QUALITY ASSESSMENT OF METAL OXIDE VARISTORS BY NOISE SPECTROSCOPY

Lech Hasse, Janusz Smulko

Abstract

The noise spectroscopy in a frequency domain has been used as a diagnostic tool of high-voltage varistors consisting of grained ZnO. The electrical properties of tested specimens have been described. In this experimental study, we present the applied measurement system and the results of noise spectrum measurements for the selected structures of 280 V varistors. Noise properties are related to electrical characteristics of measured samples. It is suggested that the proposed procedure can be applied as an effective non-destructive testing method focused on defects and structural inhomogeneity detection in tested objects.

Keywords

varistors, diagnostics, noise spectroscopy

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IMEKO-WC-2009-TC10-351.pdf

DOI

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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