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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+ T$ H+ R" Z9 c" `2 f
protective impedance9 I# p) w$ o2 w9 s9 o: A' c2 T
impedance connected between live parts and accessible conductive parts of class II2 D# u/ D( T3 \8 o
constructions so that the current, in normal use and under likely fault conditions in the
1 f, Z% ~, H' f- J* p4 U* h! uappliance, is limited to a safe value
" I7 }2 y% a3 y, ^2 I
, `# ^; r! M( t* e/ w22.42 Protective impedance shall consist of at least two separate components. If any one
$ b0 K0 u2 z) n( |) w5 {of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not
9 k3 }7 s; N$ \6 x' Pbe exceeded.0 f, M j- b& s: s! \* e; e
Component impedances shall be unlikely to change significantly during the lifetime of the, L6 U- z0 w9 u* J1 I- [$ Y
appliance.6 K7 ^" v; e+ V/ q* ~
Compliance is checked by inspection and by measurement and if necessary, for resistors and
7 k3 M' F/ w2 h1 K+ Gcapacitors by the following tests.% c6 v- [9 O) ?) a$ R
Resistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
: O' U5 A' q& stests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
# ~- L: l. J% Eappliance. |
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