Issue resolved!
Thanks a ton...
122V without load, absently forgot to measure under load. 2 desired units - A battery charger and small refrig compressor pulling 5.3A
Spectacular!
Thanks Scotty and the confirmation waross!
I figured just there was a relatively simple solution with the available taps...
jraef, I'm reading the input 250 on a panel meter verified by a DVM with an average 10A load on a 50A circuit... The secondary voltage was indeed just...
Hi ScottyUK,
I can definitely live with 1/2 the power no problem. Powering several small items that don't need to be running at the same time...
Thanks!
Well not really... I need to drop 240 to 120. The transformer is doing precisely what it is supposed to do. My input voltage of 250V is giving me an output of 136V, far too high for my comfort! Definitely my fault for casually picking out a transformer and not thinking about my higher source...
Lionel,
The original numbers are arbitratry clock orientation....
IntegrityTesting (Mechanical)
All of these insulated leads are attached at the outer edge of the windings, clock orientation:
A=4&10
B=2&8
C=6&12
11&1&3 connected
5&7&9 connected
10&1
11&2
12&3
4&7
5&8
6&9
waross (Electrical)...
Nooooooo..... I broke connections for 4-7, 5-8, 6-9 on the interior windings, connected like numbers and led them all out.... It was wired high... This is not rocket science....
Some Closure to this post...
I ended up rewiring the motor leads myself on the 20 HP motor, and everything works perfectly... There's something wrong with the 25 HP motor... It was simply pulling too many amps to just run a silly 10HP compressor...
NLA of the 25 was 35-37A with 250mfd caps on...
It must be amusing to see the light bulb go off on such a simple concept huh???
I mean, I can do some math that would make you pass out...
Build or fix something that would make you blink...
This was simple... I made it hard...
Thanks for all your help...
I got this man!
Ed
THIS IS GREAT!!!!!!!!!!!!!!!!!!
EXACTLY what I was looking for.... I think (meaning if I understand this).... The lead connection I have down pat… You can speed quiz me later on wye/delta/hi/low terminal connections…..
So... If I have this right... I can pick ANY arbitrary reference point to...
A 10hp, 230V single phase motor is rated at about 60A per phase. You're running this phase converter motor and the 10hp compressor motor and drawing 60A per phase. What exactly is the problem with 60A?
You obviously did not have a 230V/460V motor if you had to get a shop to re-connect it to...
Roll the leads to check for an unsymmetrical internal connection.
Bill
Thanks Bill... I assume you mean try every possible L1/L2 to A/B/C combination and check for current differences? OR... Did I miss the mark completely... (and possibly the entire target range)?[surprise]
My contactor went...
It may be helpful to identify the poles. First, find each pair of leads with continuity. Next, apply DC to each pair in turn and use a battery to identify location and polarity of the poles.
One of our winding experts will give you more specific instructions.
Typo: I meant to say;
"Use a...
Hi All,
I have a few other related posts here, but kept them separate for simplicity...
Basically I had a dual voltage 230/460 25hp motor that I was trying to utilize as an idler motor for a phase converter. The motor only had 3 leads led into the junction box... When I connected it to 220...
I Scotty
I read up a little bit, and being an ME helped with my vectors! I'm getting this a bit more, but still have a problem with the idle current jumping by a factor of 10 when all I did was have the motor rewired for 1/2 the voltage.... Luckily, the power meter for the main is right next to...
Hi Bill...
Thanks for your help!
Yes... Those are my arbitrary tags specifically labeled by traditional clock orientation... There are only 12 lead take-offs from the rear of the windings, and only one per "clock position"... I'm not sure if this was supposed to be a 12 or 9 lead motor, but I...
Hi ScottyUK,
Thanks for your help!
I'm of course running this 3 phase motor on 2 phase power with obvious 180 degree phases... I understand that hooked to a proper 3 phase source, it should draw the 67A under full load... It just seems like the 35A to turn this thing with absolutely no load on...
I also have a 220/440V 20 HP motor I think is permanently wired for 440... I pulled the back cover and the leads away from the windings and this is what I get...
OK... Pulled the back of the 20 HP apart...
All of these insulated leads are attached at the outer edge of the windings...
Hello all, and thanks for your help!
I'm running a 25 HP 3 phase converter on 230V/200A service and have some questions... Initially my motor 230/460 was permanently wired high. Unknown, it was connected to single phase 230 after being spun up by a pony motor. It ran fantastic, and only...
