( S( M3 u$ N j+ s5 QStandard(s)-(year and edition):7 B7 b) g5 ^" C8 Y4 r7 \# v$ ^- m( Z0 _' v
IEC 61643-1, 2nd edition, 2005-03 ' [" Q' e4 C+ G$ ?2 f# s( bSub clause(s): ) k- R* Q( ?/ E- C6 n( U& p# r6.1.1 q) # Q# A1 ~: a" M# g1 z' UDSH 642 4 m u; ~) N0 N/ C1 nSubject: 2 d: C9 G2 c I0 I+ hMarkings : o7 P9 i% ? Q6 U/ a5 lKey words: $ k' w7 ]) [: w* Z; E8 I4 m, {. E- marking 1 D; G r' X& [5 h6 H7 U- frequency& M7 I# s+ ? T9 I8 e9 P: k
Approved by the 45th CTL plenary meeting 2008 $ o- m) X5 Y# O7 U" e! rQuestion:3 _, G: K4 N* }3 I2 N z
Is it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency? ' e6 z% H3 ^5 @! t/ X' M2 eRationale:3 m1 b6 q/ s. Y& J1 A( n! X. ~' m; G
The standard itself limits to the frequency range of 48-62 Hz a.c.: # F m9 V' H$ l: _) O1 M" Q2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c. 4 B2 k# m3 P8 m4 Y! F) G6 vThe marking requirement in the English IEC version reads: . ?, O0 j6 h, {7 _& J& R& j" d6.1.1 q) Type of current: a.c. frequency or d.c., or both % i9 \- b; K/ N" D6 Q% V" A( NThe marking requirement in the French IEC version reads: ! [5 ~* e( y" ^! v, n4 P& Q; U6.1.1 q) Le type de courant: alternatif, continu ou les deux$ n4 {% k% k/ C$ B& X a: B5 i
This means only the English IEC version requires to mark the frequency. " a, v3 u" b& T) FDecision:. f% }% X9 v" |( g$ N8 z6 q- V
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.8 E, ^7 Y1 w; s7 x6 M' O0 e
% o" N5 D" ]# W% D[attach]77214[/attach] 1 B( y/ z. C* ?, O. w* F( X
DSH 642+ o( P* Y* }* @7 L