Test Operation - Siemens NXAIR Installation Instructions Manual

Commissioning procedure
Check each panel to establish whether the withdrawable part / switching-device truck can only
be racked to service position when the circuit-breaker and the earthing switch are in OPEN
position and the high-voltage door is closed.
Check all circuit-breaker panels to establish whether the circuit-breakers can only be operated
when the respective withdrawable parts / switching-device trucks are in interlocked end position
(test or service position).
Check all switch-disconnector panels to establish whether the switch-disconnector fuse
combination can only be operated when the feeder earthing switch is in OPEN position.
Check all earthing switches to establish whether the earthing switches can only be operated
when the respective withdrawable parts / switching-device trucks are in test position.
Check all earthing switches to establish whether the earthing switches can only be operated
when the switch-disconnector fuse combination is in OPEN position in the switch-disconnector
panel.
Check whether the high-voltage doors can only be opened when the associated withdrawable
parts / switching-device trucks are in interlocked test position.
Check whether the high-voltage doors can only be opened when the switch-disconnector fuse
combination is in OPEN position in the switch-disconnector panel.

14.7 Test operation

By means of test operations, correct operation of the panels is verified before commissioning without being
endangered by operational high voltage.
Preparing test operation
Switch the auxiliary voltage on.
✓
The motors of the circuit-breaker operating mechanisms now start up and charge the closing
springs.
208
DANGER
Electric shock
Touching live parts causes electric shock
Do not switch on operational high-voltage during test operation!
CAUTION
Motor noise
When auxiliary voltage is applied, a motor inside the circuit-breaker starts
immediately in order to charge the spring energy store. This is a permissible
operating state.
Expect motor noise and low vibration.
NXAIR /
≤
40 kA 110-0084.9 / 15