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Pull Chain
Parallel CAN
Mini-Slot
Remote EPO
Interface
Interface
Board
NOTE Callout letters A, B, and D map to Table 3-4.
Figure 5-8. Eaton 93PM-50-1 UPS System Oneline with External Battery
Eaton 93PM UPS (20–50 kW, 480V Four Wire – 50 kW Frame) Installation and Operation Manual P-164000540—Rev 4
AC Input to UPS
Rectifier 3 Wire
A-B-C Rotation
A
E1, E2, E3
E6, E7, E8, E12
Optional Single-Feed
CB1 Input
Jumper
Breaker
Fuse
Rectifier
Switchgear
Rectifier
Inverter
Inverter
Switchgear
Fuse
Battery
Converter
Battery
Switchgear
Fuse
UPM 1
E4, E5
C
Battery
Breaker
EXTERNAL BATTERY
CABINET
(Not supplied with the UPS)
Understanding UPS Operation
AC Input to
Bypass 4 Wire
A-B-C Rotation
B
Fuse
Bypass
Switchgear
Static
Switch
UPS CABINET
www.eaton.com/powerquality
AC Output to
Critical Load
E9,
D
E10,
E11,
E12
5-9
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