Implementation of a 220v Ac Overload and High Voltage Monitor Alert System with Auto Shut Down

Abstract

The electricity supply in Nigeria is usually associated with voltage fluctuation that causes damage to connected loads. In this study, implementation of a 220V AC overload and high voltage monitor alert system with auto shutdown was carried out using an ATMega328p microcontroller. The circuit was simulated in Proteus Ver8.12 using Arduino software with C++ programing language. A prototype was constructed on a Vero board and tested for continuity and power ON. Performance analysis with 50 trials (25- high voltage, 25- overload) was used to calculate sensitivity and accuracy. Result shows good circuit continuity with no short circuits or bugs along the paths. Also, no component undergo heating in the circuit. Performance analysis test indicated sensitivity of 96% and 92% for high voltage and overload monitoring respectively. This implies that the device will correctly monitor 96% high voltage and 92% overloading conditions, but it will fail to monitor 4% high voltage and 8% overloading conditions. Accuracy of 94% implies that, the design conforms to the correct value specifications of the simulated circuit and that high voltage and overload monitoring using the constructed device can be compared to that of an ideal device and we are 94% sure. Even though the device shows more sensitivity to high voltage than it is to overloading, the sensitivity level is very good for a practical device, as such, it can be used for protection of our devices on the utility supply in homes and industries for smooth and steady electricity supply.