The circuit-breaker opens correctly.Putting into service
6.
P itiv ck
The spring loading lever moves correctly. The signals
are correct.
Open the circuit-breaker.
The locks function correctly.
Racking-in operation: the circuit-breaker racks
in correctly.
Open the circuit-breaker, turn the key and
remove from its seat.
The signals are given correctly. The signal changes
over.
The geared motor reloads the springs after
each closing operation.
Insertthe auxiliary contacts suitable signalling
circuits.
The geared otor stops with the springs
loaded.
Insertthe auxiliary contacts suitable signalling
circuits.2).
Carry out the operating tests.
C arry som sin and ning
operations. Supply the undervoltage release the
corresponding rated voltage (if any).
Disconnect voltage the release.
Note.
Model 2234 Apparatus Scale
L 2778
Doc-Na 1SDH000460R0002
Page No.
Supply the spring loading geared motor the
corresponding rated voltage.
Carry out some racking-in and out operations.
The circuit-breaker closes correctly.
The signals are correct. Attempt circuit-breaker
closing operation.
Supply the shunt closing release its rated
voltage. 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.
15/158
.
The circuit-breaker opens.
The signals due the relative operations are
given correctly.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
The circuit-breaker closes correctly.
Supply the shunt opening release the
corresponding rated voltage.
The springs are loaded correctly. The
signals are correct.
Both anual and electrical closing are
prevented.
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. Then put the circuit-breaker the
connected, test isolated and disconnected
position.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.
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.
Close the circuit-breaker. The signals
are correct
