Operating The Feeder And Busbar Earthing Switches - Siemens 8BT2 Installation And Operating Instructions Manual

6.10.

Operating the feeder and busbar earthing switches

Closing the earthing switch
Preconditions •
for the
operation
•
Procedure
82
Fig90. Actuating hole of earthing switch
The feeder and busbar earthing switches a r e operated bottom-right beside the high-voltage
compartment door.
DANGER!
Once you have started a switching operation, you must complete it; turning back is
blocked. The operating tool cannot be removed at intermediate positions.
Move the operating tool until reaching the end position.
ATTENTION!
Safe operation of the earthing switch is not guaranteed if the penetration of the earthing
blade is beyond the tolerance. If the penetration is beyond the tolerance:
Do not put the earthing switch in operation.
Contact the local SIEMENS representative to make the fine adjustment.
ATTENTION!
If the operating lever is not inserted correctly, the earthing switch may be damaged.
Insert the operating lever in the actuating opening as far as it will go.
ATTENTION!
Make sure that there is no electromechanical interlock on the earthing switch.
Do perform electromechanical interlock's conditions to unlock before the operation.
Withdrawable device truck interlocked in TEST
position
or: Withdrawable device truck not in the panel.
Push the covering sleeve inwards which closes the
actuating opening of the earthing switch.
Insert the operating lever for the feeder earthing
switch into the opening.
Turn the operating lever clockwise approx. 90° into
CLOSED position.
Revision 04 * INSTALLATION AND OPERATING INSTRUCTIONS 8BT2 * 881-4027.9
Opening the earthing switch
•
Withdrawable device truck interlocked in TEST
position
•
or: Withdrawable device truck not in the panel.
Push the covering sleeve inwards which closes
the actuating opening of the earthing switch.
Insert the operating lever for the feeder earthing
switch into the opening.
Turn the operating lever counter-clockwise
approx. 90° into OPEN position.