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Measurement category I is for measurements performed on circuits not directly connected to+ s3 U# G V$ h" B' v9 u
MAINS.
$ j' L+ w& T4 ^4 kExamples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits.
- m Z; T% C R; [- i: n; T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?
/ g& V& `" S" q: _6 N3 s# ZMeasurement category II is for measurements performed on circuits directly connected to the
* w3 r' t( p3 i! Mlow voltage installation
; b$ H2 K1 k E! zExamples are measurements on household appliances, portable tools and similar equipment
+ X& f; O, Z- i3 D0 Y/ e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?% y# A" }1 X. k- l
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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