The KYN61A-40.5 air-insulated metal-clad withdrawable metal-enclosed switchgear is a new product jointly developed by our company and Xi'an High Voltage Apparatus Research Institute. It is equipped with a new type of fully insulated vacuum circuit breaker or sulfur hexafluoride (SF₆) circuit breaker inside the cabinet. Moreover, the cabinet body adopts an assembled structure, which endows the product with a beautiful appearance, improves the mating accuracy between the handcart and the cabinet body, enables rapid organization of production and assembly, ensures timely delivery, enhances the utilization of the floor area required for assembly, and facilitates mass production. It also allows for door-closed operation. All normal operations of the switchgear, including the opening and closing of the circuit breaker, and the movement of the circuit breaker handcart to the working position as well as its retraction to the test and isolation positions, can be carried out with the high-voltage compartment door closed.