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1.2.4.3& g+ Z# b/ D3 v% W# n& q" J: d; Y
CLASS III EQUIPMENT8 h( k0 N s4 r* B* \' V
equipment in which protection against electric shock relies upon supply from SELV CIRCUITS1 @8 C1 g4 q8 v7 ?
and in which HAZARDOUS VOLTAGES are not generated
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/ @7 E$ y- U/ cHAZARDOUS VOLTAGE, |. a* h. J1 G! A
voltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the2 }+ ~6 G0 Y) _
requirements for either a LIMITED CURRENT CIRCUIT or a TNV CIRCUIT* R6 X% D. A4 F+ p
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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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