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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
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IEC/EN61010-1:2010 对跨接初级与次级Y电容有什么要求。4 q" I' b! m/ M! A6 P: Z
现有：
, t" W6 f5 C6 c) U' a$ k2 S; v8 f! P7 cCY1电容器跨接在初次级上，满足加强绝缘距离要求。
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6 c8 d9 M0 ~; O# u5 t- X认证公司要求：. g3 S+ a  }% f5 F' s5 w5 u
1. CY1电容耐压值应该更换为500V* c: X4 ^( ]7 j8 _  ]
2. 或者采用两个CY2串联2 }9 ^8 Q7 U8 K% f& y/ c! m

( B* A3 P5 O& H7 m; O/ h  K7 \8 V4 J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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1. 我想知道他们所说的耐压值什么意思？! a; d! V0 f$ E$ B
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2. IEC/EN61010-1:2010 是说的这个意思？
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* J6 j, Q6 y8 }- Z. J下文为标准：( ]- w$ i( C% y, w& }* i
6.5.4 PROTECTIVE IMPEDANCE
; \. R2 c. [2 M8 h9 o. B3 ]9 p4 `A PROTECTIVE IMPEDANCE shall limit the current or voltage to the levels of 6.3.1 in NORMAL
) ]# Q0 S; k3 A) [* tCONDITION and 6.3.2 in SINGLE FAULT CONDITION.- M1 I: |+ m" i( [* [* N

5 R) T1 R) ?. v- @) NInsulation between the terminations of the PROTECTIVE IMPEDANCE shall meet the requirements
" R7 P% S- A! h* @; P% xof 6.7 for DOUBLE INSULATION or REINFORCED INSULATION.* u& E$ m6 o) f! W3 p6 H
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A PROTECTIVE IMPEDANCE shall be one or more of the following:- Y/ e5 _2 a: K0 u! 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:) R2 E& q, W! Q

' P1 f2 Y/ A4 {/ T1) RATED for twice the maximum WORKING VOLTAGE;
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2) if a resistor, RATED for twice the power dissipation for the maximum WORKING VOLTAGE.
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0 ^" \2 h! L6 A; s/ t- Mb) a combination of components.9 q5 k6 q8 M+ N  g7 h$ Q! U5 T( y
A PROTECTIVE IMPEDANCE shall not be a single electronic device that employs electron
( b8 u+ ?# M1 _( E1 i2 ~$ oconduction in a vacuum, gas or semiconductor
9 C5 G7 E: b$ u9 ^: A( l5 L, vConformity is checked by inspection, by measuring the current or voltage to confirm that they# Q  C" x, b5 k1 p: P) A9 I2 _& V
do not exceed the applicable levels of 6.3 and by measuring CLEARANCES and CREEPAGE
& _0 Y5 `/ g1 k% @" x+ MDISTANCES as specified in 6.7. Conformity of a single component is checked by inspection of
% ], s) `; h6 r# Rits 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。
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6 u, h2 `5 A. q2 y8 H4 g1 L' e' G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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7 u/ Z+ T: O4 H5 w6 j& O: ]' H8 V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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