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2 @9 z8 f3 U6 t1 X7 E5 X- ZV1,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。
% X5 e E, N6 _* r& [Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V, k& c! [" m% J. ?( [ l: g* `/ }! ~) y# R
peak when secondary terminals are interconnected, if the following conditions are met:
- `3 ^ V, i4 T, L# p. c1 ea) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections3 E: r$ K0 _( y. P. g( f# P, g
are made between secondary terminals and
* s. h1 S! [/ P/ z" lb) The transformer is marked in accordance with Clause 17.4.2
2 P' a. R9 U6 @' `1 |3 p6 f! K. ^7 F% Q5 J1 J( [
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
. W# m& n5 A/ t2 \8 u" gexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
- q, i/ i5 d; M: Ain Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
; W* T# p$ s' a1 Q' `″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect9 G3 u a6 B1 L$ d5 U1 m
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The7 m7 i2 x6 U- F2 Q ^- N
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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