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1.2.4.3( M; t% a9 ~5 a/ `: ^% A0 B
CLASS III EQUIPMENT6 ~. H% x4 c9 y: v' B- t3 M& ?0 Y
equipment in which protection against electric shock relies upon supply from SELV CIRCUITS
) h: q& [! j3 b4 V0 I! C9 Hand in which HAZARDOUS VOLTAGES are not generated
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4 ^, ]. u- U. e3 `HAZARDOUS VOLTAGE+ l L' {6 k9 j2 x: h, Z
voltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the, g! ~% J) ^. s
requirements for either a LIMITED CURRENT CIRCUIT or a TNV CIRCUIT8 r# U; N% q9 F3 l) d- b- m
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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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