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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: D8 g7 u' @5 _* ~4 j
protective impedance) I6 u/ r8 u: F
impedance connected between live parts and accessible conductive parts of class II
& p- \8 X: N& N0 O0 Mconstructions so that the current, in normal use and under likely fault conditions in the0 Y2 _6 I9 T. ]( H: d+ X; ^
appliance, is limited to a safe value* r# B0 ^+ f" q7 N" a! W6 s. Y0 {
, o" W, `; c9 G, F, |7 H2 ]22.42 Protective impedance shall consist of at least two separate components. If any one; g8 r: b& r6 b% h) x
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
* g' ^0 c" z7 `# [6 W# tbe exceeded.
9 {& P# d$ @+ b' ?" _$ j' @& ^( gComponent impedances shall be unlikely to change significantly during the lifetime of the, a9 P! r7 o1 C7 C5 s! G7 L
appliance.( N( y ?! m' x8 _" B. n. {
Compliance is checked by inspection and by measurement and if necessary, for resistors and: G1 y3 L8 S9 o
capacitors by the following tests.
+ i, z( S$ w0 } T% D' R- @Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
( o( e/ u: m. X& a) Z/ ptests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
8 b. U1 k+ \7 |( t. vappliance. |
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