Panels with motor operating mechanism control
139-2021.9 / 07
NXAIR M
207
The following table gives an overview of the possible access mode indications, the corresponding operating
options and their preconditions.
Indicator
Access mode
Operating options
Access is released for
motor-operated racking
Racking the withdrawable circuit-breaker
electrically
from
test position to service position, or from service position to
test position
Preconditions for operating options:
Low-voltage connector plugged on
High-voltage door closed
Feeder earthing switch in OPEN position
Circuit-breaker in OPEN position
Control door closed and padlocked
Local or remote control
Access is released for
manual racking
Racking the withdrawable circuit-breaker
manually
from
test position to service position, or from service position to
test position
Preconditions for operating options:
High-voltage door closed
Feeder earthing switch in OPEN position
Circuit-breaker in OPEN position
Panel set to local control
Control door open
Racking interlocked
Closing the control door
Opening the high-voltage door
Taking the withdrawable circuit-breaker out of the
panel
Preconditions for operating options:
Circuit-breaker in OPEN position
Withdrawable circuit-breaker in test position
Panel set to local control
HINT
Blocking any racking operation is the precondition for opening the high-voltage
door.
Before opening the high-voltage door, set the access mode indicator to
“T”.