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这是标准条款，也不是Y电容都是保护阻抗的，要跨接可接触安全和危险部件间的$ n w' R6 ]+ n, W: f
protective impedance
7 q; l( E% w2 {& Dimpedance connected between live parts and accessible conductive parts of class II
8 D' L: i* Q) t: g! L' }constructions so that the current, in normal use and under likely fault conditions in the
) K5 L! j2 ]. ~6 q: aappliance, is limited to a safe value
6 [: X6 f9 c1 y* t3 o- {
. v1 f6 M+ J, i22.42 Protective impedance shall consist of at least two separate components. If any one
. j5 \# v' ~6 R5 e3 Iof the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not$ y8 i, r0 N/ Q, H M5 D5 H
be exceeded.
: v. |; w- `% p( q1 U, JComponent impedances shall be unlikely to change significantly during the lifetime of the0 t3 e$ X5 E( c1 A% K% i
appliance.
: I- Y7 g7 s- \Compliance is checked by inspection and by measurement and if necessary, for resistors and
7 p% T* `4 W8 F" l6 Ycapacitors by the following tests.' Y; A/ ?8 A3 E* X- W
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the3 l# K( x/ ^3 i
tests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
+ u% L- V0 R6 p7 lappliance. |
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发表于 2012-11-5 17:58
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