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Table 23 – Creepage distances, clearances and distances through
. A2 T( W3 T u/ |insulating sealing compound+ R) {& u; e% g- w# u+ o r$ ~
Description mm
( Z5 ~/ K! u% d0 W8 S) mCreepage distance:/ |$ ^' _/ o- w6 b' \; e0 a
1 between live parts of different polarity# h! B* M( R0 n- k+ f
2 between live parts and
! \) V/ r: h7 J& |7 {0 v– accessible surface of parts of insulating material
/ T) i9 e) Y9 D– earthed metal parts including parts of earthing circuit/ T* g* V# x2 _* E( }
– metal frames supporting the base of flush-type socket-outlets
8 b8 I' @$ w! l8 G$ ?4 r– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets' f" V) {: m* |" }# O
– external assembly screws, other than screws which are on the engagement face of plugs and* {& ?. [# _2 s: o' {7 c1 h
are isolated from the earthing circuit2 o/ Z; F. d$ o+ K- X2 q; r
4a
1 o/ i4 K) K3 k7 H& U# j3& _. s8 t c- X
3
: l( z* X; i& l. L3' c: Y5 a! p ~- d" {, q3 d
3
. Z, i. {* f0 x+ H. k* |3
2 Z: f% }3 e1 `3 between pins of plugs and metal parts connected to them, when fully engaged, and a socketoutlet+ B4 f+ T) f8 e. ^
of the same system having accessible unearthed metal partsb, made according to the* H. f' I a2 k, e2 U& p
most unfavourable constructionc
" U0 m1 O/ K; p- r1 K8 H6d: ^5 _$ G/ b& D; V$ I
4 between the accessible unearthed metal partsb of a socket-outlet and a fully engaged plug of
9 }% u4 o/ I* S- T' S: @. ~the same system having pins and metal parts connected to them made according to the most
2 n7 i2 b0 R G3 A8 |+ Uunfavourable constructionc
" Q ~, q& j$ W# i. \6d) O& K. h- n9 I a
5 between live parts of a socket-outlet (without a plug) or of a plug and their accessible unearthed! y# g5 u, Q1 i: g
or functional earthed metal partsb
; Z$ b1 g* o U9 z6d
: T" v1 ]+ {1 A) h' P( Y5 P- p: ^Clearance:5 T8 L' [" u8 _: S
6 between live parts of different polarity 3; H$ I. _+ ^ }2 Q; v6 z& ?
7 between live parts and& H( I: t* ~, D
– accessible surface of parts of insulating material( c% T. a0 G( s1 @7 v0 W1 n
– earthed metal parts not mentioned under items 8 and 9 including parts of earthing circuit,
. h* D+ o, W4 g, u8 N4 O# `3 F– metal frames supporting the base of flush-type socket-outlets5 I7 Q4 F( o5 U* o! }( z
– screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets
4 y& L1 F* y: k9 f, G+ T– external assembly screws, other than screws which are on the engagement face of plugs and
8 \2 P+ ~" A \- F* o+ v- p! ^are isolated from the earthing circuit
+ E$ @1 j5 Z/ J8 between live parts and
& i( X1 z m! d9 D# n7 h" ^– exclusively earthed metal boxese with the socket-outlet in the most unfavourable position
" n7 K, i& A# V: r+ B– unearthed metal boxes, without insulating lining with the socket-outlet in the most unfavourable
% p; ]3 m+ Z3 y% b3 W j8 T, jposition
H# |9 j! M; L4 K( B/ }– accessible unearthed or functional earthed metal partsb of socket-outlets and plugs) b' E6 d2 _- f) ]3 \
9 between live parts and the surfaces on which the base of a socket-outlet for surface mounting is2 u* w8 Q- T3 m, P9 E
mounted4 w' H- C+ M3 x, a1 h0 c% `" K* ^4 N7 e
10 between live parts and the bottom of any conductor recess, if any, in the base of a socket-outlet
5 x2 q. ~1 S) k4 [, hfor surface mounting
9 i6 L4 P- W8 { w30 `6 C: k! V0 |+ w6 X. D w2 P
31 q" A' g# ^& _- N! k) y) ?! [9 i9 ~
3
' T! Z8 J& y1 S" i4 \3* {9 Y, B- Q- e! w
37 g; [" J* O. x2 H: J! {/ m S
35 L! B; Q/ x0 Y2 y: Y6 x
4,5; K# \+ C7 R! q+ m6 g. n6 P
65 h# g0 ~: z- S* y4 t+ |
6
7 O3 F. ~- K7 Q; `! F0 ^+ ~3$ B4 F& M2 }$ F3 R8 D
Distance through insulating sealing compound:3 X* k6 x! [) |% k
11 between live parts covered with at least 2 mm of sealing compound and the surface on which4 O, @" P% o3 h$ q
the base of a socket-outlet for surface mounting is mounted
5 L' J8 u* m) S; w12 between live parts covered with at least 2 mm of sealing compound and the bottom of any% l# G/ p( \6 J, X& D
conductor recess, if any, in the base of a socket-outlet for surface mounting0 O4 O- W2 W; B, |9 ]. T
4a
' M: M. v8 a9 o, h4 p2,5
- |6 v. W. e/ |. E5 ja This value is reduced to 3 mm for accessories having a rated voltage up to and including 250 V.
3 f- F. ]7 k2 n& w8 K/ cb With exception of screws and the like.2 E+ |. ~8 R/ E( F: {7 S0 L7 u
c The most unfavourable construction may be checked by means of a gauge which is based on the standard* E V) ?( T' _8 H1 o
sheets relevant to the system concerned.
* U2 ^* O T8 W! |4 J( Gd This value is reduced to 4,5 mm for accessories having a rated voltage up to and including 250 V.3 N9 e6 B6 N$ T( Y* I) @; H
e: w1 L% p" D- {
; |% \+ {! D* i3 k7 I
7 F' M5 ^4 _1 T2 E
. h0 \7 P$ [7 P& Q其中2 between live parts and screws or devices for fixing bases, covers or cover-plates of fixed socket-outlets, K" _8 m$ }! s3 ?) Y/ v( z
这句应该如何理解?; Z. z6 ^$ N, Q! ]
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?
5 N9 ~( I$ b& @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。 |
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