Siemens NXAIR - Positions of the Withdrawable Circuit-Breaker; Circuit-Breaker Truck

Operating the circuit-breaker panel
46 NXAIR / ≤ 40 kA 110-0134.9 / 14
10.7 Positions of the withdrawable circuit-breaker / circuit-breaker truck
General description of positions of the withdrawable circuit-breaker / circuit-breaker truck:
Service position
The withdrawable circuit-breaker / circuit-breaker truck is connected with the busbar system and the outgoing
feeder. The auxiliary circuit of the withdrawable circuit-breaker / circuit-breaker truck is connected through
the low-voltage connector.
Test position
The withdrawable circuit-breaker / circuit-breaker truck is disconnected from the busbar system and the
outgoing feeder. The auxiliary circuit of the withdrawable circuit-breaker / circuit-breaker truck is connected
through the low-voltage connector.
Disconnected position
The withdrawable circuit-breaker / circuit-breaker truck is disconnected from the busbar system and the
outgoing feeder. The auxiliary circuit is disconnected by pulling out the low-voltage connector.
Short instruction for racking the withdrawable circuit-breaker / circuit-breaker truck:
Racking the withdrawable circuit-breaker / circuit-breaker truck manually from test / disconnected position to
service position:
Step 1
Insert and turn double-bit key
Step 2
Insert and turn
racking crank
as far as it will go
and pull it off
Step 3
Turn and remove double-bit key
from
by
to
from
by
to
Racking the withdrawable circuit-breaker / circuit-breaker truck manually from service position to
test / disconnected position:
Step 1
Insert and turn double-bit key
Step 2
Insert and turn
racking crank
as far as it will go
and pull it off
Step 3
Turn and remove double-bit key
from
by
to
from
by
to
90°
90°
90°
90°