NDLI: Influence of Nonuniformity of ZnO Varistors on Their Energy Absorption Capability

Content Provider	IEEE Xplore Digital Library
Author	Bartkowiak, M. Comber, M. G. Mahan, G. D.
Copyright Year	1981
Abstract	A simple thermomechanical model is applied to evaluate the influence of the nonuniformity of ZnO varistor disks used in surge arresters on their energy-handling capability. Puncture is the dominating failure mode for slightly nonuniform disks, but cracking becomes more likely as the degree of nonuniformities increases. It is shown that minimization of the chance of a failure of varistor disks at high-current pulses can be achieved by adjusting their resistivity in the upturn region of the I-V characteristic. Simulation of the behavior of varistor disks under high-current 4/10¿s pulses required by the ANSI standard tests shows that these tests provide very little information about the actual energy-handling capability of the disks. This conclusion suggests that alternate test methods should be developed and included in the relevant standards.
Starting Page	69
Ending Page	69
Page Count	1
File Size	363421
File Format	PDF
ISSN	02721724
Volume Number	21
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Zinc oxide Varistors Absorption Testing Thermomechanical processes Surges Arresters Conductivity ANSI standards Standards development current pulses Metal-oxide surge arresters varistors energy absorption capability failure modes ANSI standard tests electrical nonuniformity
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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Influence of nonuniformity of ZnO varistors on their energy absorption capability

The energy absorption capability and time-to-failure of varistors used in station-class metal-oxide surge arresters

Failure modes and energy absorption capability of ZnO varistors

Self-organizing maps applied to monitoring and diagnosis of ZnO surge arresters

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High Voltage Gradient ZnO Nonlinear Resistor Doped with Rare-Earth Oxide

Comparison of ANSI, IEC, and CSA standards' durability requirements on station-type metal oxide surge arresters for EHV power systems

Influence of Nonuniformity of ZnO Varistors on Their Energy Absorption Capability

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