|
Measurement category I is for measurements performed on circuits not directly connected to
1 s2 x8 n0 q" o2 C" ~7 j0 @7 F& aMAINS.
, G+ u) o- e5 D$ }7 Z% G; HExamples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits.
4 \0 o0 K: @( p: {! |! }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?8 d1 z$ W. X+ G. a, n4 W
Measurement category II is for measurements performed on circuits directly connected to the
) m1 s: L* s! glow voltage installation5 X( k+ d/ B5 S" e1 A, E0 l1 b$ _
Examples are measurements on household appliances, portable tools and similar equipment4 [# o {3 W2 B5 H, A7 u0 _
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?: S' g: v' | q- b6 L3 _- c; t/ Q
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 |
|