To detect phase wire breaks in a 6 – 10 kV overhead line, the negative-sequence voltage on the low-tension side of the 6 – 10/0.4 kV power transformer can be used. The results of studying the effect of a phase wire break in an overhead line, phase displacement groups, and phase unbalance of demand loads in a 380 V network on the negative-sequence voltage are presented. A device for signaling phase wire breaks in a 6 – 10 kV overhead line is described. The device is based on a microprocessor electricity meter installed on the low-tension side of a 6 – 10/0.4 kV power transformer.
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Translated from Élektricheskie Stantsii, No. 12, December 2017, pp. 34 – 40.
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Ershov, A.M., Khlopova, A.B. & Sidorov, A.I. Phase Wire Break Signaling for 6 – 10 kV Overhead Line. Power Technol Eng 52, 110–115 (2018). https://doi.org/10.1007/s10749-018-0918-0
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DOI: https://doi.org/10.1007/s10749-018-0918-0