Operation
166/214 Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
38 Feeder earthing and de-earthing
DANGER
High voltage! Danger! Do always observe the Five Safety Rules
➭ Isolate the switchgear.
➭ Secure against reclosing.
➭ Verify safe isolation from supply.
➭ Earth and short-circuit.
➭ Cover or barrier adjacent live parts.
DANGER
Danger! High voltage! The earthing process is not completed until the circuit-breaker is closed.
➭ Close the circuit-breaker after having switched the three-position disconnector to READY-
TO-EARTH position.
ATTENTION
Earthing under load will destroy the three-position disconnector.
➭ For circuit-breaker panels: Circuit-breaker panels cannot be operated when the
disconnecting function is mechanically interlocked (see page 148, "Opening the circuit-
breaker manually").
➭ For disconnector panels: Make sure that the feeder is isolated from supply.
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