
ABB Power Distribution
47
Example 2: Circuit-breaker with motor-operated charging mechanism, withdrawable part in service position
Operating sequence
Result of operation
Possible subsequent
(with panel door closed)
Switch
Charging
switching operation
position
condition
Switch on charging motor
-
Automatic charging
0
On-Off
Close breaker...
and
I
Off
automatically (re)charge
I
Open breaker
0
On-Off
Close breaker...
and
I
Off
automatically (re)charge
I
Autoreclosing
Off
0
sequence
(Activation via
protection system)
On
I
(automatic
charging starts)
Off
0
Automatic charging
0
On-Off
Close breaker...
and
I
Off
automatically (re)charge
I
Test switching of the circuit-breaker without primary voltage can be carried out with the withdrawable part in the
test position (with the control wiring plug fitted).
Off-On-Off or auto-
reclosing sequence
Off-On-Off or auto-
reclosing sequence
Off-On-Off or auto-
reclosing sequence
Summary of Contents for UniGear ZS1
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