标题: 阅读标准的疑问 [打印本页] 作者: 童言 时间: 2007-12-19 11:18 标题: 阅读标准的疑问 我现在正在看65的标准,标准里有定义directly connnected to the mains与conductively connected to the mains,并且给出了定量的描述,但是我想问的是怎么在一个样品中分别出什么是directly connnected to the mains和conductively connected to the mains,特别是conductively connected to the mains,与之相应的还有一个not conductively connected to the mains,这些在实际的样品当中实在是不了解,分不清楚,希望有高人给我解答下.作者: 童言 时间: 2007-12-19 14:32
人过留名,鸟过留声那!大虾们,发表下意见撒!作者: david888 时间: 2007-12-19 15:12
关注中.
我的理解:是根据定义提供的判断依据来判定设备与电网电源之间是否为directly connnected to the mains与conductively connected to the mains.作者: 童言 时间: 2007-12-19 15:28
那样的话,就是说要接个电阻,然后测它之间的电流,感觉这样判断有点,麻烦,会不会有个类似与经验总结的判断方法?作者: 童言 时间: 2007-12-19 15:29
比如说一个带适配器的设备,他的输入是DC12V,它不与电源直接连接,那它到底是属于conductively connected to the mains还是not conductively connected to the mains?作者: david888 时间: 2007-12-20 18:15
我想问,在哪个条款中涉及到了这两个概念?作者: 童言 时间: 2007-12-21 15:30
在第二章的定义中就有啊
2.4.3
DIRECTLY CONNECTED TO THE MAINS
electrical connection with the MAINS in such a way that a connection to either pole of the MAINS
causes in that connection a permanent current equal to or greater than 9 A, protective devices
in the apparatus being not short-circuited
NOTE A current of 9 A is chosen as the minimum breaking current of a 6 A fuse.
2.4.4
CONDUCTIVELY CONNECTED TO THE MAINS
electrical connection with the MAINS in such a way that a connection through a resistance of
2 000 to either pole of the MAINS causes in that resistance a permanent current greater than
0,7 mA (peak), the apparatus not being connected to earth作者: david888 时间: 2007-12-25 19:57
不好意思,我的意思是想问除了在定义这一章,还在哪儿有出现?