IDMT query
IDMT query
(OP)
I'm sure this is simple.
I was looking through some old books the other day and found some The usual SI, VI, EI and UI were ther but there was also an RI curve.
Can someone tell me what the R stands for?
My best guess is Relatively.
Thanks,
SA7
I was looking through some old books the other day and found some The usual SI, VI, EI and UI were ther but there was also an RI curve.
Can someone tell me what the R stands for?
My best guess is Relatively.
Thanks,
SA7






RE: IDMT query
RE: IDMT query
Many modern relays have an RI curve setting that emulates this relay's characteristic (eg ABB's SPAJ140).
I don't know what it stands for, but that could be what the book is referring to.
RE: IDMT query
RE: IDMT query
http
RE: IDMT query
It has an odd operating principle - the disk spins all the time, and uses a worm drive to close the contacts after pickup. Obvioulsy, the faster the disk spins, the quicker the contacts close!
Bung
Life is non-linear...
RE: IDMT query
Sounds like how American highway engineers were at one time using Nazi blueprints and design manuals! Really remarkable how those Nazi's made some technologies happen.