Investigation into the Metal Oxide Surge Arrestors' Failures

Ng Guat Peng; Norul Rafiq N. Khan; M. Noor Harun; Badrol Ahmad

doi:10.4028/www.scientific.net/AMR.620.246

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Investigation into the Metal Oxide Surge Arrestors' Failures
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 620Investigation into the Metal Oxide Surge...

Investigation into the Metal Oxide Surge Arrestors' Failures

Abstract:

Metal oxide surge arrestors (MOSA) are commonly used in the electrical power system to protect the insulation from the damaging effect of lightning. This paper presents the damage characteristics and possible root cause of two exploded ZnO type arrestors. Both failures were not caused by lightning surge. They had degraded due to moisture ingress, leading to contamination and corrosion, accelerating thermal runaway effect in the ZnO elements and eventually caused early voltage breakdown under normal operating voltage. This indicated an inadequacy in the sealing components.

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Periodical:

Advanced Materials Research (Volume 620)

Pages:

246-251

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.620.246

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Online since:

December 2012

Authors:

Ng Guat Peng, Norul Rafiq N. Khan, M. Noor Harun, Badrol Ahmad

Keywords:

Arrestor, Surge, Thermal, Zinc Oxide (ZnO)

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