DSH 642 Markings

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DSH 642 3 M7 n7 j6 C+ |' D0 L5 i

Markings # A' D" G' m0 ?

6.1.1 q) ' ^3 U9 a9 u9 m; V+ T/ I

61643-1(ed.2) " v; B. p+ t2 p" O

Standard(s)-(year and edition):
! h8 L5 g) v/ u, h, aIEC 61643-1, 2nd edition, 2005-03
Sub clause(s):
6.1.1 q)
: f" M5 _% W  W  l, FDSH 642
Subject:
Markings
Key words:
- marking
- frequency
. b6 ^, ]0 F9 y- FApproved by the 45th CTL plenary meeting 2008
4 p: t) [* O- NQuestion:
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
2 S2 a1 ~$ x/ a- x; ?  GRationale:
The standard itself limits to the frequency range of 48-62 Hz a.c.:
8 K* J8 A8 |. O. K/ O: t2 x2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.
# c0 @. D3 l$ p7 k6 Z8 W: v. dThe marking requirement in the English IEC version reads:
$ x' s+ _+ C$ [6.1.1 q) Type of current: a.c. frequency or d.c., or both
The marking requirement in the French IEC version reads:
1 T; ^! |/ ]- K( j6.1.1 q) Le type de courant: alternatif, continu ou les deux
  X; z' Y* C$ O. v2 i1 CThis means only the English IEC version requires to mark the frequency.
5 T, _! N" m. o2 l$ f( L/ w+ QDecision:
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.