Controls and Operation
Eaton BladeUPS 12 kVA Maintenance Bypass Cabinet Installation and Operation Manual P-164000130—Rev 1 www.eaton.com/powerquality 6-5
1. Close the RIB on the MBC to supply power to the BladeUPS. Verify that the UPS is operating and is in
Bypass mode. For additional information, refer to the Operation chapter in the Eaton
®
BladeUPS
®
User’s
Guide (Preassembled and Standard Systems) For use with Eaton BladeUPS 5.1 kVA to 60 kVA (N+1)
systems.
NOTE When the UPS is in Bypass mode, the UPS IN BYPASS indicator light on the MBC
is lit.
The BladeUPS must be in Bypass mode because, if it is in Standby mode, it will not have any
output voltage. In this case, closing the UOB and opening the MBB will cause the critical loads to
lose power.
2. Close the UOB on the MBC.
Failure to close the UOB prior to opening the MBB will interrupt power to the load.
3. Completely loosen the MBC maintenance interlock bar knobs by hand.
4. Slide the interlock bar until the standoff aligns with the NORMAL arrow.
5. Retighten the interlock bar knobs by hand.
6. Open the MBB on the MBC.
NOTE Observe that the indicator light may illuminate during the transition from bypass
(MBB closed) to online (MBB opened). When the UPS first comes online (Normal
mode), the UPS IN BYPASS indicator light on the Maintenance Bypass Cabinet
cabi
net is extinguished and does not illuminate.
7. Ensure that the MBC circuit breakers are set as shown in Table 6-3 and Figure 6-3.
Table 6-3. UPS in Maintenance Bypass Settings for Circuit Breakers
SIB CLOSED
MBB CLOSED
RIB OPEN
UOB OPEN
MBC Distribution Panel Main Breakers CLOSED
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