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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。! P( ?8 a+ H1 v( Y' S/ A( P
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V; t) j) f6 V) G" B, ?; _8 X7 ]* L
peak when secondary terminals are interconnected, if the following conditions are met:8 t/ }* ?) y9 j. s& ^* T7 Y5 x
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections9 d1 G2 P/ m f
are made between secondary terminals and
. Z5 }3 P% h: x3 o3 rb) The transformer is marked in accordance with Clause 17.4.2( _8 G2 l( Z4 o S- {) R0 O7 S) G+ ?) O
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17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
/ d! b# e! k, I1 `" W& aexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
9 z/ Q3 P4 {7 d- Iin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
7 S% ]/ @/ D/ [* m n) `; B/ p″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect, \* E1 f' I# Z" w7 R9 t" {
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The9 M& B" _% i4 Z+ Q' 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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