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% n: e: ^6 B* `8 K* v3 W
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。, P4 E, @* }; K5 ]
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V0 v4 s6 c( z @) @: F9 ^
peak when secondary terminals are interconnected, if the following conditions are met:: B. R c% U* C! u/ Y
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections& V5 d" W# p+ a7 M# U# l% \
are made between secondary terminals and. }) a* G" ^* m4 s, T+ t3 P/ w
b) The transformer is marked in accordance with Clause 17.4.2
0 {2 \; L) }1 e4 h+ r9 R! X
: u& K( T" P2 j Q# A5 e) R17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output/ o) T2 ~/ O: y/ s1 ^ w7 `
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
* v+ H) A' |) q8 A7 cin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word7 p4 p# {; M6 e5 n, [
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect. v. ]9 I8 U" y9 C; ? C
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The s$ @. ?0 H3 r6 O2 w5 L- f5 z
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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