L3692
Tmax T8
9/39
Doc N°
Mod.
Apparatus
Scale
Page N°
1SDH000682R0002
L3885
L5757
6. Putting into service
6.1 General
procedures
– Make sure that the power connections to the circuit-breaker terminals are tight
– Perform al the preparatory operations on the release
– Make sure that the power supply voltage of the auxiliary circuits is between 85% and 110% of the rated voltage of the electrical applications
– To avoid temperature rises, make sure that there is suffi cient air exchange in the installation area
– Also perform the inspections indicated in the following table.
Item inspected
1 Manual operating mechanism
2 Gearmotor (if provided)
3 Undervoltage release
(if provided)
4 Shunt closing release (if provided)
5 Shunt closing release (if provided).
6 Lock for circuit-breaker in open position
(key or padlock)
7 Auxiliary circuit-breaker contacts
Procedure
Perform a few opening, closing and release
operations (see chap. 7.2).
WARNING
When there is an undervoltage release, the cir-
cuit-breaker can only be closed after the release
itself has been electrically energized.
Supply the spring loading gearmotor at the
relative rated voltage.
Perform a few closing and opening operations.
Note. Supply the undervoltage release at the
relative rated voltage (if provided).
Supply the undervoltage release at the relative
rated voltage and perform the circuit-breaker
closing operation.
Turn off the voltage supply to the release.
Supply the undervoltage release at the relative
rated voltage and perform the circuit-breaker
closing operation.
Close the circuit-breaker.
Supply the shunt opening release at the relative
rated voltage.
Open the circuit-breaker.
Power the shunt closing release at the its
rated voltage.
Open the circuit-breaker, turn the key and
remove it. Attempt the circuit-breaker closing
operation.
Insert the auxiliary contacts into appropriate
signalling circuits. Perform a few circuit-breaker
closing and opening operations.
Successful check
The spring loading lever moves normally.
The springs are loaded normally.
The signals are normal.
The gearmotor stops when the springs have
been loaded.
The gearmotor reloads the springs after each
closing operation.
The circuit-breaker closes normally. The signals
are normal.
The circuit-breaker opens. The signal changes
over.
The circuit-breaker opens normally. The signals
are normal.
The circuit-breaker closes normally. The signals
are normal.
Both manual and electrical closing are pre-
vented.
Signalling occurs normally.
