Both anual and electrical closing are
prevented.
Open the circuit-breaker.
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.Putting into service
6. Attempt circuit-breaker
closing operation.
P itiv ck
The spring loading lever moves correctly.
Disconnect voltage the release.
Close the circuit-breaker.
Carry out some racking-in and out operations.
The signals are correct. 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.
Open the circuit-breaker, turn the key and
remove from its seat.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
Supply the shunt closing release its rated
voltage. The first turns the crank handle
do not meet with particular resistance. Supply the undervoltage release the
corresponding rated voltage (if any).
Supply the shunt opening release the
corresponding rated voltage. Then put the circuit-breaker the
connected, test isolated and disconnected
position.
Carry out the operating tests.
The circuit-breaker opens. The signals
are correct.
The geared motor reloads the springs after
each closing operation. Carry out some circuit-breaker closing
and opening operations. The signals
are correct.
Insertthe auxiliary contacts suitable signalling
circuits.
The circuit-breaker closes correctly. The signal changes
over.
The springs are loaded correctly.
C arry som sin and ning
operations.
The signals are given correctly.2).
Model 2234 Apparatus Scale
L 2778
Doc-Na 1SDH000460R0002
Page No.
The circuit-breaker opens correctly.
Supply the spring loading geared motor the
corresponding rated voltage.
Racking-in operation: the circuit-breaker racks
in correctly.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
The geared otor stops with the springs
loaded.
The locks function correctly.
Note.
CAUTION
When there undervoltage release, the
circuit-breaker can only closed after the
release has been electrically energized.
15/158
.
Insertthe auxiliary contacts suitable signalling
circuits.
The circuit-breaker closes correctly.
The signals due the relative operations are
given correctly.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
signals are correct
