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6 G7 i4 }; N- Z! \. P/ eV1,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。
( _8 e' K/ v3 h. b3 e! E X3 X$ w! tNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
% s3 O- r7 R; J: J8 ~* g8 z% q+ K& apeak when secondary terminals are interconnected, if the following conditions are met:! ^- z- v/ N6 G9 R* K4 a. J: o8 B$ s
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
/ A+ m3 {" k3 X6 l% |2 r- lare made between secondary terminals and. {# `2 z* V- ] P' |; V' ^; X) Q
b) The transformer is marked in accordance with Clause 17.4.2
: [) o( _" L! d) ?4 x* B; X6 V! z0 O3 d& b$ k4 Z, B0 U
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
; e8 B3 R* p; l% qexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified5 X; [( z9 |8 J) _- D0 ~
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word3 x6 f% \* C- J Z; I: g: j
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
/ i5 ~3 H0 o1 \secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The6 F; k- T3 D0 k* ]
remaining 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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