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( O; ~% x; X4 ~1 oV1,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。# N$ p$ G! g1 r, {
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V3 s. d( H8 x1 Y0 f7 T$ v
peak when secondary terminals are interconnected, if the following conditions are met:7 o, A" F" |/ @, T
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
: L# ~+ U% N* ~4 @& ?are made between secondary terminals and
* u. {$ r7 W- T* \( w5 {b) The transformer is marked in accordance with Clause 17.4.2
+ {9 I( }$ n) F& O. m
2 L4 F* _5 y. a9 B- ]9 x, h17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
7 F- h4 M! H( ?2 A, Oexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified6 J* m, } @ S, V: J
in Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word/ I4 V2 |7 B" W- ]
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect4 Q6 k& T O) m
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The' y. {) K* K5 ` w. A, 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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