|
|
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3 k. j8 `+ L- ~7 @2 ~' P2 B+ `
protective impedance
2 V) ~9 E& U; }impedance connected between live parts and accessible conductive parts of class II
" m) d- ]7 ^! p2 w2 A6 F) lconstructions so that the current, in normal use and under likely fault conditions in the
" V' v$ L; L& r' }" fappliance, is limited to a safe value2 _4 G' _+ `3 v" H i, k: v
/ p% M: c/ W" ]6 Q/ C22.42 Protective impedance shall consist of at least two separate components. If any one4 M& [, U2 {2 U+ }, k: B
of the components is short-circuited or open-circuited, the values specified in 8.1.4 shall not# ~/ d1 B d& C( L% f3 ~% M% [. F! N
be exceeded.
" c: y4 e2 P, BComponent impedances shall be unlikely to change significantly during the lifetime of the. H# e, ^7 F" A3 ]; ?) ^
appliance.
" z" D4 @# x& U _+ |. lCompliance is checked by inspection and by measurement and if necessary, for resistors and% C4 R2 v) C) q
capacitors by the following tests.
) ^" H+ s: h+ l; C2 i" B7 vResistors are checked by the test of 14.1 a) in IEC 60065 and capacitors are checked by the
* t0 w& a& V7 d0 D8 @9 f: ptests for class Y capacitors in IEC 60384-14 appropriate to the rated voltage of the
; Q7 u! q& k4 u+ aappliance. |
|
[复制链接]
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
发表于 2012-11-5 17:58
显身卡
