Typical design scheme of environmental gas cabinet

Single gas chamber, single bus and segmented scheme are adopted. Single main gas line, three station isolation switch and vacuum circuit breaker are installed in the single gas chamber. A system diagram of the feeder is shown in Figure 1.

The following picture is the overall structure of the environmental gas switch cabinet

The following figure is to prevent misoperation and chain structure.

(1) after the circuit breaker is closed, the three station switch can not operate and the three station switch can operate.

(2) after the insertion of the handle, the three station mechanism can not operate electrically, and the circuit breaker can not operate.

(3) the three station isolating switch is not in place, and the circuit breaker can not be closed.

(4) the circuit breaker can be divided into closing operation when the three station isolation switch is isolated and separated, and the circuit breaker can be closed at the ground position, but only after closing the cable door, the circuit breaker can carry out the operation.

(5) if the three station isolating switch is not in the three locations above, the circuit breaker can not be closed.

(6) manual operation of the three station isolating switch can not continue to rotate when it is in the working position, and the electric operation does not need to be manually unlocked.

(7) the three station switch in the grounding position and the circuit breaker at the closing position can open the cable door; only after the closing of the cable door can the operation of the split circuit breaker operation and the split switch operation be carried out.