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To UPS
To UPS
Rectifier
Bypass
Input
Input
RIB:
Rectifier Input Breaker
BIB:
Bypass Input Breaker
MIS:
Maintenance Isolation Breaker
MBP:
Maintenance Bypass Breaker
NOTE If installing a maintenance bypass, a minimum of two separate feeds with upstream feeder breakers, or a single feed with two
upstream feeder breakers, must be provided: one for the UPS or rectifier input breaker (RIB) (if installed) and one for the maintenance bypass
input. DO NOT use a single feed or a single feeder breaker to supply both the UPS or RIB and the maintenance bypass. If a bypass input
breaker (BIB) is installed in the maintenance bypass and a single−feed UPS is being installed, a single feed to the maintenance bypass is
acceptable for supplying both the UPS and the bypass.
Figure 6-9. Simplified Dual−Feed UPS with Maintenance Bypass Panel
EATON Powerware
®
9395 UPS (1000–1100 kVA) Installation and Operation Manual
AC Input
AC Input
RIB
MBP
BIB
MIS
Output
from
UPS
MAINTENANCE
BYPASS PANEL
(Provided by Others)
Backfeed
Contactor
Static
Switch
K5
Output
Contactor
Battery
Breaker
BATTERY SYSTEM
UNDERSTANDING UPS OPERATION
CRITICAL LOAD
DISTRIBUTION UNIT
K3
UPS
S
164201764 Rev 1 www.powerware.com
6−11
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