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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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* b4 h! J5 s1 P1 h) mIn 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.
1 Q) } d! y7 u7 W- m) bCompliance 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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. y1 N. N9 I6 n) f8 {7 pStarting 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+ u, p. {' A/ H: ]! _' `9 ?/ N$ 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
6 j# M+ P6 ~- P# I. a+ qThe 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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# C& A$ |4 g' @; C* W8 f至于测试设备，网上一搜索就有了。% @ j2 n, D9 b9 L4 |' S3 w6 X" j
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发表于 2012-9-24 18:54
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