UPG66-30924-2 Circuit Protection

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Circuit breakers are essential components of any electrical system, playing a vital role in protecting people and equipment from the dangers of electrical power surges. The UPG66-30924-2 is a type of circuit-breaker specifically designed for use in high-power applications that require reliable, efficient protection. In this article, we will discuss the application field and working principle of this particular circuit breaker.

The UPG66-30924-2 is a bolt-on type three-pole circuit breaker, suitable for high current applications up to 1250A and can be mounted in either a horizontal or vertical orientation. It is designed for use in industrial, commercial and residential applications, and is ideal for switching high-power electrical circuits such as in HVAC and power control systems. This circuit breaker features an adjustable trip setting which allows for setting the required circuit protection curve according to different levels of current.

In terms of its working principle, the UPG66-30924-2 utilizes a thermal-magnetic circuit breaker. Such breakers contain bimetal elements which act as a switch, closing when the current through it drops and thus allowing the circuit to remain closed. When an overcurrent is detected, the bimetal elements heat up due to the increased current, and quickly cool down if the current is reduced. By setting the trip current to the appropriate level, the bimetal elements can provide protection for the circuit against any sudden surge in current, without having to trip the breaker and interrupt the circuit.

The UPG66-30924-2 also incorporates a manual operating handle that allows operators to manually open and close the contacts. The handle is connected to two electrical contacts, via a mechanical linkage, which act to open or close the circuit when operated. This ensures that operators can safely and conveniently operate the circuit breaker in the event of an emergency or for testing purposes.

To ensure maximum reliability and safety, the UPG66-30924-2 has been designed to meet the stringent UL 60950-1 safety standard. This standard covers requirements for both the body of the device and the internal components, ensuring that the circuit breaker can withstand very high levels of heat and electrical current before tripping.

In conclusion, the UPG66-30924-2 is a robust and reliable three-pole circuit breaker, designed for use in high current applications. Utilizing a thermal-magnetic circuit breaker, adjustable trip setting and manual operating handles, the UPG66-30924-2 provides efficient and reliable protection for electrical circuits in a wide range of applications.

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