Liquid Rheostat

[Jnox]

We have a 6k, 6.9kV Rotor Would Indiction motor that was probably built back in 40's. It is connected to a Liquid Rheostat control that is probably just as old as the motor.

There isn't too much documentation on the liquid rheostat. Does anyone know where I can find some good information about the operation and maintenance of a liquid rheostat?

Thank you!

 

[ozmosis]

Do you know the make?
I used to come across an electrolytic starter made by a French company called AOIP. I used to come across them in quarries etc where the maintenance was very much lacking-they went on forever and so nobody tended to know much about them-apprentice quarry tech's would 'top them up'.

http://www.aoip.fr/us/epm.html

 

[roydm]

The good news is they are still manufactured, I found a web site you might find useful.

http://www.lmpforum.com/inforum/Fixed-Electrolytic-Liquid-t2290.html

It seems the common electrolytes are Salt/Water of Caustic Soda/Water.
I expect you will be able to refurbish it and it will still be good to go in 2040
Good Luck
Roy

 

[dpc]

http://www.flomatcher.com/liquid.htm

Check with these guys.

 

[Jnox]

Thanks guys! I will read through it and see if any questions come up!

 

[gepman]

I recently designed a system at a cement plant for a crusher with a liquid rheostat. I used Eletele at the recommendation of the cement plant. They already had one which worked well. Eletele was quite easy to work with and no real language barrier.

http://www.eletele.com.br/Reostatos_e.htm

I checked with flomatcher also but their unit is designed specifically for variable torque loads and variable speed rather than constant torque loads with high inertia like crushers and shredders.