8340-F110-K4M1-A2H0-50A

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Circuit Breakers

Circuit breakers are protective devices that shut off or inhibit the passage of electrical current when an undesirable or potentially harmful state arises, and they are vital components in any power distribution system. They are utilized in almost every application where electricity is used, from small household devices to large industrial installations, and the particular breaker being used depends on the application, as each breaker has unique specifications.

8340-F110-K4M1-A2H0-50A

The particular breaker being discussed is the type 8340-F110-K4M1-A2H0-50A, a circuit breaker with electrical ratings of 500VAC, 50A. It is designed mainly for the high rated currents of motor applications, such as induction motors and built motors. It is also well suited for transformer applications, as it features an adjustable differential current setting, and it has the ability to trip current up to 6 times its rated current.

Application Field

This type of circuit breaker is suitable for motor protection that is frequently switched or exceeded rated current situations such as rated current on induction motors frequently. It is also especially useful in low impedance transformer applications, as the high trip performance of the breaker means it can trip even higher than rated current. It can additionally be used in other applications such as electric heating and electronic protection.

Working Principle

The circuit breaker works by using a thermally operated bimetal strip that is arranged in series with the circuit it is protecting. When the current passing through the bimetal strip begins to exceed its rated value, it will heat up. As it is heated, the bimetal strip will bend, thereby causing mechanical contact to be made and interrupting the flow of electricity. The extent of the current overload before the trip is known as the "trip current," and it is adjustable, allowing the user to select the current value that the circuit will trip on.

Conclusion

The 8340-F110-K4M1-A2H0-50A circuit breaker is an ideal device for motor protection and transformer applications. It has a high trip performance, allowing it to trip on higher than rated currents, and it is adjustable, making it possible to select the exact current level that the breaker will trip on. Its simple yet effective design makes it a reliable and necessary part of any power distribution system.

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