DSH 642 Markings

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DSH 642

Markings

6.1.1 q) 5 |4 e& F& G3 ^  d, |

61643-1(ed.2)

Standard(s)-(year and edition):
1 F: D! f0 \% y# LIEC 61643-1, 2nd edition, 2005-03
  D( v# O( w* F: E  ]Sub clause(s):
) B4 Y( G, c. q* x' h' ]2 j1 [* w% b6.1.1 q)
DSH 642
+ e+ u/ u9 w  b/ |' tSubject:
Markings
4 D# Z# t# C7 K" l2 M, K: jKey words:
- marking
- frequency
) O8 w. U1 N: ^: k9 d  [. }Approved by the 45th CTL plenary meeting 2008
9 J8 F0 J5 D! y. [( f* ?+ ^Question:
1 @6 \0 s1 N# [) k6 ^Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
Rationale:
! v; a4 m+ F; iThe standard itself limits to the frequency range of 48-62 Hz a.c.:
) o/ F6 t  ~8 ^+ Z6 H2.1.1 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
- U6 x0 E3 z* F' c( |* jThe marking requirement in the French IEC version reads:
6.1.1 q) Le type de courant: alternatif, continu ou les deux
) ?$ s) Y3 r) DThis means only the English IEC version requires to mark the frequency.
# T2 Y( ]: b& `5 n& {6 q' H3 DDecision:
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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