NXAirS Withdrawable Metal-enclosed Switchgear, Rated Voltage Up to 12kV
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Operation of NXAirS
13.9 Feeder earthing
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Removable part is in test position.
Preconditions
Danger!
Once the operation is started, it must be finished, because the handle cannot be stopped during
the operation nor reverse rotation. Operating handle cannot be taken out in the middle position.
Operating handle cannot be taken out in the middle position.
Operating hole of earthing switch for feeders and the indicator for switch status are
located at the lower left of HV room door. Operating hole is blocked by an additional
sliding baffle plate.
Danger!
The unstable auxiliary voltage will impact the electrical interlock and mechanical interlock. If
the interlock mechanism moves upwards, manual operation is not allowed due to the electrical
interlock.
Please pay attention to the five safety rules (refer to Page 3 “Normal description”).
Prior to manual operation, ensure to perform necessary external unlock at first.
Operating procedures
Attention!
If the operating handle is not inserted correctly, it may result in the damage of earthing switch.
Insert the operating handle into the operating hole and push it to limit place.
Open the padlock (option).
Pull the sliding baffle plate on the hole of operating handle upwards, and the
operating hole is open.
Insert the operating handle of earthing switch for feeders into the operating hole.
Rotate the operating handle clockwise by 90˚.
