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The arc quenching device with multi-short-gaps introduced in this paper allows the arc to be established by a lightning strike, and then the device extend arc with the high temperature and high pressure produced by arc until arc extinguishes. The duration of the process is very short and act trip caused by relay protection devices would not happen. To test the lightning protection performance of the...
The insulation of secondary system in substation, including secondary cables and devices, have to endure the high ac power-frequency voltage during the short-circuit fault. The ac withstand characteristics of the secondary cables and devices are experimentally investigated and discussed in this paper. The insulation breakdown mechanism of relays can be classified into three modes: air gap breakdown,...
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