Eaton 93PR - 6.6. Using the Remote Emergency Power-off switch

Eaton 93PR 60-1200 kW UPS
Installation and Operation Manual
115
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6.6. Using the Remote Emergency Power-o󰀨 switch
A UPS emergency power-o󰀨 is initiated by the EPO pushbutton switch. In 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 verication. The UPS, including Bypass, remains o󰀨 until restarted.
CAUTION
All power to the critical load is lost when the EPO switch is activated in the following step. You
should use this feature only when you want to de-energize the critical load.
NOTE
The following instructions are for the Eaton Corporation-supplied EPO switch. If a
customersuppliedEPO switch is used, it may not activate in the same manner; refer to the
operating instructions provided with the switch.
To use the EPO switch:
1. Press the EPO pushbutton switch.
The input, output, and bypass backfeed relays open, the battery breaker or disconnect is tripped, and the
power module is turned o󰀨 immediately, without asking for verication.
2. To restart the UPS after using the EPO pushbutton, reset the EPO switch and then follow the
procedure in Section
6.3.1 Starting the UPS System in Double Conversion Mode or Section 6.3.2
Starting the UPS System in Bypass Mode .
DANGER
Do not attempt to restart the system after Load O󰀨 until the cause of the shutdown has been iden-
tied and cleared.