219-3-6391-002

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Circuit breakers have been employed successfully for various safety-critical applications, including protecting people, property, and equipment from harm due to electrical faults. This article focuses on the application field and working principle of the 219-3-6391-002 circuit breaker.

Classification of Circuit Breakers

Circuit breakers can be classified into three major categories: Thermal circuit breakers, Magnetic circuit breakers, and High-voltage circuit breakers. Thermal circuit breakers are the most frequently used type, and they operate by using a bimetallic strip or similar device that senses temperature increases in the circuit and trips when a dangerous temperature is reached. Magnetic circuit breakers are relatively inexpensive and they work using an electromagnet that is automatically a trip when electric current surpasses a specific value. The third type, High-voltage circuit breakers are mainly used in outdoor substations and electrical distribution networks. These circuit breakers employ oil or gas (SF6) to quench electric arcs that form due to electric fault.

Application Field of 219-3-6391-002 Circuit Breaker

The 219-3-6391-002 circuit breaker belongs to the magnetic circuit breaker category, which is mainly used in residential and commercial buildings for overload and short-circuit protection. This type of circuit breaker is better suited for use with small loads since its maximum current rating is only 30A. Yet, it can still be used in indoor commercial buildings or larger commercial facilities where multiple circuit breakers must be utilized for more reliable performance.

Working Principle of 219-3-6391-002 Circuit Breaker

As mentioned, the 219-3-6391-002 circuit breaker is a magnetic trip circuit breaker, which utilizes an electromagnet. With this type of critical component, the coil is wired in series with the load. A plus and minus side of the coil is also wired to trip the circuit breaker when the current reaches a predetermined level. When the current through the coil increases, it creates a magnetic field which, in turn, causes the contacts to separate and disconnects the circuit. Furthermore, the contacts will not reset until the power supply is manually switched off or the current has decreased to a safe level.

Conclusion

In conclusion, the 219-3-6391-002 circuit breaker is a common magnetic trip circuit breaker used in residential and commercial buildings for overload and short-circuit protection. The working principle of this type of circuit breaker is based on an electromagnet that will cause the contacts to separate and disconnect the circuit when the current through the coil exceeds a predetermined value. It is important to note that the contacts will not reset until the power supply is switched off or the current has decreased to a safe level.

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