question on step-up transformer

[Nicholas]

nicholas step up transformer

I read in NEETS that a step-up transformer of a 1:3 ration will trans an ac voltage of 115V in RMS into an ac voltage of 345 in PEAK to PEAK.

Is it right? Why RMS vs. PEAK to PEAK? Not RMS vs. RMS or PEAK to PEAK vs. PEAK to PEAK?

thanks.

Nicholas

 

[barrybear]

question step up transformer

You must remember that you do not get anything for nothing ie double the voltage half the current ( transformer theary).

Barrybear

 

[Nicholas]

ac transformer stepup 1:3

You must remember that you do not get anything for nothing ie double the voltage half the current ( transformer theary).
Barrybear

I know that. But just the voltage I mention here. Thanks.

Nicholas

 

[flatulent]

Something is wrong. Mains transformers of good design are over 97% efficient. The turns ratio sets the voltage ratio and current ratio all in the same units.

 

[echo47]

Sounds like a typographical error. A 1:3 step-up transformer will convert 115V RMS into 345V RMS (or 115V P-P into 345V P-P).