|
|
. O) f @1 P' uV1,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。9 K$ F5 d; C4 L2 c
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
- V' {! p( r! ypeak when secondary terminals are interconnected, if the following conditions are met:$ R; Y* o! I2 I
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
; W: w& |" t z& h3 z* y+ K( ?& W9 yare made between secondary terminals and
Y( ^" g4 x+ F+ h0 Y3 i; b3 Gb) The transformer is marked in accordance with Clause 17.4.2& t. C& _4 C$ x* y
, J# v* d6 p- h7 N# d8 m17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output/ J+ I* O2 {& R0 V1 f* C$ c
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
7 r/ Y" }- c7 H4 n. E0 x6 T* win Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
9 r1 m* d6 B0 |: a" T. A9 {9 s! ~- d″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect5 M1 B1 B$ @/ e9 J4 t3 P9 I/ }1 A
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
$ F$ l0 Y$ B+ [1 \: H+ Cremaining 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