|
|
/ F2 E/ g" J$ A$ ?9 W. Q( h N
V1,V2满足有效值30V，峰值42.4V，但互联后，V3，V4就有效值和峰值都超了。（不互联 就V3 V4也不超），看到27后面有一行，就以为是可以豁免这种V3，V4互联超限值情况。
6 W1 k5 ^. A8 {. cNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
5 @! l( A2 m9 T, t3 T" b* H2 Zpeak when secondary terminals are interconnected, if the following conditions are met:0 r! F+ D' d3 E W) G l9 H
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
. U( E9 |9 l k. c' ~; N6 g: q% zare made between secondary terminals and6 S8 y9 q3 ~( ~+ m2 C+ `
b) The transformer is marked in accordance with Clause 17.4.2( l7 _1 L9 n& v! `5 @
% K+ c" w4 _1 ?9 Z9 l' Q! j17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
) d7 }, u* {( J2 cexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
- Y$ ~" F! f# [* \; tin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
+ z% V& b1 @" O2 g0 j″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
3 ~+ T, T9 M; f, g1 W0 X w. F9 |secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
6 ~4 L# w9 h, w, jremaining letters shall be not less than 1.6 mm (0.063 in) high. |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
发表于 2024-8-14 09:54
显身卡