Opening; Emergency Release Of The Interlock With Solenoids At The Busbar Earthing Switch - Siemens 8DA10 Series Installation And Operating Instructions Manual

861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
38.3

Opening

Fig. 208: Opening the busbar earthing switch
➭ Push the control gate to the left.
The position indicator changes to faulty position.
➭ Hold the operating lever in horizontal position.
➭ Insert the operating lever in the actuating opening as far as it will go. Observe the position
of the operating spindle.
➭ Turn the operating lever 180° counter-clockwise.
➭ Remove the operating lever.
➭ The position indicator changes from faulty position to OPEN position.
✔ The control gate returns to its initial position.
✔ The busbar earthing switch is open.
➭ Optionally: Padlock the control gate.
38.4 Emergency release of the interlock with solenoids at the busbar earthing
switch
Explosion hazard due to internal arc
Can cause serious injury or property damage. When the interlocking of the control gate is
eliminated, switching operations are possible that can cause an arc fault.
➭ Do only eliminate the interlocking of the control gate when the three-position
disconnector is in no-load condition.
➭ Use a screwdriver suitable for the diameter of the openings.
To push the control gate from center position to right position:
➭ Remove the left-hand plastic split rivet.
➭ Insert the screwdriver into the left-hand opening and push the solenoid back.
➭ Push the control gate to the right.
➭ Pull out the screwdriver.
➭ Push the control gate to the right as far as it will go.
➭ Reinstall the left-hand plastic split rivet.
✔ The left-hand solenoid is released again, blocking further movements.
WARNING
Operation
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