4 m1 e! c5 }- K! fIn 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. ; J( z3 h: g n4 c) y: ACompliance 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.$ H9 h+ H8 ] `. x a" u, K0 x
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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 k. ~, m6 f. bThe 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, |" `* K, R* q7 n
The test shall be considered to have been successfully passed if the partial discharge is less than 10 pC during the measurement period 0 ^' A! x; M' R! }( O/ A( Z. H- Q1 _( x C
至于测试设备，网上一搜索就有了。 * g& m4 X5 }$ ?4 H作者: lu-zgsh 时间: 2012-9-26 12:29
来学习作者: ok_hmh 时间: 2012-9-27 11:28
UPD 是哪个电压？作者: feiniaoo 时间: 2013-5-4 17:19
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