Siemens NXAIR Operating Instructions Manual page 345

Air-insulated switchgear ≤ 17.5 kv / ≤ 40 ka / ≤ 4000 a busbar current

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Install the labyrinth.

Fig. 639: Labyrinth installed, front

Fix the labyrinth by screwing the outermost nuts hand-tight:

2 nuts M8 with contact washers

Tighten the nuts with a tightening torque of 25 Nm.

Fig. 641: 2 bolted joints at front of labyrinth

Tighten the fixing bolts at the top side of the labyrinth hand-tight:

4 bolts M8x16 with contact washers

Tighten the bolts with a tightening torque of 25 Nm.

Fig. 642: 4 bolted joints at top side of labyrinth

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Accessing the connection compartment through the front

Fig. 640: Labyrinth installed, top side

NXAIR / ≤ 40 kA

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