DSH 642 Markings

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DSH 642 + Q/ K# R  I6 y. B" i 6 @+ k7 g8 l9 @, i$ H

Markings

6.1.1 q)

61643-1(ed.2)

Standard(s)-(year and edition):
IEC 61643-1, 2nd edition, 2005-03
# ^- e' a8 R" `5 K5 c( r0 F7 bSub clause(s):
6.1.1 q)
! \+ P+ m' K) d! j: V, ]$ qDSH 642
! r. d' {' {- @+ N5 k6 eSubject:
Markings
8 C: ]6 ~8 Z- J+ A7 |Key words:
! ~. K! k* C, \! K7 s  q5 i- marking
! J' C/ {! ^( Z* Q3 U- frequency
Approved by the 45th CTL plenary meeting 2008
$ e  C2 {# `* p- D" `6 y3 z% VQuestion:
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
Rationale:
5 l' c% k( t$ |) YThe standard itself limits to the frequency range of 48-62 Hz a.c.:
* E+ i- ^; f7 _! ?2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.
+ p: r3 Y9 l9 y0 _The marking requirement in the English IEC version reads:
# j, [7 X* o; l7 N  k6.1.1 q) Type of current: a.c. frequency or d.c., or both
9 o; {: n& Y1 IThe marking requirement in the French IEC version reads:
6.1.1 q) Le type de courant: alternatif, continu ou les deux
+ Y- C# F. s  h) v  x+ l6 c; _1 wThis means only the English IEC version requires to mark the frequency.
$ Z7 t' H$ j% |( F4 M8 IDecision:
YES, 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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