A Study Of Harmonics Effect On Electromechanical Overcurrent Relay

Zawani , Abdul Hadi (2010) A Study Of Harmonics Effect On Electromechanical Overcurrent Relay. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

This project is the starting point for detail research in the harmonics effect on electromechanical overcurrent relay. The main purpose of this project are to study about the harmonics current effect on the Miniature Circuit Breaker (MCB) and to characterized the harmonics current versus MCB tripping characteristic. Nowadays, most of the MCB set on the fundamental current and neglected the harmonics current that exist in normal distribution system. In addition, there is always the problem faced by the consumer where the MCB tripping occurred before the rated current value because that is taken by using common brand of clamp meter. In this project, experiment was conducted on the MCB which was injected with harmonics rich current by programmable AC source. Two types of clamp meter, common brand and good brand were used to measure the current from the experimental. Then, the new tripping characteristic of the MCB which included harmonics current will be characterized. It will be compared to original tripping characteristic (without harmonic) and new tripping characteristic (with harmonic).

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