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Measurement category I is for measurements performed on circuits not directly connected to. R9 o- \" D4 g% i$ k- s4 s) N5 F0 Z
MAINS., H! x6 z- r. q( K* }4 Z
Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits./ p+ Q! R4 m5 l: ^4 U/ K; K
测量类别一说不直接与电网相连的电路,像次级电路也算吗?" ^9 a- ~0 y1 l: b1 r" w. _
Measurement category II is for measurements performed on circuits directly connected to the
& e4 D- ~* n, y0 U$ ]. W+ Ulow voltage installation
6 I6 ?( A$ R. cExamples are measurements on household appliances, portable tools and similar equipment
: j9 k" c& v+ h9 g8 T测量类别二说是直接与低压设施相连的电路,但例子又说家用电器,一般的家用电器都是和电网相连的啊,那220V算是低压吗?" P8 S, l# t/ D9 v" q7 K
到底像通用的用插头连接电网供电的设备应该算测试类别几啊?感觉测试类别一和测试类别二区分的不太明显,他们的电气间隙在标准中也是一样大的,请知道的人给个准确直接点的回答啊 |
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