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