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1.2.4.3, w. ?- w& q. @1 ?/ w0 X
CLASS III EQUIPMENT
, m2 A, J3 Z0 b9 n- wequipment in which protection against electric shock relies upon supply from SELV CIRCUITS: _, j5 L {4 y0 n8 H& \
and in which HAZARDOUS VOLTAGES are not generated
) y. y; {0 q- R t- ^ }3 I1.2.8.6
7 ?' K) ]3 s& h$ lHAZARDOUS VOLTAGE
! r/ [9 y( }# @' ?3 S. c' p; N$ U3 O" svoltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the
# T( v' }& U+ u( i5 frequirements 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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