SF6 Vacuum Circuit Breaker Switch

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The SF6 vacuum circuit breaker switch is a critical protective device in modern electrical systems, combining the advantages of SF6 gas insulation and vacuum arc-quenching technology to provide high-efficiency, reliable fault protection for high-voltage power grids. This circuit breaker features excellent arc-extinguishing capabilities in high-voltage environments, enabling it to quickly and accurately interrupt fault currents, ensuring the safe operation of electrical equipment. The SF6 vacuum circuit breaker switch is widely used in power plants, substations, industrial power systems, and urban distribution networks, making it an essential component in the electrical power system.

By utilizing SF6 gas as an insulating medium and vacuum arc-quenching technology, the SF6 vacuum circuit breaker achieves low energy losses and efficient fault clearing capabilities, allowing for a rapid response to various faults and reducing system downtime and damage.

product details

PRODUCT PARAMETERS

NO	ITEM	UNIT	PARAMETERS	REMARKS
1	Rated Frequency	kV	24
2	Rated Current	A	630
3	Rated Breaking Current/Time to Thermal Stability	kA/s	20/4
4	Rated Peak Withstand Current	kA	50/63
5	Rated Short-Circuit Making Current	kA	50/63
6	Short-Circuit Making Times	次	30
7	Power Frequency Withstand Voltage: Phase-to-Ground Phase-to-Phase	kV	65
8	Power Frequency Withstand Voltage: Open Contact	kV	79
9	Lightning Impulse Withstand Voltage: Phase-to-Ground Phase-to-Phase	kV	125
10	Lightning Impulse Withstand Voltage: Open Contact	kV	145
11	Main Circuit Resistance	μΩ	≤60
12	Arc Extinguishing Chamber Mechanical Life	TIME	10000
13	Isolation/Grounding Switch Mechanical Life	TIME	5000

Structure and characteristics

Combination of SF6 Gas and Vacuum Arc Quenching

SF6 gas provides excellent insulation properties, effectively reducing the risk of arcing. Combined with vacuum arc-quenching technology, the SF6 vacuum circuit breaker can quickly interrupt fault currents, reducing the damage to electrical equipment and minimizing recovery time after a fault.

Fast Fault Clearing Capability

The SF6 vacuum circuit breaker switch adopts advanced vacuum arc-quenching technology, which can extinguish the arc in an extremely short time. This ensures that fault currents are quickly interrupted, minimizing equipment damage and improving system recovery speed.

High Short-Circuit Interrupting Capacity:

The SF6 vacuum circuit breaker is designed with a strong short-circuit interruption capability, able to withstand and rapidly interrupt high fault currents. It is suitable for various high-voltage power systems, ensuring the stability and reliability of the grid.

Compact Design and High Reliability

The compact design of the SF6 vacuum circuit breaker makes it suitable for installation in confined spaces, meeting a wide range of installation requirements. The equipment is manufactured using high-quality materials and advanced technologies, ensuring long-term stable operation with high reliability.

Low Maintenance and Long Lifespan:

With vacuum arc-quenching and SF6 gas insulation technologies, the circuit breaker experiences minimal wear on mechanical parts, resulting in lower maintenance needs. Compared to traditional oil and gas circuit breakers, the SF6 vacuum circuit breaker has a longer mechanical life, typically capable of performing 10,000 or more operations, significantly reducing maintenance costs.

Environmental Considerations

The SF6 vacuum circuit breaker meets environmental standards, as SF6 gas can be recycled, reducing its impact on the environment. Additionally, the vacuum arc-quenching technology does not produce harmful gases or pollutants, making it more environmentally friendly and aligning with modern power equipment's sustainability goals.

Electrical Parameters

Rated Voltage: Available in multiple voltage ratings (typically 72.5kV to 1100kV) to meet the needs of different power systems.

Rated Current: Various current ratings available to accommodate different load requirements.

Short-Circuit Breaking Capacity: Capable of interrupting large fault currents, typically up to 80kA or higher.

Mechanical Life: Designed for a mechanical life of 10,000 to 30,000 operations.

Switching Time: Extremely fast switching time, typically controlled within 50 to 100 milliseconds, ensuring rapid fault interruption.

Gas Pressure: The gas pressure inside the equipment is precisely monitored to ensure effective insulation under normal operating conditions.

Product Advantages

Efficient and Fast Fault Clearing: By combining SF6 gas insulation and vacuum arc-quenching technology, the circuit breaker quickly clears fault currents, ensuring rapid system recovery.

High Reliability and Long Lifespan: Durable and able to withstand high loads, with a long mechanical life that reduces the need for frequent maintenance and replacement, thus lowering overall operating costs.

Compact Design and Space-Saving: The compact design makes it suitable for installation in spaces with limited room, ensuring high efficiency even in constrained environments.

Environmental Benefits: Vacuum arc-quenching and gas recovery systems comply with environmental regulations, reducing pollution and supporting green energy development.

Low Maintenance Costs: With advanced technologies, the SF6 vacuum circuit breaker requires minimal maintenance, suitable for long-term operation and reducing the frequency and cost of maintenance.