Operation
168/214 Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
39 Operating the busbar make-proof earthing switch
39.1 Control elements and indicators
The busbar earthing switch is equipped with a manual high-speed closing facility for
make-proof earthing of the busbar.
The cover of the actuating opening is interlocked electromechanically.
Optionally, the control gate can be padlocked in one of the two switch positions.
Fig. 192: Manual operating mechanism for
busbar earthing switch (basic scheme)
①
Additional compartment for
operating mechanism of
busbar earthing switch
②
Position indicator
③
Actuating opening
④
Operating spindle
at the operating lever
Fig. 193: Operating lever for busbar earthing switch
(basic scheme)
DANGER
High voltage! Danger! By no means may the busbar make-proof earthing switch be operated
under load, as it will be destroyed in case of repetition.
➭ Observe the Five Safety Rules.
➭ Disconnect the incoming and outgoing feeders in all panels.
NOTE
Once started, a switching operation is totally completed by the motor operating mechanism
control to prevent intermediate positions. Starting another switching operation or switching
back in the course a switching operation is not possible.
➭ Wait for completion of a started switching operation before starting another switching
operation.
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