ABB OHB Installation, Service And Maintenance page 32

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Outdoor SF6 Circuit Breaker - Type
OHB: Instruction for Storage,
Installation, Service and
Maintenance
Original Title: ABB Breaker
Uploaded by Sampath Kumar
Full description
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Subject
of inspection
Under-
Voltage
release
Shunt
opening
release
Local-
remote
selector SW
Key lock
Changeover
switch for
Local/Remote
electrical
control
Auxiliary
RELATED TITLES
Power
Transformers
Procedure
Give the rated auxiliary supply to the
under-voltage release and carry out
the circuit-breaker closing operation
Disconnect the power supply to the
release
Close the circuit breaker manually
Put the changeover switch on LOCAL
(17 - fig.4)
Locally control the electric opening
of the circuit-breaker using the
special pushbutton (alternatively
opening can be set and controlled
remotely).
Open the circuit breaker manually
Put the changeover switch on LOCAL
(17 - fig.4)
Locally control the electric closing
of the circuit-breaker using the
special pushbutton (alternatively
closing can be set and controlled
remotely).
Open the circuit breaker
Turn the key and remove it. Attempt
the circuit breaker closing operation
Insert the key again and turn it 90 deg.
Carry out the closing operation
Put the changeover switch on REMOTE
Close the operating mechanism
enclosure door. Carry out a few
opening and closing operations using
the special remote controls.
Open the operating mechanism
enclosure door. Try to carry out the
remote closing operation.
Insert the auxiliary contacts into
ABB Motor ABB Protection
Starting Br
Positive check
The circuit-breaker closes
correctly
The signals are correct
The circuit-breaker opens
The signal changes over
The circuit breaker opens
normally
The circuit breaker close
normally
Neither manual nor elec
closing takes place
Both electric and manu
closing take place corre
in this position the key
cannot be removed
The operations and sig
are normal
Remote closing is not
possible
Signals occur correctly
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Transform
ABB