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7 q/ x {% I; x* S. k7 z2 c
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。
; T8 S/ ]6 u; d6 g( M5 Y+ N9 s' `Note: The open circuit voltage between secondary terminals of a two-secondary winding transformer may exceed 42.4 V7 A+ @0 ~/ v! v' Y
peak when secondary terminals are interconnected, if the following conditions are met:+ K3 _8 W$ I) t+ F3 F
a) The open circuit voltage between any two terminals is not more than 42.4 V peak when no connections
) I' z/ i1 ^( `( ?% iare made between secondary terminals and
( g# A3 N) H! E6 a3 F- Kb) The transformer is marked in accordance with Clause 17.4.2 }" S4 \" _1 U& k. F3 M1 W
& ^( F- H& e( n9 @) i% p/ b( x- u17.4.2 A transformer with multiple secondary windings as described in Clause 4.3 having an output
5 }( |3 G. w* i2 ^ Nexceeding 30 V rms or 42.4 V peak, or a transformer with an output current exceeding the limit specified
/ j5 [5 N. R+ {) Ain Clause 28.1.1 or Clause 28.3.1, shall be marked where readily visible after installation, with the word
8 ]" z O' _! }& q″WARNING″ and the following or the equivalent: ″Risk of electric shock or fire, do not interconnect0 A) X, C& Q- y$ y z! J# s. Z
secondary windings.″ The word ″WARNING″ shall be in letters not less than 3.2 mm (0.125 in) high. The3 \' j5 q' r& w; z) b
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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