ABB VM1 Installation And Service Instructions Manual page 52

VM1 - USER MANUAL
52
—
10. Putting into service
10.1. General procedures
Closing in case of a power failure
Closing is not advisable and is not possible.
Manual emergency opening
Use the crank handle 1 (fig. 16) for manual
emergency operation.
Proceed as follows:
• couple the crank handle (1) in the seat (2)
• turn the crank handle (1) counterclockwise as far
as the end-of-run positionif the circuit breaker is
in the racked-in position in the switchgear/
enclosure, it is now possible to take it to the
isolated position.
Fig. 16
All the operations regarding putting into
service must be carried out by ABB
personnel or by suitably qualified customer
personnel with in-depth knowledge of the
apparatus and of the installation. Should
the operations be prevented, do not force
the mechanical interlocks and check that
the operating sequence is correct. The
operating forces which can be applied for
racking-in withdrawable circuit breakers
are indicated in paragraph 9.5.
1
10.2. Operation of the circuit
breaker
Closing
This can be carried out remotely by applying
voltage at the -SC2 input, or locally by pressing
the "I" pushbutton on the front of the circuit
breaker.
Opening
This can be carried out remotely by applying
voltage at the -SO2 or -SO3 input, or locally by
pressing the "O" pushbutton on the front of the
circuit breaker.
Opening in case of a power failure
Opening can be carried out remotely by means of
the control system, or locally by pressing the "O"
pushbutton on the front of the circuit breaker
within 60 s from the power failure.
Notes
• Manual emergency opening is possible even after the 60 s time limit.
• In the case of a power failure and after the 60 s time limit, the circuit
breaker remains in its present position.
If automatic opening is required after the 60 s time limit, Dip Switch
"I 1004/1" must be enabled (see par. 7.1.7. Auto-shutdown function for
low voltage of the capacitor/s).
2