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This document discusses applied electrical technology, with the phrase "Applied Electrical Technology" repeated multiple times. In a concise manner, it focuses on electrical technology and its applications, as the core subject of the content.

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The design and construction of 3KVA variac ranging from 0 500V with a digital display was carried out due to the fact that every electrical, electronic and laboratory appliances equipments are designed and manufactured to operate based on the expectation that the input voltage would be at certain value. In Nigeria, household electrical electronic appliances and also laboratory equipments are most time under threat of low voltage supply. Since the electric power supply distribution companies are unable to provide the consistent and adequate voltage level 220V demanded by these sensitive appliances. The design and construction of a 3000VA variac variable transformer with an input voltage of 230V to give an output of 0 500V is aimed at providing solutions to this driving issue of low voltage and also to update in the growing trend of digitalization using a digital display. The method applied to achieve this project include faradays law of induction, ohms law, e.m.f equation of transformer and voltage transformer ratio k ,where the number of turns in for the primary is 136turns and the secondary is 297turns approx. . The major components used to achieve this work are the copper wires and the laminated steels core also known as the toroidal core. The designed and constructed variac was tested with an input of 230V and the output result of 500Vmaximum was confirmed ok. If designed and properly constructed with standard electrical components and materials it could be used in sub stations as step up for distributions of electricity. It should be designed with heavy gauge coils, higher rated toroidal core and attached an indicator to indicate with beep sound when it is being overloaded above its capacity. Makinde Kayode | Man Alhaji Sulaiman | Lawal Olawale Kazeem "Design and Construction of 0-500V 3KVA Variac with Digital Display" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd29153.pdf Paper URL: https://www.ijtsrd.com/engineering/electrical-engineering/29153/design-and-construction-of-0-500v-3kva-variac-with-digital-display/makinde-kayode

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