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标题: X,Y电容的Body应该看作导体还是绝缘体 [打印本页]
作者: prince    时间: 2008-10-22 17:34
标题: X,Y电容的Body应该看作导体还是绝缘体
各位大虾:* `. x9 Y. x* U3 @
    请问X,Y电容的Body应该看作导体还是绝缘体,为什么?
作者: luqing_sz    时间: 2008-10-22 17:45
基本绝缘.
作者: ljh809809    时间: 2008-10-22 17:52
Y1body 可以看作加强绝缘
作者: prince    时间: 2008-10-22 18:03
请问有什么依据吗?
作者: luqing_sz    时间: 2008-10-22 18:05
60335-1 22.37 For class II appliances, capacitors shall not be connected to accessible metal parts and their casings, if of metal, shall be separated from accessible metal parts by supplementary insulation.  This requirement does not apply to capacitors complying with the requirements for protective impedance specified in 22.42.  Compliance is checked by inspection and by the relevant tests.
作者: prince    时间: 2008-10-22 18:20
非常感谢1楼的热心回复
! a# K' F; Y' I) N/ k( I那如果说我的电容是要用60950-1来评估,Refer6 0335-1好像有点过咯,是否在60950-1有提到X,Y电容的Body绝缘?
作者: wuybpujr    时间: 2008-10-22 21:25
你可以参考GB4943-1 or  EN60950-1的1.5.6条款,此条有规定!
作者: skynet    时间: 2008-10-23 14:06
基本绝缘
作者: wolfxu    时间: 2008-10-23 14:34
加强绝缘，辅助绝缘，基本绝缘都有，看在什么位置了。
' w! Y* E) V. A3 z在法规的1.5。6节有提及
% \6 a7 _% L  `) FA capacitor connected between two line conductors in a PRIMARY CIRCUIT, or between one line
6 z$ W9 T; E$ \7 fconductor and the neutral conductor or between the PRIMARY CIRCUIT and protective earth0 w) @3 t7 q. s8 Y+ R) B
shall comply with one of the subclasses of IEC 60384-14 and shall be used in accordance' U+ e  b7 _" a9 O7 b8 e% _5 B
with its rating. This requirement also applies to a capacitor bridging DOUBLE INSULATION or
2 g( U+ k% O+ p2 \  _- t+ L3 zREINFORCED INSULATION elsewhere in the equipment.  \0 a# v+ f$ |' n; k' V6 K
自己找95的看一下。
作者: prince    时间: 2008-10-23 21:53
我是指X,Y电容本身的外壳咯.
作者: Alexsong    时间: 2008-10-24 15:40
根据OSM决议, 通过IEC60384-14认证的电容的外壳是能满足基本的要求, Y1电容的外壳是能满足加强绝缘的要求, 但在靠近引脚处的绝缘则不认为能满足加强绝缘的要求, 因为此部件的绝缘层比较薄.
作者: prince    时间: 2008-10-25 09:32
请问能提供OSM决议?
作者: prince    时间: 2008-10-25 11:09
我有找到OSM决议,但里面只有写明Y1,Y2电容可以当成B or S,Y1除两引脚外其外壳可当R,而X电容好像没有提到./ Y$ ~3 y' C" p' A4 @2 n: G. W6 @
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9 N  J+ N9 ~9 P: X7 D* M- M/ t+ U( L, ~
X电容底下又分为X1, X2, X3，主要差别在于: 1. X1耐高压大于2.5 kV, 小于等于4 kV, 2. X2耐高压小于等于2.5 kV, 3. X3耐高压小于等于1.2 kV
- S5 r& ?0 Q) n- M' v* Z
: H. F9 C& V+ [+ d6 |+ o8 c& UY电容底下又分为Y1, Y2, Y3，Y4, 主要差别在于: 1. Y1耐高压大于8 kV, 2. Y2耐高压大于5 kV, 3. Y3耐高压 n/a 4. Y4耐高压大于2.5 kV   {$ G  w% p$ w5 ?- f5 S5 ^( C4 H- T" Z
9 ?: L; w0 [/ T* z6 z! @! A
在安规标准上有按脉冲电压分X1,X2,X3电容；按绝缘等级来分Y1,Y2,Y3来分
! I. a9 e; W0 [综合以上, 所以是否我们需要看,X,Y电容的绝缘等级来判定其外壳的绝缘.
作者: sinmk    时间: 2008-10-26 17:40
加强绝缘,
作者: Alexsong    时间: 2008-10-27 15:39
引用第12楼prince于2008-10-25 11:09发表的  :  G( k1 J/ v; ~$ r( {( @
我有找到OSM决议,但里面只有写明Y1,Y2电容可以当成B or S,Y1除两引脚外其外壳可当R,而X电容好像没有提到.9 c/ s& ^' u, q! e
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' X0 ]* l5 C# n" P  Y, t; v, h8 o8 J$ ?' V
X电容底下又分为X1, X2, X3，主要差别在于: 1. X1耐高压大于2.5 kV, 小于等于4 kV, 2. X2耐高压小于等于2.5 kV, 3. X3耐高压小于等于1.2 kV
7 o. F" s/ U# Q" r( f: B.......
: @  y3 G+ {# k2 F8 b, b
通过IEC60384-14认证的电容是包括X电容的.
作者: wolfxu    时间: 2008-10-31 15:36
应该是绝缘体。
作者: 14828144    时间: 2008-10-31 15:42
外壳肯定是绝缘体了，这是很肯定的！
作者: orionouyang    时间: 2008-10-31 16:21
根据OSM决议, 通过IEC60384-14认证的电容的外壳是能满足基本的要求, Y1电容的外壳是能满足加强绝缘的要求, 但在靠近引脚处的绝缘则不认为能满足加强绝缘的要求, 因为此部件的绝缘层比薄弱。距离也不够，
作者: Marshal    时间: 2008-11-1 14:17
有两个依据可以看
0 s" r/ U& L7 _6 N1 [0 QX, Y电容的绝缘层可以看成功能/基本绝缘， Y1电容可以看成加强绝缘1 \% t+ y7 X6 k6 r& ~) o
依据有两个，
0 G' |2 q/ M" B0 M: q% P5 l一、如果做欧洲认证，可以参考OSM decision 1.5.7.1和2.10 (OSM decision网站http://www.iecee.org/ctl/osm_sheets/OSM-EE_decisions.html)$ W0 V( i4 L5 W4 X, ~( v/ U0 @
二、如果做北美认证，可以参考PAG 1.5.6-1
作者: prince    时间: 2008-11-2 01:05
引用第18楼Marshal于2008-11-01 14:17发表的  :
  o3 t' M% P/ P6 l: C有两个依据可以看
/ @& O) B6 w) E$ c. e6 QX, Y电容的绝缘层可以看成功能/基本绝缘， Y1电容可以看成加强绝缘
1 F3 D3 e0 {- `* T! ?& M! W% w0 h! W; Z依据有两个，
1 U% v. B  r! u一、如果做欧洲认证，可以参考OSM decision 1.5.7.1和2.10 (OSM decision网站http://www.iecee.org/ctl/osm_sheets/OSM-EE_decisions.html)
: \8 c1 ]- M" x9 M) I; N% S1 @二、如果做北美认证，可以参考PAG 1.5.6-1

# o. k4 a8 a. R* m- u, ^PAG 1.5.6-1 根据有的UL工程师的讲法只有认可到X1电容,如果是X2他们还是认为Body没有绝缘.
作者: ajay    时间: 2008-11-2 09:58
谁可以提供PAG 1.5.6-1 吗？
作者: prince    时间: 2008-11-2 14:42
DESCRIPTION OF ISSUE:9 h9 j, L: s8 }3 I* E& K, B3 r# g
Type of Issue: Technical/Certification
+ L  b8 |' T/ f; L* e2 J  u7 F/ gWhat insulation level may the casing of X1, X2, X3, Y1, Y2, and Y3 capacitors under IEC
& b5 n. Y, f! x1 I" T60384-14, and X1, Y1 and Y2 capacitors under UL 1414 (FOWX2), and capacitors under UL' R  `2 O9 s- K  g; x! z# N" n
1283 (FOKY2) be relied upon to act as?% l2 p4 n, y' ?8 B( p' q" p! F
APPLICATION GUIDELINE:
7 M+ N# n2 r, e/ x9 aCapacitor casings of Certified X1, X2, X3, Y1, Y2 or Y3 capacitors to IEC 60384-14 may be
  Z. O! }5 j& @+ j+ laccepted as Operational or Basic insulation when the capacitors are used in circuits compatible
" W, v7 v& w6 o/ A. a+ jwith their ratings. Therefore, these capacitors do not need to be provided with an additional,
/ s2 L1 r+ p- C+ A" `# i! Rdefinable insulation level when the capacitor casing is acting as Basic or Operational insulation.4 L; y6 Q0 f: |+ c: V6 [- l' x* f
(Y1 capacitors may be accepted as Reinforced insulation also.)
2 f, G$ ]" Y- o7 I0 L9 g2 n% ICapacitor casings of X1, Y1, and Y2 capacitors Recognized to UL 1414 under Across-The-Line
5 s6 N9 R5 q* y+ r! l+ {Capacitors, Antenna Coupling and Line-By-Pass Components (FOWX2) may also be accepted
) ], v% U. d: [/ bas Operational or Basic insulation when the capacitors are used in circuits compatible with their0 G3 T4 {; B  y3 u* {3 A
ratings. Therefore, these components do not need to be provided with an additional, definable insulation level, such as Recognized Component – Tubing, when adequate clearances are not6 B9 B9 _3 n. q* |8 Y8 t
provided between the capacitor casing and another component or an earthed dead metal part.
+ V0 Z- i9 \9 L$ y(Y1 capacitors may be accepted as Reinforced insulation also.)
& M' T% l# v/ }; BCapacitor casings of capacitors Recognized to UL 1283 under Electromagnetic Interference7 P' V. z/ ^9 ]( j5 A: ~$ f! [9 c
Filters (FOKY2) also may be accepted as Operational or Basic Insulation when the capacitors
% l# l- f* E" ?$ ]0 {5 C: dare used in circuits compatible with their ratings. Therefore, these components do not need to) [* M7 G, Y; a& p0 D9 i& b2 G5 F
be provided with an additional, definable insulation level when the capacitor casing is acting as5 u+ S0 m9 V$ y' k7 m
basic or operational insulation.
. q! S1 o7 y5 L: B4 A& ~RATIONALE:
$ s0 u. u7 [; c' y. D6 jUnder IEC 60384-14, X1, X2, X3, Y2, and Y3 capacitors are subjected to a minimum Electric
( S8 d! U3 o0 YStrength Test of 2000 V rms between live parts and case. Y1 capacitors are subjected to a 4000
$ ]6 {- [+ N5 FV test. (Y4 are only subjected to a 900 V test).
1 |1 Q( ^+ B$ G" x! N0 q3 lFor Recognized Component FOWX2 capacitors, UL 1414 now covers X1, Y1 and Y2 capacitors,1 D3 ?8 w8 L9 t4 K2 y
and the minimum Electric Strength Test is 2000 V between live parts and case. Y1 capacitors3 u2 r  X9 ?1 |0 {
are subjected to a 4000 V test.% f1 W8 w. e8 s' ?& b2 N) ?, N
For Recognized Component FOKY2 capacitors, UL 1283 requires the insulation between live
+ N- w' `% b' j7 k9 Kparts and casing is required to pass a 2Vr+1500V (Vrating =< 250V) electric strength test.
1 [' h) y. A5 uAdditionally, the case is required to be V-2 or less flammable (or equivalent), and meet UL 746C, L. s! e* ?7 T" `
(or generic) insulation requirements.
5 b; S' |; r; C9 ]( gOTHER:
" d/ e2 I+ {( g3 y" |Comments:
; F0 n/ K/ B$ a+ ]) ~Interpretation Systems:" T+ n  m! m+ d- t6 @% U
• IEC TC 108 Interpretation Sheets: Q24& ]* r* j: F' y) Z
• CENELEC OSM/EE Decisions: 1.5.7.1 (95/9, 97/1), 2.10 (95/8)
, _- i1 Q3 ]7 hRELATED APPLICATION GUIDELINE(S): 1.5.6-2
作者: nany    时间: 2019-6-18 17:19
学习了，谢谢分享
作者: 小部66    时间: 2019-9-27 11:32
学习了，谢谢分享。
作者: twobigseas    时间: 2019-10-10 09:28
学习了~~~
作者: hgl_law    时间: 2019-12-21 10:51
学习了。



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