Transformer data

[hubble]

Hi, I have an image of the transformer and I need to understand the data written on it. It seems to have three secondary windings. Here is the photo:



What does this S1+S2=15V? Is the 15V shared between these two windings or is it the voltage rating for an individual winding? Is it same for the current rating as well?

Thanks.

[Hero999]

I agree, it's confusing. The transformer appears to have four windings: a 24V primary and three 15V secondary windings, two rated to 15mA and one rated to 40mA.

[hubble]

Thanks Hero999. Can you tell me where I can find these types of transformers? This transformer is used in a control card of a weaving machine. Also, is there a way to know which pins correspond to which secondary? I mean which secondary is rated to which current? All I know about this transformer is 1-2 is primary, 3-4 no pins, 5-6, 7-8, 9-10 are three secondary windings.

[Hero999]

Thanks Hero999. Can you tell me where I can find these types of transformers?

It's not a standard part. Most transformers have mains voltage primary (typically 110V or 230V) not 24V.

This transformer is used in a control card of a weaving machine. Also, is there a way to know which pins correspond to which secondary? I mean which secondary is rated to which current? All I know about this transformer is 1-2 is primary, 3-4 no pins, 5-6, 7-8, 9-10 are three secondary windings.

Yes, it should be easy to measure them with a multimeter: the secondary with the highest current rating should have the lowest DC resistance.

[hubble]

Thanks Hero999. I am going to try measuring the DC resistance and find which secondary has the highest current carrying capacity.

Thanks again.