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; m1 r: t0 _/ P0 _- H
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。+ r2 s5 t& m! f- s
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
) }/ d+ Q$ }5 r' s! K7 lpeak when secondary terminals are interconnected, if the following conditions are met:
* {* C0 l. n" T o4 fa) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
m0 ]; K4 Y2 p6 c$ T' ?1 m4 \are made between secondary terminals and
_8 j1 ~+ l" N3 z: pb) The transformer is marked in accordance with Clause 17.4.2
$ f7 }) s1 D, F! G2 y/ U; ?4 M8 M7 ?
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
; K9 n2 f# V$ P3 b5 J$ texceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified9 `$ p- ]( l# b8 i- E# b3 [
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
' ]9 h! ]2 \" |2 B″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
: D2 t7 e. n: b, P/ Y1 a6 p# Xsecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
7 C/ b* u$ ]8 Y" [. s B# K2 Sremaining letters shall be not less than 1.6 mm (0.063 in) high. |
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发表于 2024-8-14 09:54
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