hello,
why the rotating alluminium disk of induction type over current relay's surface is rough or dotted? and why its shape is spiral?
regarding Induction type over current relay
May 30, 2007
3 Replies
hello,
why the rotating alluminium disk of induction type over current relay's surface is rough or dotted? and why its shape is spiral?
hello,
why the rotating alluminium disk of induction type over current relay's surface is rough or dotted? and why its shape is spiral?
I don't know about the rough surface, but the shape is to achieve a certain kind of inverse delay (IDMT) characteristics. (Remove the two Roentgen-ray characters to reply.)
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