Stability of Metal-Oxide Varistor Characteristics in Exploitation Conditions

• Authors: B. Lončar , M. Vujisić , K. Stanković , P. Osmokrović
• Languages of publication: EN

Abstracts

EN

Wide-spread use of metal-oxide varistors for non-linearity over-voltage protection results in a variety of possible working conditions. It is therefore essential to have a thorough insight into their reliability in various exploitation environments. The influences of temperature variation, aging and radiation exposure on metal-oxide varistors characteristics were investigated in this paper. Stable and effective over-voltage protection over a wide temperature range is always a desirable property, one which significantly contributes to overall system reliability. Behaviour of metal-oxide varistors in the temperature range from -50°C to 150°C was investigated. Aging caused by exploitation was investigated by applying 1000 consecutive double exponential over-voltage pulses to the varistors. Resistance of metal-oxide varistors to the radiation is of special interest in nuclear, military, and space technology. Radiation effects of californium-252 combined neutron/gamma radiation were examined. Voltage-current characteristics, voltage-resistance characteristics and the value of breakdown voltage were used to characterize metal-oxide varistors operation. Non-linearity coefficient, defined from the voltage-current curve, was also used as a parameter. Results are presented with the accompanying theoretical interpretations of the observed changes in metal-oxide varistors behaviour.

Keywords

EN

85.85.+j

Discipline

• 85.85.+j: Micro- and nano-electromechanical systems (MEMS/NEMS) and devices

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 116
• Issue: 6
• Pages: 1081-1084

Dates

published

2009-12

received

2009-05-14

Contributors

author

B. Lončar

• Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia

author

M. Vujisić

• Faculty of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia

author

K. Stanković

• Institute of Nuclear Sciences "Vinča", P.O. Box 522, 11001 Belgrade, Serbia

author

P. Osmokrović

• Faculty of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia

References

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Identifiers

DOI

10.12693/APhysPolA.116.1081