Prevent energized closing with load.

The vacuum circuit breaker carriage within the high-voltage distribution cabinet failed to reach the working position after closing at the test location.

2. Prevent grounding wire from closing with the switch.

The grounding switch within the high-voltage distribution cabinet prevents the draw-out circuit breaker from closing when in the closed position.

3. Prevent Accidental Entry into Live Spaces

During the closing operation of the vacuum circuit breaker within the high-voltage distribution cabinet, the cabinet's rear door is mechanically locked in place using the grounding knife on the switchgear.

4. Prevent live-line grounding:

The vacuum circuit breaker within the high-voltage distribution cabinet failed to close properly during operation, and the grounding switch could not be engaged.

5. Prevent loaded circuit breaker operation:

The vacuum circuit breaker within the high-voltage distribution cabinet is unable to exit the working position of the mobile circuit breaker during the operation of closing and running.