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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& b: g' F1 D- y, h! J% U6 DNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
7 {# I; T/ y/ w& `peak when secondary terminals are interconnected, if the following conditions are met:
7 Z1 i# Y8 E$ \7 D* d3 `a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
( W5 F" [7 S3 v& Pare made between secondary terminals and
$ t4 q6 z$ F0 E5 w! x9 Ob) The transformer is marked in accordance with Clause 17.4.2
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/ D0 W! P+ `7 M7 x8 a; |& X17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
+ M+ l$ E5 S. S* yexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified" K% |1 y; ]* d! d6 C1 Y
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
$ E# t: t h! G( h5 Q9 R″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect. J t% ~: b, K6 }( k& S" I4 H
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The" P. K1 S7 I1 @8 D% H& `
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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