Selecting Interlocking - Siemens NXAIR Operating Instructions Manual

Preconditions
•
Feeder earthing switch in OPEN position
•
Circuit-breaker in OPEN position
•
Panel set to local control
•
Control door open
•
Withdrawable circuit-breaker / circuit-breaker truck in service position or in test position
•
Double-bit key for selecting racking mode inserted and access mode indicator shows "H"
Procedure
To release electrical access to the withdrawable circuit-breaker / circuit-breaker truck, turn
the double-bit key 90° clockwise until the operating mode indicator changes to "M".
Fig. 709: Turning the key clockwise
Remove the double-bit key and push the operating slide downwards as far as it will go.
Close the control door.
Fit a padlock to the control door and close it.
✓
Racking the withdrawable circuit-breaker / circuit-breaker truck is set to electrical operation.

27.6 Selecting interlocking

110-0134.9 / 14
Panels with motor operating mechanism control
NOTICE
Conflicting operation
The requirement of setting the panel to either local or remote control prevents
operating the panel locally and centrally at the same time.
For any local operations ─ manual or electrical ─ set the panel to local
control, for example by switching the local-remote switch to LOCAL
position.
INFORMATION
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".
NXAIR / ≤ 40 kA
from
to
391