Installation method and structure of low-voltage power distribution cabinet

Power distribution cabinets are divided into high-voltage power distribution cabinets and low-voltage power distribution cabinets. We call low-voltage power distribution cabinets low-voltage switch cabinets. This kind of power control device is generally used in industrial and mining, power stations and substations. Provide power conversion, distribution and control for power, lighting, power generation and power distribution equipment. Low-voltage power distribution cabinets use more than high-voltage power distribution cabinets in practical applications. Here is an explanation of low-voltage power distribution cabinets.

The name and function of the cabinet, the combination of low-voltage power distribution cabinets usually the leftmost cabinet is the incoming switch cabinet, the middle part is the reactive power compensation cabinet, and the rightmost is the feeder switch cabinet or the metering cabinet of various meters. Wait.

The main components in the control cabinet generally include isolation switches, various air circuit breakers, transformers, compensation capacitors, fuses, and various instruments and controllers. 

There are two ways to enter the line of low-voltage power distribution distribution. There are two ways to enter the switch cabinet. One is to enter from the top, which is called the top entry method. The top step feed method is generally to install the power supply through the bridge rack. Introduced into the switch cabinet. The other is to enter the cable from the bottom. The bottom cable entry method usually uses the bottom cable entry or the exposed ground cable entry. The ground cable entry is generally suitable for limited space, or the installation method is selected after the construction has been completed and the decoration is installed. Therefore, when purchasing a low-voltage power distribution cabinet, you need to choose a suitable low-voltage power distribution cabinet according to the actual situation on site, so as not to affect the installation process.

The main core component of the incoming line and the switchgear in the incoming switchgear is an air circuit breaker. This air circuit breaker is an energy-storage breaking method, which can break relatively large currents, and the maximum breaking current capacity can reach 6300A such a large current.

The installation method of the low-voltage power distribution cabinet: The wiring installation method of the low-voltage power distribution cabinet is to directly introduce the power supply into the switch cabinet, and then connect to the busbar in the switch cabinet body, and then connect and disconnect the power supply through the isolation switch. Open the control, and finally display the voltage value of the power input terminal through three transformers and measuring instruments. Since most of the loads in the capacitor compensation cabinet are inductive loads in actual production, in order to improve the power efficiency of the load, a capacitor compensation device is generally installed in the switch cabinet. In the capacitance compensation cabinet, it is mainly composed of compensation capacitors and capacitance contactors, as well as transformers, reactors and fuses. These are all at the back of the capacitor compensation cabinet, and the front part of the compensation cabinet is a drawer cabinet. These drawer cabinets adopt various modular structure methods, and each drawer has its own function.