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本帖最后由 清水白菜 于 2012-9-25 13:58 编辑 $ h! i: O, @& d8 a9 I; u
7 n. ^+ o- r4 n. c3 U1 lIn 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.; d [3 U/ \3 ^* q2 N/ N) Q+ R) \$ I. v
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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Starting 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 s9 H; a; y4 J2 K2 ?) |4 m! n: |8 T! w
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
3 ?3 L# F w) a6 vThe test shall be considered to have been successfully passed if the partial discharge is less than 10 pC during the measurement period) {5 F) v0 f& A f
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至于测试设备,网上一搜索就有了。2 M& k' ?- q6 h3 k6 t4 S( B o
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