关键元件中外壳可以认为是基本绝缘的元件

sjm2005

广东安规检测
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请问一下：关键元件中，外壳可以认为具有基本绝缘的元件有哪些？
/ Z3 R2 v! v6 J7 u& P, L+ p$ h我知道Y电容是可以认为基本绝缘的。那压敏电阻，X电容，relay，IGBT，MOSFET这些元件呢？
还是看每个审核人自己认为的？
" z9 r# `1 x- E6 L谢谢

xuxuxu

VIENNA – OSM/EE MEETING FOR ELECTRONIC EQUIPMENT  05 – 06 MAY 2010
9 }# i( ^, w4 a: c8 ^
-ITEM FORM-
BSI – United Kingdom/N° 1/2010

* u3 h) O: W7 ?* a8 IStandard:
, O" I7 g7 y0 NEN 60950-1:2006+A11+A1
) l  j6 {$ Y9 e3 d% Dand EN 60065:2002+A1
. q' \) |1 G2 u# J# a        Sub clause:
: S/ B7 v% V, X: a2.10.5.6 (EN 60950-1)
( B) o7 S4 B& V# k  H- t8.8 (EN 60065)
        Sheet No.:
3 J: z9 A( ]6 h2 n+ |Page 1 of 1
Decision 10/1

# U4 n1 Z$ m% B+ T$ jSubject:
Insulation on the body of electrolytic capacitors
* j$ o" p" @, n$ S# O" i        Key words:
5 R" S( b! {, o3 A& ZInsulation
0 W/ F2 y. b4 tThin sheet material        Meeting:
OSM 2001,
+ j' I, F. l# J1 QAgenda item n° 9.6
OSM 2010-05-05,
: V8 R( ~9 l1 z: u( HAgenda item n° 6.1
! N' Z, p# |4 g" R* \
Question 1) Minimum distance through insulation
  |6 z3 ]3 W6 y) L2 L8 T9 |Can the insulation of an electrolytic capacitor be regarded as basic insulation?
: j  X1 _; G6 j" E(see attached photo) ?
+ {. \. Q( s; D! n' `3 f
Along the side of the component the plastic insulation will withstand the electric strength test (1500V ac). However on the top and bottom of the capacitor the plastic is stretched / bended around the edge, and the insulation can therefore be mechanically stressed. The question is, can this be accepted as long as the insulation withstand the electric strength test, without any further considerations?
5 G% B: p: S/ S- V; m

: w" u! O' f5 r" r5 P--------------
Question 2) A common failure mode of electrolytic capacitors causes a pressure build up within the component, which results in the capacitor expanding in size, to the point where the outer marking sleeve/insulation may split – exposing the capacitor can (normally connected to the negative capacitor terminal).
4 }, R+ x& u" |, ~2 G  }Is it permissible to consider that the outer marking sleeve/insulation of electrolytic capacitors, as meeting the requirements of thin sheet material (EN 60950-1:2006 Sub-clause 2.10.5.6 and EN 60065:2002 Clause 8.8), without taking into account this possible failure mode?

OSM EE conclusion: 1 decision 0 only in the minutes
* F0 o1 y) U7 o' a0 \
& ]0 g/ R" W- Y2 }" XDecision 10/1:
The conclusions from OSM 2001, agenda item 9.6 was agreed to be applied and converted to Decision 10/1, item 1:
On the side the insulation can be regarded to comply with the requirements for basic insulation, but on the bottom or top side all manufacturing tolerances have to be taken into account. Information of the manufacturer (especially variation due to ageing) is needed.
  V1 V( _9 z8 |' M; f
Decision 10/1, item 2:
Requirements for failure mode are to be taken into account.
EN 60950-1 Clause 5.3.9; Compliance criteria for abnormal operating and fault conditions.
# _* ~4 M( Y2 {7 o8 B  F60065 Clause 11; Fault conditions.

Is to be send to MT1 and MT2 (October meetings 2010) for confirmation.
3 v7 P; Y0 A0 ]Explanatory notes:
If it is a critical component it must be listed in the critical component list.

1 g9 ]2 w0 n# t% K* n3 G  W

xuxuxu

OSM/EE DECISION SHEET
2 Q! }- o/ [( G6 F6 c2 r  x
1 T$ |9 P9 v7 T* \' g% M
Standard:  
EN 60065:1998
2 A, H2 t1 L8 T- t4 t& wEN 60065:2002
% ^3 G% f0 w( z. D( s  L6 g3 `        Sub clause:
( r/ }0 |3 g2 _7 P/ s: |; h) j8.6        Sheet no.  
97/1

8 L4 {9 N/ D4 l) f& ?7 u$ uPage 1 of 1      
$ K; X. ]7 }5 S- h- J* H- cSubject:
The enclosure of Y1 capacitor
# L7 R4 z8 ^5 v+ W- x' o; t- h; ^
1 l- s4 r5 |2 G! x( e7 T$ @        Key words:
" _7 F/ V% y8 i" AReinforced insulation area        Meeting:
) H6 M1 u# }5 t+ W2 u' b$ b% HOSM/EE – 1997
Item No. 3
: [3 W2 u4 s  f- c

* o* \+ i2 ~' |/ v' k  ZQuestion: -
Can the enclosure of a Y1 capacitor be regarded as reinforced insulation?
& e1 V: p% s6 d) Q! B
Decision:
1 t& B( J' [! f" I; q( x5 r/ zThe enclosure of a Y1 capacitor is considered to comply with the requirements for reinforced insulation with the exception of the area near to the leads where the insulation becomes thinner.
3 Z2 s) S& O& [8 {7 A8 }$ V9 d$ r8 K
* G7 v6 X% E$ w6 o2 X* t) t2 W        Only the white area is to
) ]: {( Y4 R: G* m3 y        be considered as
        reinforced insulation
                                   

- o! F% A2 a& B. a7 }0 ?
" ?9 n$ t/ y; A, `0 U; D$ [( X

! M+ F# y1 M( g* J9 X! h5 h9 D# H( u
  f: q# Z; V& {+ z2 @


3 [& p' l" A! r% O, R

6 V& ~& x) D$ i9 J
3 Z6 R' b% T  \0 _0 wExplanatory notes:
-

7 o, O, g+ J8 {8 S# ~7 D. u" `4 \# z

oscar_ye

安规007 发表于 2011-5-3 14:58
  t, r- o# K2 ~+ z! RY电容表面是基本绝缘？ 那是不是意味着再包层热缩套管就可以当附加绝缘？ 人手就可以碰了？？我对此持怀疑态 ...

附加绝缘穿透有要求的，家电1mm。另外，电容外壳与带电体打过耐压，我认为是达到基本绝缘要求。如果想用热缩套管，那么热缩套管1层先需要打耐压，通过后做附加绝缘需要2层以上，也需要做试验。

aillafeng

元器件是否作为绝缘那样看元件

EVERGREEN21

http://www.iecee.org/ctl/osm_she ... s.html#en6095012001 里面有说明

lockintime

[s:83学习了

jianshen

只有Y,X电容是,其余不是

tomwellyang

学习了，学习了，谢谢1

aiduoxi

引用第5楼安规007于2011-05-03 14:58发表的  :
. i0 |) b  u4 f. \Y电容表面是基本绝缘？ 那是不是意味着再包层热缩套管就可以当附加绝缘？ 人手就可以碰了？？我对此持怀疑态度。

漆兄曾经貌似做过此类测试