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