有关IEC60884－1中电气间隙与爬电距离的规定

johnmark

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Table 23 – Creepage distances, clearances and distances through
) {1 r: P7 P/ m7 o+ Ainsulating sealing compound
Description mm
Creepage distance:
# M9 M6 H# P' o) H4 c3 \. r  d% }$ G1 between live parts of different polarity
2 between live parts and
# n6 {: p4 [! Q. g/ f– accessible surface of parts of insulating material
: Q1 y$ _8 l3 e3 M/ G1 L– earthed metal parts including parts of earthing circuit
( ?) J! f: T, R+ a+ k- ]5 o– metal frames supporting the base of flush-type socket-outlets
– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
– external assembly screws, other than screws which are on the engagement face of plugs and
are isolated from the earthing circuit
& ~6 b8 ^) S1 n, R2 }4 ^7 D: \4a
3
: H1 L4 u; C: t7 C  a3
3
1 e& X0 O7 L! q7 X$ d3 o3
3
% ^& R; `4 u9 f" d/ B( L: b' x, D0 I3 between pins of plugs and metal parts connected to them, when fully engaged, and a socketoutlet
( H' X8 W( D9 U( Y* i6 u/ cof the same system having accessible unearthed metal partsb, made according to the
& q4 P8 E# F! l; |: g1 I! g  Umost unfavourable constructionc
6d
6 T7 C+ w2 _9 [) s3 C' A$ E4 between the accessible unearthed metal partsb of a socket-outlet and a fully engaged plug of
the same system having pins and metal parts connected to them made according to the most
. F0 w. U: ?6 iunfavourable constructionc
6d
5 between live parts of a socket-outlet (without a plug) or of a plug and their accessible unearthed
or functional earthed metal partsb
6d
) D7 k" R& t  r; C- {1 UClearance:
% K- W. K4 {6 [# d/ u$ l6 between live parts of different polarity 3
7 between live parts and
" H( j% @9 a8 F5 r1 M0 u3 x. V– accessible surface of parts of insulating material
– earthed metal parts not mentioned under items 8 and 9 including parts of earthing circuit,
– metal frames supporting the base of flush-type socket-outlets
' b$ D, F5 |5 P– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
; b; k. o% w* g1 D4 X3 @– external assembly screws, other than screws which are on the engagement face of plugs and
4 {3 F3 J" y$ g$ y- c9 O5 Zare isolated from the earthing circuit
. a$ v/ m$ F+ ~8 between live parts and
0 {2 s: }; t% ]. u9 n% @– exclusively earthed metal boxese with the socket-outlet in the most unfavourable position
; _$ y: a2 T  i" S/ Z7 W– unearthed metal boxes, without insulating lining with the socket-outlet in the most unfavourable
position
– accessible unearthed or functional earthed metal partsb of socket-outlets and plugs
3 J5 W+ z& r! O9 n3 g" k6 h6 _9 between live parts and the surfaces on which the base of a socket-outlet for surface mounting is
mounted
10 between live parts and the bottom of any conductor recess, if any, in the base of a socket-outlet
& O0 D6 N* O. ?4 e. c5 J' F' w) ufor surface mounting
3
3
3
. K* Y: G7 ]9 x  J! l5 {  w% ]3
6 Z6 d7 v4 _* c- p3
3
4,5
6
6
3 y5 T7 M2 W6 A3 z3
8 W2 s2 H* `/ r9 U3 G7 RDistance through insulating sealing compound:
7 y; N& U, y2 X11 between live parts covered with at least 2 mm of sealing compound and the surface on which
the base of a socket-outlet for surface mounting is mounted
7 Y5 e" U: J/ s12 between live parts covered with at least 2 mm of sealing compound and the bottom of any
* H- v( R. X; ^6 k& Vconductor recess, if any, in the base of a socket-outlet for surface mounting
! X1 m# p, d! c/ k7 w4a
2,5
a This value is reduced to 3 mm for accessories having a rated voltage up to and including 250 V.
b With exception of screws and the like.
c The most unfavourable construction may be checked by means of a gauge which is based on the standard
sheets relevant to the system concerned.
d This value is reduced to 4,5 mm for accessories having a rated voltage up to and including 250 V.
e

* X7 y" r: G' r

其中2 between live parts and screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
/ V! k; {$ Y& Q" |- i( |- p这句应该如何理解？
/ n- O( `) n) [- ^6 c如果螺钉是在产品内部，在外部无论如何也是接触不到的，也要满足此要求吗？
  i5 \5 }; }* {' p2 P比如此螺丝在内部固定产品的装饰部分，外壳的固定采用的是可以满足此要求的。

jiejie

英文东东看不懂

johnmark

这个问题以前向一位同事询问过，同事建议说可以将此螺丝当作导电体的一部分，如果不有影响的话就不会有问题。
我个人觉得这种说法很对，但IEC　60884－1中有这样的规定，如果这样做万一认证公司判为不合格就麻烦了，所以不敢这样做。
. j1 q- w: X7 C% p& I在这里想知道大家是如何看待这事的。
9 D  k, t7 H9 h$ }1 I希望大家谈谈自己的看法。

孟云房

我觉得是要考虑的。
对固定固定式插座的底座、盖或盖板的螺钉或其它装置，
4 G% d# G( H$ h* \: N' w8 I" {盖或盖板的固定螺钉一般在外部了，通常可触及，需考核，
对固定底座的螺钉，虽然在内部，
! v$ F$ a& p6 N0 J" b( l5 e% N6 s如果参照AS/NZS 3112注2的说法，有可能把底座固定到一未接地金属上，
而这个金属可能是可触及的，
虽然在内部，还是需要考核的；
- K9 h0 m4 T1 j  z; g) B( A比如此螺丝在内部固定产品的装饰部分，外壳的固定采用的是可以满足此要求的，这个应该不要求了吧。
3.14.10.1 General
. `0 T5 x$ I) J8 z1 q* jSocket-outlets shall have degree of protection IP2X when installed in accordance with
' M5 G1 M% S# n8 q( Q. N  f5 Mmanufacturer’s instructions, to the extent that this degree of protection shall cover access to
. _7 p- m% d( G- N9 y6 |% ~live parts and mounting screws for mounting brackets or wall boxes.

The degree of protection shall comply with the appropriate requirements of AS 60529.
: A& M% t8 g7 L2 W; K5 uNOTES:
1 Degree of protection IP2X does not preclude higher degrees of protection.
2 The extent of the degree of protection IP2X is intended to cover a situation where a socketoutlet
may be mounted to a bracket or enclosure which is not ‘earthed’.