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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
) R& @$ ~6 J+ O0 }! j/ }2 x5 Tprotective impedance8 M8 _/ k& V* ^8 z: J6 l8 L! C
impedance connected between live parts and accessible conductive parts of class II! \2 _, q1 X6 Q) L7 @) T5 N
constructions so that the current, in normal use and under likely fault conditions in the1 E1 S* T' B h- P' W( `
appliance, is limited to a safe value5 o" q" {, |1 v
. X3 ^' N" b2 }3 J, I. Y22.42 Protective impedance shall consist of at least two separate components. If any one( |- k Q" S) [/ l
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not: ~3 J) o# Q7 D( |( x% `7 t
be exceeded.# i5 x6 A3 {5 d# O
Component impedances shall be unlikely to change significantly during the lifetime of the
9 y8 `& X: i6 |3 Lappliance.
5 z9 \" M! K" @0 sCompliance is checked by inspection and by measurement and if necessary, for resistors and
5 U$ e7 i+ A1 F0 n" t5 w w. P: _capacitors by the following tests.8 ?3 M; ~) B7 G) y4 C3 _
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the4 D1 n6 U6 c* r9 Q
tests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the% T6 [5 J8 b7 e; X: V- z
appliance. |
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发表于 2012-11-5 17:58
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