Performance Analysis of Single and Parallel ZnO Varistor Under Multiply Strokes

doi:10.11930/j.issn.1004-9649.2016.10.055.05

Electric Power ›› 2016, Vol. 49 ›› Issue (10): 55-59.DOI: 10.11930/j.issn.1004-9649.2016.10.055.05

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Performance Analysis of Single and Parallel ZnO Varistor Under Multiply Strokes

XIAO Yang¹, YANG Zhongjiang¹, LIU Jian¹, ZHANG Chunlong², LV Dongbo²

1. Nanjing University of Information Science and Technology, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing 210044, China;
2. Lightning Disaster Warning and Protect Center of Hei Long Jiang Province 150030, China

Received:2016-03-29 Online:2016-10-10 Published:2016-11-07
Supported by:
This work is supported by the National Science Foundation of China (No. 51577106).

Abstract

Abstract: 8/20 μs multiply strokes are applied to ZnO varistors with 20 kA amplitude and 50 ms time interval. The experiments are performed on single ZnO varistor, parallel ZnO varistors with 10 V potential difference and parallel ZnO varistors with zero potential difference. The experimental results show that single ZnO varistor cannot bear huge energy of strokes. The bearing capacity of parallel varistors are doubled compare with single ones with same 40 kA waveform. However, with 10 V potential difference, the bearing capacity of parallel ones is even less than single configuration. By investigating electrical characteristic, temperature and feature variation of ZnO varistor under the multiply strokes, it is found that major damage mechanism of ZnO varistor is thermal breakdown.

Key words: multiply strokes, lea kAge current, ZnO varistor, thermal runaway

CLC Number:

TM863

XIAO Yang, YANG Zhongjiang, LIU Jian, ZHANG Chunlong, LV Dongbo. Performance Analysis of Single and Parallel ZnO Varistor Under Multiply Strokes[J]. Electric Power, 2016, 49(10): 55-59.

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Performance Analysis of Single and Parallel ZnO Varistor Under Multiply Strokes

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