UNDERSTANDING UPS OPERATION
Eaton 9395 Plus 1 UPS (225–275 kVA) Installation and Operation Manual
S
164201710 Rev 2
www.eaton.com\powerquality
6-8
NOTE
Callout letters
A
,
B
,
C
, and
D
map to Table 3‐4 on page 3-8.
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.
Service Connector
Input Breaker
(CB1)
(optional)
X-Slot
Interface
E1, E2, E3
E6, E7,
E8, E12
48V Battery
Shunt Trip
UPS
CABINET
Backfeed
Contactor (K5)
AC Output to
Critical Load
E9, E10,
E11, E12
Static
Switch
AC Input to
UPS Rectifier
3 Wire A-B-C
Rotation
AC Input to
Bypass
3 or 4 Wire A-B-C
Rotation
Interface Board
Battery Aux
Remote EPO
Building Alarms
Alarm Relays
Fuse
Battery
Converter
Inverter
Output
Contactor
(K3)
Fuse
Rectifier
Input
Contactor
(K1)
Battery Contactor (K2)
Fuse
Fuse
Fuse
UPM 1
Battery
Breaker
BATTERY SYSTEM
E4, E5
Battery
Converter
Inverter
Output
Contactor
(K3)
Fuse
Rectifier
Input
Contactor
(K1)
Battery Contactor (K2)
Fuse
Fuse
Fuse
UPM 2
(Not supplied with the UPS)
A
B
C
D
Single-feed Kit
(Not supplied
with the UPS)
Figure 6‐5. UPS System – Common Rectifier Feed, Common Battery, Dual‐Feed Configuration
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