Switching On The Feeder Voltage Transformer - Siemens NXPLUS C Installation And Operating Instructions Manual

Operation
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29.2

Switching on the feeder voltage transformer

Mortal danger due to internal arc when the cover is open!
When the panel is live, operating the voltage transformer disconnecting facility device can
cause serious injury or death due to an internal arc.
➭ Operate the voltage transformer disconnecting facility only when the feeder is earthed.
To reconnect a earthed voltage transformer to the feeder, switch the voltage transformer
disconnector on again.
➭ Earth the feeder.
➭ Remove the cable compartment cover (see page 185, "Removing and mounting
the connection compartment covers").
➭ Insert the double-bit key (5 mm diameter) into the actuating opening of the voltage
transformer isolating device.
➭ Remove the padlock from the voltage transformer isolating device.
➭ Turn the double-bit key clockwise 180° swiftly and continuously.
✔ The switch position indicator of the voltage transformer isolating device shows
the CLOSED position.
➭ Refit and lock the padlock.
➭ Remove the double-bit key.
Fig. 158: Switching the voltage transformer isolating device to the CLOSED position
✔ The voltage transformer is connected to high voltage and secured against unauthorized
opening.
➭ Re-install the connection compartment cover (see page 185, "Removing and mounting
the connection compartment covers").
Revision 02 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 806-9004.9
DANGER