What is a vacuum arc extinguishing chamber for outdoor vacuum circuit breakers?

The vacuum arc extinguishing chamber used in outdoor vacuum circuit breakers is the core component that can quickly cut off current and protect circuits, equivalent to the "heart" of the circuit breaker. It relies on a high vacuum environment to extinguish the arc, while using ceramic or glass shells to provide insulation, ensuring safe and reliable outdoor operation.

core function

Arc extinguishing: Quickly extinguishing the arc generated when the contact is disconnected in vacuum.

Insulation: Vacuum and ceramic/glass enclosures provide high insulation strength, isolating high-voltage components.

Structure and Characteristics

Structure: The sealed container contains dynamic/static contacts, corrugated tubes, and metal shielding tubes, which enhance the breaking capacity through magnetic field design.

Features: High reliability, maintenance free, long lifespan, adaptable to various climatic environments.

Application scenarios

Power system: used for the protection and control of 35kV and below distribution systems, such as 10kV and 12kV lines.

Industrial sector: Used for equipment protection and power supply in industries such as metallurgy, petrochemicals, and coal mining.

Selection Recommendation

Voltage level: Select according to the system voltage (such as 10kV, 12kV, 35kV).

Environmental adaptability: Consider outdoor use and choose models with strong weather resistance and high protection levels.

Breaking capacity: Select the appropriate rated breaking current based on the short-circuit current of the circuit.

Precautions

Installation: It needs to be installed vertically or horizontally to ensure sealing and mechanical stability.

Maintenance: Regularly check contact wear and vacuum level to ensure stable performance.