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2 S0 j5 q. W& e2 R j* ?, ~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。
- o3 G3 g ?8 rNote: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V! o1 ^! j# s; a" S3 g* U
peak when secondary terminals are interconnected, if the following conditions are met:
4 D' o) t5 v- k' V, K. F+ xa) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
, d- N- R5 E: Y3 T3 E. i: ~. Iare made between secondary terminals and5 A/ Y x) A* B& J* y
b) The transformer is marked in accordance with Clause 17.4.2 J- d, i, F; c
# X6 J6 }$ U2 f. K
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
9 n3 @5 C2 I0 d/ P9 p2 iexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
- K0 R+ b- P. U. V9 o! bin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
4 z/ z/ H, R8 Z1 z" i" d; y″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect
% U2 B2 Y" Y" rsecondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
6 Q; t/ J. x8 r& C- aremaining 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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