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/ s5 h0 h+ _: `+ ]2 I
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。
1 p5 z8 o) C" HNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V1 E0 [7 K, j2 H h6 v2 ]- X' a8 b
peak when secondary terminals are interconnected, if the following conditions are met:9 }5 {. [ ?' z- B- v. b
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections, j, t1 D4 v; [3 X/ _
are made between secondary terminals and! v8 J! Q# ?( W! a& E* W+ o+ ?0 E
b) The transformer is marked in accordance with Clause 17.4.2( f4 p' z( o; c1 P8 X# y# I) P4 F
- c! p9 W! j' t+ l0 b! n$ h17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output+ h/ ^9 X* I- t. R# s: r
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified; D0 Y6 F1 @- @3 G7 u% H6 Q
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
- T" m, k7 D* b0 ^″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect% T* _* W! X- h
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The8 S8 h& t$ Q K- E/ s: } R; Y1 Y7 |( s
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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