Hi,
I've got a schematic with a transformer in it, and there are a some numbers next to the wires leading into and out of the transformer. What do these numbers mean?

 

Can you give us another clue?

John

 

Probably numbering of wires on the physical transformer, or winding ratios.

 

Be a bit easier to tell with the numbers to see.

 

This is what it looks like

 

Those are terminal numbers.

 

What does that mean?

 

Terminal numbers are the numbers assigned to the wires coming out of the transformer, and the terminals they are soldered to.

 

So it doesn't say anything about the winding ratios?

 

No it doesn´t. Maybe the rest of the circuit can help with that.

 

Something else that came to mind: what does it mean if a transformer says 30-0-30V on it?

 

It means that the secondary is center tapped, with an output of 60 VAC. That doesn't say anything about current, though.

 

If you can find a Part Number or Model Number for the Transformer, you can look up the specs or technical data for it.

 

i want to use step down transformer for 230 v ac supply.so what factors should i consider?