7400 Series UPS User Manual Chapter 1 - General Description
Single Module and One plus One Systems One Plus One System
6310018a.02.doc
1-11
Issue 2
(02/98)
The "Common Battery" option kit contains a DCCT (d.c. Current
Transformer) in series with the battery, which replaces the equivalent
DCCT’s inside the UPS’s (these are inhibited).
To ensure balance of the rectifiers output currents a link on the Parallel
control p.c.b. interconnects the control circuits of the two rectifiers.
The components used by the "Common Battery Option" are contained in
a separate cabinet known as the Common Battery Panel.
BATTERY
1+1 Parallel Control
RECTIFIER
INVERTER
STATIC
SWITCH
Control
Logic
Main
Supply
Main
Supply
UPS
Output
Supply
RECTIFIER INVERTER
STATIC
SWITCH
1+1 Parallel Control
Figure 1-1 . “Common battery” configuration
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