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.
Model 2234 Apparatus Scale
L 2778
Doc-Na 1SDH000460R0002
Page No.
Carry out the operating tests. The first turns the crank handle
do not meet with particular resistance.
The geared otor stops with the springs
loaded.
Supply the spring loading geared motor the
corresponding rated voltage.
The circuit-breaker opens correctly.
Supply the shunt closing release its rated
voltage.
The signals are given correctly. Carry out some circuit-breaker closing
and opening operations.
Disconnect voltage the release.
The springs are loaded correctly. The signals
are correct. The signal changes
over.
P itiv ck
The spring loading lever moves correctly.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
The signals are correct.
Open the circuit-breaker.
The locks function correctly.
The signals due the relative operations are
given correctly. Then put the circuit-breaker the
connected, test isolated and disconnected
position. The signals
are correct.
Insertthe auxiliary contacts suitable signalling
circuits.
The circuit-breaker opens.
Both anual and electrical closing are
prevented.
C arry som sin and ning
operations.
The geared motor reloads the springs after
each 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 7.2).
Insertthe auxiliary contacts suitable signalling
circuits.
The circuit-breaker closes correctly.
15/158
.
Note.Putting into service
6. The
signals are correct.
CAUTION
When there undervoltage release, the
circuit-breaker can only closed after the
release has been electrically energized. Supply the undervoltage release the
corresponding rated voltage (if any).
Open the circuit-breaker, turn the key and
remove from its seat.
Racking-in operation: the circuit-breaker racks
in correctly. Attempt circuit-breaker
closing operation.
Carry out some racking-in and out operations.
S upply the undervoltage release the
corresponding rated voltage and carry out the
circuit-breaker closing operation.
Close the circuit-breaker.
The circuit-breaker closes correctly.
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 shunt opening release the
corresponding rated voltage
