The drawer cabinet under low voltage condition has a more convenient and suitable overall erection structure, and the beautiful layout makes the installation process more simple and convenient. Drawer-type low-voltage switchgear is popular in the market. The low-voltage draw-out switch cabinet has no knife switch, which reduces the space for component installation, increases the number of loops in the cabinet, and the drawers of the same specification can be interchanged, reducing the power outage time, and is widely used in low-voltage complete equipment. All kinds of performance have exceeded the fixed cabinet.
There are differences in internal functions and unit structures of MNS low-voltage drawer cabinets. Thermal energy will have a great impact on its power distribution performance. The excellent heat resistance performance of MNS low-voltage drawer cabinet shows its excellent stability properties. Under special circumstances, the unexpected failure of the arc will show the protection ability of the preset hardware for this situation. Therefore, the preset mechanism has these effects on the performance during design.
The switch cabinet body needs to meet the dual stability, thermal stability and dynamic stability. The dynamic and thermal stability of the cabinet is a problem considered by the manufacturer. In the case of large current, once there is a short circuit, the cabinet body should have the ability to withstand the short circuit current, and the structural strength of the cabinet body is very high. As the designer of the low-voltage cabinet, the fixed mode and position of the horizontal main busbar should be considered first.
For example, the overlap between the circuit breaker pile head and the copper busbar (the busbar is treated with silver plating), pay attention to the pressure of the fastening bolts at the connection part, and measure whether the conductivity of the conductor material meets the requirements, but the contact area is too small, which makes the contact resistance too large and the temperature too high. Arc is a kind of gas free discharge phenomenon, and also a kind of plasma.
In addition, the temperature rise of the drawer switchgear is also an important index for examining the structural design of the cabinet. The temperature rise in the cabinet is related to the installation form of the shell, the size of the shell, whether there is a ventilation slot and the size of the ventilation slot, the number of internal horizontal partitions, the effective loss of components and the number of drawer units and other parameters. The ventilation of the functional unit is very important in the ventilation design of the draw-out cabinet.
It plays an important role in the construction of petroleum, chemical industry, metallurgy, construction, mining, etc. Due to the increased investment in infrastructure and power energy, the low-voltage draw-out switchgear industry has begun to have a large space for development. Come to our website if you have relevant requirements http://www.tongyuhengcheng.com Ask about it!