(1) Breaking components: breaking, closing and closing circuits and safe isolated power supplies; including conductive loops, dynamic and static contacts, and arc extinguishing devices.
(2) Insulation support elements: support the body of the switch, bear the operating force of the breaking element and various external forces, and ensure the insulation of the breaking element to the ground; including porcelain pillars, porcelain bushings and insulating tubes.
(3) Transmission components: transmit operating commands and operating kinetic energy to the moving contacts. Including connecting rods, crank arms, gears, hydraulic or pneumatic pipes.
(4) Base: used to support and fix the switch.
(5) Operating mechanism: used to provide energy to operate the switch to open and close. There are electromagnetic, hydraulic, spring, pneumatic and so on.
Detailed explanation of the main components of high-voltage circuit breakersHigh-voltage circuit breakers can be divided into four major components: conductive part, arc extinguishing part, insulating part, and operating part.
(1) Conductive part
It mainly includes dynamic and static arc contacts, main contacts or intermediate contacts, and various forms of transition connections. Its role is to pass operating current and short-circuit current.
(2) Insulation part
Mainly include insulating medium such as oil, vacuum or SF6 gas, porcelain sleeve, insulating rod, etc. Its function is to ensure a good insulation state between the conductive part and the ground, between different phases, and between the same phase fractures.
(3) Arc extinguishing part
It mainly includes dynamic and static arc contacts, nozzles and pressure cylinders. Its function is to improve the arc extinguishing ability and shorten the arcing time. It is necessary to ensure reliable breaking of large short-circuit currents, and to ensure that the breaking of small inductive currents does not cut off, or the overvoltage generated does not exceed the allowable value; breaking small capacitive currents does not reignite.
(4) Operating part
Mainly refers to various types of operating mechanisms and transmission mechanisms. Its function is to realize the prescribed operating procedures for the circuit breaker and to keep the circuit breaker in the corresponding opening and closing positions.
Physical outline drawing of high voltage circuit breaker
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