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% U) H* v" x% wV1,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。
: p8 C3 }3 |) m0 [Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
d e0 t; g4 n0 J/ \+ Lpeak when secondary terminals are interconnected, if the following conditions are met:
; X) N9 q- B7 g4 P4 {a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
# O+ m" K4 E" T' e# {* h2 care made between secondary terminals and
- \0 Q1 Q# B; g1 b& R9 tb) The transformer is marked in accordance with Clause 17.4.26 K, r9 f6 @: k
# F8 ?0 _ N4 P J. C
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output" A" n2 R4 S/ \( m( X
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
' ~: j W' C( m' bin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
1 W# z! |4 Q5 }9 c G″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
9 W& r' [4 R; z4 o# h% E9 Tsecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The$ _; L; Q8 q" W; z0 F
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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