Transferring The Ups From Maintenance Bypass; Using The Remote Emergency Power-Off (Repo) Switch - Eaton 9390 Installation And Operation Manual

9. Tighten the interlock knob by hand.
10. Open the MIS breaker.
11. Open the BIB and RIB (if installed).
5.2.3

Transferring the UPS from Maintenance Bypass

Only trained personnel familiar with the operation of this equipment should transfer loads. Failure to
follow this transfer sequence may cause loss of power to loads or overload protection devices to
activate.
1. Close the BIB and RIB (if installed).
2. Verify that the UPS is operating and is in Bypass mode. Refer to the Eaton 9390 UPS (40–80 kVA)
Installation and Operation Manual.
3. Close the MIS breaker.
4. Completely loosen the interlock knob by hand (see Figure 5-7 on page 5-10).
5. Slide the interlock plate until the standoff aligns with the NORMAL arrow.
6. Retighten the interlock knob by hand.
7 . Open the MBP breaker.
8. Transfer the UPS to Normal mode.
5.2.4

Using the Remote Emergency Power-off (REPO) Switch

An emergency power-off is initiated by the REPO pushbutton. In an emergency, you can use this switch to
control the IDC and UPS output. The REPO switch opens the IDC MBP breaker, de-energizes the critical load,
and powers down the UPS immediately, without asking for verification.
The UPS, including bypass, remains off until restarted.
To use the REPO switch:
All power to the critical load is lost when the REPO 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 general instructions for activating a REPO switch. Refer to the
operating instructions provided with the switch for specific instructions.
1. Press the REPO pushbutton.
The IDC MBP breaker is tripped, the UPS input, output, and bypass backfeed contactors open, the battery
breaker or disconnect is tripped, and the PM is turned off immediately, without asking for verification.
Do not attempt to restart the system after REPO until the cause of the shutdown has been identified and
cleared.
2. To restart the UPS after using the REPO pushbutton, reset the REPO switch and then follow the
procedures in the Eaton 9390 UPS (40–80 kVA) Installation and Operation Manual.
Eaton 9390 IDC (40–80 kVA) Installation and Operation Manual 164201690 Rev 3 www.eaton.com/powerquality
CAUTION
CAUTION
CAUTION
IDC Controls and Operation
5-9