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Standard(s)-(year and edition):# p/ N( n7 @# M# Q3 c* C4 z+ j
IEC 61643-1, 2nd edition, 2005-03
( g6 u6 @( Y' `Sub clause(s):- D& \( D% \' j8 R& X& D+ N7 Q
6.1.1 q), e; L# _6 h9 Q( d, |3 H+ U
DSH 642: Q: Q7 D, b8 P6 D0 B/ ?3 }
Subject:9 V* n8 _' |: _) V0 g! ^- @0 [; X
Markings
4 U) e ]5 |3 ]( \Key words:5 }6 @5 B' P, H) e7 R, R
- marking
/ ^$ w6 N9 |% ^% {; T2 h6 V, t- frequency
* U, d! i6 M& N8 G& n) k# RApproved by the 45th CTL plenary meeting 2008; [1 S# `/ W' m! C' ~/ A
Question:
- }" _0 h1 T# G$ m% YIs it acceptable to mark only the type of current (e.g. a.c. or ~), but without giving the frequency?9 A- b% {6 U! D
Rationale:
/ Q( h; b( J% MThe standard itself limits to the frequency range of 48-62 Hz a.c.:
9 e2 j+ J& O' b, B: _- t2.1.1 Frequency: frequency of the supply mains is between 48 Hz and 62 Hz a.c.: |- g4 [% Z; n4 e
The marking requirement in the English IEC version reads:: a! x) {8 u) x1 ` F' F
6.1.1 q) Type of current: a.c. frequency or d.c., or both
9 w' B* B( q J/ ^2 J0 aThe marking requirement in the French IEC version reads:
! j0 {6 a+ {' s$ Z6.1.1 q) Le type de courant: alternatif, continu ou les deux
0 T0 Y3 v0 D6 a' w6 a% D9 A# UThis means only the English IEC version requires to mark the frequency.+ j5 V: H9 g& A% F) V
Decision:+ ^; `/ I' h |7 ~
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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发表于 2012-11-7 19:15
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