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灯具的SELV与IT类的的定义是不一样的，电压限值是50Vac rms, 120Vdc , 并且初次级之间是通过符合61558-2-6的安全隔离变压器隔离
# t1 v4 r( g4 R S* C0 i" {" r1 X
* l, Z! f: m" NELV (extra low voltage)* @% m7 t+ } x' h0 s3 i* U! @8 X. }: o* ]
voltage which does not exceed 50 V a.c. r.m.s. or 120 V ripple free d.c. between conductors, or l$ _" Q6 w' U) z
between any conductor and earth
1 V3 g7 z& K% o
/ Q% I: X7 B4 x5 Y6 QSELV (safety extra low voltage)/ v0 L2 ~( _* i& h/ }
ELV in a circuit which is insulated from the mains supply by an insulation not less than that
) h* ], k {6 j' l' k# H1 Bbetween the primary and secondary circuits of a safety isolating transformer according to
8 v9 H, j! w# xIEC 61558-2-6 or equivalent) `% K9 z# N8 K K ^. |
" a7 A* G; P# z; f是否可以触及还要根据漏电流和空载电压等测试才能判断 |
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发表于 2011-7-1 15:49
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