DSH 642 Markings

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DSH 642 : o/ i0 Z1 {* O

Markings % F: }1 [" R- ]$ A

6.1.1 q)

61643-1(ed.2) 1 g, p5 @9 a* I1 T% A/ ?

Standard(s)-(year and edition):
& |6 K: U8 c. c) n; R' FIEC 61643-1, 2nd edition, 2005-03
5 S1 L: {5 @0 {/ kSub clause(s):
6.1.1 q)
7 r* _( \$ u( G! [. b0 qDSH 642
Subject:
- H5 R/ ?$ H& h6 {Markings
( T" b/ P; H- [) {% `Key words:
- marking
6 O4 ~, i8 a2 |- frequency
3 F8 g* p2 g, H8 W5 f$ ]) K, V: hApproved by the 45th CTL plenary meeting 2008
& \) F8 L5 V% p. }: g4 VQuestion:
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
7 @0 w( K( D% n# X9 gRationale:
- O' C/ U2 p6 c/ C; IThe standard itself limits to the frequency range of 48-62 Hz a.c.:
) J3 q, T" d% \* k% Y  l: G1 V2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.
The marking requirement in the English IEC version reads:
+ h0 t/ s" w  N9 K  a/ c6.1.1 q) Type of current: a.c. frequency or d.c., or both
7 p% m+ F$ q9 a3 ^, x- M9 z/ P) J) bThe marking requirement in the French IEC version reads:
  [1 {7 }' f6 |6.1.1 q) Le type de courant: alternatif, continu ou les deux
4 f1 h2 u' h% l4 \This means only the English IEC version requires to mark the frequency.
Decision:
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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