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本帖最后由 清水白菜 于 2012-9-25 13:58 编辑
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In addition, double and reinforced insulation shall withstand the partial discharge test according to 7.5.3, if the recurring peak working voltage across the insulation is greater than 700 V and the voltage stress on the insulation is greater than 1 kV/mm. M# }5 H4 c* e* r1 z+ O# P( h
Compliance is shown by impulse withstand voltage test according to 7.5.1 and the a.c. or d.c. voltage test according to 7.5.2, and partial discharge testing according to 7.5.3 if applicable.
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; D) N- s2 c: p4 E5 y7 q FStarting from a voltage below the rated discharge voltage UPD a, the voltage shall be linearly increased to 1,875 times UPD and held for a maximum time of 5 s y" {4 H6 w. F' u& T i4 L* ?9 \4 e
The voltage shall then be linearly decreased to 1,5 times UPD (± 5 %) and held for a maximum time of 15 s, during which the partial discharge is measured
7 f# {. Q, E! H- M T( wThe test shall be considered to have been successfully passed if the partial discharge is less than 10 pC during the measurement period
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至于测试设备,网上一搜索就有了。
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