ABB Power Distribution
15
Operating sequence
Result of operation
Posible subsequent
Breaker Position Charging Condition
switching operation
Switch on charging motor
-
Automatic charging
On-Off
Close breaker...
and
Off
automatically (re-)charge
Open breaker
On-Off
Close breaker...
and
Off
automatically (re-)charge
Autoreclosing
Off
sequence
(Activation via
On
(automatic charging
protection system
starts)
Off
Automatic charging completed
On-Off
Close breaker...
and
Off
automatically (re-)charge
Key to the charging condition indications:
Discharged
Charged
As a precondition for an autoreclosing sequence,
the operating mechanism is either (re-)charged
after a closing operation automatically by the
charging motor, or it requires (re-)charging by hand
if the operating mechanism is of the manual type.
6.3.2
Closing and opening
Closing:
• Press mechanical ON push-button 54.2, or
operate the electrical control unit.
Opening:
• Press mechanical OFF push-button 54.3, or
operate the electrical control unit.
See also note in section 3.2.1
The operating cycle counter 55.5 is automatically
incremented by one complete figure with each
switching cycle. On completion of a switching
operation the switch position indicator 55.4 in the
window of front plate 50.7. shows the appropriate
position of the circuit-breaker.
The anti-pumping relay K0 (wiring diagram in
firgure 7/3) prevents repeated ON-OFF switching
operations if, for example, the breaker is tripped by
a protection relay in response to a primary side fault
while a permanent electrical closing command is
simultaneously applied. The circuit-breaker can
then only be closed after the closing command has
been interrupted.
I
I
0
I
I
6.3.3
Operating sequence
Cicuit-breaker with motorized charging of the stored-energy spring mechanism
0
Off-On-Off or auto-
reclosing sequence
Off-On-Off or auto-
reclosing sequence
I
I
Off-On-Off or auto-
reclosing sequence
0
0
0
I
