UTHM Institutional Repository

Automatic residual current devices

Bonari, Ahmad Khairuddin (2015) Automatic residual current devices. Masters thesis, Universiti Tun Hussein Onn Malaysia.


Download (803kB)


Power system protection is the most important requirement in the industrial or domestic electrical to prevent equipment from damage cause by leakage current. The RCD 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 current sensor and send the signals to the mechanical switch to trip the circuit breaker. Industrial operation requires protection of their equipment from the lightning short circuit and also over-current, thus the RCD will serve the purpose as the protection of their system .This researchwill attempt to improve the exciting RCD design using PIC microcontroller to automatically switch it back to normal when the RCD 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 relay, thus replacing the current mechanical switch. The outcome of this research after several testing process shown that the average sensitivity valuefor RCD 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: 29 Feb 2016 08:23
Last Modified: 29 Feb 2016 08:23
URI: http://eprints.uthm.edu.my/id/eprint/7699
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item


Downloads per month over past year