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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
, k9 z& A7 O5 g1 L% w1 dprotective impedance2 t4 K( _7 f" i& y7 E: q
impedance connected between live parts and accessible conductive parts of class II0 q( D7 ]# m' u6 |& ]
constructions so that the current, in normal use and under likely fault conditions in the
|) a% O) Z9 |appliance, is limited to a safe value
* O( O. ?' H0 A8 j' |# `% J( X' H. C% s, s. t
22.42 Protective impedance shall consist of at least two separate components. If any one2 F$ |* {( C$ u" W6 `% A6 B. u* u; \
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not- w* |& e. K4 Q9 y. q" z1 Q
be exceeded.
" q$ I! o" J" m! A( Q2 mComponent impedances shall be unlikely to change significantly during the lifetime of the s7 N1 n) C4 f _9 X% e3 A
appliance.8 C' t& V* Y' p' |! Y
Compliance is checked by inspection and by measurement and if necessary, for resistors and
/ r/ d$ ]0 j0 dcapacitors by the following tests.* e+ A! {8 s& y
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the! V1 `: y5 R' m r# e
tests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the7 d! F5 A" i* ]8 ~6 p4 ~
appliance. |
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