Overshoot on removal of current?
Overshoot on removal of current?
(OP)
I'm looking at a request for quote on for a protective relay and running into a term I'm not familiar with. The request comes from Australia, and I don't speak Oz. The requirement is:
Thanks.
Is that a drop out time? Is it when an inverse element is timing but hasn't tripped yet and the current is removed? Or is it something else all together?Quote:
Overshoot on removal of 20 times setting current - Not greater than 0.05 sec.
Thanks.






RE: Overshoot on removal of current?
I don't speak Oz either, but it sounds like a reference to the days of mechanical induction disc relays. An induction relay with 20x setting current would be moving fairly quickly: on removal of the current the disk would have a tendency to overtravel in the forward direction (toward tripping) before it slowed and reversed back toward its quiescent state. Is this a replacement for a very old relay, or a spec issued by someone who has borrowed it from yesteryear and not updated it?
----------------------------------
Sometimes I only open my mouth to swap feet...
RE: Overshoot on removal of current?
RE: Overshoot on removal of current?
If you find out what this really refers to, could you post the meaning here so I can understand what they mean too? Thanks.
----------------------------------
Sometimes I only open my mouth to swap feet...
RE: Overshoot on removal of current?
RE: Overshoot on removal of current?
A google search for "overshoot electromechanical relay" gives sevral hits. Here is one of them
http://www.markenrich.com/appnote.html
I hope these can answer your question.
RE: Overshoot on removal of current?