LW30-252 Sf6 Breaker

Item:LW30-252 Sf6 Breaker

The LW30-252 SF6 Circuit Breaker (230kV) has several advanced features, making it highly reliable and efficient:

● Advanced Interrupting Principle: Ensures excellent performance in interrupting currents and coping with electrical phenomena.

● Fast Recovery of Dielectric Strength: Quickly restores dielectric strength after interrupting, minimizing the risk of re-breakdown or re-ignition.

● Short Burning Time: Fast arc extinction reduces the time during which the contacts are exposed to high currents, improving durability.

● Long Electrical Life: Designed for extended operational use with minimal wear and tear.

Key Features:

● SF6 Gas as Insulation and Interrupting Medium: SF6 gas is used to provide both insulation and arc-extinguishing, with no risk of combustion or explosion, making it safe for use in densely populated areas.

● Single-Break Structure: Features a simple design with fewer parts, enhancing reliability.

● Spring-Operated Mechanism: Uses a full spring mechanism, which makes the structure compact, simple, and easy to maintain.

● High Reliability and Low Maintenance: The circuit breaker is designed for minimal maintenance while maintaining high operational reliability.

Model Description

Main Technical Parameters

Structure And Mounting Dimensions

Working Environment：

Item:LW30-252 Sf6 Breaker

● Installation Method: Side-mounted or middle-mounted.

● Ambient Air Temperature:

● Upper limit: +40°C

● Lower limit: -30°C

● Altitude: Up to 2000 meters. For higher altitudes, the rated insulation level should be increased accordingly.

● Wind Pressure: Maximum of 700 Pa (equivalent to wind speed of 34 m/s).

● Seismic Intensity: Can withstand earthquake intensity up to 8 degrees.

● Contamination Level: Class I (light pollution level).

● Maximum Daily Temperature Difference: No more than 25°C.

Possible causes of electrical circuit failure

● SF6 Gas Contamination:
The presence of impurities or moisture in the SF6 gas can degrade its insulating and arc-extinguishing properties, leading to circuit failure.

● Insulation Breakdown:
If the insulation materials (such as seals, gaskets, or bushings) deteriorate, it can cause short circuits or leakage, compromising the breaker’s performance.

● Mechanical Failures:
Wear or malfunction of mechanical components, such as the spring-operated mechanism, contacts, or operating mechanisms, can prevent proper opening/closing actions and lead to failure.

● Arc Flash or Re-Ignition:
If the circuit breaker does not fully extinguish the arc or experiences a re-ignition, it can cause further damage to internal components and lead to operational failure.

Product Real Shot

FAQ

A1：What is the LW30-252 SF6 Circuit Breaker?
Q1：The LW30-252 SF6 Circuit Breaker is a high-voltage, SF6 gas-insulated circuit breaker designed for 230kV applications. It uses sulfur hexafluoride (SF6) gas as both the insulation and arc-extinguishing medium.

A2：What applications is the LW30-252 SF6 Circuit Breaker used for?
Q2：It is used for switching and protecting high-voltage transmission and distribution lines, managing both load currents and short-circuit fault currents.

A3：What is the operating temperature range?
Q3：The circuit breaker typically operates within a temperature range of -30°C to +40°C, with specific adjustments needed for extreme conditions.

A4：What is the maximum altitude for operation?
Q4：The LW30-252 SF6 Circuit Breaker is suitable for installation up to 2000 meters above sea level. For higher altitudes, the insulation level should be increased accordingly.