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Eaton 93PM G2 Series Manual

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Eaton 93PM G2 UPS
50 – 360 kVA
User’s and Installation
Guide
EEaattoonn 9933PPMM GG22 UUPPSS
Copyright © 2021 Eaton Corporation plc. 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.
This is a product for commercial and industrial application in the second environment. Installation
restrictions may apply or additional measures may be needed to prevent disturbances.
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
RREEVVIISSIIOO DDAATTEE DDEESSCCRRIIPPTTIIOO OOFF CCHHAA GGEE AAPPPPRROOVVEEDD BBYY
1 09-11-2020 First issue Jari Eloranta
2 23-02-2021 Second issue Jari Eloranta
These are the original instructions.
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956 -February 2021 www.eaton.eu 22
Contents
1 How to read this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.1 Safety-related signs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.2 Symbols and abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.3 Conventions used in this document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
1.4 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.3 CE marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.4 User precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
2.5 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.6 Symbols on the UPS and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2.7 For more information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3 Introduction to Eaton UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.1 About the Eaton UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.2 Looking inside the UPS system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.3 UPS operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.3.1 Normal operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.3.1.1 Double conversion mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
3.3.1.2 Variable Module Management System mode . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.3.1.3 Energy Saver System mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
3.3.2 Stored energy and battery mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
3.3.3 Bypass mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
3.4 UPS features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.4.1 Advanced Battery Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.4.2 Powerware Hot Sync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
3.4.3 Power Conditioner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.4.4 Frequency Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.4.5 Sync Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.5 Software and connectivity features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.5.1 User interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.5.2 Power Management Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.5.3 Automatic UPM FW update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.5.4 Automatic UPS output power configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.6 Options and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.6.1 Maintenance Bypass Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.6.2 Top air exhaust kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.6.3 Single feed kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.6.4 Internal battery breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.7 UPM installation and replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
3.8 Battery system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.8.1 UPS Battery Switchgear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
3.9 Basic system configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956 -February 2021 www.eaton.eu 33
4 UPS installation plan and unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.1 About UPS installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.2 Create an installation plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.3 Installation checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
4.4 Site preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.4.1 Environmental considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
4.4.2 Installation considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
4.4.3 UPS system power wiring preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
4.5 Unpack and unload the UPS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5 UPS system installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.1 About UPS system installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.2 Steps to install the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
5.3 Installing the battery system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
5.3.1 Battery trip wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
5.4 Installing UPS external battery cabinet and battery power cabling . . . . . . . . . . . . . . . . . . . . . . . .51
5.5 Install a remote EPO switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
5.6 Install interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
5.6.1 Install customer input signals interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
5.6.2 Battery breaker wiring interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
5.6.3 Relay output interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
5.6.4 Industrial Relay Card interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
5.6.5 MiniSlot interface connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
5.6.6 Install signal interface connections in a parallel system . . . . . . . . . . . . . . . . . . . . . . . . . .55
5.7 Wiring parallel 93PM G2 UPS systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
5.7.1 Power wiring overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
5.7.2 Control signals overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5.7.3 External parallel system control wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
5.8 UPS system interface wiring preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
6 Communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.1 About communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.1.1 MiniSlot cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.1.2 Intelligent Power Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
6.1.3 Signal input monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
6.1.4 General purpose relay contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
6.1.5 Configuring relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
7 UPS operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
7.1 About UPS operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
7.2 UPS controls and indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
7.2.1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
7.2.2 Status indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
7.2.2.1 UPS door color LED indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
7.2.2.2 UPM status color LED indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
7.2.3 System events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
7.2.4 Menu structure of the 93PM G2 UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
7.2.4.1 User settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956 -February 2021 www.eaton.eu 44
7.3 Signing in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
7.4 System control instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
7.4.1 Start the UPS system in the double conversion mode . . . . . . . . . . . . . . . . . . . . . . . . . . .75
7.4.2 Start the UPS system in the bypass mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
7.4.3 Transfer from the bypass mode to the double conversion mode . . . . . . . . . . . . . . . . . . . .76
7.4.4 Transfer from the double conversion mode to the bypass mode . . . . . . . . . . . . . . . . . . . .76
7.4.5 Transfer from the double conversion mode to the Energy Saver System mode . . . . . . . . .77
7.4.6 Transfer from the Energy Saver System mode to the double conversion mode . . . . . . . . .77
7.4.7 Transfer from the double conversion mode to the Variable Module Management System
mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
7.4.8 Transfer from the Variable Module Management System mode to the double conversion
mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
7.4.9 Shut down the UPS system and critical load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
7.4.10 De-energize the critical load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
7.5 Control a single UPS in a parallel system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
7.5.1 Start a single UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
7.5.2 Shut down a single UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
7.5.3 Enable and disable the battery charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
7.6 UPM control instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
7.6.1 Start the UPMs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
7.6.2 Shut down the UPMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
7.7 Use the Remote Emergency Power-off switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
7.8 Turn the UPS from the double conversion mode to the maintenance bypass mode . . . . . . . . . . . .81
7.9 Turn the UPS from the maintenance bypass mode to the double conversion mode . . . . . . . . . . . .83
8 UPS maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
8.1 Introduction to UPS maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
8.2 Important safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
8.3 Preventive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
8.3.1 Daily maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
8.3.2 Monthly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
8.3.3 Periodic maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
8.3.4 Annual maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
8.3.5 Battery maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
8.4 Recycling the used UPS or batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
8.5 Maintenance training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
9 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
9.1 About technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
9.2 Directives and standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90
9.3 UPS environmental specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91
10 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
10.1 General information about warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
10.2 Whom to contact in case of Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
APPENDIX A: Relay alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93
APPENDIX B: Recommended security hardening guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
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Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
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1 How to read this manual
11..11 SSaaffeettyy--rreellaatteedd ssiiggnnss
These are the safety-related signs used in this document.
DANGER
DANGER indicates a hazard with a high level of risk which, if not avoided, may
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 the equipment.
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 the equipment.
NOTE: Notes are used to indicate important information and useful tips.
11..22 SSyymmbboollss aanndd aabbbbrreevviiaattiioonnss
HHaazzaarrdd ssyymmbboollss
These symbols indicate a hazardous situation or action. Symbols are used to warn of situations, which
can cause environmental damage and personal injury.
General warning sign
Explosion and fire hazard
Battery hazard
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956 -February 2021 www.eaton.eu 77
Corrosive hazard
Electrical hazard
PPrroohhiibbiitteedd aaccttiioonn ssyymmbboollss
These symbols are used in warnings and notifications to indicate an action that should not be taken. The
prohibited action symbols are shown below.
No smoking
Limited or restricted access
General symbol for prohibited action
Do not touch
MMaannddaattoorryy aaccttiioonn ssyymmbboollss
These symbols are used in warnings and notifications to indicate an action that must be taken. The
mandatory action symbols are shown below.
Wear eye protection
General symbol for mandatory action
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956 -February 2021 www.eaton.eu 88
Read the manual or instructions
Disconnect from power source
First aid
Pb
Batteries marked with this sign must be recycled
11..33 CCoonnvveennttiioonnss uusseedd iinn tthhiiss ddooccuummeenntt
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.
11..44 GGlloossssaarryy
The following acronyms are used in Eaton documentation to refer to Eaton UPS products or their parts.
Table 1. Glossary of acronyms
ABM Advanced Battery Management
EPO Emergency Power-Off
ESS Energy Saver System
IPM Intelligent Power Manager
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956 -February 2021 www.eaton.eu 99
IPP Intelligent Power Protector
MBS Maintenance Bypass Switch
MIS Maintenance Isolation Switch
MOB Module Output Breaker
SCR Silicon-Controlled Rectifier
UPM Uninterruptible Power Module
UPS Uninterruptible Power Supply
VRLA Valve Regulated Lead Acid (battery)
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