1170-21-15A

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Circuit Breakers

A circuit breaker is a device used to control and protect electrical circuits, usually referred to as a switch. It may be integrated into a larger circuit board, or it may be a stand-alone device. This article will focus on the 1170-21-15A circuit breaker, which is a commonly used type.

1170-21-15A Application Field and Working Principle

The 1170-21-15A circuit breaker is primarily used in residential and commercial applications, such as homes, businesses, and factories. It is designed to be used in applications where the load on the circuit needs to be monitored. This includes such applications as lighting, motors, pumps, and air-conditioning systems.

The 1170-21-15A circuit breaker is a trip unit breaker, meaning that it has a sensing mechanism that detects an overload and trips the circuit when it detects a current beyond the rated value. It consists of two main components; the trip unit, which is the sensing mechanism, and the breaker contact, which is used to open and close the circuit when needed. The trip unit consists of a electromagnet which detects the current in the system, and a set of contacts which are used to open the circuit when a fault is detected.

When the current in the system exceeds the breaker\'s maximum rated value, the electromagnet in the trip unit is activated, which causes the contacts of the breaker to open, thereby cutting off the power supply. The breaker will remain in this state until the source of the overload is removed or corrected. Once the overload is gone, the breaker can be reset and the circuit can be restored.

The 1170-21-15A circuit breaker is designed specifically for residential, industrial and commercial applications, and is a commonly used type of circuit breaker. It is easy to install and use, and provides protection for electrical systems against overloads and short circuits.

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