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1.2.4.3& u0 `: z3 o [3 G
CLASS III EQUIPMENT
$ {6 r. _* c/ r% ]& ]* G& z' ~/ C* requipment in which protection against electric shock relies upon supply from SELV CIRCUITS
3 {$ P3 U! ], U" d& u- z* `3 aand in which HAZARDOUS VOLTAGES are not generated/ W& ~2 t% X: r; U: f
1.2.8.6! R# r& M8 t: U4 U: L+ @
HAZARDOUS VOLTAGE& n3 I1 \; k: S* u6 O
voltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the( N5 N0 F7 i; Z( X5 y
requirements for either a LIMITED CURRENT CIRCUIT or a TNV CIRCUIT$ v% @2 y1 ?! z. d+ n C
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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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