Open the circuit-breaker.
The signals due the relative operations are
given correctly. The
signals are correct.
The geared motor reloads the springs after
each closing operation. The first turns the crank handle
do not meet with particular resistance.
Supply the spring loading geared motor the
corresponding rated voltage.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation. The signals
are correct.
Both anual and electrical closing are
prevented.
The signals are correct.
Note.
Supply the shunt opening release the
corresponding rated voltage.
The locks function correctly.
Supply the shunt closing release its rated
voltage.
Close the circuit-breaker.
Insert the auxiliary contacts suitable signalling
circuits.
The signals are given correctly.
Positive check
The spring loading lever moves correctly.
The geared motor stops with the springs
loaded.
The springs are loaded correctly. Then put the circuit-breaker the
connected, test isolated and disconnected
position.1 eneral res
- 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
Procedure
Carry out some opening and closing operations
(see the chapter 7. Carry out some circuit-breaker closing
and opening operations.
C arry som sin and g
operations.
Carry out some racking-in and out operations.
CAUTION
When there undervoltage release, the
circuit-breaker can only closed after the
release has been electrically energized.
The circuit-breaker closes correctly.
Item inspected
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 vice irc it-b rs
connected and disconnected. The signals
are correct.
14/1 08
.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
The circuit-breaker opens.
Open the circuit-breaker, turn the key and
remove from its seat.
The circuit-breaker closes correctly.
Racking-in operation: the circuit-breaker racks
in correctly.
The circuit-breaker opens correctly.
Disconnect voltage the release. Supply the undervoltage release the
corresponding rated voltage (if any).Putting into service
6. The signal changes
over.
Carry out the operating tests.
Model L3447
A pparatus Emax DC
S cale
D oc-N 1SDH000635R0002
Page No.2). Attempt circuit-breaker
closing operation.
Insert the auxiliary contacts suitable signalling
circuits
