DSH 642 Markings

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DSH 642 / D' b1 V% }5 V; J

Markings & ]9 {& k/ C) i2 g$ l; b

6.1.1 q)

61643-1(ed.2)

! o' W' X- n" V& C5 P; Y7 d8 Q( QStandard(s)-(year and edition):
: N/ d5 F6 ^' kIEC 61643-1, 2nd edition, 2005-03
+ i, p, ?8 m1 HSub clause(s):
& j0 r" q- U3 x4 Y2 g4 s1 F6.1.1 q)
DSH 642
6 ]3 [( z7 A' D% DSubject:
" L$ A! n' ~( H1 H7 \5 G" VMarkings
Key words:
- marking
- frequency
( n4 o7 y: D' x2 mApproved 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.
9 M" n5 F; d! ?8 |, @, L" c% wThe marking requirement in the English IEC version reads:
' X$ q# Z! ?5 i$ Q2 H6 C" w6.1.1 q) Type of current: a.c. frequency or d.c., or both
5 G4 i/ _, R% ^The marking requirement in the French IEC version reads:
6.1.1 q) Le type de courant: alternatif, continu ou les deux
3 B/ {% c6 ~7 y; g/ KThis means only the English IEC version requires to mark the frequency.
$ L1 q+ X& Q- Y5 L) |9 X- zDecision:
6 L% u3 E2 \  [/ JYES, 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.