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Measurement category I is for measurements performed on circuits not directly connected to5 X3 Q% @- C& u8 m. p6 H
MAINS.6 s3 Z4 c2 O, X! |/ s8 l& E4 Z
Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits.7 B3 X% ~5 N3 H f8 \
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?
, @" s0 V& t; F$ w9 i m, MMeasurement category II is for measurements performed on circuits directly connected to the$ u# M3 m% K: ?, ?5 H+ D
low voltage installation9 V; H5 B8 m9 R; l$ T# `: y
Examples are measurements on household appliances, portable tools and similar equipment
+ b3 b* k- L/ K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?
: }) E4 i3 w6 Y% S( |+ \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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