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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。
. |5 s0 \/ q2 X4 d* ^2 K* H/ ?Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
) _; f9 j9 t$ g+ ]2 |! g. Ipeak when secondary terminals are interconnected, if the following conditions are met:0 D/ T- N7 a h- H4 D# v
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections* C; U# j3 |& X) G* F! Z
are made between secondary terminals and- q% }& R0 h6 t) k5 [
b) The transformer is marked in accordance with Clause 17.4.26 V, H9 P5 @2 l2 c$ F2 A% o, z$ W
0 N% X/ n5 I# \, F3 i& ]2 ^17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
. O# c' V( V5 o# P0 ]1 i8 L- Eexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
+ p! V* s! X, T& nin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
# v* N# J9 V/ u' s7 w& {″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect; u) N! U J" \' |6 {, z) p8 E3 c
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
5 J0 _: |7 ^- z7 ^) ~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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