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Measurement category I is for measurements performed on circuits not directly connected to4 b; L2 B, u% @' S
MAINS.
d' D3 e! {7 z& q) t+ v% IExamples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits.& k3 f' U0 [+ W/ l
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?
1 }2 y/ z: }7 `2 EMeasurement category II is for measurements performed on circuits directly connected to the
7 I) g4 ^2 x* [0 |+ {' a5 Ilow voltage installation) Y, s# ~3 I5 e2 d( B- b M
Examples are measurements on household appliances, portable tools and similar equipment
5 R* M+ M3 f! y$ l7 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?" G, d* ^; K9 o6 Z. I+ L, b, f
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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