DSH 642 Markings

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DSH 642

Markings & q2 e! @5 ~1 `# y8 ^( ?" s

6.1.1 q) " `6 \( B2 w7 V4 l6 W

61643-1(ed.2) 3 A% w5 Z9 J, b& k3 X3 m

7 f1 N3 _8 A; Y2 b5 N# cStandard(s)-(year and edition):
% E/ Y4 R% d& ]8 L2 B% j, s% C( RIEC 61643-1, 2nd edition, 2005-03
& C! j. _$ v1 VSub clause(s):
6.1.1 q)
DSH 642
( [+ Q2 n5 B' ]Subject:
7 ]: Z  x9 t7 l7 VMarkings
! Y7 l/ W+ `( L# ^9 A* x" `Key words:
# a5 Q, g% A( a" o6 z- marking
- frequency
' A9 t9 _3 Q$ W* fApproved 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.:
7 k! l% M4 B( ]. I  k2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.
The marking requirement in the English IEC version reads:
6.1.1 q) Type of current: a.c. frequency or d.c., or both
The marking requirement in the French IEC version reads:
& E# ^5 G" ^, p$ {6.1.1 q) Le type de courant: alternatif, continu ou les deux
4 y9 k! _4 i) h8 q: ~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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