Auto transformer help

File: a5L3Y0JniWQ.jpg (572KB, 1613x2160px) Image search: [Google]

572KB, 1613x2160px

>>1073441
here are the connection terminals

File: lkrKLlsQWEM.jpg (589KB, 1613x2160px) Image search: [Google]

589KB, 1613x2160px

>>1073442
>>1073441

>>1073441
nice find.
use an ohmmeter and find the coil that doesnt change when turning it, that would be the primary.

the output would be the others i assume.

keep in mind that autotransformers are not isolating like normal transformers, therefore one phase of the output is common with one of the inputs.

i would GUESS
>>1073442
is your input, pick the one that matches your line voltage
>>1073444
is your output, s stands for sweepy thing?

look at he diagram
>>1073441

but i take no responsibility if this is wrong.
use a low value circuit breaker or fast blow fuse or a lightbulb? as a current limiter if you are having a play.

File: image.jpg (2MB, 3264x2448px) Image search: [Google]

2MB, 3264x2448px

Your primary is your input side. Wire it to the terminal matching the voltage you're putting in. Line (Black wire) to 125 or whatever, neutral (white) to 0 on the high side. The low side will change voltage (and wattage indirectly so be carful) as you sweep the armature up or down. Look for where the armature contact rubs across the windings, if there is any areas that look melted or fucked up, clean off any shorted areas with a scour pad or a screw driver if it's really bad. Each section of exposed winding conductor needs to not touch the others.

>>1073444
>>1073442
>>1073441
That's a pretty cool resistor you found

>>1073605
>resistor
Lolno

>>1073739
that's not a resistor, thought i suppose you could use it as one.
an extremely low resistance,high inductance high wattage rheostat.

its actually a variable auto transformer, the common generisicm is Variac.
this non isolated transformer allows you to dial ac line voltage from 0 to full mains.

useful for slowly ramping up the juice in prototypes and dubious equipment, among other things.

i use mine for my tube amp prototypes.

>>1073926
meant for >>1073605

op probably figured it out and never posted back.
dubs if he is dead