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Circuit Breakers

A circuit breaker is a protective device used to prevent damage to electrical circuits from overvoltage surges and short circuits. It is typically used in the form of a short switch, mounted in a circuit box. There are different types of circuit breakers available in the market, each specifically designed for a particular application.

Applications of Circuit Breakers

Circuit breakers are primarily used in industrial, residential, and commercial applications. In industrial applications, they are used to protect incoming power and control motors, switches and other high-power equipment. In residential applications, they are usually used to protect sensitive electronic equipment, including computers, televisions and audio equipment. In commercial applications, they are usually used to protect both incoming power and other electrical systems, such as lighting and ventilation systems.

Working Principle of Circuit Breakers

A circuit breaker operates by monitoring the amount of current flowing through the circuit. When the amount of current increases beyond a predetermined or adjustable set-point, the circuit breaker will trip and disconnect the circuit from the power source. This prevents further damage from occurring.

Circuit breakers are typically divided into two groups, mechanical and thermal. Mechanical circuit breakers use a mechanical switch to trip the circuit when the current exceeds the pre-set threshold. Thermal circuit breakers use a metal element that heats up when the current passes through it. When the metal element heats up past a certain temperature, it triggers a switch that trips the circuit.

Circuit breakers are typically found in electrical panels or as stand-alone units in residential or commercial applications. They can be either manually reset by turning off the power switch or by pressing reset buttons on the side of the circuit breaker. Circuit breakers are essential for the safety and protection of both electrical systems and personnel from injury or fire.

Conclusion

Circuit breakers are important for protecting both electrical systems and personnel from damage or fire. Circuit breakers use either mechanical or thermal methods to detect and trip over-currents, and they can be manual or automatically reset. They come in different shapes and sizes, designed to fit a variety of applications, so it is important to choose the right type of breaker for the application.

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