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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
; T7 L2 |, N8 B( Gprotective impedance% Y6 Y2 ^) Z8 i, k* X) N
impedance connected between live parts and accessible conductive parts of class II: u. G# g- K( }$ }3 K8 z* f, t" D
constructions so that the current, in normal use and under likely fault conditions in the
0 O6 N& R3 P/ ?2 b( e# M- `appliance, is limited to a safe value
* w- x* R6 M. d& |8 ~: N
3 G6 A1 y4 p2 T3 n22.42 Protective impedance shall consist of at least two separate components. If any one$ o: ~* R+ v0 x# `
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
9 l7 L) W9 Q+ m/ Z- ?3 lbe exceeded.
, P3 m! h- k% L9 @Component impedances shall be unlikely to change significantly during the lifetime of the) H6 k9 \' J/ q5 `% ^$ |8 g
appliance.
. p" a) o; w& Q+ qCompliance is checked by inspection and by measurement and if necessary, for resistors and
, t: {. J2 x9 I) z& E' bcapacitors by the following tests." H! o- _3 m: o- e
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
( U' z! V: o% dtests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
" L2 Y, x6 }# X7 u. kappliance. |
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发表于 2012-11-5 17:58
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