What is VA rating Available at secondary side of the Transformer?

[message4guru]

Respected All,

What is VA rating Available at secondary side of the center tap Transformer?

 

[betwixt]

It's what ever the manufacturer says it is. You design for the VA rating you need.

Brian.

 

[D.A.(Tony)Stewart]

This WAS a simple academic question.

If a center tapped secondary outputs 12Vrms at 5A into resistive load

then what does the split pole (Pole to center tap) output in power

6Vrms*5A = ?

 

[message4guru]

Respected Sir,
It is 6*5=30 watts(VA) but can i with draw 10 Ampere ( 6V*10A=60 amps) because i am Loading Only 6V. Then I can efficiently use the transformer. Other Wise my efficiency is 50% when it is 6V*5A.

 

[KlausST]

Hi,

There are transformers with 4 secondary side connections, then you may parallel connect both secondary windings to get 6V, 10A.

But it seems you have 3 connections only, then this is not possible. Then use one winding only, with 6V, 5A.

But efficiency is not 50%. Efficiency = P_out / P_in, which will be more than 85%.

Klaus

 

[betwixt]

This WAS a simple academic question.

Sorry Tony. The original post had no PDF attached to it so it wasn't specific to any transformer type!

Brian.