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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
% H( K! x9 U5 C/ uprotective impedance
" [/ y- I$ q9 i7 `9 k6 w& `5 aimpedance connected between live parts and accessible conductive parts of class II
; b! m# ^% a4 n8 z/ H# Hconstructions so that the current, in normal use and under likely fault conditions in the# J" ^' i4 r0 ?' w8 x( u
appliance, is limited to a safe value: ^. t6 p9 ?5 \5 V4 |* k0 p+ k
$ K+ \& A2 M/ w22.42 Protective impedance shall consist of at least two separate components. If any one
( v; P- H( {- a) Eof the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
8 X( g4 P- x$ s/ U. i: @be exceeded.
a" Z, P! j' zComponent impedances shall be unlikely to change significantly during the lifetime of the& Y9 j% |" r: W$ D9 f8 h
appliance.
6 W V$ e. ~) d# m. j% Q% UCompliance is checked by inspection and by measurement and if necessary, for resistors and4 v/ _0 w# ]8 ]+ E+ V! P/ N4 ?
capacitors by the following tests.
: c9 E+ `( U1 [. @2 c! T" ^6 HResistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
7 Q( n/ ~% [' L8 }2 t; s/ @ ctests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
: B8 r$ c& e) aappliance. |
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发表于 2012-11-5 17:58
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