Circuit breakers are vital equipment in power systems to protect circuits from faults such as overloads and short circuits. This article will introduce the basic knowledge of circuit breaker in depth, including its working principle, type, application field and maintenance, etc., to help readers understand this key equipment more comprehensively.

1. The working principle of the circuit breaker

circuit breakers protect the circuit mainly by disconnecting or connecting the circuit. When a fault such as overload or short circuit occurs in the circuit, the circuit breaker will automatically trip, cut off the circuit, prevent the fault from spreading to the circuit, and protect the circuit and equipment. Circuit breakers can be divided into two types of thermal overload protection and short circuit protection. Choose the appropriate type of circuit breaker according to different protection requirements.

2. Common types of circuit breakers

(1) Air switch circuit breaker: Air switch circuit breaker is the most common type of circuit breaker. It protects the circuit through air medium and is suitable for overload and short circuit protection in low-voltage circuits.

(2) Load switch circuit breaker: Load switch circuit breaker is used to control and protect load equipment and motors. It has overload and short circuit protection functions and is often used in industrial fields.

(3) Leakage circuit breaker: Leakage circuit breaker is a circuit breaker specially used to protect personal safety. It can detect leakage in the circuit and quickly cut off the circuit when leakage occurs.

(4) Isolating switch circuit breaker: Isolating switch circuit breaker is used to break and isolate circuits, usually used to repair and overhaul electrical equipment.

3. Application field of circuit breaker

circuit breakers are widely used in a variety of power systems and equipment, including:

• industrial field: used to protect industrial circuits and equipment to ensure the safe and stable operation of the power system.
• Residential and commercial buildings: Used to protect circuits and equipment in homes and commercial buildings from hazards such as fire caused by circuit failure.
• Transportation: Used in electric vehicles and railway systems to protect the safe operation of electric motors and power systems.

4. Maintenance of circuit breaker

to ensure circuit Breaker the normal operation and prolonging its service life require regular maintenance work, including:

• regularly check the wiring status of the circuit breaker and the fastening of the connector to ensure that the circuit is well connected.
• Clean the surface of the circuit breaker and the radiator to prevent dust and debris from affecting the heat dissipation effect of the circuit breaker.
• Regularly check whether the tripping action of the circuit breaker is normal to ensure that the protection function of the circuit breaker is normal.