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|  DSH 6426 T# H* D. P- p8 ^- T7 \4 Z
, \! M6 @ d2 L0 O; i* D
| Markings$ f; y! [8 u0 g; c$ N4 {& {5 _
| 6.1.1 q)6 h8 K* s+ z& f; x, k1 F) q
| 61643-1(ed.2)
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Standard(s)-(year and edition):
" [6 a3 f; g9 W8 g- t0 b9 lIEC 61643-1, 2nd edition, 2005-03
) Y! M% W1 J) U' cSub clause(s):
+ c4 V7 v" x. a% y2 s5 ~! O6.1.1 q)2 W' R5 I" z; i# }7 W) ~ k# R
DSH 642
* b3 X4 I+ o- O+ kSubject:
( g2 g" G; Z0 _& R( m0 h& S% P8 qMarkings, W% \% ]. W& i- p% V
Key words:/ ?7 [) C, r; l6 b" f
- marking
' c* z+ z* r. f: @& |6 q7 O- frequency- e, E% d% V/ D; S' |4 P
Approved by the 45th CTL plenary meeting 2008& n% B% I" p- m& h: z
Question:
8 |+ |/ u$ I2 C- A. W, XIs it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?* ]" |* `8 m: t; n+ }3 b0 U
Rationale:6 { r! t1 t) ?/ ^1 O) |
The standard itself limits to the frequency range of 48-62 Hz a.c.:
2 e2 x0 P; X8 \2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.! `3 y$ e8 n! {9 T J
The marking requirement in the English IEC version reads:
8 P3 t& D3 E1 t! s. g1 {6.1.1 q) Type of current: a.c. frequency or d.c., or both/ j/ f/ l- W a) J3 M
The marking requirement in the French IEC version reads:
+ Y, v1 P& n9 w! k6.1.1 q) Le type de courant: alternatif, continu ou les deux" Z$ D) B! w, `$ H* {) E5 ^7 h
This means only the English IEC version requires to mark the frequency.$ N+ U8 \, R* N4 B0 h0 {2 @
Decision:
?) k% Q- I5 E& k% MYES, it is acceptable to mark only the type of current (e.g. a.c. or ~) without giving the frequency, as the frequency is limited to the range of 48-62 Hz anyway and there is no safety implication.
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发表于 2012-11-7 19:15
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