Post
This post was translated, if you want to see the original version click here
Transformer power with central tap
I have a toroidal transformer with central branch whose label says 38.5 - 0 - 38.5V 220VA, this means that between the ends of the winding there are 77V. It also has two smaller windings of 10VA each. My question is whether to calculate the maximum winding current of 38.5 I use the formula 220VA / 38.5A or if it is used is all the winding voltage that is 220VA / 77V?
Thanks in advance
Thanks in advance
Score0
Created 1 month ago
44
1 Proposed Solution
Score0
Created 1 month ago
3410
-
Correct thanks. For those who have doubts about the units are well written. 38.5 Volts, 220 Volt-Ampere.
See question in: Potencia de transformador con tap central
1 month ago
There is a lot of confusion in the units you have used
V - VA -A are not the same thing
Review your question and correct it with the exact data
By dividing the primary voltage over the secondary voltage, you will only get the transformation ratio, not the power but there are doubts since if what you put are "220V" is primary voltage, instead if they are "220 VA" it would be the power of the transformer
1 month ago
Upload a clear photo of the label and save confusion (or not).
1 month ago
It is 38.5V (Volt), 220VA (Volt-Ampere). The formula that doubted the current is whether I = 220VA / 38.5V or I = 220VA / 77V is calculated. But it is already clear to me that it is 220/77 which is the power of the label on the voltage between the ends of the secondary (secondary with 38.5V dual or 77V end to end). Thank you