DSH 642 Markings

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DSH 642 $ ~3 ^& u5 j+ d- q( z" `" V2 e

Markings 7 f% b- ]( `, s# x* N0 e$ w

6.1.1 q)

61643-1(ed.2) 4 R' u7 b( T: B" I3 U5 m( i" X

% M" \: Q  t  m: t- rStandard(s)-(year and edition):
; L5 }" J- ~/ X% E0 r4 h$ uIEC 61643-1, 2nd edition, 2005-03
Sub clause(s):
3 ]9 w% v: L. l0 E5 @+ O9 x6.1.1 q)
) f: y  G: v& o* EDSH 642
Subject:
& i- h2 s9 q# }. t8 ]( g: {3 t8 HMarkings
Key words:
: A) l7 {' D/ n$ q4 y0 l, k- marking
- frequency
* p% {; V! q4 O3 |2 L$ v; I* u  LApproved by the 45th CTL plenary meeting 2008
Question:
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
Rationale:
The standard itself limits to the frequency range of 48-62 Hz a.c.:
2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.
3 h+ u4 Z( J1 r$ zThe marking requirement in the English IEC version reads:
9 I* w/ ?# Y# a7 Z3 N6.1.1 q) Type of current: a.c. frequency or d.c., or both
The marking requirement in the French IEC version reads:
+ s9 b& |3 A" D4 F2 r" ~6.1.1 q) Le type de courant: alternatif, continu ou les deux
) ]- i  v# l1 K$ xThis means only the English IEC version requires to mark the frequency.
2 n6 ~$ W# a8 R+ _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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