|
|
Measurement category I is for measurements performed on circuits not directly connected to
' o8 g' J* {, H- FMAINS.$ l! P$ t0 g; C$ ^ q% ~6 t
Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits., F, H! [. b/ ?: k4 R
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?* s+ s. i3 d- F( Q
Measurement category II is for measurements performed on circuits directly connected to the5 N9 ] b* T, b) C; z4 d1 }
low voltage installation' _8 M9 ~7 x, T$ f7 r1 g; E& k$ I
Examples are measurements on household appliances, portable tools and similar equipment6 ?/ S, `% y f
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?
( ?3 c+ G* C/ c. p6 |: P( a% n. A0 e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 |
|