LIQUID RESTISTANCE STARTER
LIQUID RESTISTANCE STARTER
(OP)
H ow do you determine the type of salt solution to put in a liquid resistance starter (slip ring)
The motor in a 415v 230KW Rotor volts 559 rotor amp 275
The motor in a 415v 230KW Rotor volts 559 rotor amp 275





RE: LIQUID RESTISTANCE STARTER
would reccomend a sodium solution rather than salt.
kind regds.
RE: LIQUID RESTISTANCE STARTER
The Na is a metall, if you dissolve it
you create a compound e.g. salt.
Don't try to put sodium in water !!!!
Use sodium hydroxid. (caution, caustic)
<nbucska@pcperipherals.com>
RE: LIQUID RESTISTANCE STARTER
kind regds
RE: LIQUID RESTISTANCE STARTER
Is it possable to measure tank liquid resitance when full and do a calculation to determine current draw.
RE: LIQUID RESTISTANCE STARTER
Simply, the rate of change of fluid temperature versus acceleration time seems like the biggest unknown. Six gallons of a salt solution, 559A 3ø, time to acceleration of a ‘large ring mill crusher’ and resistor energy dissipation (a/k/a fluid state change) may not result in stable operation, making it infeasible. Sorry, but defining anything for “area under the curve” integration is out of my league. I’d take advantage of increased physical isolation during starting.
The span between 1.5x inrush and stalling could be narrow (or negative; ie, not possible.)
RE: LIQUID RESTISTANCE STARTER
kind regds
RE: LIQUID RESTISTANCE STARTER
RE: LIQUID RESTISTANCE STARTER
kind regds
RE: LIQUID RESTISTANCE STARTER
enough to accelerate.
The "resistor" looks like a large variable capacitor--
multiple stator and rotor plates.
You may have to provide cooling if you start often.
I think Na2Co3 will be converted to NaOH by electrolysis
anyway which will increase the conductivity.
<nbucska@pcperipherals.com>
RE: LIQUID RESTISTANCE STARTER
Is the resistor fluid in an open vessel? Can you turn a "knob" to adjust the "capacitance"/resistance?
Won’t the CO3 will reduce to OH, because of heat? Not sure about electrolysis with alternating current.
RE: LIQUID RESTISTANCE STARTER
25 l may be enough if you have time between starts to cool down. Even without cooling, you may loose some water but
one start won't boil away 25 l ! You mey have to add destilled water more often...
Open vessel, you may turn it. I have seen one when I was a kid...
Electrolysis with AC is slower and less effective . The bubbles which are large enough bubble out, the very small ones dissolve back ,when the current changes direction.
<nbucska@pcperipherals.com>
RE: LIQUID RESTISTANCE STARTER
RE: LIQUID RESTISTANCE STARTER
hope to have trial start of motor next week with no load.
RE: LIQUID RESTISTANCE STARTER
Yes, it has a number of interdigitated stator and rotor electrodes.
The CO3 solution can heat up only to about 100 C --
it is not high enough to disintegrate it.
The NaOH adsorbs some CO2 but I suspect most of the
solution remains hydroxid.
<nbucska@pcperipherals.com>
RE: LIQUID RESTISTANCE STARTER
Thank you for the follow up, nbucska. It makes sense that excessive energy release would have to accompanty a state change.
RE: LIQUID RESTISTANCE STARTER
Cheers from QLD
RE: LIQUID RESTISTANCE STARTER
http://www.mdresistor.com/mdus/resistancespointneutreus.htm
http://www.rabin.com/site/Auction.nsf/WebAnnounce/2E3FCA7E18BDB16788256B14000163A5?OpenDocument
http://cmcltd.uhome.net/
(specific data available)
http://rftechnologies.net/sys/standard.htm
http://rftechnologies.net/sys/load.jpg
etc. for more info