Emergency Power Off (Epo); Installation Checklist - ABB PowerValue 11/31 T Operating Manual

4.5 Emergency Power Off (EPO)

The EPO connector gives the user the possibility to block the output of the UPS in case of an
emergency. As a default, the EPO is Normally Closed (NC) by a jumper in the rear panel. If the jumper
is removed, the UPS output will not supply energy to the load until the EPO status is again modified.
Enable the EPO status
To recover to normal status, close the EPO connector. Then, enter the LCD menu (refer to Section
5.4.2.3) to clear the EPO status. The UPS alarm will stop and will transfer to bypass mode. To transfer
to online-mode, press and hold the power-on button for a few seconds.
Note: EPO connector can be configured as Normally Closed (NC) o Normally Opened (NO) through the
USB or RS232 port. Contact your local supplier for further information before modifying the settings.

4.6 Installation Checklist

 All packing materials and restraints have been removed from each module.
 Each module in the UPS system is placed in the installed location.
 All conduits and cables are properly routed to the UPS and auxiliary enclosures.

All power cables are properly sized and terminated.
 A ground conductor is properly installed.
 Battery enclosure installation instructions have been completed.

Air conditioning equipment is installed and operating properly.
 The area around the installed UPS system is clean and dust-free.
 Adequate workspace exists around the UPS and other cabinets.
 Adequate lighting is provided around all UPS equipment.

Any optional accessories are mounted in their installed location and properly wired.
 Summary alarms and/or building alarms are wired appropriately. (Optional)
 Start-up and operational checks performed by authorized service personnel.
 All network connections are completed.
Modifications reserved
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Disable the EPO status