Environment-friendly gas insulation ring main unit

The invention discloses an environment-friendly gas insulation ring main unit which comprises a cabinet body, a three-position switch, a three-position mechanism, a circuit breaker main loop and a circuit breaker mechanism, the three-position switch, the three-position mechanism, the circuit breaker main loop and the circuit breaker mechanism are installed in the cabinet body, and an interlocking device is connected between the three-position mechanism and the circuit breaker mechanism and is used for preventing hot-line operation of the three-station mechanism. The three-station switch comprises an insulating main shaft, an indicating device comprises an indicating main shaft, the insulating main shaft is connected with the indicating main shaft, a traditional three-station structure is optimized, the depth of the switch is increased, and the distance between phases and the distance to the ground of isolation knives are guaranteed; an isolation knife structure suitable for environment-friendly gas is designe