LW34-40.5 SF6 Circuit Breaker

Item:LW34-40.5 SF6 Circuit Breaker

TheLW34-40.5 SF6 Circuit Breaker offers:

· Excellent Breaking Performance: Utilizes a gas extinguishing chamber and arc extinguishing chamber for reliable operation.

· Long Electrical Life: No need to replace SF6 gas, ensuring lasting performance.

· High Mechanical Reliability: Can operate frequently with a mechanical life of over 3,000 operations.

· Current Transformer Options: Each unit can be equipped with 6-12 current transformers, depending on user needs.

· Temperature-Resistant Pressure Gauge: Pressure readings are stable and unaffected by temperature changes, making it easy to use.

Model Description

Main Technical Parameters

Structure And Mounting Dimensions

Working Environment：

Item:LW34-40.5 SF6 Circuit Breaker

Working Environment of LW34-40.5 SF6 Circuit Breaker:

Ambient Temperature Range:

o Min: -30°C

o Max: +40°C

o (For special conditions, can be customized for higher or lower temperature ranges.)

Altitude:

o Up to1,000 meters (For higher altitudes, special adjustments may be required.)

Humidity:

o The relative humidity should not exceed95% (non-condensing).

Pollution Level:

o Suitable formoderate pollution environments (up topollution degree III as per IEC standards).

Seismic Resistance:

o Designed to withstand earthquake intensity of up to8 degrees on the Richter scale.

These environmental specifications ensure that the LW34-40.5 SF6 Circuit Breaker performs reliably in a variety of operational conditions, making it suitable for most power distribution systems.

Possible causes of electrical circuit failure

Item:LW34-40.5 SF6 Circuit Breaker

Possible Causes of Electrical Circuit Failure:

Insufficient SF6 Gas Pressure:

Low SF6 gas pressure can reduce the breaker’s arc-extinguishing ability, leading to failure to interrupt faults properly. Regular pressure checks are necessary for reliable operation.

Contamination of SF6 Gas:

Contamination (e.g., moisture or particulate matter) in the SF6 gas can degrade its dielectric properties, impairing the breaker’s ability to extinguish arcs and causing malfunction.

Mechanical Failure:

Wear and tear of internal components likecontacts, springs, or the operating mechanism can cause failure in proper operation. For example, broken or misaligned components may prevent the breaker from opening or closing effectively.

Faulty Current Transformers (CTs):

If thebuilt-in current transformers fail or become damaged, it may lead to inaccurate fault detection, improper tripping, or protection failure, resulting in system damage. 

Product Real Shot

FAQ

Item:LW34-40.5 SF6 Circuit Breaker

1.What is the rated voltage of the LW34-40.5 SF6 Circuit Breaker?

· The LW34-40.5 SF6 Circuit Breaker is designed for arated voltage of40.5 kV, suitable for 35 kV power distribution systems.

2.What type of gas does the LW34-40.5 use for arc extinguishing?

· The breaker usesSF6 (Sulfur Hexafluoride) gas, known for its excellent arc-extinguishing and insulating properties.

3.What is the mechanical life of the LW34-40.5 SF6 Circuit Breaker?

· Themechanical life of the LW34-40.5 SF6 Circuit Breaker isover 3,000 operations, allowing for frequent use without significant wear.

4.What is the electrical life of the LW34-40.5 SF6 Circuit Breaker?

· The electrical life of the LW34-40.5 is extended, as it does not require replacement of the SF6 gas during its service life, provided regular maintenance is performed.