90kv 110kv Sf6 Circuit Breaker

The 90kv 110kv Sf6 Circuit Breaker is a new generation of self-energy high-voltage circuit breakers. This product is designed for:

Applications:

● Closing and interrupting load currents and short-circuit fault currents.

● Controlling and protecting power equipment and tie lines in AC 50Hz, 126kV power systems.

Altitude Capability:

● Suitable for use in areas below 2500 meters above sea level.

Insulation and Arc Extinction:

● Utilizes SF6 gas as both the insulation and arc-extinguishing medium. In alpine regions, a mixture of SF6 and CF4 is used.

Operation Mechanism:

● Features a self-energy arc-extinguishing principle and is equipped with a spring operating mechanism.

Main Technical Parameters

Structure And Mounting Dimensions

Working Environment：

Item: LW9-72.5 Sulfur hexafluoride circuit breaker Installation and Operating Conditions

Altitude:

● Suitable for installation in areas below 2500 meters above sea level. If used at higher altitudes, adjustments to the rated insulation level may be required.

Ambient Temperature:

●  Designed to operate within a specified temperature range. Typically, the upper limit is +40°C, and the lower limit is -30°C.

Humidity:

● The circuit breaker should be installed in environments with low humidity to prevent moisture ingress, which can affect the insulation properties of SF6 gas.

Wind Pressure:

● Must withstand wind pressures up to 700 Pa (equivalent to wind speeds of 34 m/s).

Seismic Resistance:

● Capable of withstanding earthquake intensities of up to 8 degrees.

Contamination Level:

● Designed for use in environments classified as Class I contamination levels, ensuring reliable operation in less polluted areas.

Possible causes of electrical circuit failure

Insulation Breakdown:

Deterioration of insulation due to moisture ingress or contaminants can lead to short circuits or arcing.

SF6 Gas Leakage:

Loss of SF6 gas can reduce insulation effectiveness and increase the risk of electrical failure.

Mechanical Failure:

Malfunctions in the spring operating mechanism or other mechanical components can prevent the circuit breaker from operating properly.

Electrical Component Failure:

Failure of control relays, contacts, or circuit protection devices can lead to circuit disruptions.

Overloading:

Continuous operation above the rated current can cause overheating and damage to the circuit breaker.

Short-Circuit Events:

Sudden short circuits can create excessive currents that may exceed the breaking capacity of the circuit breaker.

Environmental Factors:

Extreme temperatures, high humidity, or contamination can adversely affect the circuit breaker's performance and reliability.

Improper Installation or Maintenance:

Incorrect installation practices or inadequate maintenance can lead to operational failures.

Product Real Shot

FAQ

Q1: What is the main purpose of the 90kV and 110kV SF6 Circuit Breaker?

A1: The circuit breaker is designed for closing and interrupting load currents and short-circuit fault currents in power systems, providing control and protection for power equipment.

Q2: What type of gas is used in the circuit breaker?

A2: The circuit breaker uses sulfur hexafluoride (SF6) gas as an insulating and arc-extinguishing medium. In alpine regions, a mixture of SF6 and CF4 may be used.

Q3: What are the operating conditions for this circuit breaker?

A3: It operates effectively at altitudes below 2500 meters, with ambient temperatures ranging from -30°C to +40°C.