P-164000249
30-200 kW
69
Revision 2
User's and Installation Guide
4.
On the UPM control screen, select
Shut down module
.
6.7 Using the Remote Emergency Power-off switch
A UPS emergency power-off 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 verification. The UPS, including Bypass, remains off
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 customer-
supplied EPO 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 off immediately, without asking for verification.
DANGER
Do not attempt to restart the system after Load Off until the cause of the shutdown has
been identified and cleared.
2.
To restart the UPS after using the EPO pushbutton, reset the EPO switch and then follow the
procedure in
Chapter 6.4.1 Starting the UPS system in Double conversion mode
on page 63
or
Chapter 6.4.2 Starting the UPS system in Bypass mode
on page 64.
6.8 Turning UPS from double conversion mode to
mechanical bypass
The operation of the internal MBS is allowed for a trained person only who is familiar with the UPS
behavior and functions. The full UPS wiring diagram with a MBS switch is presented in the installation
instructions.
