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Effect of material and design parameters on the life and operating voltage of a ZnO varistor

Published online by Cambridge University Press:  31 January 2011

T. K. Gupta
T. K. Gupta
Affiliation:
Aluminum Company of America, Alcoa Laboratories, Alcoa Center, Pennsylvania 15069
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Abstract

A varistor's life has been defined as the time required to reach a limiting power density at which the power generated exceeds the power dissipated. Based on this concept, a working model for predicting the life of a ZnO varistor has been developed in terms of several critical material and design parameters. The model provides a direction as to whether these parameters should be maximized or minimized in order to enhance a varistor's life. Alternately, given a predetermined amount of the varistor's life, the model predicts a safe operating voltage under a given set of conditions.

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Type
Articles
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Journal of Materials Research , Volume 2 , Issue 2 , April 1987 , pp. 231 - 238
Copyright
Copyright © Materials Research Society 1987

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References

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