S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
Disconnect voltage the release.
Model 2234 Apparatus Scale
L 2778
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Page No.
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Insertthe auxiliary contacts suitable signalling
circuits.1 eneral s
- Check tightness the power connections the circuit-breaker terminals
- Carry out all the preparatory operations the release
- Make sure that the value the auxiliary circuit power supply voltage between and 110% the rated voltage the electrical applications
- Make sure that there adequate air circulation the place installation avoid overheating
- Also carry out the checks specified the following table. The signal changes
over.
Both anual and electrical closing are
prevented.
Supply the shunt closing release its rated
voltage.
Insertthe auxiliary contacts suitable signalling
circuits.
The signals due the relative operations are
given correctly.
Racking-in operation: the circuit-breaker racks
in correctly. The
signals are correct.
The circuit-breaker opens. Interlocking
devices between circuit-breakers side by
side and one top another (if any)
10 For withdrawable circuit-breakers: racking
-in/out device
P re
Carry out some opening and closing operations
(see the chapter 7. Then put the circuit-breaker the
connected, test isolated and disconnected
position.
The geared otor stops with the springs
loaded.
The signals are given correctly.
ite d
1 Manual operating mechanism
2 Geared motor (if any)
3 Undervoltage release
(if any)
4 Shunt opening release (if any)
5 Shunt closing release (if any)
6 Circuit-breaker lock the open position
(with key padlocks)
7 Auxiliary contacts the circuit-breaker
8 Auxiliary contacts for signalling circuit-
breaker connected, test isolated and
disconnected
9 Lock vice circ it-b rs
connected and disconnected. Carry out some circuit-breaker closing
and opening operations.Putting into service
6.
Carry out some racking-in and out operations.
The geared motor reloads the springs after
each closing operation.
Open the circuit-breaker. Attempt circuit-breaker
closing operation.
The signals are correct.
CAUTION
When there undervoltage release, the
circuit-breaker can only closed after the
release has been electrically energized.
P itiv ck
The spring loading lever moves correctly.
The locks function correctly.
The springs are loaded correctly.
The circuit-breaker opens correctly.
Carry out the operating tests. The first turns the crank handle
do not meet with particular resistance. The signals
are correct.2). Supply the undervoltage release the
corresponding rated voltage (if any).
The circuit-breaker closes correctly.
Close the circuit-breaker. The signals
are correct.
Open the circuit-breaker, turn the key and
remove from its seat.
Supply the spring loading geared motor the
corresponding rated voltage.
C arry som sin and ning
operations.
Note.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
Supply the shunt opening release the
corresponding rated voltage.
The circuit-breaker closes correctly
