How to distinguish vacuum interrupter and vacuum circuit breaker?
1. Definition and composition relationship：The difference between it and other ordinary switches is that it can cut off the nominal rated short-circuit current.
There are many types of vacuum interrupter, air, sulfur hexafluoride, carbon dioxide, vacuum..., and the vacuum interrupter using vacuum technology is a vacuum interrupter.
2. Function and role
vacuum interrupter:It suppresses arc reignition through a high vacuum environment to ensure safe circuit disconnection.
Vacuum circuit breaker: Comprehensive functions include circuit connection and disconnection, short-circuit protection, overload protection, etc., relying on vacuum arc chambers to achieve the core arc extinguishing function.
3. Structural differences
Each vacuum interrupter of the vacuum circuit breaker is an integral part that cannot be disassembled, and the dynamic and static energy can be welded on the dynamic and static conductive rods respectively. The static conductive rod is welded on the flange, and a bellows is welded on the dynamic conductive rod, which runs in the guide sleeve. The bellows and the guide sleeve are welded on the lower flange, When the switch is closed or opened, the dynamic conductive rod moves up and down, and the bellows is compressed or stretched, so that the vacuum degree of the vacuum interrupter is maintained.
In a vacuum, since the average free path of gas molecules is large, it is not easy for gas to be free, and the insulation strength of the vacuum is much higher than that of the atmosphere. Under the action of this magnetic field force, the arc moves rapidly along the tangent direction of the contact surface, and part of the metal vapor condenses on the metal cylinder (i.e., the shielding cover).
Vacuum circuit breaker: The structure is more complex, including operating mechanisms (such as springs or permanent magnet mechanisms), arc extinguishing chambers, insulating shells, etc., and it is necessary to take into account both mechanical operation and vacuum environment maintenance.
4.Application scope:vacuum interrupter are mainly used in industrial high-frequency heating and other distribution systems.It has the characteristics of energy saving, material saving, fire prevention, explosion prevention, small size.
Vacuum circuit breakers can withstand voltages of 10kV and above, and are suitable for scenarios such as substations and power plants.
12kV vacuum interrupter for vacuum circuit breaker by is a critical component of high voltage power switches in 12kV systems. Its primary function is to utilize the excellent insulating properties of the vacuum within the tube to quickly extinguish the arc and suppress the current once the medium to high voltage circuit is interrupted. This process helps prevent accidents and unexpected incidents. The vacuum interrupter is mainly used in power transmission and distribution control systems.
It has many advantages :
1.Strong Arc Extinguishing Capability
In a vacuum environment, the arc is easily extinguished, enabling fast and effective circuit interruption with a high breaking capacity.
2.High Insulation Level
Vacuum offers excellent insulating properties, capable of withstanding high voltages, ensuring the safe operation of the circuit.
3.Long Life
The internal structure is simple, free from oxidation problems that could affect the contacts, resulting in long mechanical and electrical life.
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