DSH 642 Markings

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DSH 642

Markings

6.1.1 q)

61643-1(ed.2) , S# g4 _. I0 `

, ^* r4 [. y$ NStandard(s)-(year and edition):
IEC 61643-1, 2nd edition, 2005-03
Sub clause(s):
6.1.1 q)
( V/ A- M6 l* q  m' ^DSH 642
Subject:
! G, {0 B6 O+ U( |3 s* I" `( SMarkings
. b! X5 g1 j  c% x! S  |, q6 qKey words:
& L' k  \+ ~2 p% l  {- marking
7 R, [- O$ z/ H/ H. z- frequency
Approved by the 45th CTL plenary meeting 2008
) `7 D) f9 k& c- o; r+ _Question:
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
Rationale:
! ?7 X3 P" K: SThe standard itself limits to the frequency range of 48-62 Hz a.c.:
, G8 _% u# l4 C( u0 |9 J8 ~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
+ E% A9 z7 T4 [3 wThe marking requirement in the French IEC version reads:
6.1.1 q) Le type de courant: alternatif, continu ou les deux
. C6 S" r3 A3 ]- T4 b* o) iThis means only the English IEC version requires to mark the frequency.
Decision:
& A& z/ h. s8 D. kYES, 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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