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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。
" S- F7 } I7 o- t- RNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
5 A7 ?- z3 ?7 ^3 i0 xpeak when secondary terminals are interconnected, if the following conditions are met:
6 e- G! F3 j: d7 [, ba) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections2 _9 K3 V& N7 q9 ~& B* X/ i
are made between secondary terminals and- Q- H9 x% @* M7 |- ]" v( d( [/ Y
b) The transformer is marked in accordance with Clause 17.4.20 ^0 E" A# @% o+ I
& j _ M: M6 i4 Z# J17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output! I: `9 Z& G: h, }* K; S9 T5 m
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
`* m$ I) }! V2 n6 p3 n3 {# Yin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
E3 n1 _3 P8 ~1 c+ c/ F″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
2 f) t2 Z- i: Z4 h0 dsecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
% Y6 y% p( H- A2 Q9 l; E/ gremaining 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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