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本帖最后由 清水白菜 于 2012-9-25 13:58 编辑 ( K% R/ w, U' H6 p+ Z
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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.5 {1 D6 V( F! e2 @
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 s
9 P) Q& @! q* c8 uThe 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: D N. |6 _9 w: y
The test shall be considered to have been successfully passed if the partial discharge is less than 10 pC during the measurement period! W3 B6 _, U+ l" Q' x, e
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至于测试设备,网上一搜索就有了。5 V- S2 s8 _$ \: S9 R. i5 R
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