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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.
) L% R& {( h, |! R/ _8 @. S. j, jCompliance 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) |5 G6 Z- N! X) ]. 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
7 s7 X$ J9 `1 l! a- I; O% WThe test shall be considered to have been successfully passed if the partial discharge is less than 10 pC during the measurement period1 A- l& ?9 K! {( P9 i
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至于测试设备,网上一搜索就有了。1 s6 B* ]6 {3 A& @# u; J
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