is an important electrical component used to protect circuits and equipment. It can quickly cut off the current when overload, short circuit or other faults are detected in the circuit to prevent equipment damage or circuit fire. According to different application requirements and working principles, circuit breakers are divided into many different types. This article will summarize some common types of circuit breakers.

1. Air circuit breaker (Air Circuit Breaker, referred to as ACB): Air circuit breaker is a common type of circuit breaker. It uses air as a medium to cut and connect the circuit through a switch mechanism. Air circuit breakers have high power-off capacity, can withstand large currents and fault currents, and are suitable for the protection of medium and high voltage circuits. It is widely used in the power system of industrial and commercial buildings.

2. Magnetic circuit breaker: Magnetic circuit breaker is a circuit breaker that uses electromagnetic principle to work. Magnetic Circuit Breaker. It uses the magnetic force generated by current induction to determine whether the circuit is overloaded, and quickly cuts off the current when overloaded. Magnetic circuit breakers are suitable for the protection of low-voltage circuits and are widely used in circuit protection in homes and offices.

3. Heat conduction circuit breaker (Thermal Circuit Breaker): A heat conduction circuit breaker is a circuit breaker that works based on temperature changes. It uses thermally responsive elements, such as bimetals or thermistors, to detect overloads in the circuit. When the current exceeds the limit value and lasts for a period of time, the thermal circuit breaker will cut off the current through the expansion of the thermally responsive element. Thermal circuit breakers are widely used in the protection of low-power circuits such as electronic equipment and household appliances.

4. Oil immersed circuit breaker: Oil Circuit Breaker is a kind of high voltage circuit protection equipment. It uses insulating oil as a medium, which can effectively cut off the fault current in high-voltage circuits. Oil-immersed circuit breakers have high power-off and arc-extinguishing capabilities, and are suitable for substations and high-voltage power systems.

5. SF6 circuit breaker :SF6 circuit breaker is a circuit breaker that uses sulfide gas (SF6) as an arc extinguishing medium. It has excellent arc extinguishing performance and insulation performance, and can cut off the fault current in high-voltage circuits. SF6 circuit breakers are widely used in substations, transmission lines and industrial power systems.

In addition to the above-listed circuit breakers, there are many other types of circuit breakers, such as vacuum circuit breakers (vacuum Circuit Breaker), electronic circuit breakers (Electronic Circuit Breaker), etc. These circuit breaker types provide a variety of options based on different operating principles and application scenarios to meet various circuit protection needs.