Siemens NXAIR M - Page 207

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”.