Transformer Winding: Identify Primary & Secondary Wires (230/24V 2.5A, 2 Red, 2 Black)

Question

Hello, I need a quick and reliable answer. I have a 230/24 V 2.5A transformer and 4 wires come out (2 red and 2 black). I have no idea which of the wires goes to the primary winding and which to the secondary winding. By its name is written 230V voltage next to it is written black, it is not...

czareqpl · Answer

As a rule, the primary winding will have thinner wires and their resistance will be higher. Try to measure with a meter.

MDD · Answer

As you are sure that 230V on 24V is thin 230V and thick 24V. If you have no clue, be careful with that.

viayner · Answer

Hello,
- resistance measurement but no meter but the meter is the basis
- thinner wire is usually from the primary winding but not always transformers for tube devices but this case does not occur.
- with a 50VA transformer, the primary winding is 0.2mm wire and 1-1.5mm secondary wire
- you are interested in the winding wire on the body and not the lead wires, although these should also be appropriate.
Regards

vodiczka · Answer

All you need is a 40W / 230V light bulb connected in series with the transformer winding. Secondary it is in combination with which it shines brighter.

czareqpl · Answer

Nice method. I would add far-reaching caution to stay away from the second pair of transformer wires when checking The differential will not work ...

aksakal · Answer

If you do not have an ohmmeter, then you can connect the transformer to the network through a 230V 40 - 100W light bulb. The original winding will be the one when turning on the light bulb to turn on, and for a part of a second the brightness will decrease to barely noticeable. When connecting the secondary winding to the network, the bulb will glow bright all the time.

niewolno2 · Answer

Just connect 24V to one of the windings and the matter will clear itself.
If you supply 24V on the secondary winding, then the primary voltage will be about 230V, and after feeding 24V on the primary winding, you will have a significantly low voltage on the secondary side.

kortyleski · Answer

You only need to have a meter.

niewolno2 · Answer

Without a meter it's not a job.

W.P. · Answer

I only have small 3 grosze ... Term primary and secondary is not permanently assigned to a specific winding. The primary is the winding, which we power the transformer with, from the secondary we receive energy. So everything depends on the connection.

vodiczka · Answer

My opinion is and is at the transformer design stage. The fact that you can reverse the winding in some cases without damaging the transformer does not mean, for example, that you do not violate its safety class.

Szweduu · Answer

Thanks for the answers. Regards

Transformer Winding: Identify Primary & Secondary Wires (230/24V 2.5A, 2 Red, 2 Black)

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