HOW TO TRANSFORM OF DELTA CIRCUIT TO STAR CIRCUIT

How to transform of delta circuit to star circuit - To calculate the resistor circuit complex sometimes we encounter a series in the form of Delta, so that the resistor circuit can not be completed. An easy way to solve it by changing the circuit Star delta into a series of substitutes as shown below.

How to transform of delta circuit to star circuit

Process of transformation from circuit to circuit star delta is as follows:

Note the points 1-2 in the picture above! 
Barriers point 1-2 in the series delta should be the same as barriers to the 1-2 series star point so we get: 

Rp + Rr = Ra // Rb + Rc + sign stating the series while a parallel // states.

Or can be written:

Equation 1

at the point 2-3

Equation 2

  

At the point 1-3

Equation 3

Elimination equations 1 and 2:

Elimination equations 1 and 2

Elimination equations 4 and 3:

Elimination equations 4 and 3

Substitute into the equation 4:

Subtitute into the equation 4

substitute the result into the equation 2:

substitute the result into the equation 2:

Summary :
of the above series of images obtained results: 
 

Summery

 Note:
the above equation is strongly influenced by the position of R in the figure, if the indexing an image to be replaced, then permasaan must be adjusted again with the new image.

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