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