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Automatic earth leakage circuit breaker with backup supply

Mohamed Ayub, Mohd Anuar (2013) Automatic earth leakage circuit breaker with backup supply. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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Power system protection is the most important requirement in the industrial or domestic electrical to prevent equipment from damage cause by leakage current. The ELCB is an important equipment to install at each of house, hospital, factory, or every place that need the power supply. The device monitors input current from power line by using the sensor Zero phase Current Transformer (ZCT), and then send the signals to the mechanical switch to tripped the circuit breaker. Industrial operation requires protection of their equipment from the lightning short circuit and also over-current, thus the ELCB will serve the purpose as the protection of their system .This research will attempt to improve the exciting ELCB design using PIC microcontroller to automatically switch it back to normal when the ELCB tripped in home during instantaneous over current or short circuit. This system provides a convenient way for house’s owner especially during absences in home. In this research PIC 16F877A microcontroller is used to control overall flow operation and operate the Power Relay /Protection relay, thus replacing the current mechanical switch. The outcome of this research after several testing process shown that the average sensitivity value for ELCB against leakage current is 76mA better 24% than 100mA set by manufacture.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3001-3521 Distribution or transmission of electric power
Depositing User: Normajihan Abd. Rahman
Date Deposited: 27 May 2014 02:53
Last Modified: 27 May 2014 02:53
URI: http://eprints.uthm.edu.my/id/eprint/5503
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