A power supply system is a system that is composed of a power supply system and a transmission and distribution system that generates electrical energy and supplies and delivers it to the electrical equipment. The power supply system can be roughly divided into three types: TN, IT, and TT. The TN system is divided into three manifestations: TN-C, TN-S, and TN-C-S.

Common wiring methods for power supply systems:

(1) The power supply system can be divided into radial, trunk, ring and power supply type wiring systems according to the system wiring arrangement;

(2) According to the operation mode, it can be divided into open and closed wiring systems;

(3) According to the requirements of the reliability of the load power supply, it can be divided into no standby and spare wiring system. In a redundant wiring system, when one of the lines fails, the remaining lines can ensure that all the power supply becomes a complete backup system; if only the power supply to important users is guaranteed, it becomes an incomplete backup system. The input mode of the backup system can be divided into manual input, automatic input and regular input.

    Cold-pressed terminals are used in a wide range of applications in power supply systems. They are primarily used to identify combinations of these devices and are also suitable for the identification of specific wire ends. The cold-pressed terminal has the advantages of signal loss at the control end, high switching frequency, no mechanical contact jitter, no wear switching, high insulation voltage, no fear of vibration, no position influence and long life, so it is required in the power supply system. Large amount.