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; {) F. q) R9 S! M' p9 h2 P' t3 r2 I
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。 V, i6 [, u Z$ o4 l, U4 E
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
# ]4 f+ M! e/ |: ]peak when secondary terminals are interconnected, if the following conditions are met:% L* F" s4 m% D& v7 H, e$ |4 T
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections/ S' b' W% b( r ?! V9 X- M- y" \
are made between secondary terminals and
; J- H& {- `! u8 Z7 B( R1 I+ W' j; `b) The transformer is marked in accordance with Clause 17.4.21 B7 m- L* k+ e" n: i V9 e
6 ?% Y0 p$ y' R6 u17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output: z, N2 S0 ?+ U2 w7 U
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
/ H( t# A: v7 E' g$ s# X# Gin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word* ?, y4 H2 b, b
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
. V8 k/ P, x! O- zsecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The1 a; @- s- B/ L1 N! R
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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