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