Circuit Breakers

219-3-1REC5-38284-25 Circuit Breakers - also known as electrical switches - are used to protect a circuit from an overload or short-circuit. They prevent an electro-mechanical device from getting damaged due to excessive current or voltage, by cutting off the power supply to the device when an overload or short-circuit is detected.

Applications

Circuit Breakers are used in a variety of applications in both residential and commercial settings. In residential applications, they are typically used to protect lighting and appliances from overload or short-circuit conditions. In commercial or industrial applications, they are regularly used to protect larger electrical systems, such as entire buildings or factories. They are also used to protect sensitive electronic equipment such as telephone exchanges, hospitals and laboratories.

Working Principle

The working principle of Circuit Breakers is based on the principle of thermal inertia. A thermal inertia circuit breaker contains a heat sensitive element (known as a bimetal strip) which is designed to expand when it is heated by current. When the bimetal strip is heated beyond its set temperature, it bends and trips the circuit breaker.

Another type of Circuit Breaker is an electromechanical device which works on the principle of magnetic hysteresis. This type of breaker contains a magnetic field which reacts to current and triggers a pole switch when an overload or short-circuit is detected. The pole switch then cuts off the electrical supply to the device.

Advantages

Circuit Breakers have many advantages over traditional fuses. They are able to withstand higher levels of current without needing to be replaced, making them more reliable and cost-effective. They are also easy to install and offer a reset feature, meaning that if the overload is caused by a temporary spike of power, the circuit breaker can be reset and the circuit will resume functioning.

Conclusion

In summary, Circuit Breakers are an essential part of any electrical system and can provide important protection against damage caused by overload and short-circuits. With their wide range of applications, ease of installation and reset feature, they are a cost-effective and reliable solution for any electrical system.