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1.2.4.3- u( Q1 v, m O" K. n# d/ F# ~
CLASS III EQUIPMENT3 W7 {3 i2 m, X6 j- n% I
equipment in which protection against electric shock relies upon supply from SELV CIRCUITS
& w4 x- w' Q5 u' V d( ~% Cand in which HAZARDOUS VOLTAGES are not generated
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4 m( Y$ R2 R9 V! RHAZARDOUS VOLTAGE
/ i4 E7 H) `+ d: B4 y6 K( Kvoltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the( {7 s: F, ~- i, c' b
requirements for either a LIMITED CURRENT CIRCUIT or a TNV CIRCUIT
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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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