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7 V) a3 h$ A% o/ W- c+ x& [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。1 b, m" _* ^" G
Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V
) m) a9 d) }- V# O) }& k2 ^# lpeak when secondary terminals are interconnected, if the following conditions are met:" I" v" f( B: h) n7 C; D' d4 z
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
* R% t2 N9 q3 E% G: Care made between secondary terminals and5 n6 a$ \* U7 E9 Q! b) m6 |8 i% F0 z
b) The transformer is marked in accordance with Clause 17.4.2
3 F3 ?7 t( y5 q( E1 ?0 @- }2 E- ?, _& F! Q
17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output7 q. |7 a" ^. ?; \' B3 F3 S4 Z }
exceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
" p. p( u5 u# h$ d) Kin Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word0 G z w8 S% e- B: C
″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect9 @7 {! g8 _" F* R
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The
s2 Z2 I) H0 jremaining 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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