DSH 642 Markings

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DSH 642 8 f2 c0 A1 Q; M$ x- k

Markings " N2 E1 ]$ x9 i2 Z, \0 a* N5 v0 {

6.1.1 q)

61643-1(ed.2)

& _2 E' D8 ]; }/ }* fStandard(s)-(year and edition):
. W. |) Y+ V0 w# D) LIEC 61643-1, 2nd edition, 2005-03
Sub clause(s):
6.1.1 q)
5 K) a4 u) X6 ?, ~- q" r! dDSH 642
Subject:
Markings
7 `- u6 k# N( ?7 @" o" lKey words:
$ M0 U6 v6 ]0 W) O6 _4 Z' R- marking
- frequency
Approved by the 45th CTL plenary meeting 2008
Question:
5 ?# a& f, p! f, L) qIs it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
2 C1 D! a  F, H0 W# R& a7 HRationale:
The standard itself limits to the frequency range of 48-62 Hz a.c.:
9 I8 y& y" Y& `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:
( X9 p% [& m1 W' j6.1.1 q) Type of current: a.c. frequency or d.c., or both
! F3 ~* C# W/ c, ~' U+ k' a6 nThe marking requirement in the French IEC version reads:
! @: v  ?" f  i& m' n. ?( X! @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.
$ r! h" {/ Q8 CDecision:
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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