Kohler powerwave 8000dpa S2 ST-60 User manual

PowerWAVE 8000DPA
User Manual
S2 (10-200 kW)

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
Document Control
PDF ISSUE DATE REVISION SUMMARY
TS_616_00 11/10/16 New Issue (Revision 00).
TS_616_01 20/01/17 Updated clearances and battery cabinet details
TS_616_02 21/03/17 Updated ST120 terminal details
TS_616_03 04/04/18 Added external MBP interlocking details to Chapter 7, and corrected spelling

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
Uninterruptible Power Supplies Ltd has taken every precaution to
produce an accurate, complete and easy to understand manual and will
therefore assume no responsibility nor liability for direct, indirect or
accidental personal or material damage due to any misinterpretation of or
accidental mistakes in this manual.
© 2016 Uninterruptible Power Supplies Ltd
This manual may not be copied or reproduced without written permission
of Uninterruptible Power Supplies Ltd.
USEFUL CONTACTS
www.upspower.co.uk UPS Limited web site
[email protected] Service department – booking service, fault reporting etc.
[email protected] Technical queries
[email protected] Hardware sales
[email protected] Extended warranty agreements etc

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 I
Table of Contents
Safety 1
1.1 Description of symbols used in this manual 1-1
1.2 User precautions 1-1
General Description 2
2.1 General introduction 2-2
2.1.1 Reliability and quality standards 2-2
2.1.2 Advanced design features 2-2
2.1.3 Model range 2-3
2.2 Functional description of operation 2-4
2.2.1 UPS Power module internal operation 2-4
2.2.2 UPS Power module operational states 2-5
2.2.3 UPS system operation 2-6
2.2.4 Parallel system operation 2-7
2.3 Module component identification 2-9
2.4 UPS Interface boards 2-14
2.4.1 Customer Interface Board 2-14
2.4.2 Parallel Interface Board 2-14
2.5 Module control panel 2-16
2.5.1 Power Management Display (PMD) 2-16
2.5.2 Mimic LED indicators 2-16
2.5.3 Operator keys 2-17
2.6 Description of the LCD display 2-18
2.6.1 Status screens 2-18
2.6.2 Main menu screen 2-18
2.6.3 Event log menu screen 2-18
2.6.4 Measurements menu screen 2-19
2.6.5 Commands menu screen 2-20
2.6.6 UPS Data menu screen 2-20
2.6.7 Set-up User menu screen 2-21
2.6.8 Set-Up Service menu screen 2-21
2.7 Optional system control panel 2-22
2.7.1 Display header bar 2-23
2.7.2 Mimic diagram – system level 2-24
2.7.3 Module selection screen 2-25
2.7.4 Home screen 2-27
2.8 Warranty 2-29
2.8.1 Extended warranty 2-29
2.8.2 Additional service/maintenance support 2-29
Installation 30
3.1 Introduction 3-30
3.2 Taking receipt of the UPS 3-30

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II TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
3.2.1 Reporting transpiration damage 3-30
3.2.2 Local site transportation 3-31
3.2.3 Storage 3-31
3.2.4 Unpacking 3-31
3.2.5 Batteries 3-32
3.3 Positioning 3-32
3.3.1 Planning the installation 3-32
3.3.2 Clearances 3-32
3.4 UPS Power Cabling (preparation and planning) 3-35
3.4.1 General requirements 3-35
3.4.2 Cable sizing 3-35
3.4.3 Parallel cabinet cabling recommendations 3-39
3.4.4 External maintenance bypass 3-40
3.5 Connecting the UPS AC power cables 3-41
3.5.1 Safety notes 3-41
3.5.2 Preparing the UPS power cabling 3-41
3.5.3 Connecting the UPS input power cables 3-41
3.5.4 Preparing the output power cabling 3-42
3.5.5 Connecting the UPS output cables 3-42
3.6 Battery configuration 3-44
3.6.1 Battery configuration options 3-44
3.6.2 Battery cabling 3-44
3.6.3 Internal battery configuration for ST-40 and ST-60 cabinets 3-45
3.7 Customer Interface Board 3-47
3.8 Parallel-cabinet control and configuration 3-48
Operation 50
4.1 Introduction 4-50
4.1.1 Commissioning 4-50
4.1.2 Operating procedure summary 4-50
4.1.3 General warnings 4-51
4.2 Operating instructions 4-51
4.3 How to start the UPS system from a fully powered-down condition 4-51
4.4 How to start the UPS system from the maintenance bypass 4-53
4.5 How to transfer load to maintenance bypass then shut down the UPS system 4-54
4.6 How to shut down the complete UPS system 4-55
Maintenance 56
5.1 Introduction 5-56
5.2 User responsibilities 5-56
5.3 Scheduled maintenance 5-56
5.3.1 Preventative maintenance inspection 5-56
5.3.2 System calibration 5-56
5.3.3 Battery maintenance and testing 5-57
Troubleshooting 58
6.1 Alarms 6-58
6.2 Menu, Commands, Event Log, Measurements, 6-58
6.3 Fault identification, rectification messages and alarms 6-58
6.4 Contacting service 6-59

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 III
:
Options 60
7.1 Introduction 7-60
7.2 Remote shut down 7-60
7.3 Generator ON facilities 7-61
7.4 UPS Monitoring and automated control software 7-61
7.4.1 SNMP Card slots 7-61
7.5 Remote interlock (for external maintenance bypass only) 7-62
Specification 63
8.1 Mechanical characteristics – UPS Cabinet 8-63
8.2 System data 8-64
8.3 UPS Power module data 8-66
8.4 Battery data 8-66
8.5 Standards 8-67
8.6 Options 8-67

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IV TS_616_03 PW8000DPA ST S2 User Manual 4/4/18

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 1
1Safety
1.1 Description of symbols used in this manual
1.2 User precautions
WARNING: The warning symbol is used where there is danger of an electrical shock, equipment damage or
personal-injury.
CAUTION: The caution symbol is used to highlight important information to avoid possible equipment
malfunction or damage.
WARNING: Keep this manual with the UPS for future reference.
WARNING: The UPS and peripheral equipment must be installed and commissioned by suitably qualified and
trained personnel who are aware of the potential shock hazards.
WARNING: Do not attempt to install this UPS system until you are satisfied that ALL the safety instructions and
hazard warnings contained in this manual are read and fully understood.
WARNING: High leakage current!
Ensure that the UPS has been correctly earthed before you connect the mains power supply!
WARNING: This UPS must not be started-up or put into use without having first been commissioned by a fully
trained engineer authorised by the manufacturer.
WARNING: All servicing must be performed by qualified personnel. Do not attempt to service the UPS yourself.
You run risk of exposure to dangerous voltages by opening or removing the UPS-covers! Uninterruptible Power
Supplies Ltd will assume no responsibility nor liability due to incorrect operation or manipulation of the UPS.
WARNING: The PW8000DPA ST S2 is a Class A UPS product (according to BS EN 62040). In a domestic
environment the UPS may cause radio interference. In such an environment the user may be required to
undertake additional measures.

2TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
2General Description
2.1 General introduction
Congratulations on your purchase of the PW8000DPA ST S2 Uninterruptible Power Supply system.
2.1.1 Reliability and quality standards
Using a unique modular construction, the PW8000DPA ST S2 represents a completely new generation of medium power,
3 phase UPS-Systems, incorporating the latest technological developments in power engineering. High reliability, upgrade
ability, low operating costs and excellent electrical performance are only some of the highlights of this innovative UPS
solution.
Uninterruptible Power Supplies Ltd. specialises in the design, building, installation and maintenance of Uninterruptible
Power Systems. This compact and powerful UPS is just one example of our wide range of state-of-the-art power
protection devices and will provide your critical equipment with a steady and reliable power supply for many years.
The criteria and methods we use in the design, manufacture, and maintenance of Uninterruptible Power Supply systems
are certified to International Standard ISO 9001/EN 29001 and ISO 14001. A full UPS Specification is provided in Chapter
8 of this manual.
2.1.2 Advanced design features
Input booster technology
The UPS module’s inbuilt advanced booster technology results in a perfect sinusoidal input power quality at 0.99 input
power factor with a harmonic content of <4.5% THD(i) (10KW module) and <3% THD(i) (20KW module). This leads to a
more reliable overall system operation and savings in generator and transformer sizing, as winding losses are minimised.
It also means that traditional harmonic filters are no longer required.
The high power factor presented by the UPS on the incoming mains supply minimises cabling and fusing costs due to the
minimised reactive power consumption. This, together with the accompanying low harmonic currents, provide the
following benefits:
• No additional losses in wires and cables
• No extra heating of transformers and generators
• No over sizing of generators
• No false circuit breaker tripping and malfunction
• No erratic operation of computers, telecommunication, monitors, electronic test equipment etc.
• No resonance with power factor correction capacitors
Decentralized Parallel Architecture (DPA)
The PW8000DPA ST S2 system features Decentralized Parallel Architecture (DPA) paralleling technology that provides
n+x redundancy without introducing a single-point-of-failure. Each power module is a fully functional, self-contained UPS
that includes an individual battery charger, power inverter, bypass, CPU, control panel and separate battery configuration;
making it a completely autonomous operating unit.
Flexible battery management
This equipment employs flexible battery charging management which avoids premature deterioration of battery life and
provides preventive failure diagnostics.
The major benefits are:
• AC-ripple free battery charging due to a dc-dc charger separated from the rectifier and inverter.
• Wide range of number of battery blocks (30-50 blocks of 12V; depending autonomy times).

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 3
2: General Description
• Wide UPS input voltage operating window extends the battery life due to fewer discharge cycles.
• Battery discharge protection caused by load jumps.
• Proactive battery protection from false manipulations and inadequate charging voltages.
• Proactive battery failure detection thanks to Advanced Battery Diagnosis (ABD) algorithm.
• User selectable battery tests.
• Optional temperature compensated charging to enhance battery life.
2.1.3 Model range
Figure 2.1 PW8000DPA ST S2 module configuration
The PW8000DPA ST S2 is a truly flexible system based on 10kW or 20kW UPS power modules which are assembled in a
range of purpose-designed, free-standing cabinets containing up to ten UPS modules. The cabinet is rated according to
the maximum number of 20kW modules that it can house – i.e. 40kW, 60kW, 80kW, 120kW and 200kW (see Figure 2.1).
The 40kW and 60kW cabinets also contain the UPS batteries but these must be located externally in the case of the
80kW, 120kW and 200kW models. A range of matching battery cabinets is available.
The illustrations in Figure 2.1 show the various cabinets fully populated; however each of the systems shown can operate
with as little as a single module fitted. Further power modules can be added to a vacant slot at a later time, without
needing to power-down the system or in any way disrupt the load. This ‘hot-swappable’ technology also allows individual
modules to be exchanged for testing or troubleshooting while the equipment is running without having to transfer the load
to the bypass supply – depending on prevailing system redundancy and load demand.
Key Point: All the modules fitted within a cabinet must be of the same rating – i.e. it is not possible to mix 10kW
and 20kW modules in the same parallel system.
ST-40 Cabinet ST-60 Cabinet ST-80 Cabinet ST-120 Cabinet
2x modules
80 Batteries
3x modules
240 Batteries
4x modules
No Batteries
6xmodules
No Batteries
ST-200 Cabinet
10x modules
No Batteries

2: General Description
4TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
2.2 Functional description of operation
This section describes:
• A block-diagram level description of the UPS module’s internal operation (see paragraph 2.2.1).
• The various operational states of a UPS power module (see paragraph 2.2.2).
• UPS system operation – ‘ON-LINE’ versus ‘OFF-LINE’ UPS system operation (see paragraph 2.2.3).
• Multi-module system operation and paralleling considerations (see paragraph 2.2.4).
2.2.1 UPS Power module internal operation
Figure 2.2 UPS module functional block diagram
Input and output contactors
The input contactor is electronically controlled by the UPS operating system and connects the mains input supply to the
rectifier block. This contactor operates during the module’s controlled start-up and shut down sequence and isolates the
rectifier from the mains following certain fault events.
Similarly, the output contactor allows control over the connection between the inverter and the UPS output (load). In
addition to being employed during the module’s start/stop sequence it is also used during load transfer between the
inverter and bypass supply and to isolate the UPS module following certain fault conditions.
Rectifier
The rectifier uses leading-edge switched-mode techniques which results in a module input power factor of almost unity
over its operating range (0.99 at full rated linear load). It converts the UPS mains input to a regulated DC power source
that can satisfy the inverter power demands (at 100% load) over an input voltage range of -20% to +15%. This wide input
voltage operating range means that the battery is not called upon during substantial power dips (brown outs), which in turn
maximises the battery life and availability.
DC Boost converter
The DC boost converter converts the DC voltage connected to its input, from either the rectifier or battery, into a regulated
DC bus suitable for powering the inverter.
Battery charger
A multi-stage battery charger, powered from the DC boost converter output, charges the battery whenever the input
supply is available and the rectifier/DC boost converter is turned on. The charger uses an intelligent charging profile to
obtain the best battery charge/discharge performance in order to optimise the battery life.
Inverter
The inverter converts the regulated DC voltage produced by the DC boost converter into a sinusoidal AC output voltage
suitable for connecting to the load. In addition to providing output voltage regulation, the inverter control logic also
provides various levels of overload protection, frequency regulation and synchronisation, and output voltage error
detection.
AC/DC (PFC)
RECTIFIER
DC BOOST
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
BATT. CHARGER
UPS
Mains
Input
UPS
Bypass
Input
UPS AC
Output
Automatic
Batt. Switch

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 5
2: General Description
Static switch
The static switch provides a means of connecting the UPS module output to the bypass line – which is connected to the
UPS bypass input supply. Working in conjunction with the output contactor, the static switch control logic is used to
transfer the UPS output between the inverter and bypass supply without a break in the load supply.
Note: A brief load break will occur if transferring from bypass to inverter following a bypass supply failure, or if the bypass/
inverter are not synchronised when a transfer is demanded. (See ‘Off Line Mode’ in section 2.2.3).
Automatic battery switch
If the UPS mains input supply fails, the battery is automatically connected to the input of the DC boost converter by means
of an electronically controlled switch. This enables the inverter to continue its normal operation and maintain the UPS
output load supply from battery power.
2.2.2 UPS Power module operational states
UPS ON-INVERTER mode
Figure 2.3 illustrates the UPS ON-INVERTER
mode, which is considered the ‘normal’ mode of
operation:
• The rectifier and DC boost converter are
turned on to supply controlled DC power to
the inverter input.
• The battery charger charges the battery.
• The inverter converts the DC supplied by
the rectifier back into AC suitable for
connecting to the load.
• The output contactor is turned on to connect
the inverter output to the UPS output
terminals to provide the load with processed
power.
UPS ON-BATTERY mode
The UPS automatically changes to the ON-
BATTERY mode if the mains input supply fails
during normal (ON-INVERTER) operation:
• The battery discharges through the DC
boost converter which regulates the battery
voltage at the level required by the inverter.
• The inverter converts the DC supplied by
the boost converter back into AC suitable
for connecting to the load.
• The output contactor is turned on to connect
the inverter output to the UPS output
terminals to provide the load with processed
power.
AC/DC (PFC)
RECTIFIER
DC BOOST
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
BATT. CHARGER
UPS
Mains
Input
UPS
Bypass
Input
UPS AC
Output
Automatic
Batt. Switch
Figure 2.3 UPS ON-INVERTER
AC/DC (PFC)
RECTIFIER
DC BOOST
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
BATT. CHARGER
UPS
Mains
Input
UPS
Bypass
Input
UPS AC
Output
Automatic
Batt. Switch
Figure 2.4 UPS ON-BATTERY

2: General Description
6TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
UPS ON-BYPASS mode
This mode can be selected by the operator as part
of the system operating procedure. It is also
entered following certain fault occurrences such as
a UPS output overload:
• The load is connected to the raw mains
input supply through the bypass arm of the
static switch.
• The rectifier and inverter remain powered
up and in operational readiness to be
brought into use.
• When operating in this mode the load is not
protected against any mains input supply
disturbances or loss.
2.2.3 UPS system operation
Summary of UPS module operating modes
UPS installations are generally categorised as being either ‘ON-LINE’ or ‘OFF-LINE/On stand-by’ systems; and the
PW8000DPA ST S2 can be configured to operate in either mode. The two systems are described below.
ON-LINE UPS system
An ‘ON-LINE’ system provides the highest degree of load protection, especially in the event of a mains supply disturbance
or complete failure, and we always recommended its use if the critical load (e.g. computer system) will not tolerate even a
very brief supply interruption.
When the PW8000DPA ST S2 is used as an ‘ON-LINE’ UPS it is configured to normally operate in the ON-INVERTER
mode, as shown in Figure 2.3. In the event of a mains supply failure, the UPS changes to its ON-BATTERY mode (Figure
2.4) without affecting its output supply – i.e the changeover to battery operation is totally transparent at the UPS output.
The UPS then continues to provide its rated output until the battery discharges to a low cut-off point, at which time the
UPS will attempt to switch to its ‘on bypass’ mode and, if the bypass is unavailable, then it will shut down in a controlled
manner. An audible and visual alarm will warn that the battery is discharging to enable the operator to take any necessary
intervention to protect the load integrity.
It is usual, especially in larger installations, to provide the UPS with an alternative input supply from a standby generator
which starts automatically following a mains supply failure; and where this is implemented the batteries discharge for a
short period only, until the generator comes on-line. This not only avoids the UPS shutting down due to discharged
batteries but also increases the battery life cycle.
If the UPS experiences an internal fault during ON-LINE operation, the inverter is turned off and the static switch transfers
the load to the bypass line (Figure 2.5) automatically and without interruption provided the inverter and bypass supplies
are synchronised. In the event of an output overload, the inverter can supply the load for a limited time, depending on the
overload severity, and if the permitted time is exceeded the load is transferred to bypass. The additional power available
from the bypass supply will attempt to clear the overload but if it persists it will ultimately rupture the bypass supply fuses.
If the overload condition clears while operating on bypass the load is re-transferred to the inverter and the UPS will return
to its normal ON-LINE mode of operation.
OFF-LINE (On stand-by) UPS system operation
When the PW8000DPA ST S2 is used as an ‘OFF-LINE’ UPS it is normally operated in its ON BYPASS mode (Figure 2.5)
with the load supplied via the bypass line. However the rectifier, DC boost converter and battery charger are still powered
up to maintain battery charging, and the inverter section is turned on and operating on standby.
In the event of a bypass supply failure, the inverter is immediately brought on line and the load is transferred from the
bypass line to the inverter by the static switch within 3 to 5 milliseconds. If the UPS bypass and mains inputs are
connected to separate sources and the mains supply is still live when the transfer takes place then the UPS will operate in
its ON-LINE mode (Figure 2.3). However, if these supplies are connected to a common source the UPS will immediately
revert to its ON-BATTERY mode (Figure 2.4).
AC/DC (PFC)
RECTIFIER
DC BOOST
CONVERTER
DC/AC
INVERTER
STATIC
SWITCH
BATTERY
BATT. CHARGER
UPS
Mains
Input
UPS
Bypass
Input
UPS AC
Output
Automatic
Batt. Switch
Figure 2.5 UPS ON-BYPASS

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 7
2: General Description
When the bypass supply returns to normal, the load is re transferred back to the bypass line and the inverter returns to its
standby operation.
Operating in this mode is slightly more energy efficient than operating in the ON-LINE mode due to the reduced rectifier
and inverter losses during normal system operation; and it is sometimes referred to as the “ECO” (economy) mode.
However, this mode is recommended only if the connected load equipment can tolerate power interruptions of up to 3~5
ms during the transfer period.
Control panel mimic indications
Figure 2.6 Control panel mimic indications
2.2.4 Parallel system operation
The power output from all the modules fitted in a UPS cabinet are connected in parallel at the cabinet’s output terminals,
and the electronics built into each module’s control system ensures that:
• The UPS modules are always frequency-synchronised to each other – and to the bypass supply (when present).
• The UPS modules equally share the load current.
• The static bypass operation is synchronised such that, for example, if the operator selects ‘Bypass’ mode the static
switch in ALL the modules change over in unison.
It is also possible to connect the outputs from several UPS cabinets in parallel to increase the overall system capacity or
provide additional module redundancy – the maximum number of cabinets that can be paralleled is shown in the table
below.
When two or more cabinets are connected in parallel all the power modules within the cabinets are effectively paralleled
together – for example if three fully populated ST-120 cabinets are paralleled then the system effectively contains 18 fully
paralleled UPS power modules.
This requires the same degree of parallel control concerning synchronisation, load sharing, bypass switching etc. as
described for the modules operating in an individual cabinet; and in order to achieve this a parallel communication bus is
daisy chained between the cabinets as illustrated in Figure 2.7.
WARNING: The ON-LINE mode should always be used for critical load protection.
ST-40 ST-60 ST-80 ST-120 ST-200
Number of UPS power modules per cabinet 234610
Parallel cabinets per system 44432
Max number of UPS power modules per system 8 12 16 18 20
Max system capacity (without redundancy) 160 240 320 360 400
LINE 1
LINE 2 BY PASS
INVERTER
BATTERY
LOAD
LINE 1
LINE 2 BY PASS
INVERTER
BATTERY
LOAD
On-Inverter On-Bypass

2: General Description
8TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
System expansion
Some UPS applications present a low initial power requirement which increases over time as the application grows; and it
is therefore essential that the installed UPS system can be expanded to meet the growing demand without compromising
the existing load. This requirement is well met with the ‘hot swappable’ feature of the PW8000DPA ST S2 UPS power
modules, whereby additional module(s) can be inserted into a vacant slot in an existing cabinet. If a system expansion
requires an additional cabinet the system will have to be shut down while the cabinet is installed.
Figure 2.7 Parallel system control
‘Capacity’ system
When a system is described as a ‘Capacity system’ it implies that the potential full load requires ALL the UPS power
modules to be operational – i.e. if one module trips off line due to a fault, the remaining modules will transfer the load to
the bypass supply and the load will no longer be protected against supply aberrations.
‘Redundant’ system
If a system is designed with module redundancy it must contain at least one UPS power module over and above that
necessary to power the applied load.
Key Point: When planning a multi-cabinet system, it is not necessary to fully populate one cabinet with UPS
modules before installing the next cabinet. For example, if it is known at the outset that the eventual load is likely
to exceed 300 KW it makes sense to install and cable-up four ST-80 cabinets and distribute the initially required
number of modules between them.
STATIC
SWITCH
INVERTERRECTIFIER
Parallel Control Logic
UPS Module 06
CHARGER
STATIC
SWITCH
INVERTERRECTIFIER
Parallel Control Logic
UPS Module 07
CHARGER
Parallel Control Logic
UPS Module 08
Parallel Control Logic
UPS Module 09
Parallel Control Logic
UPS Module 10
UPS CABINET 2
STATIC
SWITCH
INVERTERRECTIFIER
Parallel Control Logic
UPS Module 01
CHARGER
STATIC
SWITCH
INVERTERRECTIFIER
Parallel Control Logic
UPS Module 02
CHARGER
Parallel Control Logic
UPS Module 03
Parallel Control Logic
UPS Module 04
Parallel Control Logic
UPS Module 05
UPS CABINET 1
Parallel Adapter Board
To JD5 in UPS CABINET 3
JD5 JD6Parallel Adapter Board JD5 JD6

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 9
2: General Description
Using the example given above, four fully populated ST-80 cabinets (16 modules = 320kW) would present one redundant
module for a 300kW load. Under normal circumstances with all 16 power modules on-inverter they would each provide
18.75kW when full load is applied, but if one module fails or is taken off-line, the remaining 15 modules can sustain the
load by each providing their rated 20kW output. The ability to lose one module yet still supply the rated load with
processed, backed-up power significantly increases the overall system reliability.
Note: A parallel system operating with a redundant module is known as an ‘N+1’ system.
2.3 Module component identification
Figure 2.8 ST-40 Cabinet front view
UPS Module 2
UPS Module 1
Batteries
Power Connections
(see page 37)
UPS Interface Connections
(see page 14)
Module Control Panel
(see page 16)
Maintenance Bypass Switch (IA1)
Module 2 Battery Isolator (F4-2)
Module 1 Battery Isolator (F4-1)

2: General Description
10 TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
Figure 2.9 ST-60 Cabinet front view
UPS Module 2
UPS Module 1
Batteries
Power Connections
(see page 37)
UPS Interface Connections
(see page 14)
Module Control Panel
(see page 16)
Maintenance Bypass Switch (IA1)
Module 2 Battery Isolator (F4-2)
Module 1 Battery Isolator (F4-1)
UPS Module 3
Module 3 Battery Isolator (F4-3)

TS_616_03 PW8000DPA ST S2 User Manual 4/4/18 11
2: General Description
Figure 2.10 ST-80 Cabinet front view
UPS Module 2
UPS Module 1
Power Connections
(see page 37)
UPS Interface Connections
(see page 14)
Module Control Panel
(see page 16)
Maintenance Bypass Switch (IA1)
Module 2 Battery Isolator (F4-2)
Module 1 Battery Isolator (F4-1)
Module 3 Battery Isolator (F4-3)
UPS Module 4
UPS Module 3
Module 4 Battery Isolator (F4-4)

2: General Description
12 TS_616_03 PW8000DPA ST S2 User Manual 4/4/18
Figure 2.11 ST-120 Cabinet front view
UPS Module 2
UPS Module 1
Power Connections
(see page 37)
UPS Interface Connections
(see page 14)
Module Control Panel
(see page 16)
Maintenance Bypass Switch (IA1)
Module 5 Battery Isolator (F4-5)
Module 4 Battery Isolator (F4-4)
Module 6 Battery Isolator (F4-6)
UPS Module 6
UPS Module 3
UPS Module 4
UPS Module 5
Module 2 Battery Isolator (F4-2)
Module 1 Battery Isolator (F4-1)
Module 3 Battery Isolator (F4-3)