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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
8 u2 z/ |; _$ \: P$ ~4 |/ x4 Oprotective impedance& G4 k0 _' y" f) b. }( `
impedance connected between live parts and accessible conductive parts of class II! U$ S! m( J( r* D+ X! q% U, y9 R
constructions so that the current, in normal use and under likely fault conditions in the
3 {3 r4 G( Q9 N1 [, B: I; sappliance, is limited to a safe value
4 `1 W) E/ M4 |6 k
- n, H2 r+ q- @1 V22.42 Protective impedance shall consist of at least two separate components. If any one3 v: [7 D2 H. }9 e% V
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
5 o# Q# V n! ~0 ^6 d$ }be exceeded.
% `9 k) _) l" B& IComponent impedances shall be unlikely to change significantly during the lifetime of the
) M% B* t% I2 Zappliance.. q( A$ {/ f4 g! n( ^* l( {
Compliance is checked by inspection and by measurement and if necessary, for resistors and7 ~7 w5 I! w# x
capacitors by the following tests.
0 x/ [, P' }; O; z! wResistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the2 x5 P0 y2 z- \+ p
tests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
$ Y' t6 g2 X% l7 r( Fappliance. |
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发表于 2012-11-5 17:58
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