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( o1 B2 s5 R! C1 P, V 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。
8 z w3 w2 p* ?8 U4 YNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V, w3 e% R. M8 v9 j3 x4 \9 d
peak when secondary terminals are interconnected, if the following conditions are met:
- o3 k; p7 i0 }" y0 ma) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
* |" m3 u A3 Q" h! care made between secondary terminals and
; F9 q. a3 ^& {0 C5 \$ `* mb) The transformer is marked in accordance with Clause 17.4.2
`3 P, c2 s4 M: i: s& i6 N: t$ ^" t; g9 u! S
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
- S0 q' t( F; {5 s6 W Uexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified/ \8 s( C; e& Z8 s5 P" r. q& A
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
4 Z; x( ]/ F( }, i& ^4 G″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect. x- |0 j, m: A: t( |7 a) P
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
# @4 X2 q5 C. sremaining 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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