A handcart:
The handcart frame is made of thin steel plate processed by CNC machine tool and riveted and welded. According to the purpose, the handcart can be divided into circuit breaker handcart, voltage transformer handcart, partition handcart, metering handcart, etc. handcarts of the same specification can be easily interchanged. The handcart has isolation position, test position and working position in the cabinet, and each position is equipped with positioning device to ensure that the handcart cannot move freely when it is in the above position, and the interlock must be released when it is moved.

B bus room:
The bus is led from one switchgear to another and fixed through branch bus and static contact box. The flat branch bus is connected to the static contact box and the main bus through bolts without any other clamps or insulators. In case of special needs of users and projects, the connecting bolts on the bus bar can be encapsulated with insulation and end caps. When the bus passes through the partition of switch cabinet, it shall be fixed with bus bushing. In case of internal fault arc, it can limit the spread of the accident to the adjacent cabinet and ensure the mechanical strength of the bus.

C cable room:
Current transformer, grounding switch, lightning arrester and cable can be installed in the, and slotted detachable aluminum plate can be prepared at the bottom to ensure convenient construction on site.

D relay meter room:
The relay instrument room is used to install various relays, instruments, signal indicators, operating switches and other components. In addition, according to the user's requirements, a small bus room can be added at the top of the instrument room, and sixteen control small buses can be set.

Pressure relief device:
A pressure relief device is set above the handcart room, bus room and cable room. When an internal fault arc occurs in the circuit breaker or main bus and cable room, with the occurrence of the arc, the internal air pressure in the switchgear rises. After reaching a certain pressure, the pressure relief metal plate of the top device will be automatically opened to release pressure and exhaust gas, so as to ensure the safety of operators and switchgear

Latch structure:
The connection between the middle door and the cabinet body adopts the latch structure and is equipped with a lifting mechanism, which makes it more convenient to open the middle door. When the middle door is closed, the connection strength between the middle door and the cabinet body is better, which enhances the ability to effectively resist the internal arcing fault.