UNDERSTANDING UPS OPERATION
Eaton 9395 550/275 UPS (225–550 kVA) Installation and Operation Manual
S
164201716 Rev 2
www.eaton.com/powerquality
6-11
NOTE
Callout letter
A
maps to Table 3‐8 on page 3-13. Callout letters
B
,
C
, and
D
map to Table 3‐6 on page 3-11 or Table 3‐7 on page 3-12.
NOTE
If the load requires a neutral, a bypass source neutral must be provided. If the load does not require a neutral and there is no neutral conductor
connected at the bypass input, a neutral to ground bonding jumper must be installed. DO NOT install both a source neutral and a bonding jumper.
UPS CABINET
E9,
E10,
E11,
E12
Service Connector
Battery
Converter
Inverter
Output
Contactor
(K3)
Fuse
Rectifier
Input
Contactor
(K1)
Battery Contactor (K2)
Fuse
Fuse
Fuse
UPM 1
Battery
Breaker
E4, E5
E4, E5
Battery
Converter
Inverter
Output
Contactor
(K3)
Fuse
Rectifier
Input
Contactor
(K1)
Battery Contactor (K2)
Fuse
Fuse
Fuse
UPM 4
X-Slot
Interface
48V Battery
Shunt Trip
Interface Board
Battery Aux
Remote EPO
Building Alarms
Alarm Relays
FI-UPM CABINET
Battery
Breaker
C
D
AC Output
to Critical
Load
C
BATTERY SYSTEM
(Not supplied with the UPS)
BATTERY SYSTEM
(Not supplied with the UPS)
E6, E7,
E8, E12
Backfeed
Contactor (K5)
Static
Switch
AC Input to Bypass
3 or 4 Wire A-B-C
Rotation
Fuse
B
E1,
E2,
E3
AC Input to UPS
Rectifiers 3 Wire
A-B-C Rotation
UPM 1
A
UPM 4
A
E1,
E2,
E3
Figure 6‐8. UPS System with Field Installed UPM – Separate Rectifier Feed, Separate Battery, Dual‐Feed Configuration