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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。" N9 o/ J" c' g+ O, ]8 m
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
8 D% l. ^/ u: c- u1 [; @! upeak when secondary terminals are interconnected, if the following conditions are met:2 H; o7 q7 Q, {! P% B
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections1 K$ V5 H" W+ p( Q3 u( k5 @
are made between secondary terminals and/ ^+ J) I0 h4 z0 r
b) The transformer is marked in accordance with Clause 17.4.2
. u. S; `+ l3 F. f! _
U2 K% r" ]. t% C! W17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
7 s, B3 x9 I2 E1 b/ eexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
/ b. C' g! ]% o2 D, Z3 H& d( q4 ]in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word0 @6 r* _) i, M2 v& j% k8 i# M
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect4 C: c0 i0 A3 e# Y) w7 [
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The" {2 c) n0 [9 X- V
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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