This document discusses the star-delta (T-Π) transformation technique for solving complex electrical networks that cannot be solved using simple series-parallel methods. The star-delta transformation allows conversion between a star (T) connection and a delta (Π) connection. Formulas are provided for both delta-star and star-delta transformations to calculate resistances in one configuration based on the resistances in the other. The transformation technique can be used to solve complex networks by converting them to an equivalent configuration.

1. DEPARTMENT OF PHYSICS

2. STAR – DELTA TRANSFORMATION
Dr. Vinika
PROFESSOR
DEPARTMENT OF PHYSICS
Sanskriti College , Jaipur
Nishant katara
Student
B.SC. (H) CHEMISTRY

3. STAR – DELTA TRANSFORMATION
 also known as T- ∏ transformation.
 they are some complex networks whose equivalent
resistance can`t be found by using simple series –
parallel technique.
 to solve such complex networks , star-delta (T- ∏ )
transformation technique is used.

4. STAR (T) NETWORK

5. DELTA (∏) NETWORK

6.  USING T-∏ TRANSFORMATION ,
T - connection can be converted into ∏ - connection
OR
∏ - connection into T – connection

8. DELTA – STAR TRANSFORMATION

9. R1 = RaRB / Ra +Rb +Rc
R2 = RaRc / Ra +Rb +Rc
R3 = RbRc / Ra +Rb +Rc

10. STAR – DELTA TRANSFORMATION

11. Ra = R1 + R3 + R1 R3 /R2
Rb = R1 + R2 + R1 R2 /R3
Rc = R2+ R3 + R2 R3 /R1

12. THANK YOU
Department of Physics
Sanskriti college , Jaipur
www. Sanskriticoolege.org