Eaton 93E User manual

INSTALLATION AND
OPERATION MANUAL
Eaton 93E UPS
15-80 kVA (380/400/415 V)
614-01975-00

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 3 (133)
Copyright © 2015 Eaton Corporation. All rights reserved.
This manual contains important instructions that you should follow during
installation and maintenance of the UPS and batteries. Please read all instructions
before operating the equipment and save this manual for future reference.
The contents of this manual are the copyright of the publisher and may not be
reproduced (even extracts) without the written approval of Eaton Corporation.
Every care has been taken to ensure the accuracy of the information contained in
this manual, but no liability can be accepted for any errors or omission. The right
to make design modifications is reserved.
Unauthorized copying and lending are prohibited.
Eaton Power Quality Oy
Address:
Koskelontie 13
FI-02920 Espoo
Finland
Internet:
www.eaton.eu
Approvals and version history
REVISION
DATE
DESCRIPTION OF CHANGE
APPROVED BY
001
28.09.2015
First issue
Otto Asunmaa
Original instructions _X_ / Translation of the original instructions ___

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 4 (133)
Contents
Contents ..................................................................................................................4
1How to read this manual .............................................................................8
1.1 Safety-related signs.......................................................................8
1.2 Safety symbols..............................................................................8
1.2.1 Hazard symbols ................................................................ 8
1.2.3 Prohibited action symbols ................................................. 9
1.2.4 Mandatory action symbols ................................................ 9
1.3 Conventions used in this document .............................................. 9
2Safety instructions........................................................................................11
2.1 Audience.......................................................................................14
2.2 CE marking.................................................................................... 14
2.3 User precautions ...........................................................................14
2.4 Environment..................................................................................15
2.5 Using this manual.......................................................................... 16
2.6 Symbols on the UPS and accessories ........................................... 17
2.7 For more information..................................................................... 17
3Introduction to Eaton UPS ..........................................................................19
3.1 UPS standard features .................................................................. 20
3.1.1 Installation features........................................................... 20
3.1.2 Control panel .................................................................... 20
3.1.3 Communication interface.................................................. 21
3.1.4 High-efficiency mode ........................................................ 21
3.1.5 Advanced Battery Management........................................ 21
3.1.6 Maintenance bypass ......................................................... 21
3.2 Options and accessories ...............................................................21
3.2.1 External battery cabinet .................................................... 22
3.2.2 Parallel system.................................................................. 22
3.2.3 Monitoring and communication......................................... 22
3.2.4 Single feed........................................................................ 23
3.3 Battery system..............................................................................23
3.4 Basic system configurations..........................................................23
4UPS installation plan and unpacking .........................................................24
4.1 Creating an installation plan........................................................... 25
4.2 Installation checklist ......................................................................25
4.2.1 Parallel system installation checklist ................................. 26
4.3 Site preparations ...........................................................................27
4.3.1 Environmental and installation considerations ................... 27
4.3.2 UPS system power cabling preparation ............................ 38

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 5 (133)
4.3.3 UPS system interface wiring preparation .......................... 45
4.4 Inspecting and unpacking the UPS cabinets .................................. 46
5UPS system installation ...............................................................................49
5.1 Preliminary installation information................................................49
5.2 Unloading the UPS cabinet from the pallet .................................... 49
5.3 External power cabling installation.................................................52
5.4 Battery system installation ............................................................ 56
5.4.1 External battery cabinet installation................................... 57
5.4.2 1 + 1 common battery system.......................................... 59
5.5 Installing interface connections .....................................................60
5.5.1 Installing signal input connections..................................... 61
5.6 Installing parallel wiring and connections.......................................64
5.6.1 Installing MiniSlot interface connections........................... 68
5.7 Installing a remote EPO switch ..................................................... 68
5.8 Initial startup .................................................................................72
5.9 Completing the installation checklist ............................................. 72
6Understanding UPS operation ...................................................................73
6.1 UPS system overview ...................................................................73
6.2 Single UPS .................................................................................... 73
6.2.1 Modes .............................................................................. 74
6.2.2 Standard normal mode...................................................... 74
6.2.3 High-efficiency mode ........................................................ 76
6.2.4 Bypass mode.................................................................... 76
6.2.5 Battery mode.................................................................... 78
6.3 Single UPS unit system oneline configurations.............................. 80
7UPS operating instructions..........................................................................83
7.1 UPS controls and indicators........................................................... 83
7.1.1 Control panel .................................................................... 85
7.2 Using the control panel ................................................................. 85
7.2.1 Status indicators ............................................................... 86
7.2.2 System events.................................................................. 87
7.2.3 Using the LCD and push buttons ...................................... 88
7.2.4 Using the menu ................................................................ 90
7.2.5 Mimic screen.................................................................... 91
7.2.6 Display menu operation .................................................... 91
7.2.7 System controls................................................................ 97
7.3 Single UPS operation..................................................................... 99
7.3.1 Starting the UPS in the bypass mode................................ 99
7.3.2 Starting the UPS in the standard normal mode (default
mode) ............................................................................... 100
7.3.3 Transfer from the bypass mode to the normal mode ........ 101

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 6 (133)
7.3.4 Transfer from the normal mode to the bypass mode ........ 101
7.3.5 Transfer from the standard normal mode to the HE
mode ................................................................................ 102
7.3.6 Transfer from the HE mode to the standard normal
mode ................................................................................ 102
7.3.7 Transfer from the normal mode to internal
maintenance bypass ......................................................... 103
7.3.8 Transfer from internal maintenance bypass to the
normal mode .................................................................... 104
7.3.9 UPS and critical load shutdown......................................... 104
7.3.10 Charger control ................................................................. 105
7.3.11 Battery test....................................................................... 105
7.3.12 Using the UPS LOAD OFF command................................ 106
7.3.13 Using the remote emergency power-off switch................ 107
7.4 Multiple UPS parallel operation...................................................... 108
7.4.1 Starting the parallel UPS in the bypass mode.................... 108
7.4.2 Starting the parallel UPS in the standard normal mode
(default mode)................................................................... 109
7.4.3 Transfer from the normal mode to the bypass mode ........ 110
7.4.4 Transfer from the bypass mode to the normal mode ........ 110
7.4.5 Single UPS shutdown ....................................................... 111
7.4.6 Single UPS restart............................................................. 112
7.4.7 UPS and critical load shutdown......................................... 112
7.4.8 Charger control ................................................................. 113
7.4.9 Battery test....................................................................... 114
7.4.10 Using the UPS LOAD OFF command................................ 114
7.4.11 Using the remote emergency power-off switch................ 115
8Communication.............................................................................................117
8.1 MiniSlot cards ...............................................................................117
8.2 Signal input monitoring.................................................................. 118
9UPS maintenance .........................................................................................119
9.1 Important safety instructions......................................................... 119
9.2 Performing preventative maintenance........................................... 120
9.2.1 Daily maintenance ............................................................ 122
9.2.2 Monthly maintenance ....................................................... 122
9.2.3 Periodic maintenance........................................................ 123
9.2.4 Annual maintenance ......................................................... 123
9.2.5 Battery maintenance......................................................... 123
9.3 Installing batteries .........................................................................124
9.4 Recycling used battery or the UPS ................................................124
9.5 Maintenance training..................................................................... 125

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 7 (133)
10 Product specifications..................................................................................126
10.1 Model numbers.............................................................................126
10.2 Specifications................................................................................127
10.2.1 Directives and standards................................................... 127
10.2.2 UPS environmental ........................................................... 128
10.2.3 UPS input.......................................................................... 128
10.2.4 UPS output ....................................................................... 129
11 Warranty........................................................................................................131
11.1 General .........................................................................................131
11.2 Whom to contact in case of Warranty ...........................................132

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 8 (133)
1 How to read this manual
1.1 Safety-related signs
The following table explains the safety-related signs used in this
document.
DANGER
DANGER indicates a hazard with a high level of risk which,
if not avoided, will result in serious injury or death.
WARNING
WARNING indicates a hazard with a medium level of risk
which, if not avoided, could result in serious injury or
death, or damage to your machine.
CAUTION
CAUTION indicates a hazard with a low level of risk which,
if not avoided, could result in minor or moderate injury or
damage to your machine.
NOTE: Notes are used to indicate important information and useful tips.
1.2 Safety symbols
1.2.1 Hazard symbols
These symbols indicate a hazardous situation or action. Symbols are
used to warn of situations, which may cause environmental damage and
personal injury.
General warning symbol
Explosion and fire
hazard
Electrical hazard Corrosive hazard
Battery hazard

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 9 (133)
1.2.3 Prohibited action symbols
These symbols are used to indicate an action that should not be
taken.
General symbol for
prohibited action
No smoking
Limited or restricted
access
1.2.4 Mandatory action symbols
These symbols are used to indicate an action that must be taken.
General symbol for
mandatory action
Disconnect from
power source
Read the manual or
instructions
1.3 Conventions used in this document
This document uses the following type conventions:
•
Bold type
highlights important concepts in discussions, key terms in
procedures and menu options, or represents a command or option
that you type or enter at a prompt.
• Italic type highlights notes and new terms when they are defined.
•Screen type represents information that appears on the screen
or LCD.
In this manual, the term
UPS refers only to the UPS cabinet and its
internal elements. The term UPS system refers to the entire power
protection system - the UPS cabinet, the battery cabinet, and options or
accessories installed.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 10 (133)
The term line-up-and-match refers to cabinets that are physically
attached to the UPS, and the wiring between them is internal. The term
standalone refers to cabinets that are not physically attached to the UPS,
and are wired with external contractor-supplied wiring.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 11 (133)
2 Safety instructions
.
DANGER
Important safety instructions!
Save these instructions!
This document contains important instructions that must be followed
during the installation, operation and maintenance of the UPS and the
batteries. Read all of the instructions before operating the equipment.
Keep this manual for future reference.
The UPS operates with mains, battery or bypass power. It contains
components that carry high currents and voltage. A properly installed
enclosure is earthed and IP20 rated against electrical shock and foreign
objects. However, the UPS is a sophisticated power system and only
qualified personnel are allowed to install and service it.
.
DANGER
This UPS carries lethal voltages. All repairs and service must be
performed by authorized service personnel only. There are no user-
serviceable parts inside the UPS.
.
DANGER
Operations inside the UPS must be performed by a service engineer
from the manufacturer or from an agent authorized by the
manufacturer.
WARNING
The UPS is powered by its own energy source (batteries). The output
terminals may carry live voltage even when the UPS is disconnected
from an AC source.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 12 (133)
WARNING
To reduce the risk of fire or electric shock, install the UPS in a
temperature and humidity controlled, indoor environment that is free of
conductive contaminants. The ambient temperature must not exceed
40 °C (104 °F). Do not operate near water or excessive humidity (95%
maximum). The system is not intended for outdoor use.
As a result of the connected loads, high leakage current is possible.
Connection to earth ground is required for safety and proper product
operation. Do not check UPS operation by any action that includes
removal of the earth (ground) connection.
Before you start any installation or service work, make sure that all AC
and DC power sources are disconnected. Power may come from
multiple sources.
When undertaking installation or service work, ensure system
grounding continuity.
In a parallel system, the output terminals may be energized even when
the UPS is turned off.
Batteries can present a risk of electrical shock or burn from high short
circuit current. Always observe the following precautions when
working with batteries:
1) Remove watches, rings, or other metal objects.
2) Use tools with proper insulation.
3) Do not lay tools or metal parts on top of batteries.
4) Wear rubber gloves and boots.
Electric energy hazard. Do not attempt to alter any battery cabling or
connectors. Attempting to alter cabling can cause injury.
Do not open or mutilate batteries. Released electrolyte may be toxic
and is harmful to the skin and eyes.
The UPS may be connected to TN and TT power distribution systems.
The UPS unit is not suitable for IT (Isolated neutral or impedance-
earthed neutral) or corner-earthed power distribution systems.
IMPORTANT: The battery may consist of multiple parallel strings.
Make sure that you disconnect all strings before installation.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 13 (133)
CAUTION
Only qualified service personnel knowledgeable of the UPS and battery
systems and the required precautions are allowed to perform
installation or service work on batteries. Keep unauthorized personnel
away from the equipment. Before you install or replace equipment,
consider all the warnings, cautions, and notes concerning appropriate
handling. Before you connect or disconnect batteries, make sure
batteries are not being charged or discharged.
See the installation instructions before you connect the UPS to the
supply.
Make sure that your replacement batteries are of the same number
and type as the battery that was originally installed in the UPS.
Replacing the battery with an incorrect type causes a risk of explosion.
This UPS uses floating battery circuit which must not be grounded.
Dispose of batteries according to your local disposal requirements. Do
not dispose of batteries in a fire. When exposed to flame, batteries
may explode.
To ensure proper cooling airflow and to protect personnel from
dangerous voltages inside the unit, keep the UPS door closed and the
front panels installed.
Do not install or operate the UPS system close to gas or electric heat
sources.
Keep the operating environment within the parameters stated in this
document. Keep the surroundings of the UPS uncluttered, clean, and
free from excess moisture.
Observe all DANGER, CAUTION, and WARNING notices affixed to the
inside and outside of the equipment.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 14 (133)
2.1 Audience
The intended audience of this document is as follows:
•People who plan and perform the installation of the UPS
•People who use the UPS
This document provides guidelines for how to check the UPS delivery
and how to install and operate the UPS.
The reader is expected to know the fundamentals of electricity, cabling,
electrical components and electrical schematic symbols. This document
is written for a global reader.
CAUTION
Read this document before you start to operate or perform work on
the UPS.
2.2 CE marking
The product has a CE marking in compliance with the following
European directives:
•LVD Directive (Safety) 2006/95/EC
•RoHS Directive 2011/65/EU
•EMC Directive 2004/108/EC
CAUTION
This is a product for commercial and industrial application in the
second environment. Installation restrictions or additional measures
may be needed to prevent disturbances.
2.3 User precautions
The only permitted user operations are as follows:
•Startup and shutdown of the UPS, excluding the commissioning
startup.
•Use of the LCD control panel and the Maintenance Bypass Switch
(MBS).
•Use of optional connectivity modules and their software.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 15 (133)
Follow the precautions and only perform the described operations. Any
deviation from the instructions can be dangerous to the user or cause
accidental load loss.
. DANGER
Do not open any other screws in the unit than those holding the cover
plates of the MiniSlots and the MBS locking plate. Failure to recognize
the electrical hazards can prove fatal.
2.4 Environment
The UPS must be installed according to the recommendations in this
document. Never install the UPS in an airtight room, in the presence of
flammable gases, or in an environment exceeding the specifications.
Ensure sufficient amount of ventilation air flow preferably by natural
ventilation. Otherwise, forced (artificial) ventilation must be
implemented. Where forced ventilation is used, the air extracted from
the battery room must be exhausted to the atmosphere outside the
building.
The air inlet and outlet must be located at the best possible location to
create ideal conditions for the exchange of air, i.e. with:
•Openings on the opposite walls
•A minimum separation distance of 2 meters when openings on the
same wall
•It is recommended to locate the air inlet at the floor level and the air
outlet close to the ceiling level.
•It is recommended to create an airflow scheme for installation of
multiple UPSs.
•It is recommended to configure the installation layout with cold
aisles and hot aisles due to the UPS front-to-rear airflow protocol.
•For the free cooling applications, the cooling plan based on the
psychometric chart is highly recommended. The UPS specifications
must not be exceeded.
Excessive amount of dust in the operating environment of the UPS may
cause damage or lead to malfunction. Always protect the UPS from the
outside weather and sunshine. In order to maximize internal battery

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 16 (133)
service life time, the recommended operating temperature range is from
+20 ºC to +25 ºC. A temperature increase of 10 degrees reduces the life
approximately by 50%. Batteries need mandatory air change according
to the battery bank type, size and the charging current.
WARNING
During charge, float charge, heavy discharge, and overcharge,
hydrogen and oxygen gases are emitted from lead-acid and NiCd
batteries into the surrounding atmosphere. Explosive gas mixture may
be created if the hydrogen concentration exceeds 4% by volume in air.
Ensure the necessary air flow rate for the ventilation of the UPS
location.
NOTE: For more information about the battery room ventilation
requirements, including the calculation of the necessary air flow, see:
IEC 62485-2: Safety requirements for secondary batteries and battery
installations.
2.5 Using this manual
This manual describes how to install and operate the Eaton 93E 15-80
kVA. Read and understand the procedures described in this manual to
ensure trouble-free installation and operation. In particular, be thoroughly
familiar with the remote EPO procedure (see Section 7.3.13).
The information in this manual is divided into sections and chapters. The
system, options, and accessories being installed dictate which parts of
this manual should be read. At a minimum, Chapters 2 through 5 and
Chapter 7 should be examined.
Read through each procedure before beginning the procedure. Perform
only those procedures that apply to the UPS system being installed or
operated.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 17 (133)
2.6 Symbols on the UPS and accessories
The following are examples of symbols used on the UPS or its
accessories. The symbols are used to alert you of important information.
RISK OF ELECTRIC SHOCK
Indicates that a risk of electric shock is present and the
associated warning should be observed.
CAUTION: REFER TO OPERATOR'S
MANUAL
Refer to your operator's manual for additional
information, such as important operating and
maintenance instructions.
This symbol indicates that you may not discard the UPS
or the UPS batteries in the trash. This product involves
sealed, lead-acid batteries and they must be disposed of
properly. For more information, contact your local
recycling / reuse or hazardous waste center.
This symbol indicates that you must not discard waste
electrical or electronic equipment (WEEE) in the trash.
For proper disposal, contact your local recycling / reuse
or hazardous waste center.
2.7 For more information
Address any inquiries about the UPS and the battery cabinet to the local
office or an agent authorized by the manufacturer. Quote the type code
and the serial number of the equipment.
Call your local service representative if you need assistance with any of
the following:
•Scheduling initial startup
•Regional locations and telephone numbers
•A question about any of the information in this manual
•A question that this manual does not answer

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 18 (133)
Refer to the External Battery Cabinet Installation Manual for the
following additional information:
•Installation instructions, including site preparation, planning for
installation, cabling and safety information, and detailed illustrations
of cabinets with dimensional and connection point drawings
Visit www.eaton.eu or contact an Eaton service representative for
information on how to obtain copies of these manuals.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 19 (133)
3 Introduction to Eaton UPS
The Eaton 93E 15-80 kVA uninterruptible power supply (UPS) is a true
online, continuous-duty, transformer-free, double-conversion, solid-state,
3-phase system that provides conditioned and uninterruptible AC power
to protect the loads connected to it from power failures.
The Eaton 93E 15-80 kVA online power protection system is used to
prevent loss of valuable electronic information, minimise equipment
downtime, and minimise the adverse effect on production equipment
due to unexpected power problems.
The Eaton 93E 15-80 kVA UPS continually monitors incoming electrical
power and removes the surges, spikes, sags, and other irregularities that
are inherent in commercial utility power. Working with a building's
electrical system, the UPS system supplies clean, consistent power that
sensitive electronic equipment requires for reliable operation. During
brownouts, blackouts, and other power anomalies, batteries provide
emergency power to safeguard operation of the load equipment.
The UPS is housed in a single free-standing cabinet, with safety shields
behind the door for hazardous voltage protection.
This manual is for Eaton 93E series UPS, refer Section 10.1 for product
models.
Figure 1 shows the Eaton 93E 15-80 kVA UPS.
NOTE: Start-up and operational checks must be performed by a qualified
service personnel authorized by Eaton. If these instructions are not
followed, the warranty terms specified in Chapter 11 become void. This
service is offered as a part of the sales contract for the UPS. Contact
your
Eaton service representative in advance to reserve a preferred startup
date.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 20 (133)
Figure 1. Eaton 93E UPS (15-80 kVA)
3.1 UPS standard features
The UPS has many standard features that provide cost-effective and
consistently reliable power protection. The descriptions in this section
provide a brief overview of the UPS standard features.
3.1.1 Installation features
Power cabling can be routed to the bottom or rear of the cabinet with
connections made to easily accessible terminals. Some models (Eaton
93E-15I / 93E-20I / 93E-30I / 93E-40I) provide rear-only cable access. For
more details, see Section 5.3.
3.1.2 Control panel
The control panel is located on the front of the UPS. It contains a liquid
crystal display (LCD) and push button switches to control the operation
of the UPS and to display the status of the UPS system. For more
information, see Chapter 7.

Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001 Document ID: 614-01975-00 21 (133)
3.1.3 Communication interface
•Signal input monitoring
Up to 3 inputs in the UPS are available to connect the facility's
alarm system contacts. Some system configurations may limit the
number of inputs available. The UPS uses these inputs to monitor
the signal inputs in addition to the UPS status. For more
information, see Chapter 8.
•MiniSlot communication bays
2 communication bays are standard equipment. One to 2 optional
MiniSlot connectivity cards can be installed in the UPS module at
any time. MiniSlot cards are quickly installed at the front of the UPS
(behind the door) and are hot-pluggable. For more information, see
Chapter 8.
3.1.4 High-efficiency mode
The Eaton 93E Series UPS offers a high-efficiency (HE) normal mode
with double-conversion on demand. This mode allows the Eaton 93E
UPS to achieve 98% efficiency while still protecting the load. For
information on how to set the UPS to work in the high efficiency mode,
see Chapter 7.
3.1.5 Advanced Battery Management
A 3-stage charging system increases the battery service life by
optimizing the recharge time. It also protects the batteries from damage
due to high current charging and inverter ripple currents.
3.1.6 Maintenance bypass
The internal maintenance bypass for the 15-80 kVA models consists of
input, output, neutral and bypass input (dual feeds) switches used to
control the AC input to the UPS. The inverter output and the
maintenance bypass switch are used to partially isolate the UPS so that
a limited number of components can be serviced without interrupting
power to the critical systems.
3.2 Options and accessories
Contact your Eaton sales representative for more information about the
available options and accessories.