标题: Simpson 229-2 泄漏电流测试仪问题 [打印本页] 作者: mf0715 时间: 2017-12-13 08:34 标题: Simpson 229-2 泄漏电流测试仪问题 UL 1082 31.5章节描述了泄漏电流仪的要求，其中下述几条是什么意思？不是特别的理解，请各位协助一下，谢谢 5 p: A: n" R# ~' Vb) The meter is to indicate 1.11 times the average of the full-wave rectified composite waveform of voltage across the resistor or current through the resistor. 此条不是很理解 0 R5 W6 V+ j- p " k5 ~2 X6 E, p8 {7 B) N: } q: N0 }8 j5 a; z
c) XXX is equal to the ratio of the impedance of a 1500 ohm resistor shunted by a 0.15 microfarad capacitor to 1500 ohms. At an indication+ w# C" w1 R; y' y9 `2 [
of 0.5 mA, the measurement is to have an error of not more than 5 percent at 60 Hz 此条意思是否是：1500欧姆的电阻并联0.15微法的电容再除以1500欧姆的电阻。在仪器指示0.5mA时，在60Hz下，不能误差超过5%？ O' E$ ?) }) b6 c8 G5 c0 k9 L# O/ W) ^4 | h) h, w
5 T9 c; X( w1 c+ A' Ld) Unless the meter is being used to measure leakage from one part of an appliance to another, the meter is to be connected between the accessible parts and the grounded supply conductor. 此条不理解的地方在于，UL的家电我看到都是做外壳到地，没有看到过表面间漏电流啊，那写这个话是什么意思呢？8 E6 z; }" ]; A6 r, x& q3 W3 O
; k, }2 N5 Z3 X6 p$ x 作者: mf0715 时间: 2018-9-14 10:42
没人回复？作者: ryan2014 时间: 2018-10-23 08:51
一直想知道像228表等怎么按60990附录校准输入阻抗和传输阻抗的