标题: 有关IEC60884－1中电气间隙与爬电距离的规定 [打印本页] 作者: johnmark 时间: 2009-9-24 00:45 标题: 有关IEC60884－1中电气间隙与爬电距离的规定 Table 23 – Creepage distances, clearances and distances through4 o! O6 y$ p* V1 Z; U
insulating sealing compound ; K7 w$ t; p0 [/ c# u: qDescription mm ! E& J' N1 K3 G+ [Creepage distance: 7 w, `( T& i% t2 Y1 between live parts of different polarity8 j0 k9 z* _; i8 ~( k( x
2 between live parts and - L8 L: ^; B) R– accessible surface of parts of insulating material 8 `/ K& e- Q( ]8 O– earthed metal parts including parts of earthing circuit: V( \( w9 w) i1 d* F9 R' U8 W
– metal frames supporting the base of flush-type socket-outlets $ H+ j: l. p ?5 _4 l– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets + C- j- G. v" D$ j; m– external assembly screws, other than screws which are on the engagement face of plugs and $ }3 V3 L) ?# l7 u$ mare isolated from the earthing circuit 9 h8 \# S/ F, z; N7 W4a: j( R3 x; z) d d
3+ z; U/ B$ r: p9 h4 S
3 C/ c3 L- C) b1 r) c: D3 0 K" w7 P2 v8 _. R" [3# D K( q% w+ O1 F( Z( Y. n. R
3 ; }. ]5 _( ]% \3 between pins of plugs and metal parts connected to them, when fully engaged, and a socketoutlet ; T! [3 a9 W' U: Qof the same system having accessible unearthed metal partsb, made according to the ! g9 p$ `; _8 U; \most unfavourable constructionc , M! ]- [( ~3 v) y, Z( S/ P' o6d' S/ q' h, ?" t9 t' e
4 between the accessible unearthed metal partsb of a socket-outlet and a fully engaged plug of , f: |% r4 N( C) r; n* \8 _the same system having pins and metal parts connected to them made according to the most 4 R# N4 K) N9 X( m7 u* A# sunfavourable constructionc ( |( n# z( ?0 Q" m. D/ v6d, H1 ^, p3 j' ]3 q
5 between live parts of a socket-outlet (without a plug) or of a plug and their accessible unearthed% k, @9 q9 _5 S
or functional earthed metal partsb 7 g( X7 v) H9 `- { y6d( d( U' s Z% x% j
Clearance: % I: q9 e! |5 k% ]6 between live parts of different polarity 38 `# W m5 O; q. @) m' @
7 between live parts and) C/ c2 u: X) q% q8 |* x
– accessible surface of parts of insulating material 3 n7 Z7 s2 }+ D5 c, q4 L& E– earthed metal parts not mentioned under items 8 and 9 including parts of earthing circuit, ' B- @( `- U- N" w! v– metal frames supporting the base of flush-type socket-outlets . u$ r& [ s' A& a– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets 3 W+ C) ^* t9 @2 ]3 }" e– external assembly screws, other than screws which are on the engagement face of plugs and 5 W8 s& g" r# Q" O, |; `& ^2 Dare isolated from the earthing circuit : M2 C! D$ E) W9 ]$ G6 B; [0 Y$ @3 r8 between live parts and' J" Q. P% B+ M4 y- t0 N
– exclusively earthed metal boxese with the socket-outlet in the most unfavourable position + M, z8 R1 _1 j/ i; i R– unearthed metal boxes, without insulating lining with the socket-outlet in the most unfavourable P& O. M7 ^) i7 O" c* r
position 3 f; e& F. F8 e" r7 g– accessible unearthed or functional earthed metal partsb of socket-outlets and plugs p( Q) {6 o0 E% f u9 between live parts and the surfaces on which the base of a socket-outlet for surface mounting is( L- G4 R1 [7 S
mounted 2 M2 @/ Q. g; p10 between live parts and the bottom of any conductor recess, if any, in the base of a socket-outlet- E7 V$ n! ?5 [) c
for surface mounting 6 l8 |- U$ D/ {% j3 ( ]: _$ a# l0 `$ \3 T36 t9 X0 `4 I' s. v
3; Y% P0 Z6 l3 I/ s
3 3 Y6 n; d& N2 Y) q }5 h31 A: W) ?& z* v% D( G
3 3 N2 k x& c. D6 x% O$ ~4,5. n' y6 k5 w3 S) j
6% a: y' i$ k" E
6% l( ?2 c+ \) W8 y
38 f" A8 ?- H3 P+ s* w
Distance through insulating sealing compound:0 T' x* J* X. ^ ?8 v" ~
11 between live parts covered with at least 2 mm of sealing compound and the surface on which ' \- i+ m3 _; W; c2 x4 bthe base of a socket-outlet for surface mounting is mounted0 B0 T* G9 g( Y/ H4 R- P
12 between live parts covered with at least 2 mm of sealing compound and the bottom of any3 C4 s G/ m* V
conductor recess, if any, in the base of a socket-outlet for surface mounting - E6 u- Y( ^' ^. o) g( o' {4a) ^4 c! w0 B' M( m
2,5 % n8 K9 S* @2 S' N+ H+ ^a This value is reduced to 3 mm for accessories having a rated voltage up to and including 250 V./ [, n, R! v7 |) {: v; {. s4 M
b With exception of screws and the like.) R/ u' z- T9 S1 O
c The most unfavourable construction may be checked by means of a gauge which is based on the standard: u% A6 O3 B% R5 b7 o
sheets relevant to the system concerned. 7 |& e3 R7 |' S9 m6 {$ L0 id This value is reduced to 4,5 mm for accessories having a rated voltage up to and including 250 V. ; m4 [) x6 Q1 \) b# ^e1 W6 }' J. P, C9 u% E+ \+ @
+ m3 u( M; G. d/ z$ C7 A! } $ n" j; d A2 L. H0 I/ b( Z, ]& D$ t6 o5 k
其中2 between live parts and screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets . D0 k% t+ t% B$ M% `$ O- r: m. D* y这句应该如何理解？8 a- i. G$ u2 Q7 F
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？9 x+ K+ m9 N+ x1 t4 E1 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。作者: 孟云房 时间: 2009-9-24 23:25
我觉得是要考虑的。8 a- k3 F8 d( ?# f
对固定固定式插座的底座、盖或盖板的螺钉或其它装置，. a3 c+ b/ }5 ^0 U7 F: N0 h
盖或盖板的固定螺钉一般在外部了，通常可触及，需考核，+ K3 X3 q$ b( A6 c. T6 h k3 o
对固定底座的螺钉，虽然在内部， 4 a; d( E# N. S8 e( M$ J/ T" F2 T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，8 a8 M3 N4 o: O9 o/ N
而这个金属可能是可触及的，2 c3 d1 m+ O p5 F
虽然在内部，还是需要考核的； + P# r" h9 k( L0 F3 C( 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，这个应该不要求了吧。 ( Z4 d: X s) N$ w) I; Z3 o! f3.14.10.1 General" q: `6 f3 m: c
Socket-outlets shall have degree of protection IP2X when installed in accordance with ' r9 L% M0 h3 Ymanufacturer’s instructions, to the extent that this degree of protection shall cover access to ! {( v8 O' ]& Y1 e$ q4 [6 U1 j4 vlive parts and mounting screws for mounting brackets or wall boxes. , C" r1 Q j, E& ~6 P p* V5 i+ M. X) v: l' g
The degree of protection shall comply with the appropriate requirements of AS 60529.( ?" ~2 {/ s/ D8 ]% v
NOTES: [5 j* l7 c# ~/ R4 R, B2 B1 Degree of protection IP2X does not preclude higher degrees of protection. L" h( v' l6 ]$ O1 x% i" F: u2 The extent of the degree of protection IP2X is intended to cover a situation where a socketoutlet# Z, \8 O5 _7 N& j+ n
may be mounted to a bracket or enclosure which is not ‘earthed’.作者: johnmark 时间: 2009-9-25 17:27
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。% b! g& d1 R6 F5 }9 f* s
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。 4 _1 W) D- q; D' b8 J8 D' }在这里想知道大家是如何看待这事的。, d/ h2 x/ o3 Q u
希望大家谈谈自己的看法。作者: jiejie 时间: 2010-7-3 10:09
英文东东看不懂