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标题: IEC/EN61010-1:2010 对跨接初级与次级Y电容的要求。 [打印本页]
作者: wangwei    时间: 2011-11-16 10:23
标题: IEC/EN61010-1:2010 对跨接初级与次级Y电容的要求。
请教高手# y+ \( D! z& O! I

; }6 }* q. x! E* b+ ^IEC/EN61010-1:2010 对跨接初级与次级Y电容有什么要求。
6 h4 _, B, z, F* n现有：. ~. J; @: F: d; |! v
CY1电容器跨接在初次级上，满足加强绝缘距离要求。( _: F% u$ c4 }! B
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认证公司要求：6 H; n5 i/ ?* ]8 S. X( r4 Q" i
1. CY1电容耐压值应该更换为500V5 J: U6 z, y2 a( V7 t( O; i
2. 或者采用两个CY2串联/ |1 h2 L% B1 p; \

! C& ^7 |$ Q; i1 B2 i- s- l' z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
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8 T# r: X# u9 U: B1. 我想知道他们所说的耐压值什么意思？
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9 f% R& V3 X, t# X$ J2. IEC/EN61010-1:2010 是说的这个意思？) S$ r  @. [+ O: n6 [+ B
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下文为标准：9 z9 J8 e, `4 l! Z0 e4 a
6.5.4 PROTECTIVE IMPEDANCE! L  A* b' L' a5 h# S9 i& O: B
A PROTECTIVE IMPEDANCE shall limit the current or voltage to the levels of 6.3.1 in NORMAL
' G% K" O* c% R9 U6 nCONDITION and 6.3.2 in SINGLE FAULT CONDITION.
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# b3 y" n5 D& bInsulation between the terminations of the PROTECTIVE IMPEDANCE shall meet the requirements
3 }* N: f/ X1 r; n; d/ wof 6.7 for DOUBLE INSULATION or REINFORCED INSULATION., W: r: `' Y0 |! w

# v' B" J% L, C) D) O/ _8 NA PROTECTIVE IMPEDANCE shall be one or more of the following:4 ?, S. M/ o/ h1 T" x5 m

9 A6 x; |9 ]$ x+ H$ Y$ N! ?# }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:
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' v& i- `' l- S1) RATED for twice the maximum WORKING VOLTAGE;/ j; q* V; j  L& U
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2) if a resistor, RATED for twice the power dissipation for the maximum WORKING VOLTAGE.& }0 u! b8 E/ p) k- B, _  H
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b) a combination of components.
1 c3 I0 o; L9 r% u' n- hA PROTECTIVE IMPEDANCE shall not be a single electronic device that employs electron
. L1 K9 @& {# fconduction in a vacuum, gas or semiconductor' t! Z6 s7 q- U1 v
Conformity is checked by inspection, by measuring the current or voltage to confirm that they( c8 X. Z# s. n4 g
do not exceed the applicable levels of 6.3 and by measuring CLEARANCES and CREEPAGE
. x& v2 s- ?% `DISTANCES as specified in 6.7. Conformity of a single component is checked by inspection of* X6 V" @: K/ Z9 @, c" n2 D
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。. c5 m4 ~% r# R# v! D5 `

  P, I* n+ J# I* ]2 R  c3 y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）。
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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。



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