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