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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.
$ V! D+ `0 C9 K; d1 eCompliance 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
' K2 c2 {+ P: dThe 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$ I9 f: F, f2 ^) X3 |
The 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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: }" l" g; H. v. m3 w至于测试设备，网上一搜索就有了。$ T8 f9 Q3 R8 s. Z; w+ V
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发表于 2012-9-24 18:54
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