Register to reply

Calculate the transformer parameters

by fred2028
Tags: parameters, transformer
Share this thread:
Jun21-11, 07:47 PM
P: 19
Question basically asks to find the parameters of a transformer via an open circuit and closed circuit test. We were taught that for OCT,

V = (I * cos(theta)) * R
V = (I * sin(theta)) * X

To find the core losses. This makes sense, since we are only using the component of the current that is parallel to the real and imaginary impedances. However, for the SCT, we were taught

P = I^2 R

Wouldn't it be more logical to use

P = (I * cos(theta))^2 * R

since P is the real component of S, and therefore we should use only the real component of current I?
Phys.Org News Partner Science news on
Scientists develop 'electronic nose' for rapid detection of C. diff infection
Why plants in the office make us more productive
Tesla Motors dealing as states play factory poker
Jun21-11, 09:57 PM
HW Helper
P: 6,202
In the SCT the R and X would be in series so the same current at the phase angle of zero would be passing through both R and X.

Register to reply

Related Discussions
How do you calculate the lattice parameters c and a of Hexagonal ZnO Atomic, Solid State, Comp. Physics 7
Transformer parameters Electrical Engineering 3
How to calculate parameters of shifted exponential density from a set of measurements Set Theory, Logic, Probability, Statistics 1
How to calculate lattice parameters? Atomic, Solid State, Comp. Physics 8
Calculate Cd and Cl of wing with these given parameters: Engineering, Comp Sci, & Technology Homework 0