retapping transformer

[rkalstad54]

im retapping a single phase transformer from 240 to 480 do i also have to change the secondary side too?

 

[hbiss]

If you are no longer supplying the transformer with 240 and want to supply it with 480 and that's why you are changing the primary tap, answer is no. The secondary voltage will remain the same.

-Hal

 

[LarryFine]

Need more info. If you're rewiring a 240/480v primary from 240v to 480v, and supplying it with 480v instead of 240v, the secondary voltage should remain the same.

 

[rkalstad54]

If you are no longer supplying the transformer with 240 and want to supply it with 480 and that's why you are changing the primary tap, answer is no. The secondary voltage will remain the same.

-Hal

thanks

 

[MD Automation]

Just to be clear - if I understand what you are doing - you are not re-tapping this transformer. Like Larry says above, you are likely re-wiring the 2 primary coils (previously connected in parallel at 240 VAC) to run them in series at 480 VAC. Which should have no effect on the secondary voltage created, it will remain the same.

Taps on primary coils are typically in 2.5% steps and would not, in general, exceed 10%.

Not looking to be a jerk, just pointing out the correct description of the work.

Apologies in advance if you have a really odd transformer.