Operation
212/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
25 Operating the feeder voltage transformer
25.1 Disconnecting the feeder voltage transformer
Voltage transformers can be disconnected from the feeder and earthed via the voltage
transformer disconnector. The voltage transformer disconnector is located in the cable
compartment.
➭ Earth the feeder.
➭ Undo the fixing bolts of the cable compartment cover.
➭ Remove the cable compartment cover.
➭ Insert the double-bit key (5 mm diameter) into the actuating opening.
➭ Remove the padlock.
➭ Turn the double-bit key swiftly and continuously 180° counter-clockwise.
Fig. 178: Switching the voltage transformer disconnector to EARTHED position
✔ The position indicator shows the EARTHED position.
➭ Refit and lock the padlock.
➭ Remove the double-bit key.
✔ The voltage transformer is isolated from high-voltage, earthed, and secured against
reclosing.
DANGER
Internal arcing and explosion hazard
Will cause death, injury or considerable property damage.
When the panel is live, switching the voltage transformer disconnector can cause an internal
arc.
➭ Operate the voltage transformer disconnector only when the feeder is earthed.
Fig. 177: Voltage transformer disconnector
①
Actuating opening for double-bit key
②
Opening for padlock
③
Position indicator
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