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6 X- L( L1 C4 V+ D. k; b% e# Z5 k
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。
: ^' ]. w) y+ cNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
- y B! g E$ speak when secondary terminals are interconnected, if the following conditions are met:
, [, w# }- f& g1 r$ u1 f" j. qa) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections. W( F" @" L7 S6 I- G0 @! _. z* D' W
are made between secondary terminals and
4 r6 u0 p4 O- a- t% q+ R X/ x) L; Bb) The transformer is marked in accordance with Clause 17.4.20 B: k0 m" r* n* T( u
+ N: O+ X3 H5 B3 |6 I
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output* |. f1 O/ i9 h" \9 U$ f3 M
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified, @9 H0 {. n* N/ Y# _( [
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
' ^. n1 l. S- q5 E# {″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
7 |$ x* X; J7 Y4 ?- N* Msecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
# m& I8 F$ |9 M g$ C% i# Rremaining 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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