Eaton 93PM G2 User Manual

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The neutrals of all the UPSs must be connected. The shortest length of wire from the source to the UPS
must be a minimum of 95% of the length of the longest wire. The measurement is with respect to where
the UPS’s outputs are tied.
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The input feed and bypass feed may be separate sources. The sources must share a common neutral.
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A separate battery shall be connected to each UPS, and the battery capacity for each UPS must be
identical.
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Module Output Breakers (MOBs) allow the output of a UPS to be disconnected from other UPSs and the
system load for maintenance and service. Design considerations assume that each UPS has a Module
Output Breaker (MOB). The breaker should also disconnect the neutral for improved safety during
maintenance.
The MOB must have a Form “C” auxiliary contact. The NO contact is connected to the corresponding
UPS’s input used for signal input. The NC contact is used to disconnect the bypass pull-chain when the
MOB is open. Figure
22: Principle of paralleled UPS systems shows the principles of paralleled UPS
systems including MOBs and outputs from UPSs.
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Users without MOBs installed can simply leave the MOB signal input disabled. The user should be aware
that systems without MOB have limited maintenance capability.
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Figure 22. Principle of paralleled UPS systems
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956
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February 2021 www.eaton.eu 5566

Eaton 93PM G2 Specifications

General

Brand	Eaton
Model	93PM G2
Category	UPS
Language	English