Basic knowledge of switchgear partial discharge tester

1. Switchgear (also known as complete set of switches or complete set of distribution equipment): It is an electrical equipment mainly composed of circuit breakers. It refers to the manufacturer's assembly of relevant high and low voltage electrical appliances (including control appliances, protection appliances, measuring appliances), busbars, current carrying conductors, insulators, etc. in a closed or open metal cabinet according to the requirements of the electrical primary wiring diagram, as a device for receiving and distributing electrical energy in the power system

High voltage switchgear: a general term for high-voltage switches mainly used for power generation, transmission, distribution, and energy conversion, as well as control, measurement, protection devices, electrical connections (busbars), enclosures, supports, and other components

3. The "five protections" in the protection requirements for switchgear: prevent accidental opening and closing of circuit breakers, prevent live opening and closing of isolating switches, prevent live closing of grounding switches, prevent grounding opening and closing of circuit breakers, and prevent accidental entry into live compartments.

Corresponding relationship between the position and phase sequence of the 4 busbars

Installation of phase specific painted busbars in mutual positions

Vertical and horizontal down conductors

Phase A: Yellow, Upper, Far Left

B-phase Green Medium Medium Medium

C-phase red below near right

5. The protection level of the switchgear partial discharge tester includes the enclosure, partition, and other parts to prevent human access to live parts and moving parts, as well as to prevent external objects from entering the internal equipment.