Filters.....................................................................................................55
Table 8–1 Bypass Module Fault Code List.........................................................................................56
Table 8–2 UPS Module Fault Code List.............................................................................................60
Table 9–1 How to Perform Daily Inspection.......................................................................................63

vi G9000 1000-2000kVA Installation and Operation Manual 91469-007
List of Figures
Figure 3-1 Single Line Diagram - Normal Operation: Load fed by UPS inverter .................................8
Figure 3-2 Single Line Diagram - Bypass Operation: Load Fed Through Static Bypass Line..............10
Figure 3-3 Single Line Diagram - Battery Operation –Load Fed by Battery .....................................11
Figure 3-4 Typical Battery Charging Curve........................................................................................13
Figure 3-5 UPS Parts Location (1000kVA).........................................................................................14
Figure 3-6 UPS Parts Location (1330-1500kVA) ...............................................................................15
Figure 3-7 UPS Parts Location (1660-2000kVA)Description of Parts Location Figures:...................16
Figure 4-1 Operation/Display Panel (Front Panel).............................................................................21
Figure 4-2 Main Screen......................................................................................................................23
Figure 4-3 Start/Stop Operation .........................................................................................................24
Figure 4-4 Start Operation..................................................................................................................24
Figure 4-5 Stop Operation..................................................................................................................24
Figure 4-6 Input Values......................................................................................................................24
Figure 4-7 Output Values ...................................................................................................................24
Figure 4-8 Remote/Local Operation or Date & Time Adjustment Select ...........................................25
Figure 4-9 Log Menu..........................................................................................................................25
Figure 4-10 Event Log........................................................................................................................25
Figure 4-11 Battery Log......................................................................................................................25
Figure 4-12 Main Screen (On Battery) ...............................................................................................26
Figure 4-13 Measurement Screen ( On Battery)................................................................................26
Figure 4-14 Main Screen (Fault Indication)........................................................................................27
Figure 4-15 Message Screen.............................................................................................................27
Figure 4-16 Control Wiring for Aux Input Contacts ............................................................................28
Figure 4-17 External Signal Input Terminal Block (with default settings)...........................................29
Figure 4-18 Control Wiring for Aux Output Contacts..........................................................................31
Figure 4-19 External Signal Output Terminal Block (with default settings)........................................31
Figure 4-20 RemotEye® 4 Installation (Overview).............................................................................33
Figure 4-21 Detailed Configuration of RemotEye® Installation..........................................................34
Figure 4-22 Connection Between IOAU-19 PCB (IO1) and RemotEye® Module...............................35
Figure 4-23 Communication Connector (CN2, Dsub-9) on N002 ......................................................35
Figure 4-24 VH Connector (CN85) on IOAU-19 PCB (IO1)...............................................................35
Figure 5-1 UPS Terminal Designation................................................................................................41
Figure 5-2 Diagram of Input/Output Bus Bars and Terminal Blocks (1000kVA)................................42
Figure 5-3 Diagram of Input/Output Bus Bars and Terminal Blocks (1330-1500kVA).......................43
Figure 5-4 Diagram of Input/Output Bus Bars and Terminal Blocks (1660-2000kVA).......................44
Figure 5-5 Diagram of Power Wire & Control Wire Inter-Connect between UPS and Battery...........45
Figure 5-6 Diagram of Power Wire Connections (Parallel System Configuration).............................46
Figure 5-7 Diagram of Power Wire & Control Wire Connection (Parallel system connection 2x to 6x)
.......................................................................................................................................................47
Figure 5-8 Detail of IFAU-16A Control Wire Connections for N units in MMS Configuration ............48
Figure 5-9 LCD Screen (MMS Operation)..........................................................................................52

G9000 1000-2000kVA Installation and Operation Manual 91469-007 1
1 How To Use This Manual
This manual is designed for ease of use, giving the user easy and quick reference to information.
This manual uses notice icons to draw attention to the user important information regarding the safe
operation and installation of the UPS. The notice icons used in this manual are explained below, and
should be taken into account and adhered to whenever they appear in the text of this manual.
Warning: A warning symbol shows potentially hazardous situation or condition
which could result in personal injury or death, if not avoided.
Caution: A caution symbol shows potentially hazardous situation or condition
which could result in personal injury or equipment damage, if not avoided.
Note: A Note symbol shows the information the user or the service personnel
should observe during the UPS operation or service work.
Prohibit: A prohibit symbol shows the act the user or the service personnel should
NEVER perform during the UPS installation, operation or service work.
Safety Recommendations: If any problems are encountered while following this manual, Toshiba
field service group assistance and correspondence is recommended.
WARNING
CAUTION
!
NOTE
PROHIBIT

2 G9000 1000-2000kVA Installation and Operation Manual 91469-007
2 Introduction
The Toshiba Uninterruptible Power Supply System (UPS) is designed to provide many years of
reliable protection from power failure, brown-outs, line noise, and voltage transients. To ensure
optimum performance of the equipment, follow the manufacturer's instructions. This manual
contains instructions required to operate the UPS. Please read this manual carefully and retain it
for future reference.
This manual contains important instructions for the G9000 Series Uninterruptible Power Supply
System that should be followed during installation, operation, and maintenance of the UPS and
batteries.
Lethal voltages exist within the equipment during operation. Observe all
warning and cautions in this manual. Failure to comply may result in serious
injury or death. Obtain qualified service for this equipment as instructed.
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
WARNING 1
CAUTION
WARNING

G9000 1000-2000kVA Installation and Operation Manual 91469-007 3
In no event will TOSHIBA be responsible or liable for either indirect or consequential
damage or injury that may come from the misuse of this equipment.
Do not modify the UPS entirely or partially.
Any modifications without authorization by TOSHIBA could result in
personal injuries, death or destruction of the UPS.
2.1 Safety Precautions
APPLICATION
This UPS shall NOT be applied to support equipment (*) that could affect human
lives. * Medical operation room equipment
Life support equipment (artificial dialysis, incubators, etc.)
Toxic gas or smoke eliminators
Equipment that must be provided under fire laws, construction
standards or other ordinances
Equipment equivalent to the above
Special considerations are required when applying this UPS to equipment (**)
that affects human safety and/or maintain public services.
** Equipment to supervise or control airways, railways, roads,
sea-lanes or other transportation.
Equipment in nuclear power plants.
Equipment to control communications.
Equipment equivalent/similar to the above mentioned.
WARNING 2
PROHIBIT
!
NOTE
WARNING
PROHIBIT

4 G9000 1000-2000kVA Installation and Operation Manual 91469-007
The UPS is to be installed in a controlled environment.
Improper storage and installation environment may deteriorate insulation, shorten
component life and cause malfunctions.
Keep the installation environment per standard described as follows:
Table 2–1UPS Installation Environment
No
Item
Environment standard
1
Installation
Location
Indoors
2
Ambient
temperature
Minimum temperature: 32F(0C)
Maximum temperature: 104F(40C)
The average temperature over any 24-hour period must be in the range
41F (5C) to 95F(35C).
3
Relative humidity
The relative humidity must be held between 5 and 95%.
There must be no condensation due to temperature changes.
4
Altitude
This equipment is designed to operate without derating at 1980m (6500ft)
above sea level.
5
Dust
Dust in the room where the UPS is installed must not exceed normal
atmospheric dust levels. In particular, that dust should not include iron
particles, oils or fats, or conductive materials such as silicone.
6
Inflammable gas
following
IEC654-4
Part 4
There should be no inflammable/explosive gas.
Hydrogen sulfide (H2S)
No more than 0.003 PPM
Sulfurous acid gas (SO2)
No more than 0.01 PPM
Chlorine gas (Cl2)
No more than 0.002 PPM
Ammonia gas (NH3)
No more than 1 PPM
Nitrous oxides (NOx)
No more than 0.05 PPM
Ozone (O3)
No more than 0.002 PPM
WARNING 3
4
WARNING

G9000 1000-2000kVA Installation and Operation Manual 91469-007 5
This UPS does not include a Bypass input circuit breaker (MCCB) to protect
bypass circuit. The Bypass input circuit breaker (MCCB) is to be field supplied
and installed. Recommended Breaker (MCCB)'s Specifications are as follows:
Table 2–2Rating of Bypass Input Circuit Breaker (100% Rated)
Capacity
(kVA)
Bypass Voltage
(V)
Bypass Rating
(A)
Breaker
(A)
1000
480
1203
1600
1330
480
1600
2000
1500
480
1804
2000
1660
480
1997
2500
2000
480
2406
3200
AC input and AC output overcurrent protection and disconnect devices shall be field
supplied and installed. The DC circuit breaker (MCCB) shall be field supplied and installed.
The overcurrent protection device should be installed in the Battery cabinet and rated as
indicated in Table 3–4.
WARNING 4
WARNING

6 G9000 1000-2000kVA Installation and Operation Manual 91469-007
3 General
The TOSHIBA G9000 SERIES UPS is designed to provide continuous and clean electrical power
to a critical load. Additionally the UPS monitors power conditions affecting the load. In the event of
an input power failure, the UPS will supply power to the critical load for the specified battery time.
If the input power is not restored promptly, back up power from the UPS battery permits the
orderly shutdown of equipment supported by the UPS. The UPS is simple to start-up, operate and
maintain.
The G9000 SERIES UPS is available in models ranging from 100 to 2000kVA capacities. This
manual covers the 1000-2000 kVA units only. Specifications are shown in Section 3.3.
This manual provides an overview of the G9000 SERIES components and their functions. The
appearance and purpose of operator controls and indicators is described with procedures for
operation, start-up, shutdown and basic maintenance included.

G9000 1000-2000kVA Installation and Operation Manual 91469-007 7
3.1 Definitions
UNINTERRUPTIBLE POWER SUPPLY SYSTEM (UPS) - All components within the UPS
Cabinet, ancillary cabinets, and associated batteries that function as a system to provide
continuous, conditioned AC power to a load. This is sometimes referred to as the "System".
UPS CABINET –The metal enclosure which is the main part of UPS and composed of the
Bypass module, the 3～6 UPS modules, and the Cable Entry Section.
LINK CABINET –The metal enclosure in which buses between separately shipped UPS modules
are connected.
UPS MODULE - The metal enclosure which contains the Converter / Inverter, Charger, and
internal control systems required to provide specified AC power to a load.
CONVERTER / INVERTER - The UPS components which contain the equipment and controls
necessary to convert input AC power to output AC power required by the critical load.
CHARGER - The UPS components which contain the equipment and controls necessary to
regulate DC power required for battery charging and for supplying power to the Inverter.
BYPASS MODULE - The metal enclosure which contains the Bypass line, the static transfer
switch, UPS operator controls, and internal control systems.
BYPASS LINE - The line which conducts electricity directly from the input power source to the
critical load during maintenance or whenever the UPS is not operating in double conversion
mode.
STATIC TRANSFER SWITCH - The device which connects the critical load to the bypass line
when the Inverter cannot or should not supply continuous power to the load.
AC INPUT POWER - Power provided by the electrical utility company, or auxiliary generator,
which is connected to the UPS Converter & Bypass for supplying the critical load.
BATTERY - The rechargeable battery strings which supply DC power to the inverter to maintain
continuous AC power to the load during AC input power failure conditions.

8 G9000 1000-2000kVA Installation and Operation Manual 91469-007
3.2 Operation Overview
The UPS provides two power paths between the utility source and the critical load.
Figure 3-1 shows the path for normal operation, with the load powered by the inverter.
Figure 3-2 shows the path for bypass operation, with the load supplied through the static bypass
line. Figure 3-3 shows the path for battery operation, with the load powered by the inverter.
3.2.1 Normal Operation: Load Power Supplied By Each System UPS Inverter
Figure 3-1 Single Line Diagram - Normal Operation: Load fed by UPS inverter
During normal operation, the path through the UPS inverter is used to power the load.
In Figure 3-1 input AC power is converted to DC by the Converter. DC power is utilized to
charge the UPS battery and to provide power to the Inverter. The Inverter converts the DC
power to regulated AC power to supply the critical load.
Bypass Module
CB
3
CONVERTER / INVERTER
CHARGER
52
C
Static Transfer
Switch
52
S
CB
1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52
C
CB
1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52
C
CB
1
CB2
UPS Module
UPS
CABINET
AC
input
Battery
Cabinet
Bypass
Input
CB
Output
supplied
MCCB
User
supplied
MCCB
CB
External
BATTERY
Power Flow
Not in Use
Output
CB
3 ~ 6 UPS
modules

G9000 1000-2000kVA Installation and Operation Manual 91469-007 9
The conversion - inversion process eliminates any voltage transients or fluctuations existing
in the input power before it reaches the critical load.
The power drawn by the critical load is equally shared between all UPS systems when
multiple UPSs are in Parallel Operation. (Refer to
Figure 5-6 that shows a sample of Parallel Operation System Configuration.)
When in Parallel Operation, the rectifier inputs to all G9000 UPS Systems
in the Multi-Module System (MMS)-must be fed from a single source at
all times including any operation of Automatic Transfer Switches. All
G9000 bypass inputs must also be fed from a single source at all times
(not necessarily the same source as the rectifier inputs).
In the event of a UPS module failure during Parallel Operation, the critical load power will be
continually supplied and shared by all other UPS.
The Bypass Input breaker and cables are to be supplied and installed by
the user or contractor. (See WARNING 4 on page 5)
!
NOTE
CAUTION

10 G9000 1000-2000kVA Installation and Operation Manual 91469-007
3.2.2 Bypass Operation: Load Power Supplied Through UPS Internal Static Bypass Line.
Figure 3-2 Single Line Diagram - Bypass Operation: Load Fed Through Static Bypass Line
Figure 3-2 shows the Internal Bypass line is a hard-wired line through 52S which supplies the
critical load with unconditioned bypass input power. Upon switching to the Internal Bypass
line, the Static Transfer Switch line through CB3 (herein after STS contactor CB3) supplies
the power immediately, and then the Internal Bypass line through 52S supplies the power. In
the event of switching to the Bypass line, the power to the critical load will be uninterrupted.
The purpose of this Internal Bypass line is to route power to the critical load while the UPS
module is de-energized either purposely or due to a failure (converter and inverter) and
during Start-up before the system is fully operational.
In the case of Parallel Operation, internal static bypass line of each UPS will equally share
the power supplied to the critical load whenever each cable length of bypass line is equal. In
case that the cable length is unable to be equalized or kept within 5% difference, additional
reactors will be necessary to compensate the difference in cable impedance.
Bypass Module
CB
3
CONVERTER / INVERTER
CHARGER
52
C
Static Transfer
Switch
52
S
CB
1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52
C
CB
1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52
C
CB
1
CB2
UPS Module
UPS
CABINET
AC
Input
Bypass
Input
CB
User
supplied
MCCB
User
supplied
MCCB
CB
Power Flow
Not in Use
Output
Battery
Cabinet
External
BATTERY
CB
3 ~ 6 UPS
modules

G9000 1000-2000kVA Installation and Operation Manual 91469-007 11
In the event of a load overcurrent, the UPS transfers to bypass without interruption to the
critical load. In the case of the Parallel Operation, all UPS will transfer to bypass without
interruption to the critical load.
The internal control system determines the operation of the two paths, with the load powered
from the inverter being the normal operation.
3.2.3 Battery Operation: Load Power Supplied by UPS battery.
Figure 3-3 Single Line Diagram - Battery Operation –Load Fed by Battery
Figure 3-3 shows that in the event of AC input source failure or interruption, the UPS
Converter(s)* will de-energize and the UPS battery(s)* will immediately supply DC power to
the Inverter to maintain continuous AC power to the load. This operation will continue until:
a) The battery capacity expires and the inverter turns off, or
b) Input power is restored. When input power is restored the converter will simultaneously
power the inverter and recharge the batteries.
A fully charged battery will provide power for the specified time at the rated load, or longer, at
Bypass Module
CB
3
CONVERTER / INVERTER
CHARGER
52
C
Static Transfer
Switch
52
S
CB
1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52
C
CB
1
CB2
UPS Module
CONVERTER / INVERTER
CHARGER
52
C
CB
1
CB2
UPS Module
UPS
CABINET
AC
input
Bypass
Input
CB
supplied
MCCB
User
supplied
MCCB
CB
Power Flow
Not in Use
Output
Battery
Cabinet
External
BATTERY
CB
3 ~ 6 UPS
modules

12 G9000 1000-2000kVA Installation and Operation Manual 91469-007
a reduced load. * (s) : In the case of the Parallel Operation
When power is restored after a low battery shutdown, the UPS converter(s) automatically
restarts operation, the charger(s) recharges the batteries and the Inverter(s) is automatically
restarted without operator intervention. Load is automatically assumed by the inverter
without operator intervention. * (s) : In the case of the Parallel Operation
When in Parallel Operation, the power drawn by the load is equally shared between all UPSs
regardless of whether or not any units are in Battery Operation.