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; j4 V" Y- X0 X& V) X' A _Standard(s)-(year and edition):3 i w; k! o# p+ [- h) t6 |
IEC 61643-1, 2nd edition, 2005-03
/ f0 I: O: i6 N: G) I# eSub clause(s):
" U7 O5 n: [/ }( Y; q6.1.1 q)
" f& I9 M& |+ P& w& ODSH 642
' q7 c0 N4 Q; ~6 [/ `6 p9 b. ?7 rSubject:
: o( h7 ?: v8 v R" S5 i8 BMarkings
0 H0 l: F- ~/ Q1 BKey words:/ q. U7 e# C# E( f. ]
- marking8 P$ M& r# ^- B. d! ^
- frequency0 D5 z8 x: |" J; B7 W
Approved by the 45th CTL plenary meeting 20086 F& {8 n" O0 J% T" g3 D6 G9 I
Question:
. [# ]) Z |6 s9 g/ v8 `Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?+ i0 n, P" k2 V
Rationale:
( A: I, \% e* O) e% K. Q; u+ rThe standard itself limits to the frequency range of 48-62 Hz a.c.:/ c8 j, ?; v' n. i8 w: P+ A& x9 n5 i
2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.6 W3 l# K" Q% D1 k
The marking requirement in the English IEC version reads:
0 l1 Z7 C* N5 h0 q; s6 k1 a1 J6 ^6.1.1 q) Type of current: a.c. frequency or d.c., or both& I- N$ t4 A5 \8 l6 j( p
The marking requirement in the French IEC version reads:
2 D2 s; v& Y0 ~) R+ m" @6.1.1 q) Le type de courant: alternatif, continu ou les deux- J) R1 z( E7 o& c
This means only the English IEC version requires to mark the frequency., I) l' a3 W5 D- `
Decision:
! p6 V# Z) Y5 m, W4 e6 n1 D2 ?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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