DESIGN AND IMPLEMENTATION OF PROGRAMMABLE (USER SELECTABLE) MAINS MONITOR WITH SURGE PROTERTOR

Abstract

Power irregularities and fluctuations are major problems in Nigeria. To prevent and control these abnormalities, the need for mains monitor with surge protector is necessary. Voltage fluctuation is a critical problem for electrical and electronics equipment which could damage power equipment either at low or high voltage. This paper therefore presents the design and construction of programmable (user selectable) mains monitor with surge protector. The paper discusses the design, construction and operation of a programmable (user selectable) mains monitor with surge protector. The design is meant to automatically monitor the mains voltage to ensure that it is within the selected permitted voltage range of 170 – 240VAC. LCD interface was used for the output display. PIC16F689A microcontroller was used to implement the control program. The design is recommended for both household and industrial power equipment protection.