Discovering Toroid Secondary Voltages

vdi_nenna

Member
Paid Member
2000-10-10 7:27 pm
PA, USA
I have 3 Amveco toroids, but Amveco won't tell me what the wire color codes are because these toroids were custom made and do not disclosed this info to 3rd parties.

What's a safe way to test toroid transformer secondaries not connected to a circuit? It has several secondary taps. It can be wired as 28v or 15v at 4.67 amps.

I want to wire it for low volts and high current, but not sure what wire goes where.

Thanks,

Vince
 

jnb

Member
2006-12-30 11:55 pm
First, use your ohmmeter to find what's connected to what, and draw a wiring diagram.

Then, run a low voltage to the primaries. You can use a spare amp to feed it, for example 60Hz 12V (or whatever is one tenth of your outlet voltage), then multiply your secondary voltage readings by 10.