IAC11 information/TCC 3

[Eleceng01]

I have already contacted my local GE rep, but no response from him yet. I was hoping that someone could help me with information on a GE IAC11 relay. Specifically I am looking at coordination and I really need the TCC for such relay.

Thanks in advance for any assistance with this - hoping someone has even heard of it (totally new one to me).

 

[davidbeach]

Sure that it is an IAC11? Lots of IAC relay instruction manuals available but the lowest number is an IAC51. Could it be an IAC77?

 

[ijl]

See

http://pp.kpnet.fi/ijl

The program contains several relay curves, among them the IAC11 as an electromechanical relay. The curves can be written out pointwise as a text file.

 

[Eleceng01]

david, I Googled it and found one for sale via a used equipment company so I believe the part # is correct. It also appears from ijl's response that they do exist.

 

[davidbeach]

OK, I thought I knew were to find most any GE relay instruction manual. I guess it is less than complete.

 

[cranky108]

The IAC11 is a very old relay and probally needs to be replaced.

 

[Eleceng01]

david, can you share your source?

 

[davidbeach]

http://www.geindustrial.com/cwc/Dispatcher?REQUEST=PRODUCTS

and scroll down to "Relays - Protective". Pick your relay type (Overcurrent, etc.) and then the specific relay model. At that point the literature links are along the left edge.

 

[oldfieldguy]

cranky--

Why replace it? If it's cleaned and maintained, it is perfectly able to perform as on the date it was first installed.

I know of many electromechanical relays in service over sixty years and they still perform to the manufacturer's specifications.

Granted, it doesn't have digital communications, keypads, digital displays, or metering functions but somehow we managed to power the planet without microprocessors.

And You'll NEVER have to worry about having the latest firmware revision.





old field guy

 

[cranky108]

Consiter that repair parts would be difficult to obtain, if they are available at all. And that if the relay were found bad during testing it is always a mad scramble to fix or replace.
It's a good forward thinking to at least prepare for the eventioul failure, or better to replace the relay with a relay you can quickly get parts or a replacment for.

In my case, I replace older relays because it affords a reduction in the cost of testing.

You don't keep a model T Ford because it still works, you keep a model T Ford because you want to.

 

[Eleceng01]

Thanks again everyone for your help. I have managed to get the curves for the IAC11 and some other older GE relays and I thought I would share. Hope you find them useful.

 

[dpc]

eleceng01,

Thanks for posting this.

dpc