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| DSH 6420 T" T( ^3 \$ T
( b# d$ k9 l" L7 P, h; r: o+ n' B4 n | Markings
/ W& d ?# R1 p6 t4 e | 6.1.1 q)& I) M% b0 G, o0 g% d: \% r
| 61643-1(ed.2)( _/ K' T' A. {2 N
| 2 i% ]7 t O' K
Standard(s)-(year and edition):
1 f b) z; f3 j# z+ }& m1 fIEC 61643-1, 2nd edition, 2005-03) r' L& S6 k! A$ s. l! v
Sub clause(s):4 ]! t. @2 K4 p" g& v2 z4 j
6.1.1 q)
! f! E3 h0 N/ ]( {8 |/ lDSH 642& {+ D* w9 x4 @9 K/ p# ]
Subject:1 q% f+ r3 v0 Z# m. x9 b
Markings6 ~8 b" Z1 J* l* \( H( u8 ?4 L
Key words:
0 A$ Y/ `( R6 @3 v7 i, i8 ?+ T- marking9 K: Q5 h: E& P8 q$ w2 @2 b" X
- frequency
. }$ {1 `, k/ o3 B! u# _3 x* f4 YApproved by the 45th CTL plenary meeting 20088 Y4 l/ _9 ~/ q
Question:) t$ _5 w. v' E1 p7 C
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?3 X3 N# Q" c( g- M
Rationale:0 I5 U; v7 K' B* }* D( q3 ?$ O
The standard itself limits to the frequency range of 48-62 Hz a.c.:
) d* I: s- Y( N* H2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.# }% c" M* K _; ~, j4 g" e
The marking requirement in the English IEC version reads:7 s; e3 f! }+ N( x0 T
6.1.1 q) Type of current: a.c. frequency or d.c., or both
; z: Q; E0 j1 f" E" _The marking requirement in the French IEC version reads:
4 ~ a j9 V8 S% n' V3 E8 G# u2 Y6.1.1 q) Le type de courant: alternatif, continu ou les deux" Y) [$ m: P: G
This means only the English IEC version requires to mark the frequency.. B% [6 |% S; j2 v) L
Decision:" t6 h+ x, e. T; u
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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