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z/ k! }. b3 r
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。! s( [% S. r4 y8 H `3 }
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
2 Z I6 B' g1 H- O- t) x0 ^0 ipeak when secondary terminals are interconnected, if the following conditions are met:6 a+ @: W* ^! [6 H8 }% X+ q! N' ^( \
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
/ A! }( n& j+ Jare made between secondary terminals and0 V* F7 e' ~ r j& v5 Q K
b) The transformer is marked in accordance with Clause 17.4.2
9 K3 V0 V1 [- X+ V9 ~$ p: T: i# J- U! j+ F& ], m4 F+ {
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
! E0 i5 s$ V- l; o) v; K2 _' eexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
" k3 Z/ @0 T# i6 V& S, u \in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
) {6 d% y# Z; K″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
, y/ S! `$ a) j5 u& x6 u% {; K, ?) hsecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The$ J6 g r0 [2 ?! y, P2 @! r6 O
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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