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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
# `6 \6 ~! w& ]! Aprotective impedance
& p+ U+ l9 a' M8 W: _# Dimpedance connected between live parts and accessible conductive parts of class II; s8 p) ^0 @' `% n! l' g8 Q: {! l
constructions so that the current, in normal use and under likely fault conditions in the
2 Q) D& g6 V& q6 o+ aappliance, is limited to a safe value
; ]- {" X' u( E0 F2 _" K+ T6 Y' L% a" q1 w
22.42 Protective impedance shall consist of at least two separate components. If any one! q( s- I0 N( P
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not2 q0 ]; a# ^6 Z5 u6 V
be exceeded.0 v, A+ q7 W5 |8 t* i, i
Component impedances shall be unlikely to change significantly during the lifetime of the) K% y4 m! q5 k) U8 p& L' q
appliance.7 }+ F: J0 w W) }* w% b- Y2 p' x. A9 T
Compliance is checked by inspection and by measurement and if necessary, for resistors and
- `; k, T& r: {capacitors by the following tests.3 c8 ]% G5 V% ~2 k5 ~% Q
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the e& ^' h/ F* c# F) b
tests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the% A" P# v5 m4 W; u
appliance. |
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发表于 2012-11-5 17:58
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