1BU4R

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Introduction: Circuit breakers are used to protect electrical systems and equipment from damage caused by overcurrent or overload. The 1BU4R circuit breaker is one such device that is designed to provide protection for electrical systems in residential and commercial applications. This article will discuss the application field and working principle of the 1BU4R circuit breaker.

Application Field: The 1BU4R is suitable for use in residential, commercial and industrial buildings, as well as in marine and offshore applications. It is available in a range of amperage ratings from 20 amps to 200 amps, so it can be used for a variety of different applications. The 1BU4R also comes with a range of different accessories, such as mounting supports, auxiliary contacts and padlocking devices, which can be used to enhance the functionality of the device.

Operation Principle: The 1BU4R is a three-pole thermal-magnetic circuit breaker. It is designed to provide protection against both overcurrent and overload. In the event of an overcurrent or overload, the 1BU4R will detect the fault and quickly break the circuit, thus preventing damage to electrical systems and equipment.

The 1BU4R uses a bimetallic strip to detect an overload condition. The strip will heat up when the current flow exceeds its rated capacity, which will cause the strip to expand. This expansion will cause the strip to deform, which in turn will cause the breaker contacts to open.

Trip Characteristics: The 1BU4R has two trip characteristics that can be set - Instantaneous and Definite. The Instantaneous trip setting will trip the circuit breaker when an overcurrent condition is detected. The Definite setting will trip the circuit breaker when the overcurrent condition is sustained over a period of time.

Auxiliary Switches: The 1BU4R has two auxiliary switches, one for the main contact and one for the shunt trip. The main contact switch is used to monitor the status of the breaker, while the shunt trip is used to remotely trip the breaker from a remote location.

Conclusion: The 1BU4R circuit breaker is a three-pole thermal-magnetic device designed for use in residential, commercial and industrial applications. It is able to detect both overcurrent and overload faults, and can be set to either instantaneously or definite trip characteristics. The 1BU4R also has two auxiliary switches, one for the main contact and one for the shunt trip, which can be used to monitor the status of the breaker and remotely trip it from a distance.

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