IMLHK121-2REG4-32880-5

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Circuit Breakers

A circuit breaker is an electrical device that breaks an electric circuit to prevent overheating or electrical shock. Circuit breakers are an important safety device for your home and are used in industrial settings as well. The model IMLHK121-2REG4-32880-5 application field and working principle will be discussed in this article.

Application Field

The IMLHK121-2REG4-32880-5 is a two-pole air circuit breaker with improved insulation performance, suitable for building and industrial applications. This circuit breaker is designed for overcurrent and short-circuit protection as well as ambient impact protection. This circuit breaker can be used in both indoor and outdoor installations, with its impact-resistant housing designed to meet protection class IP41.

The IMLHK121-2REG4-32880-5 is available in three different rated currents: 10A, 16A, and 25A. The rated currents and rated short-time withstand currents of these circuit breakers are respectively 10A/1500A, 16A/2500A, and 25A/3250A. It is suitable for rated operational voltages up to 400/415V AC and 50/60Hz supply systems.

Working Principle

The working principle of an IMLHK121-2REG4-32880-5 circuit breaker is based on the powering of a thermal-magnetic trip unit. The trip unit contains an over-current protection, which is a thermal device that will open the circuit if an over-current is detected for longer than a certain amount of time. This device is combined with a magnetic device, which will open the circuit instantly if an over- current is detected. The thermal device will provide continued protection against overload by opening the circuit if an ever-increasing current is sensed. The two devices work together by providing both short circuit and overload protection.

The IMLHK121-2REG4-32880-5 also has an integrated overvoltage protection. This protection will open the circuit if the voltage is above a certain threshold for a certain amount of time. This device is especially useful in cases of lightning strikes or power surges, as it will open the circuit before any damage can occur.

Conclusion

The IMLHK121-2REG4-32880-5 is a two-pole air circuit breaker with improved insulation performance, suitable for building and industrial applications. Its rated currents and rated short circuit-time withstand currents make it suitable for operations voltages up to 400/415V AC and 50/60Hz supply systems. The working principle of the IMLHK121-2REG4-32880-5 is based on the thermal-magnetic trip unit, providing both short circuit and overload protection. The integrated overvoltage protection provides additional safety against lightning strikes or power surges.

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