On-line measurement of high voltage breaking current for vacuum circuit breaker

Peng Wang, Guixin Zhang, Lianzi Li, Lei Zhang, Quan Wang, Laihong Zhao, Hongtao Li, Chengmu Luo

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Measuring heavy fault current un-distortedly is essentially important in the research on the electric characteristic of vacuum circuit breakers in high-voltage switchgear. Based on non-contacting method for current measurement in high voltage environment, this paper proposes an electronic current transformer using the straight-part coil as the sensing part near high voltage conductor to measure fault current. Prototype has been made based on the analysis on structure and error characteristic. Test results show that the sensing part has a ratio error of less than -1.05% within ± 5 mm flat error and -1.29% within ±5° rotated error during installation. The approach is validated with the results of long-term field operation.

Original languageEnglish
Pages (from-to)91-94
Number of pages4
JournalDianli Xitong Zidonghua/Automation of Electric Power Systems
Issue number3
StatePublished - Feb 2007
Externally publishedYes


  • Breaking current
  • Electronic current transformer
  • Non-contact measurement
  • Straight-part coil
  • Vacuum circuit breaker


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