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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。
- M$ ]5 U% u/ v7 D& C oNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V8 ~; t, o+ ~& [+ R7 y1 t( }4 h! X# l
peak when secondary terminals are interconnected, if the following conditions are met:: {# J3 I8 ?. x0 P# B5 e
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections. l7 D4 h: E7 J7 Q: N, p
are made between secondary terminals and
* }; I/ r0 s7 }, m2 Hb) The transformer is marked in accordance with Clause 17.4.2
2 E$ @: A4 A% U$ T3 E( m- _7 D. g+ x- Y* J# d: n
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
* T C) ^ @' S+ o6 rexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
# J7 A; `4 Z7 q: N0 ?3 k! w8 o- tin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word& _9 _. y$ F8 r: N" d4 `
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
) N1 x7 N$ b5 A, Psecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
! L+ F- \+ c! `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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