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IAEI Magazine | Author: Kenneth Brown
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Kenneth Brown

Kenneth J. Brown currently holds the position of director of power quality engineering at Leviton Mfg. Co. He has an undergraduate in electronics engineering from the Ohio Institute of Technology and an MBA from West Coast University. He is currently chairman of the Technical Committee at NEMA 5-VS Low Voltage Surge Protective Devices. He has been involved in the design of surge protective devices for 8 years and prior to that he worked as a manager of subsystem development on the guidance section of an air-to-ground weapon system.

Articles

Metal Oxide Varistor Degradation

The purpose of this document is to provide an overview of the degradation process that can occur in metal oxide varistors (MOVs). MOVs are variable resistors primarily consisting of zinc oxide (ZnO) with the function of limiting or diverting transient voltage surges. MOVs exhibit a relative high energy absorption capability which is important to the long term stability of the device. The growing demand of ZnO varistors is due to the nonlinear characteristics as well as the range of voltage and current over which they can be used.
MARCH-APRIL 2004