IEGHF66-40073-40-UV

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Circuit breakers protect various electrical circuits from short circuits, overloads, and ground faults. In a world where electricity is increasingly essential for essential services, such as hospitals and transportation operations, safety and reliability are paramount. The IEGHF66-40073-40-UV is a circuit breaker that is specially designed and calculated to protect circuits and equipment from hazardous electrical faults. This article will discuss the application field and working principle of the IEGHF66-40073-40-UV.

Application field

The IEGHF66-40073-40-UV is a high voltage electric circuit breaker used primarily in transportation and electric utility systems. It can be applied in multiple main and/or feeder circuits, and is also suitable for use as a motor starter. In electric utility systems, it is used to protect exposed conductors from short circuit, overload and ground fault damage, while in the electric transportation industry it can be used to protect locomotives, electric vehicles, and even electric boats. Its high-resistance epoxy build is specially designed to resist harsh environments, making it a reliable device for electric application.

Working Principle

The IEGHF66-40073-40-UV functions in three distinct stages. Upon detecting an overcurrent fault in the circuit, the internal relay releases a trip-latch and opens the breaker contacts. This is the momentary phase, which typically lasts less than 1 second. The second stage is the long delay phase, which is initiated when the current hasn\'t subsided to a safe level after the first stage. During the long delay phase, the relay adjusts the opening time of the breaker contacts according to the magnitude of the current overload. The third stage is the “residual time” phase which starts after the current has dropped to a safe level. At this stage, the breaker enters a protection mode where any low-level fault, such as a ground fault, can more easily be detected and addressed. Finally, the breaker then reopens and automatically resumes normal operation.

Conclusion

In conclusion, the IEGHF66-40073-40-UV is a high voltage electric circuit breaker used in electric transportation and electric utility systems. It offers reliable protection against short circuits, overloads, and ground faults, thanks to its specially designed high resistance epoxy build. Its working principle is based on three distinct stages, the momentary phase, the long delay phase, and the residual time phase.

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