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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。" M* \$ R9 V' s3 o! P
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
6 z9 P4 [5 N% b3 D: D+ w4 mpeak when secondary terminals are interconnected, if the following conditions are met:4 M9 {, g6 M P0 { \
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
) [6 {, a0 N4 Y3 `are made between secondary terminals and# \0 D! I2 |$ C R6 k
b) The transformer is marked in accordance with Clause 17.4.2
+ M" _' C3 H5 \# x2 V/ T: N! k9 |7 S6 T6 C6 a3 |
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
- o% ^) x- \, @7 x$ Wexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
1 O' V) w; s; p( ~9 f4 _. G' s2 Fin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word) K2 z- N0 O0 Z& s2 W
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect+ L- i; } e9 M- P) \
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The A) A- G/ }/ N2 Y* w! h1 v 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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