DSH 642 Markings

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DSH 642 4 i% H* k  I& G/ Z" Z4 f9 s

Markings 5 }1 }% w6 K% }1 u7 m7 q( v* j) ]

6.1.1 q) 4 i3 P3 S0 T' C& @

61643-1(ed.2) 8 N8 L; }1 a9 d/ {4 C

% e: b, K9 e, d# TStandard(s)-(year and edition):
. I& F( J! w8 ^! G8 [0 H; s$ zIEC 61643-1, 2nd edition, 2005-03
Sub clause(s):
6.1.1 q)
DSH 642
Subject:
, z8 h- r& S3 bMarkings
Key words:
- marking
- frequency
Approved by the 45th CTL plenary meeting 2008
1 I0 Y' _' ^! G/ ]4 d4 }: u! UQuestion:
" m0 L% o5 p, f. j# U0 a" p0 hIs it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
9 s/ m6 Y4 Z" P0 mRationale:
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.
The marking requirement in the English IEC version reads:
6.1.1 q) Type of current: a.c. frequency or d.c., or both
. m0 @! ]& U' DThe marking requirement in the French IEC version reads:
6.1.1 q) Le type de courant: alternatif, continu ou les deux
This means only the English IEC version requires to mark the frequency.
+ J* p/ Q4 f, p7 P# Y" LDecision:
$ N* c% q+ ^. Z% H* G) H) rYES, 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.