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
" _$ p. V( E- |$ Jinsulating sealing compound
Description mm
Creepage distance:
  z3 c% B& f/ a9 @1 between live parts of different polarity
* x7 a# X  N5 y" ^2 between live parts and
– accessible surface of parts of insulating material
+ K5 M; a  U& k5 d2 T2 \" j– earthed metal parts including parts of earthing circuit
– metal frames supporting the base of flush-type socket-outlets
6 T- q* R* [+ {' E! p" F– 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
4a
% F: X9 ^3 o6 e/ p" d3 h3
( F5 P8 Q5 [$ m% {% O3
3
3
3
+ S4 K2 X8 q) a" B3 between pins of plugs and metal parts connected to them, when fully engaged, and a socketoutlet
% h8 o; T! w# L* l" {' Aof the same system having accessible unearthed metal partsb, made according to the
$ Y  {6 U( _" I( H+ h9 Jmost unfavourable constructionc
6d
1 l( |7 f; T& C5 y+ \0 s4 between the accessible unearthed metal partsb of a socket-outlet and a fully engaged plug of
2 T  s6 R9 b  h; n! Nthe same system having pins and metal parts connected to them made according to the most
3 a$ l. ?2 E; Aunfavourable constructionc
( x. K+ B5 `8 o) A% K2 d6d
4 D+ V  w* I* s2 s5 between live parts of a socket-outlet (without a plug) or of a plug and their accessible unearthed
or functional earthed metal partsb
) L+ i7 i, a8 }7 W6d
Clearance:
6 between live parts of different polarity 3
! G/ F5 t" z7 ?3 G* h4 u7 between live parts and
– 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
– 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
$ A7 \6 N2 F' }2 m' ?3 p9 q) U7 sare isolated from the earthing circuit
8 between live parts and
– exclusively earthed metal boxese with the socket-outlet in the most unfavourable position
7 i: R5 t+ k. k$ z8 p  e2 r– unearthed metal boxes, without insulating lining with the socket-outlet in the most unfavourable
! }/ v1 y$ m$ F% A1 |position
- [, O+ C4 N$ ^1 [* X– accessible unearthed or functional earthed metal partsb of socket-outlets and plugs
, [7 T: ?9 v) k! y1 M9 between live parts and the surfaces on which the base of a socket-outlet for surface mounting is
" U& b, z! h  y( e8 pmounted
) s" k9 b9 z; B6 e$ C5 B0 f10 between live parts and the bottom of any conductor recess, if any, in the base of a socket-outlet
, _$ ?6 k6 N( A* t! A# ~for surface mounting
3
3
3
3
3
3
4,5
6
8 v3 T9 Q5 \' S* |2 D6 R6
5 a" O- W! ]- L0 L. U5 p3
Distance through insulating sealing compound:
9 d' x  @: G# B11 between live parts covered with at least 2 mm of sealing compound and the surface on which
+ v+ o* L9 g) M) Xthe base of a socket-outlet for surface mounting is mounted
12 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
4 b3 m" v0 l7 f6 ~& n& e4a
) _- |2 s4 i7 {' ]$ r2,5
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.
6 \8 I5 `& F; m( Z& Ac The most unfavourable construction may be checked by means of a gauge which is based on the standard
% V- o8 V( J+ m# O% X2 R! Bsheets relevant to the system concerned.
* ~( a$ v6 z  B6 F8 Td This value is reduced to 4,5 mm for accessories having a rated voltage up to and including 250 V.
- u9 B5 z' f' A/ t  Se



其中2 between live parts and screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
这句应该如何理解？
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？
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。

孟云房

我觉得是要考虑的。
, `. j4 o8 B2 Y8 j  z对固定固定式插座的底座、盖或盖板的螺钉或其它装置，
9 u3 G- r3 I8 t4 ?% v盖或盖板的固定螺钉一般在外部了，通常可触及，需考核，
; m) E9 T  h% `; {% }对固定底座的螺钉，虽然在内部，
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；
  @# v9 u# F( 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
Socket-outlets shall have degree of protection IP2X when installed in accordance with
2 Y$ Q* n  H% D" O9 p  Ymanufacturer’s instructions, to the extent that this degree of protection shall cover access to
9 F5 T, ~' T. x" e0 c9 Alive parts and mounting screws for mounting brackets or wall boxes.
/ C' m! O- z8 o; U& i
9 Y- g! {6 z) T1 L8 iThe degree of protection shall comply with the appropriate requirements of AS 60529.
: U) [9 A2 s: TNOTES:
1 V' k. G5 k& t9 o" N5 a1 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’.

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。
在这里想知道大家是如何看待这事的。
希望大家谈谈自己的看法。

jiejie

英文东东看不懂