DSH 642 Markings

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DSH 642 % M! Y" `" r9 V( ` # L0 q7 c9 G. O5 m  ?3 B3 c/ c* A

Markings

6.1.1 q)

61643-1(ed.2) 0 |) H; Q0 @: Z3 ^& W& x

Standard(s)-(year and edition):
$ b$ [( s+ d, y/ N& HIEC 61643-1, 2nd edition, 2005-03
Sub clause(s):
6.1.1 q)
DSH 642
4 n3 k# h/ B8 U8 |Subject:
( r& W$ z5 G3 Y; sMarkings
+ Y/ K1 l" B- wKey words:
+ @3 K9 f3 ?" `- marking
1 ?" T% g" Y6 Q8 v3 X& @2 n- frequency
3 t$ a$ X: t8 h  E' F9 y+ y/ v2 tApproved by the 45th CTL plenary meeting 2008
) [. U+ l8 T/ o" cQuestion:
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
4 b5 o1 j. {5 y3 z# y/ i, D( mRationale:
. j3 V9 _% w6 I$ |/ e( A) xThe 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.
% s5 r2 ?( Q4 Z6 P3 D% j/ \The marking requirement in the English IEC version reads:
6.1.1 q) Type of current: a.c. frequency or d.c., or both
2 X) U: F4 u' \4 t6 i# GThe marking requirement in the French IEC version reads:
% g/ o5 U% a- l4 \1 L6.1.1 q) Le type de courant: alternatif, continu ou les deux
This means only the English IEC version requires to mark the frequency.
Decision:
8 r, E& W, u% j) ]& T. @9 C" cYES, 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.