Disconnect voltage the release. 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.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
Supply the shunt closing release its rated
voltage.
14/1 08
.
Carry out the operating tests.
The signals are given correctly.
Insert the auxiliary contacts suitable signalling
circuits.
The circuit-breaker closes correctly.
Open the circuit-breaker, turn the key and
remove from its seat.
Insert the auxiliary contacts suitable signalling
circuits.
Supply the spring loading geared motor the
corresponding rated voltage. The signal changes
over. Supply the undervoltage release the
corresponding rated voltage (if any). Then put the circuit-breaker the
connected, test isolated and disconnected
position.Putting into service
6.
Supply the shunt opening release the
corresponding rated voltage.
Open the circuit-breaker.
The circuit-breaker opens.2).
The locks function correctly.
Carry out some racking-in and out operations.
The springs are loaded correctly.
CAUTION
When there undervoltage release, the
circuit-breaker can only closed after the
release has been electrically energized.
Racking-in operation: the circuit-breaker racks
in correctly. Attempt circuit-breaker
closing operation.
Positive check
The spring loading lever moves correctly. The
signals are correct.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation. Carry out some circuit-breaker closing
and opening operations.
The signals are correct.
Both anual and electrical closing are
prevented.
Close the circuit-breaker. 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.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.
Model L3447
A pparatus Emax DC
S cale
D oc-N 1SDH000635R0002
Page No. The signals
are correct.
The circuit-breaker opens correctly.
C arry som sin and g
operations.
The signals due the relative operations are
given correctly.
The geared motor stops with the springs
loaded.
Note.
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
