6 m# x7 _2 ]( M- l! r2 ]IEC/EN61010-1:2010 对跨接初级与次级Y电容有什么要求。 5 c$ A: G6 P0 M' w( N2 N6 s现有：6 P2 p4 ^ t) E1 m) e% T: {$ @
CY1电容器跨接在初次级上，满足加强绝缘距离要求。 ^$ k: ^! z0 Z/ F0 a$ k
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认证公司要求：, ]# N8 k+ o& i1 T1 j
1. CY1电容耐压值应该更换为500V % m6 Z9 W8 S. O) O ^! x2. 或者采用两个CY2串联 / e# K4 s# i# ]: o4 Y8 X+ }$ F! f , S4 M1 b4 I# r5 G9 Q目的：因为EN61010-1标准要求CY1必须要有2倍工作电压的耐压值 " a7 F/ S, u# [( r' j ! x+ J1 m, s3 o: T; n! n1. 我想知道他们所说的耐压值什么意思？ 3 E- \. L+ y% ` g1 H; V0 I$ V% ^$ F- P" V6 A
2. IEC/EN61010-1:2010 是说的这个意思？ 4 w8 s& j1 K N; t- I0 S1 Q; O& } |( E" ^% Z* `
下文为标准： , i' x5 B2 K. G! C, N: @4 l0 y6.5.4 PROTECTIVE IMPEDANCE! S$ C" Y" f5 `
A PROTECTIVE IMPEDANCE shall limit the current or voltage to the levels of 6.3.1 in NORMAL - e R" Y1 k3 r2 B ACONDITION and 6.3.2 in SINGLE FAULT CONDITION.7 `- x6 Z( z& A1 e, l
! S* r; v- \% r8 kInsulation between the terminations of the PROTECTIVE IMPEDANCE shall meet the requirements) h$ q. _1 p1 V4 L* K5 T& u7 c! @
of 6.7 for DOUBLE INSULATION or REINFORCED INSULATION.6 d7 _' C" `8 t' R
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A PROTECTIVE IMPEDANCE shall be one or more of the following:9 x& j$ i3 {( b' |, y' S
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a) an appropriate single component which shall be constructed, selected and tested so that safety and reliability for protection against electric shock is assured. In particular, the component shall be: h+ o* T4 U$ b6 D# H
# ~$ `3 \4 g/ a; l8 y8 Q1) RATED for twice the maximum WORKING VOLTAGE; b' f& k1 E5 x) C. O4 f; n
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2) if a resistor, RATED for twice the power dissipation for the maximum WORKING VOLTAGE. 6 J$ h, `4 E, }+ A, `# v2 w& q q% b! y* U2 d
b) a combination of components.. g$ _) c* M- Q) }1 F- k; h
A PROTECTIVE IMPEDANCE shall not be a single electronic device that employs electron ( n3 t4 v# H" gconduction in a vacuum, gas or semiconductor $ N. ]* C* H4 O+ V9 VConformity is checked by inspection, by measuring the current or voltage to confirm that they/ {! l# {3 k6 t3 ^. y
do not exceed the applicable levels of 6.3 and by measuring CLEARANCES and CREEPAGE ! I$ f+ I9 L% p& y1 F) |) G; D. uDISTANCES as specified in 6.7. Conformity of a single component is checked by inspection of4 x+ Z2 w9 H) k3 [
its RATINGS.作者: canhai2002 时间: 2011-11-16 11:54
耐压值是指电容的工作时最大电压值，方案1其实和方案2是一样的，都是为了避免电容耐压击穿，作者: ajay 时间: 2011-12-23 15:58
认证机构是对的。9 k& } G; Z$ ]
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正确来说不应该叫耐压值，而是电压额定值是指CY1电容的最大正常工作电压，比如常见的有AC 400V。单个AC 400V的CY1电容按照新标准的规定，是不能用在250V工作电压的场合当中了。用在网电源场合的CY1电容至少是500V （2 x 250）。 o" k/ N* Y% x b, \ h: j3 Y+ O
, r+ r: E* H Y* g9 j6 s两个CY2电容串联是比较好的方式，通常单个CY2电容为250V，两个串联可达500V，满足标准的要求。