Experimental Design of a 1.5KVA UPS Unit Using Locally Obtainable Materials under Prevailing Academic Laboratory Condition in Nigeria

International Journal of Electrical and Electronics Engineering

© 2015 by SSRG - IJEEE Journal

Volume 2 Issue 7

Year of Publication : 2015

Authors : A.I. Arowolo, I.O. Animasahun, A.O. Melodi

10.14445/23488379/IJEEE-V2I7P101

How to Cite?

A.I. Arowolo, I.O. Animasahun, A.O. Melodi, "Experimental Design of a 1.5KVA UPS Unit Using Locally Obtainable Materials under Prevailing Academic Laboratory Condition in Nigeria," SSRG International Journal of Electrical and Electronics Engineering, vol. 2,  no. 7, pp. 1-5, 2015. Crossref, https://doi.org/10.14445/23488379/IJEEE-V2I7P101

Abstract:

This study is aimed at designing, fabrication and evaluation of an efficient UPS based on locally obtainable material and conditions, for local application in academic environments. From a load survey, a load of 1.2 kW was obtained for Nigeria academics offices, which lead to the design of a 1.5 kVA UPS. A standard oscillating circuit based on CD4047 was adopted and adapted in the design. By loading requirements, 8 units of IRF250 MOSFETs were evaluated for the design. To improve the reliability (increase time to failure of battery) and effectiveness of the design, a battery charging controller and level detector were evaluated for addition to the design. The oscillatory circuit was tested using oscilloscope, and the open circuit and short circuit tests of the designed transformer for the construction was carried to define its efficiency. From the design, a square waveform of output voltage was obtained. The designed transformer efficiency obtained for the designed UPS is approximately 82%. A comparative technical and costs assessment show that the constructed UPS is cheaper but of less efficiency when compared with the imported 1.5 kVA products available in the Nigerian market.

Keywords:

UPS, Efficiency, Cost, Local Design, Office Load, Nigeria.

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