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本帖最后由 清水白菜 于 2012-9-25 13:58 编辑 5 o" N7 d; B: N/ j8 M/ _! F2 F6 B
6 H9 R8 [% Y( @' ~- d# r: o; F2 DIn 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.! E, M1 l, k @1 a
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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: ^& S- u I* A7 |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 s$ i: ~) O! M% i: |+ X3 L
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 measured1 ]0 Z, p& |* ?$ }
The test shall be considered to have been successfully passed if the partial discharge is less than 10 pC during the measurement period1 D. U; k2 Q2 W
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至于测试设备,网上一搜索就有了。% q4 c2 O& }) W) K6 m! a9 G
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