DSH 642 Markings

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DSH 642

Markings + s: t& |6 U: ^& f5 v

6.1.1 q) # |5 O1 c  D) }/ ~: k7 R0 Q+ @4 J

61643-1(ed.2) 7 R# F. R2 s$ @5 J

5 X- P. {4 a+ _Standard(s)-(year and edition):
IEC 61643-1, 2nd edition, 2005-03
! f" s+ a" n+ Q2 O$ S( Q* QSub clause(s):
6.1.1 q)
DSH 642
4 o4 k& S8 D7 t4 ]0 ~Subject:
Markings
$ ?. d$ a/ w; X% d1 DKey words:
( ^* _0 v) P' c+ |- marking
1 G6 z" @3 j: Q$ y- frequency
3 v9 w3 a  Y' s7 L: j( q/ [: ~- iApproved by the 45th CTL plenary meeting 2008
Question:
) x' G9 D- w3 C5 Z4 ~% l) w" eIs it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?
Rationale:
- ?% M5 F, H/ B$ A5 R4 E- }The standard itself limits to the frequency range of 48-62 Hz a.c.:
( r  }0 p  D5 D$ i. h0 p. l- J2.1.1 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
" s4 u. E( d! d; \6 d' g; Y. I7 |The 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.
Decision:
9 K* z/ T- `" n3 ?5 aYES, 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.
" L! I% w/ P7 c' [8 E! F+ F