Switch cabinet structure GB3906-2006 and IEC298 armored metal closed switch equipment standard design, the whole by the cabinet body and withdrawable part (handcart) two grade composition. The cabinet body is of assembly type, bolted and assembled, and the switch cabinet body is separated into circuit breaker room, main bus room, cable cavity and relay instrument room by metal partition. The enclosure protection grade is IP3X, each compartment protection grade is IP2X, and all metal structures are reliably grounded. The compartments of the main loop system have independent exhaust pressure release channels.

Handcars can be divided into circuit breaker handcars, voltage transformer handcars, metering handcars, isolation handcars, etc., all kinds of handcars have the same dimensions, handcars for the same purpose have good interchangeability; The handcar has test/isolation position and working position in the cabinet, and each position is equipped with interlock device to ensure that the handcar cannot move casually when it is in the above two positions.