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