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The structure with gap is adopted. During normal operation, the insulation gap bears the operating voltage, and the ZnO resistor sheet does not bear the voltage, so there is no ageing problem.
Installed and used in parallel with the insulator, the current passing performance is improved to 120kA, and the lightning protection level of the line is significantly improved. (Take the multiple minefields of C1 and above as an example, the lightning trip rate of the 35kV line is 8-12 times /(100km·a) before lightning protection transformation is carried out, and the lightning trip rate drops to 0.45 times /100km· an after the application of 35kV big flow gap arrester.)
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