L2275
Emax UL
13/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
6.
Putting into service
6.1
General procedures
– Check tightening of the power connections at the power circuit breaker terminals
– Carry out all the preparation operations of the trip unit
– Check that the value of the auxiliary circuit power supply voltage is between 85 and 110% of the rated voltage of the electrical applications
– Check that there is sufficient air exchange in the place of installation to avoid overtemperatures
– Also carry out the checks indicated in the following table.
Item inspected
1 Manual operating mechanism
2 Geared motor (if provided)
3 Undervoltage release (if provided)
4 Shunt trip (if provided)
5 Closing coil (if provided)
6 Power circuit breaker lock in the open
position (with key or padlocks)
7 Auxiliary contacts of the power circuit
breaker
8 Auxiliary contacts for signaling power cir-
cuit breaker connected, test connected
and disconnected
9 Lock devices for power circuit breaker
racked-in and racked-out. Interlocking de-
vices between power circuit breakers side
by side and on top of each other (if pro-
vided)
10 For draw out power circuit breakers: rack-
ing-in/out device
Procedure
Carry out some opening and closing opera-
tions (see the cap. 7.2).
CAUTION
When there is an undervoltage release, the
power circuit breaker can only be closed after
having electrically energized the trip unit itself.
Supply the spring charging geared motor at the
relative rated voltage.
Carry out some closing and opening opera-
tions.
Note. Supply the undervoltage release at the
relative rated voltage (if provided)
Supply the undervoltage release at the relative
rated voltage and carry out the power circuit
breaker closing operation.
Remove voltage to the trip.
Supply the undervoltage release at the relative
rated voltage and carry out the power circuit
breaker closing operation.
Close the power circuit breaker.
Supply the shunt trip at the relative rated
voltage
Open the power circuit breaker.
Supply the closing coil at its rated voltage.
Open the power circuit breaker, turn the key
and remove it from its seat. Attempt the power
circuit breaker closing operation.
Insert the auxiliary contacts in suitable signaling
circuits. Carry out some power circuit breaker
closing and opening operations.
Insert the auxiliary contacts in suitable signaling
circuits. Then put the power circuit breaker in
the connected, test connected and discon-
nected position.
Carry out the operating tests
Carry out some racking-in and out operations
Positive check
The spring charging lever moves correctly.
The springs are charged correctly.
The signals are correct.
The geared motor stops with the springs
charged.
The geared motor recharges the springs after
each closing operation.
The power circuit breaker closes correctly.
The signals are correct.
The power circuit breaker opens.
The signaling changes over.
The power circuit breaker opens correctly.
The signals are correct.
The power circuit breaker closes correctly.
The signals are correct.
Both manual and electrical closing are pre-
vented.
The signals are given correctly.
The signals two to the relative operations are
given correctly.
The locks function correctly.
Racking-in operation: the power circuit breaker
racks in correctly. The first turns of the crank
handle do not meet with any particular resist-
ance.
