Operating The Busbar Make-Proof Earthing Switch; Control Elements And Indicators - Siemens 8DB10 Installation And Operating Instructions Manual

Operation
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39

Operating the busbar make-proof earthing switch

39.1

Control elements and indicators

Fig. 192: Manual operating mechanism for
busbar earthing switch (basic scheme)
Fig. 193: Operating lever for busbar earthing switch
(basic scheme)
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.
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.
Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
① Additional compartment for
operating mechanism of
busbar earthing switch
②
Position indicator
③ Actuating opening
④ Operating spindle
at the operating lever