IAC Relay Curves?
IAC Relay Curves?
(OP)
Hello all,
We everybody know that protective relay characteristics curves (Normal, Inverse, Very Inverse and Ex. Inverse etc) are defined as ANSI curves (IEEE C37.112) and IEC curves (IEC 60255).
Then what are "IAC" relay curves. Could anybody explain
1) For what does IAC stand for?
2) The relevant standard if any?
Thanks!
KIRIBANDA
We everybody know that protective relay characteristics curves (Normal, Inverse, Very Inverse and Ex. Inverse etc) are defined as ANSI curves (IEEE C37.112) and IEC curves (IEC 60255).
Then what are "IAC" relay curves. Could anybody explain
1) For what does IAC stand for?
2) The relevant standard if any?
Thanks!
KIRIBANDA






RE: IAC Relay Curves?
RE: IAC Relay Curves?
Regards,
Raisinbran
RE: IAC Relay Curves?
This is the code selected by the manufacturer for the electromechanical family of time inverse. Probably means Inverse Alternate Current (IAC) See the enclose links.
http://ww
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2.- The relevant standard if any?
Relays manufacturer are not required to comply with standards in this matter. However, most manufacturers facilitate relay coordination by using the standard values as shown in the enclose sketch. See IEEE and IEC standards for additional details.
RE: IAC Relay Curves?
from
ht
You can test this (and several other) curves with the power analysis program downloadable at
http://pp.kpnet.fi/ijl
RE: IAC Relay Curves?
Thanks a lot for all your answers. It is a very valuable forum to be in touch always.
Cheers!!
Kiribanda