At present, KYN type high pressure switchgear is widely used in landfill leachate treatment equipment. KYN28A - 12 indoor armoring open ac metal-enclosed switchgear, for 3 to 10 kv three-phase ac 50 hz, the single bus and the bus section system of indoor complete sets of power distribution equipment, to achieve control of protection, monitoring KYN28-12 indoor armoring open ac metal-enclosed switchgear, cabinet put oneself in another's position is sheathed type structure, the type of layout, divided into breaker room, main bus-bar room, cable chamber and relay control room. In order to make the leachate treatment cabinet have the ability to withstand the internal fault electric isolation, except outside the relay, each functional compartment is provided with exhaust channel and pressure relief window, the primary contact is a round binding contact, and the switchgear is equipped with safe and reliable interlocking device, which can safely meet the "five prevention" locking requirements. The details are as follows:

1. When the handcar is in the working position, the secondary plug is locked and cannot be removed.

2, circuit breaker handcart only in the swab inspection position or working position, to promote the operation of closing, and in the circuit breaker after closing, handcart can not be pulled out from the working position.

3, the circuit breaker hand car in the process of pushing or pulling out, can not close.

4. Only when the ground switch is in the opening position, the circuit breaker handcar can be moved from the test position to the working position, and only when the circuit breaker handcar is in the test position or outside the cabinet, the ground switch can be opened and closed.

5. When the grounding switch is in the opening position, the back door cannot be opened.

Circuit breaker room on both sides of the chassis frame in addition to the sets for the handcart movement of the fixed guide rail, to facilitate observation was carried out on the circuit breaker and check, specially equipped with the extension of taking on both sides of the fixed guide rail guideway, after the brake circuit breaker points, can pull two extension guideway ark, this handcart can extend from inside to the outside of the tank directly on the guide rail.