LW30-72.5 SF6 Circuit Breaker

Item:LW30-72.5 SF6 Circuit Breaker

TheLW30-72.5 SF6 Circuit Breaker features aself-energy arc extinguishing chamber. Each pole of the circuit breaker has asingle-column, single-fracture structure, and together, the three poles are assembled onto a single frame. These poles are mechanically linked and operated by aspring mechanism.

Key components include:

· Thearc interrupter porcelain sleeve at the top.

· Thepillar porcelain sleeve and frame in the middle.

· Themechanism box is centrally located at the bottom of the frame, containing thespring operating mechanism and electrical control parts.

· Theoutput rod of the mechanism connects to thecrank arm.

· ASF6 gas density controller is mounted at the front of the frame.

· The frame is supported at both ends bypillars.

Model Description

Main Technical Parameters

Structure And Mounting Dimensions

Working Environment：

Item:LW30-72.5 SF6 Circuit Breaker

The LW30-72.5 SF6 Circuit Breaker is designed to operate reliably in the following environmental conditions:

Ambient Temperature:

1. Maximum: +40°C

2. Minimum: -30°C

Altitude:

1. ≤ 2000 meters above sea level

2. For installations above this altitude, adjustments to the rated insulation level are required.

Humidity Conditions:

1. Daily average relative humidity: ≤ 95%

2. Monthly average relative humidity: ≤ 90%

Seismic Resistance:

1. Can withstand earthquakes with a maximum intensity of 8 degrees.

Wind Pressure:

1. Maximum wind speed: 34 m/s (equivalent to 700 Pa).

Pollution Level:

1. Suitable for installation in areas with a contamination level of Class III or below.

Other Requirements:

1. Free from flammable, explosive, or corrosive gases in the surrounding air.

2. Installation site should not be prone to frequent and severe vibrations.

Possible causes of electrical circuit failure

Item:LW30-72.5 SF6 Circuit Breaker

SF6 Gas Depletion:

1. Loss of SF6 gas due to leaks or insufficient refilling can lead to poor arc extinguishing and insulation performance.

Arc Interruption Failure:

1. Insufficient arc extinguishing due to a malfunctioning interrupter or improper operation of the arc-quenching system.

Mechanical Linkage Failure:

1. Mechanical failure in the spring mechanism or linkage components can prevent proper opening/closing operation.

Contamination or Corrosion:

1. Presence of moisture or contaminants in the SF6 gas or on internal components can degrade performance and insulation properties.

Product Real Shot

FAQ

Item:LW30-72.5 SF6 Circuit Breaker

·  Q: What is the rated voltage of the LW30-72.5 SF6 Circuit Breaker?
A: The rated voltage is 72.5 kV.

·  ·  Q: What is the primary application of the LW30-72.5 SF6 Circuit Breaker?
A: It is mainly used for protecting transmission and distribution lines in electrical networks, and can also be used for capacitor switching.

·  ·  Q: What type of interrupting medium does the LW30-72.5 SF6 Circuit Breaker use?
A: It uses SF6 (sulfur hexafluoride) gas as the interrupting and insulating medium.

·  ·  Q: How does the LW30-72.5 SF6 Circuit Breaker extinguish arcs?
A: It utilizes the self-energy arc extinguishing principle, where the SF6 gas rapidly cools the arc and recovers the dielectric strength after interruption.