Views: 0 Author: Site Editor Publish Time: 2022-01-12 Origin: Site
The Vacuum Circuit Breaker is an internal power distribution device in a 3~10kV, 50Hz three-phase AC system. It can be used for the protection and control of electrical equipment in industrial and mining companies, power plants and power stations. For maintenance and frequent use, power switches can be configured in medium cabinets, double layer cabinets and fixed cabinets to control and protect high voltage electrical equipment.
What are the properties of Vacuum Circuit Breakers?
What is the functional principle of a Vacuum Circuit Breaker?
What is the use method of Vacuum Circuit Breaker?
The contact distance is small, the contact distance of the 10KV Vacuum Circuit Breaker is only about 10 mm, the drive operating power is low, the mechanical part lift is small and the mechanical life is long.
The arc time is short and has nothing to do with the switching current, generally only half the cycle.
After extinguishing the arc, the recovery speed of the contact column medium is fast and the output of the short-circuit error is better.
Vacuum Circuit Breakers have a long electrical life due to the low wear and tear of the contacts when the power is switched off, with up to 30-50-fold interruption of the full capacity, up to 5000-fold nominal current interruption, low noise, suitable for frequent operation.
The Vacuum Circuit Breaker is small and light.
Suitable for interrupting capacitive load flows.
The functional principle of the Vacuum Circuit Breaker is: When the movable and static contacts are opened by the drive, a light arc is created between the contacts and the contact surface evaporates with high temperature. Because the contact is designed with a special shape, a magnetic field is created when the current flows through. Under the effect of this magnetic field, the arc moves rapidly along the tangential direction of the contact surface. Part of the metal vapour condenses on the metal cylinder (shield cover). The strength of the medium recovered quickly.
When the Vacuum Circuit Breaker is in the closed position, its ground insulation is borne by the supporting insulator. Once the circuit connected to the Vacuum Circuit Breaker has a permanent ground fault, after the circuit breaker trips, the ground fault point has not been cleared, and there is an electrical bus. Ground insulation must also be borne by the vacuum gap of the breaker of the circuit breaker; when various faults are opened, the vacuum insulation gap between a pair of contacts of the fracture must withstand various recovery voltages without breakdown.
Therefore, the insulation characteristics of the vacuum gap have become the main research topic for increasing the breaking voltage of the arc extinguishing chamber and making the single-break Vacuum Circuit Breaker develop to a high voltage level. The expression of vacuum degree A space where the absolute pressure of gas is less than one atmosphere is called a vacuum space. The higher the vacuum degree, the lower the gas pressure in the space.
Zhejiang Zhegui Electric Co., Ltd strives to offer high quality Vacuum Circuit Breaker at reasonable prices, efficient production times and the most professional customer service.