Automatic earth leakage circuit breaker with backup supply
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 monit...
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| 格式: | Thesis |
| 出版: |
2013
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| 主题: | |
| 在线阅读: | http://eprints.uthm.edu.my/5503/ http://eprints.uthm.edu.my/5503/1/MOHD_ANUAR_BIN_MOHAMED_AYUB.pdf |
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| 总结: | 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. |
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