72.5kv SF6 Circuit Breaker

The Sulfur Hexafluoride (SF6) Circuit Breaker is used for:

● Switching Rated Current: Managing the normal operating current.

● Fault Current Switching: Interrupting short-circuit fault currents for protection.

● Switching Power Lines: Control and management of power transmission and transformation systems.

Key Features:

● Protection and Control: Ensures reliable protection, control, and operation of power transmission and transformation systems.

● Three-Pole Operation: Designed for simultaneous opening and closing of all three poles.

● Fast Automatic Reclosing: Capable of quick automatic reclosing for rapid recovery after faults.

Model Description

Main Technical Parameters

Working Environment：

Item:72.5kv SF6 Circuit Breaker

Installation Conditions:

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

● Ambient Air Temperature:

◎ Upper limit: +40°C

◎ Lower limit: -30°C

● Altitude: Up to 2000 meters. If installation is at a higher altitude, the rated insulation level should be adjusted accordingly.

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

● Earthquake Resistance: Can withstand seismic activity with an intensity of up to 8 degrees.

● Contamination Level: Class I.

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

Possible causes of electrical circuit failure

Item:72.5 SF6 Circuit Breaker

● SF6 Gas Contamination:
Impurities or moisture entering the SF6 gas can reduce its insulating and arc-extinguishing properties, potentially causing failures.

● Insulation Breakdown:
Deterioration of the insulation materials (such as seals or gaskets) can lead to short circuits or partial discharge, which can disrupt the breaker’s operation.

● Mechanical Failure:
Wear or damage to mechanical components such as operating mechanisms, contacts, or springs can prevent proper functioning, leading to failure.

● Overloading:
If the circuit breaker is exposed to currents above its rated capacity, it can overheat and fail, damaging internal components.

Product Real Shot

FAQ

A1:What is a 72.5 kV SF6 Circuit Breaker?
Q1A:72.5 kV SF6 Circuit Breaker is a high-voltage electrical switchgear that uses sulfur hexafluoride (SF6) gas as the insulating and arc-extinguishing medium. It is designed to protect power transmission systems by interrupting the flow of current during faults.

A2:What applications is the 72.5 kV SF6 Circuit Breaker used for?
Q2:It is used in power distribution systems to switch normal load currents, interrupt short-circuit fault currents, and protect equipment and transmission lines in AC 50 Hz systems.

A3:What are the key features of the 72.5 kV SF6 Circuit Breaker?

Q3:High-Performance Arc Extinguishing: SF6 gas ensures effective arc extinguishing.

Compact and Reliable: Efficient design with minimal maintenance requirements.

Long Service Life: Designed for a long operational life with reduced wear and tear.

A4:What is the operating temperature range?
Q4:The breaker typically operates within a temperature range of -30°C to +40°C, with performance adjustments required for extreme temperatures.