Stupid question , but this looked like the place to ask .

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Ok , I aquired 3 transformers but have no ideal what to do with them or if they would be of use to anyone in the DIY Audio field. They are brand new , never had power ran through them , atleast not since they left the factory if they were tested there . They were pulled from brand new APC ups backups , there were 4 of them and when they came in the tech. guy paid no attention to the box and just pluged the first one up , pluged in a new dell comp , on came the power and off went the dell and the ups . Then he looked and found out that they were made for overseas and not the US so were 220v ac not 110v ac .APC replaced all 4 and said dispose of them . So The tech guy pulled out the batteries and a few other things before disposing of them but I got the transformers . So they should be 220v stepded down to 110 120 he thought the board was stamped 120v . anyway they weigh about 5lbs each and are marked

430-0147 REV .1
CLASS B (130 C ) Z 150 H
LEI-4 E154515
3J23

There is 3 wires
1 black 1 red 1 white the black and the red has a blue boot over the female spade end and the white has a clear boot . I assume the black and red is 220v in and the white is 120 v out as it shows I know nothing about these .

So back to the original question , are these something there would be a use for and or what value would they have ? I don't know of any use I'd have for them so thought of offering them as a sell or trade item on the Trading Post here or the dreaded E-bay if its worth it .
Any advice or suggestions?
 
Not the best picture but I think you can figure out my measurements and read the info on it.
 

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I have one almost exactly like it (serial and model #'s seem to be the same)...came out of an APC Backups. I am not sure of the voltages yet, I have not really done any testing yet, but if you are still looking for info on it, you can email me directly, or if you have more info on it, please send me some data.

I am hoping that it will be usefull in a future power supply project.

Thanks,

Wayne Boyd
 
E154515 LEI-4 Transformer

I typed in E154515 LEI-4 in Google and it led me to this forum!!

I needed a hefty transformer for a project and found this in my basement. I had forgotten where it came from but one of the replies indicated it was from a APC UPS. That reminded me! I stripped it out of a BK500, I think it was, a year or so ago.

Anyways, I took it to work today and hooked it up to a Variac and came up with the following:

Primary:

Black & White
(lighter guage wires than secondary)

Orange - probably a thermal sensor. just ignore.


Secondary:

Blue & Brown - 18 VAC (Approx. 20 V, unloaded)

White & Red - 12 VAC (Approx. 14 V, unloaded)
Black is the center-tap.

I loaded it down to over three amps and the voltage only dropped to about 13 Volts. It appears to have more than ample current output for my needs.


Good luck.
 
APC UPS Transformer markings

I was able to procure 5 older APC UPS's and gutted 3 of them. I have also downloaded the pdf schema's for them also. List and measurements as follows:

#3 APC) Backups 200DL / mfg date - 1988
#1 APC) Backups 250 / mfg date - unknown
#2 APC) APC Network Powercell 400W / mfg date - 1991

#1 marked: 430-2002 EIA 549-9119 Class 130 B Mexico
(measured: 2R5 and 120Vrms on pri. / R1-R1 and 8-0-8Vrms on sec.)

#2 marked: 430-0023 and 549-9137
(measured: 2R6 and 120Vrms on pri. / R2-R2 and 8.23-0-8.23Vrms on sec.)

#3 marked: 430-2003(3) EIA 549-9308 Midwestco Mexico
(measured: R9 and 120Vrms on pri. / R1-R1 and 8.44-0-8.44rVrms on sec.)

Now with 3 gutted APC UPS's and currently awaiting my most profound [insert bright idea] circuit of all time! I can use 3 of these 120V=>8V EI transformers to RULE THE WORLD!!!:devily:

There seems to be one problem. :scratch: Now how do I accomplish that with 3 of these?
 
@fortuosity

were the lugs soldered to the T/F connected to the battery??

Then my guess is that they are the step up t/f for the batter backup section of the UPS.

The 12V DC -220V AC

the primary( which would have a thicker wire dia) would be rated for approximately 7.5 V and the secondary for about 240V or so.

But as i said this is applicable only if the Lugs are attached to the battery.

If the UPSs were marked as 500VA UPS then the T/Fs can deliver about 350 watts comfortably @ 220V.

You could use it as a 12v - 220V step up or as a 110V - 7V step down t/f

If you still the UPS intact then all you need to is to get the T/F rewound and you can have a functional UPS @ 110V

I d be glad to be of help to help you redesign the T/F.

You can get the very same T/F rewound and use them in the UPS.
 

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That last pic showing wht/red/blk could be the mains input. But, I am not sure.
The brn/brn/red/blk could also be mains input. The very thin wires are an indication these are rated for the lowest current. They also appear to be the deepest towards the core. Again an indication that they could be mains.
Confusing is that both possible options seem to have a twisted common feeding the winding. This virtually commits a dual primary for use only on the higher voltage mains supply.

Use a bulb tester if you decide to connect to the mains to carry out any testing.
 
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Any chance of a simple wiring diagram? I wouldn't want to sent my workbench ablaze! I already angered the wife blowing up a capacitor while learning about them!

You've got the transformer.. :D

Read the high voltage safety thread in the Tubes/Valves forum before proceeding.

Get a meter and measure the dcr of each winding. I'll surmise, possibly quite mistakenly that the black and white wires are the primary, not sure what the orange wire is.. Make yourself a ballast lamp with a 60W bulb (search the forum for details) and connect it in series with the primary.. Make sure everything is well insulated - if you have an isolation transformer make sure to use it. Then measure the voltages across the various secondaries.

Note that this transformer isn't probably going to be that useful unless you want to build a 12V supply to run a car radio or similar..

Be very careful, high voltages are present. Electrocution is easy and so permanent. :hot:
 
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