Siemens NXAIR Operating Instructions Manual page 389

Preconditions
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Feeder earthing switch in OPEN position
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Circuit-breaker in OPEN position
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Panel set to local control
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Control door open
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Withdrawable circuit-breaker / circuit-breaker truck in service position or in test position
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For electromagnetic interlock (optional):
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Electromagnetic interlock deactivated
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Access mode indicator shows "M" or "T"
Procedure
To release the actuating opening for the double-bit key, lift the operating slide (1) and hold it.
Insert the double-bit key (2).
Fig. 705: Lifting the operating slide and inserting the key
To release manual access to the withdrawable circuit-breaker / circuit-breaker truck, turn the
double-bit key until the operating mode indicator changes to "H":
•
To change from "M" to "H", turn 90° counter-clockwise
•
To change from "T" to "H", turn 90° clockwise
Fig. 706: Turning the key counter-clockwise
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Panels with motor operating mechanism control
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Fig. 707: Turning the key clockwise
NXAIR / ≤ 40 kA
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