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5 w3 ?$ c( t+ D: HV1,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。# ]2 R0 m7 C4 V, V
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
3 }! w+ R" n7 X+ Apeak when secondary terminals are interconnected, if the following conditions are met:4 A# o# @: Y1 U8 |* Z
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
2 p/ N! Q. o& d$ g( Bare made between secondary terminals and
" i% W) g) ~' [# \. S( s/ V8 Wb) The transformer is marked in accordance with Clause 17.4.2
; L/ ]+ G: _! {6 A
* k, v9 ]6 R+ g5 [$ P2 m( R" q17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output: |# `/ H' C$ r2 d
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified9 c) U! t7 @0 O& e
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
& N, w6 b! _* Y" Y7 V″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect9 c9 U8 y. |; e1 ^; Y( ^; b
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The- l* e$ P" p' t, O) w) 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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