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