Key points of low pressure draw-off switchgear

The main role of switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The main parts of the switchgear are circuit breaker, disconnecting switch, load switch, operating mechanism, mutual inductor and various protection devices.

There are many classification methods of switchgear, such as it can be divided into moving switchgear and fixed switchgear according to the installation of the circuit breaker; Or according to the different structure of the cabinet, the switchgear can be divided into open switch cabinet, metal closed switch cabinet, and metal closed armoured switch cabinet; According to the different voltage levels, it can be divided into high voltage switchgear, medium voltage switchgear and low voltage lv switchgear, etc. From the perspective of structure, low-voltage industrial switchgear can be divided into fixed type and withdrawable type.

The fixed type low-voltage switchgear can satisfy the electrical components to be reliably fixed in the right position of the switchgear. The switchgear shape is generally a cube. The withdrawable lv switchgear is composed of fixed cabinet body and removable device equipped with switch and other main electrical components.

Here we focus on the knowledge of low voltage withdrawable switchboard switchgear.

The movable part of the low pressure drawout switchboard should be portable when it is moved, and the positioning should be reliable after moving in. And the same type and specifications of the drawer can interchange. The processing method of the cabinet part in withdrawable switchgear is basically similar to that of the cabinet in the fixed switchgear. But as a result of the interchange requirement, the precision of the cabinet must be improved, and the structure should have enough adjustment. As for the movable device part, it should not only be able to be shifted, but also be reliably loaded with the main components, so it should have higher mechanical strength and higher precision, and the relevant part should have enough adjustment.