I2T time curve 1

[cunin]

Hi
Could someone please give me the math formula for a I2T relay time curve. I would very much appreciateate it. Thank You.

 

[jghrist]

I²·t=C

 

[davidbeach]

Yep, what jghrist said.

 

[ScottyUK]

Do you mean the formulae for the various inverse O/C curves? The page in the link below is from the Alstom NPAG book and shows both the IEC and IEE curves.


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If we learn from our mistakes I'm getting a great education!

 

[cunin]

yes scotty this is what i was looking for. I am looking at a cordination study that uses i2t curves. looking at the curves, settings, and test points, something is wrong. Back to the old slide rule. Thanks again for the help.

 

[slavag]

Hi Cunin.
Why you use term i2t curves?
It's confused us. If you need additonal information to Scotyy's post, lets know. I can send to you full math formulas of IEC and IEEE curves.
Best Regards.
Slava

 

[slavag]

OOPS.
Scotty, sorry for mistake in your name :-(.