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Measurement category I is for measurements performed on circuits not directly connected to2 z2 F$ j& A# `: V
MAINS.
* N9 A Y F- X2 f! \Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits. c A; d, R4 u: ]2 Z
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?
! U2 M3 [1 e& D: t D% DMeasurement category II is for measurements performed on circuits directly connected to the
O, q3 p' C4 X! s. V! ylow voltage installation
& _- C/ ^' D& ]) h; V2 hExamples are measurements on household appliances, portable tools and similar equipment+ Y6 O& N6 D$ ?% }$ d
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?5 V: p* k2 L, i) {/ C% |
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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