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Effect of power line filter on MOV clamping voltage

Sudheer, ML and Gunasekaran, MK (2002) Effect of power line filter on MOV clamping voltage. In: Proceedings of the International Conference on Electromagnetic Interference and Compatibility '99, 6-8 Dec. 1999, New Delhi, India.

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Abstract

Metal oxide varistors (MOV) are popularly used to protect offline electronic equipment against power line transients. The offline switched mode power supplies (SMPS) use power line filters and MOVs in the front-end. The power line filter is used to reduce the conducted noise emission into the power line and the MOVs connected before this line filter and the MOVs connected before this line filter to clamp line transients to safer levels thereby protecting the SMPS. Because of the presence of 'X' capacitors at the input of line filter the MOV clamping voltage is increased. This paper presents one such case and gives theoretical and experimental results. An approximate method to predetermine the magnitude of such clamping voltages is also presented.

Item Type: Conference Paper
Additional Information: Copyright 1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly, (CEDT) Centre for Electronic Design & Technology)
Date Deposited: 16 Mar 2012 10:21
Last Modified: 16 Mar 2012 10:21
URI: http://eprints.iisc.ernet.in/id/eprint/43886

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