# regulation of a transformer

#### simon

Joined Apr 26, 2004
6
Hi all, i have a question:

The regulation of a transformer when supplying a load can be approximated very closely by the equation:

V1  V2 = (I)(R2eq)Cosφ + (I)(X2eq)Sinφ

Where,

V1 is the secondary open circuit voltage
V2 is the secondary load voltage
Cosφ is the load power factor
R2eq and X2eq are the transformer total resistance and reactance refered to the secondary.

Determine the load power factor conditions that will make this regulation a maximum. How does this relate to the transformer impedance?

Also determine the load power factore conditons that will make the regulation zero. what will happen if hte load power factore decreases below this magnitude?

#### mozikluv

Joined Jan 22, 2004
1,437
hi,

"Determine the load power factor conditions that will make this regulation a maximum." Ans. Draw more current

"Also determine the load power factore conditons that will make the regulation zero." Ans. In real life there's no such thing as 0.

"what will happen if hte load power factore decreases below this magnitude? " Ans.
you will have so much voltage and current but you don't have power.

<_< -_- 