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Circuit Breakers

A circuit breaker is an electrical safety device. It monitors the current in a circuit and when the current becomes too high, it will automatically shut off or disconnect the circuit. Circuit breakers are used in a variety of applications and are designed to protect devices and people from electrical hazards such as short circuits and overloads.

203-1-2-63-202-2-2 Application Field and Working Principle

Circuit breakers are commonly used to protect residential and commercial buildings from damaging electrical currents. In a home or office, a circuit breaker can be used to protect the various circuits in the building from overload or short circuit. When a circuit breaker detects an overload, it will disconnect the current and prevent it from reaching hazardous levels. Circuit breakers are also used in industrial applications such as factories and power plants.

The working principle of a circuit breaker is relatively simple. It contains a metal strip that is heated by the current flowing through it. When the current becomes too high, the metal strip will heat up and expand, pushing against a spring-loaded switch and disconnecting the current. The circuit breaker will remain off until the current is reduced to a safe level or until it is manually reset.

Circuit breakers are available in a variety of sizes and types, ranging from small residential circuit breakers to massive industrial circuit breakers. The type of circuit breaker used depends on the application, the type of current involved, and the amount of electrical protection required. Circuit breakers come with various features such as current sensing, adjustable trip levels, and ground fault protection.

Circuit breakers are an essential part of any electrical system and play an important role in protecting people and property from electrical hazards. By understanding the application field and working principle of circuit breakers, it is possible to select the right type of breaker for any given application.

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