Transformers in series OK?

speakerfritz · 2nd March 2011, 06:15 PM

Hello all. I need a small current 360V transformer. Can I use 3 120V transformers in series? Each transformer will only see 120V so I won't have to worry about dielectric insulation breakdown correct? The 3 transformers are 1:1 at 1.5 VA. If I put the primaries in parallel and the secondaries in series would I get 4.5 va or .5 va ?

bob91343 · 2nd March 2011, 06:17 PM

All is correct except your statement about insulation. Having said that, you aren't dealing with enough voltage to worry about insulation. And yes, 4.5 VA.

2nd March 2011, 06:15 PM	#1
speakerfritz diyAudio Member Join Date: Jul 2008	Transformers in series OK? Hello all. I need a small current 360V transformer. Can I use 3 120V transformers in series? Each transformer will only see 120V so I won't have to worry about dielectric insulation breakdown correct? The 3 transformers are 1:1 at 1.5 VA. If I put the primaries in parallel and the secondaries in series would I get 4.5 va or .5 va ?

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2nd March 2011, 06:17 PM	#2
bob91343 diyAudio Member Join Date: Mar 2010	All is correct except your statement about insulation. Having said that, you aren't dealing with enough voltage to worry about insulation. And yes, 4.5 VA.

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