R21-0..00162957

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A circuit breaker is an electrical device designed to cut off electrical power in a circuit, preventing it from overloading or short circuiting. The R21-0.00162957 circuit breaker is a type of molded-case circuit breaker (MCCB) designed to provide highly reliable motor protection. It is designed to protect motor circuits with varying loads and intermittent duty cycles. The R21-0.00162957 provides a complete range of circuit protection by combining traditional motor protection functions with additional features such as manual and automatic reset, internal current limiting and trip proof contact design.

Application Field of the R21-0.00162957 Circuit Breaker

The R21-0.00162957 circuit breaker is designed to be used in a variety of applications where motor protection is desired. The R21-0.00162957 is most commonly used in:

• Motor circuits with more than one phase.
• Motor circuits with high current ratings.
• Motor circuits with frequent startups and shutdowns.
• Motor circuits that require long run times.
• Motor circuits with multiple load types.

The R21-0.00162957 provides an effective means of protection from overloads and short circuits, as well as providing higher levels of motor protection than other circuit breakers. The use of this device helps to reduce the risk of costly motor damage and improve system reliability.

Working Principle of the R21-0.00162957 Circuit Breaker

The R21-0.00162957 circuit breaker is composed of a molded-case with a thermal-magnetic trip unit. The thermal-magnetic trip device includes two independent trip elements: an adjustable thermal element and a bi-metallic element.

The thermal element can be set to trip at a set time delay or at a set temperature. The bi-metallic element responds to overcurrent through thermal expansion of the contact material, which causes the contacts to snap open.

In order to protect the motor, the R21-0.00162957 can be set to trip at varying current ranges, allowing the user to select the appropriate setting for the motor being protected. It also features an integrated manual reset and an automatic reset feature.

The R21-0.00162957 also includes an internal current-limiting feature. This feature helps to reduce the amount of current that can flow through the circuit breaker, preventing damage to the motor from large in-rush current. Finally, the trip proof contact design helps to prevent accidental contact closure.

In summary, the R21-0.00162957 circuit breaker provides reliable and effective motor protection, reducing the risk of motor damage and increasing system reliability. The adjustable trip settings and current limiting features provide flexibility and additional protection for the motor.

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