Switch device

A switch device, comprising:

• a first three-position switch;
• a second three-position switch disposed below the first three-position switch;
• a circuit breaker disposed between and coupled to the first three-position switch and the second three-position switch, wherein the first three-position switch is configured to implement bus coupling, and the second three-position switch is configured to implement bus rising;
• a first interlock unit disposed above the circuit breaker and coupled to the circuit breaker and the first three-position switch, and configured to block a manual operation of the first three-position switch in a closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the first three-position switch is manually operated in an open state of the circuit breaker;
• and
• a second interlock unit disposed below the circuit breaker and coupled to the circuit breaker and the second three-position switch, and configured to block a manual operation of the second three-position switch in the closed state of the circuit breaker, and configured to block a manual closing operation of the circuit breaker while the second three-position switch is manually operated in the open state of the circuit breaker, wherein the first interlock unit and the second interlock unit are respectively configured to switch between a locked position and a released position, wherein at the locked position, the manual operation of the first three-position switch and the second three-position switch is not allowed, and at the released position, the manual operation of the first three-position switch and the second three-position switch is allowed, and the circuit breaker comprises a rotatable main shaft, the first interlock unit and the second interlock unit are each selectively engaged with the rotatable main shaft, and are respectively configured to:
• when the circuit breaker is closed, the first interlock unit and the second interlock unit are locked by the rotatable main shaft to be at the locked position to block the manual operation of the first three-position switch and the second three-position switch, and when the circuit breaker is opened, the first interlock unit and the second interlock unit are released by the rotatable main shaft to be at the released position to allow the manual operation of the first three-position switch and the second three-position switch.