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Warning!
2
1
Fig. 15
Fig. 16
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10. Putting into service
10.1. General procedures
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.
Proceed as follows:
– disconnect the power supply voltage and take the circuit-breaker to the
isolated position.
– couple the crank handle (1) in the seat (2)
– turn the crank handle (1) clockwise as far as the end-of-run position
10.2. Operation of the circuit-breaker
10.2.1 Closing
This can be carried out remotely by applying voltage to the relative input
or locally by pressing the "I" pushbutton on the front of the circuit-breaker
or on the panel HMI.
10.2.2 Closing in the case of a power failure
Closing is not advisable and is not possible.
10.2.3 Opening
This can be carried out remotely by applying voltage to the relative input
or locally by pressing the "O" pushbutton on the front of the circuit-breaker
or on the panel HMI (fig. 16).
10.2.4 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 30 seconds from the auxiliary power failure (circuit-breaker in closed
position).
10.2.5 Manual emergency opening
Use the crank handle 1 (fig. 15) for manual emergency operation.
Notes
– Manual emergency opening is possible even after the 30 s time limit.
– In the case of a power failure and after the 30 s time limit, the circuit-breaker remains
in its present position. If automatic opening is required after the 30 s time limit, the
relative function must be activated.
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