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1.2.4.3
. e- _5 v0 l/ H( V5 GCLASS III EQUIPMENT' b5 @5 W; w& E$ l
equipment in which protection against electric shock relies upon supply from SELV CIRCUITS- ^ J, n& A3 p- I# E
and in which HAZARDOUS VOLTAGES are not generated; O9 P& M6 a( h8 A) o- W% Q5 ?) R$ z
1.2.8.6
( c2 X. A7 Y/ a4 A0 L4 U& D+ }5 WHAZARDOUS VOLTAGE
: {- u9 o# w9 O$ d8 e% V4 ?voltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the
! d. v% T& T7 o" ^* e5 M. Rrequirements for either a LIMITED CURRENT CIRCUIT or a TNV CIRCUIT
% g9 k9 A2 ]2 [0 @: E6 y! l! V ^: ?
我个人也是觉得定义为三类设备有点勉强,电话机里面没有产生HAZARDOUS VOLTAGE这个可以说得过去,但是电话机连接到TNV电路,而TNV电路又不一定是SELV电路;既然不一定是SELV电路,那就很难满足三类设备的定义。 |
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