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