3120-F521-P7T1-W04A-0.2A

Circuit Breakers

A circuit breaker is an electrical device designed to protect an electrical circuit from damage caused by overload or short circuit. The model 3120-F521-P7T1-W04A-0.2A is a circuit breaker that is suitable for a wide range of applications. In this article, we will discuss the application field and working principle of this model with regards to circuit breakers.

Application Field

The 3120-F521-P7T1-W04A-0.2A is designed for applications that need to protect electrical circuits from excessive currents that can produce dangerous amounts of heat or short circuits. It can be used in residential and commercial settings, such as home appliances, air conditioners, refrigerators, pumps and motors. It can also be used in industrial installations and applications, such as machine tools, welding equipment, and automated lines.

The 3120-F521-P7T1-W04A-0.2A has a thermal rating of 690 VA and is able to interrupt 175% of its rated current, making it suitable for applications that require a high level of protection. It is also UL-recognized and CE-certified for safety. Additionally, it is designed to be user-friendly, with an LED indicator and a reset button for easy troubleshooting.

Working Principle

The 3120-F521-P7T1-W04A-0.2A works by using a thermal-magnetic trip unit. This type of trip unit is composed of two elements: a thermal element and a magnetic element. The thermal element is made of bimetal strip, which is able to detect temperature changes due to the flow of current. When the current flow in the circuit reaches a certain threshold, the bimetal strip will heat up and cause the thermal element to trip. Meanwhile, the magnetic element is able to detect the current flow in the circuit and, when it reaches a certain threshold, causes the magnetic element to trip.

Both the thermal element and the magnetic element have adjustable current settings that can be used to customize the trip setting of the 3120-F521-P7T1-W04A-0.2A to the needs of the application. This customization allows for the circuit breaker to be tuned to provide maximum protection without causing unnecessary and inconvenient circuit interruptions. In addition, the 3120-F521-P7T1-W04A-0.2A is designed to reset itself automatically after the fault has been cleared.

Conclusion

The 3120-F521-P7T1-W04A-0.2A is a thermal-magnetic circuit breaker that is suitable for a wide range of applications. It has a high endurance to current flows, making it ideal for high-power applications, and its adjustable settings make it easy to customize for specific applications. The thermal-magnetic trip unit employed by the 3120-F521-P7T1-W04A-0.2A ensures maximum protection against overloads and short circuits.