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
' }6 U3 H  g0 D  q, a; Xinsulating sealing compound
Description mm
Creepage distance:
1 between live parts of different polarity
2 between live parts and
8 y% y: Y# ?) u– accessible surface of parts of insulating material
– earthed metal parts including parts of earthing circuit
– metal frames supporting the base of flush-type socket-outlets
– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
* O& g" X8 |0 S& M7 W: w– external assembly screws, other than screws which are on the engagement face of plugs and
3 h+ O# T5 w( J2 e% Pare isolated from the earthing circuit
4a
8 }0 Z7 Y- ]4 f# P3 M3
: S; A& R4 \( z6 k; D3 l6 P3
: T& ~, `, ~. M" g- |) K3
3
3
3 between pins of plugs and metal parts connected to them, when fully engaged, and a socketoutlet
/ K! O0 E* k3 rof the same system having accessible unearthed metal partsb, made according to the
most unfavourable constructionc
; D+ l! l5 P* }$ C6d
9 ]' |" g; B: w4 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
unfavourable constructionc
6d
* }% ^8 B" A3 s- Z5 between live parts of a socket-outlet (without a plug) or of a plug and their accessible unearthed
or functional earthed metal partsb
: H* `/ ?1 K6 O6d
1 u. M  d' _6 W5 ?7 {* IClearance:
6 between live parts of different polarity 3
% {9 {7 f( s; s% Z7 between live parts and
– accessible surface of parts of insulating material
1 w1 m! H/ e* j% T6 G3 ^  S. a" @8 D– 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
– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
$ H& N# L0 S( B! {. F& k– external assembly screws, other than screws which are on the engagement face of plugs and
  |  p5 }( P1 o6 H' f& a' y" iare isolated from the earthing circuit
2 h- h0 [, r  j9 X8 between live parts and
– exclusively earthed metal boxese with the socket-outlet in the most unfavourable position
$ H0 ^- g7 W/ C' j  s# C– unearthed metal boxes, without insulating lining with the socket-outlet in the most unfavourable
9 b, U' N0 H5 }position
: f" Z6 u9 g8 M– accessible unearthed or functional earthed metal partsb of socket-outlets and plugs
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
for surface mounting
" E$ {; \9 O5 h- F; U) p3
3
3
3
3
9 j; ~: ^- t3 n6 p3 Y0 x3
4,5
6
2 r5 Z. @7 J/ |. M  s5 [6
3
6 g* U" I7 ]* n: bDistance through insulating sealing compound:
11 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
$ H* Z* ]5 S3 e4 a9 G7 k( ]4 t12 between live parts covered with at least 2 mm of sealing compound and the bottom of any
conductor recess, if any, in the base of a socket-outlet for surface mounting
4a
6 O0 m6 U7 W$ c0 J6 c! j7 d) u2,5
5 n- T3 U9 ?* u: R: I1 ia 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, Q# n$ Q( Z4 u, \9 @e


, |; T7 X, E. N, u' ]) J
( K  l* w2 `6 u8 g4 g  T其中2 between live parts and screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
% ]4 |1 n8 x9 Q' h这句应该如何理解？
5 [3 n" T3 T) p7 d. F1 W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？
% o( B, b0 F% m* m) \4 v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。
- n( Z9 _, T" X; @. a0 U在这里想知道大家是如何看待这事的。
" S4 p" Q+ F) x! {7 r, K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，
6 g9 c0 N5 U  C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，
! y* I1 n; r% R% ?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；
, n+ Z! T6 G1 d$ V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。
) W5 c' w) b, l: C7 W3.14.10.1 General
Socket-outlets shall have degree of protection IP2X when installed in accordance with
manufacturer’s instructions, to the extent that this degree of protection shall cover access to
/ `* ~5 m: o6 ^- ilive parts and mounting screws for mounting brackets or wall boxes.
! m  Z6 w! D1 B: j' Y2 R
: K# f; A, \+ k+ |The degree of protection shall comply with the appropriate requirements of AS 60529.
( K* J( Y" F8 r; _! q5 ]6 I" NNOTES:
1 Degree of protection IP2X does not preclude higher degrees of protection.
" Y: e* y7 H% f! K' p2 The extent of the degree of protection IP2X is intended to cover a situation where a socketoutlet
. W" S9 l6 W) c0 C/ Imay be mounted to a bracket or enclosure which is not ‘earthed’.