CAUTION
The UPM must be in the shutdown state before it can be removed from the
UPS. The UPM will suffer serious damage if it is removed from the UPS under
loading.
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A UPS emergency power-off is initiated by the EPO push button switch. In case of an emergency, you can
use this switch to control the UPS output. The EPO switch de-energizes the critical load and powers down
the UPS immediately without asking for verification. The UPS, including the static bypass switch, remains
off until it is restarted.
CAUTION
When the EPO switch is activated, all power to the critical load is lost. Use this
feature only in case of emergency.
NOTE: The following instructions are for the EPO switch supplied by Eaton Corporation. If you are using a
customer-supplied EPO switch, it may not activate in the same way. For operating instructions, see the
documentation provided with the switch.
To use the EPO switch.
1. Press the EPO push button switch.
The input, output, and bypass backfeed contactors open, the battery breaker or disconnect is tripped,
and the power module is turned off immediately, without asking for verification.
To restart the UPS after using the EPO pushbutton, reset the EPO switch and then follow the procedure in
Section
7.4.1 Start the UPS system in the double conversion mode or Section 7.4.2 Start the UPS system
in the bypass mode.
WARNING
Do not attempt to restart the system after using the EPO switch until the
conditions for safe start-up have been confirmed.
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Only trained personnel who are familiar with the behavior and functions of the UPS are allowed to operate
the internal MBS.
To turn the UPS to maintenance bypass:
EATON 93PM G2 UPS USER’S AND INSTALLATION GUIDE P-164000956
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February 2021 www.eaton.eu 8811
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