864-5091.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • Revision 06 167/214
Operation
38.1 Feeder earthing
➭ Switch the three-position disconnector to READY-TO-EARTH position
(see page 155, "Activating the ready-to-earth function manually").
➭ Close the circuit-breaker (see page 148, "Closing the circuit-breaker manually").
➭ Pull the moving part of the "feeder earthed" locking device upwards.
➭ Padlock the locking device.
38.2 Feeder de-earthing
➭ Remove the padlock at the “feeder earthed” locking device.
✔ The moving part of the locking device folds downwards.
➭ Open the circuit-breaker (see page 148, "Opening the circuit-breaker manually").
➭ Switch the three-position disconnector to OPEN position
(see page 157, "Deactivating the ready-to-earth function manually").
ATTENTION
If the "feeder earthed" locking device is activated and padlocked, the circuit-breaker cannot be
opened, neither electrically nor mechanically. Operating the circuit-breaker locking device with
the disconnector in OPEN or CLOSED position can damage the switchgear.
➭ Operate the circuit-breaker locking device only in the EARTHED position, and secure it with
a padlock.
NOTE
In circuit-breaker operating mechanisms with undervoltage release, the circuit-breaker trips
automatically after removing the padlock if
➭ the panel is earthed and
➭ auxiliary voltage is available.
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