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Circuit Breakers

A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and immediately discontinue electrical flow. The 1C40UR is a type of circuit breaker used in high-power applications.

Application Fields

The 1C40UR moulded case circuit breaker (MCCB) is a high-power device used in everything from industrial automation applications to energy distribution and process control. The 1C40URs can be used in a variety of challenging conditions, including high current and arising levels of fault protection for demanding industrial applications. It provides correct coordination for protection on a variety of systems.

The 1C40UR is designed for either indoor or outdoor installations and offers protection against overloads, short-circuits and electrical faults. The MCCBs are suitable for use in generating and distributing electricity, residential and commercial services, circuit protection and power and lighting control. This makes them great for basic power distribution and control applications in places such as factories, warehouses, airports and train stations.

Working Principle

The 1C40UR MCCB operates according to a recombinant thermal-magnetic release mechanism. The thermal part of the MCCB works as a heat counter to detect when operating temperature has exceeded the pre-set parameters, while the magnetic part of the MCCB works as a spring-operated current counter against a fixed setting. Once either the thermal or magnetic parts are triggered, the power to the circuit is shut off instantaneously.

The 1C40UR also featured an adjustable current limiting device which ensures the correct release characteristic at fault conditions. This ensures that the MCCB can cope with very large current surges due to short circuits, ensuring the protection of the system. The 1C40UR also contains a contact-gap that allows the user to adjust the device’s level of protection, while a manual test button allows the device to be tested and the functioning of the MCCB to be verified.

Conclusion

The 1C40UR is a powerful and versatile moulded case circuit breaker that is ideal for a wide range of power distribution and control applications. The thermal-magnetic tripping mechanism ensures fast response times and offers high levels of protection for the system, while adjustable current limiting settings ensure correct functioning of the device.

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