Star & Delta Connection

Describe the Basics information of star & delta connection

1. Table of Contact : Introduction Symbols of Star & Delta Connection Star & Delta Connection with power Supply Star & Delta Connection in Motor of 3 phase The difference between Star & Delta Connection . The Relationship between (I & V) in Star & Delta Connection Examples Quiz

2. What are Star & Delta Connection ? Why we need to use Star & Delta Connection ? I N T R O D U C T I O N :

3. Symbol of Star connection : Symbol 1 Symbol 2

4. Symbol of Delta connection: Delta Symbol

5. Star & Delta connection with power source

6. Connect Star & Delta connection in Motor of 3 phase

7. The difference between Star & Delta connection Star Connection 1- Use for low voltage 2 - it give : 220 v , 380 v 3 - There is a Neutral or star point Delta Connection 1- Use for High voltage 2- it give : 400v or more 3 - No Neutral point in delta connection

8. The relationship and laws between I & V in Y & Δ connection Star Y Situation V line = V phase x I line = I phase Delta Δ Situation V line = V phase I line = I phase x

9. Table of laws between Voltage, Current , in Star & Delta Connection Name: Formula: Unit: Symbol: Line Current ( Y ) IL = Iph Ampere A Line Voltage ( Y ) VL = Vph x √3 Voltage V Line Current ( Δ ) IL = Iph x √3 Ampere A Line Voltage ( Δ ) VL = Vph Voltage V

10. EXAMPLE ( 1 ) Q1 An electric motor has voltage phase = 220 V , Connected in Star . A)   Calculate the voltage in the line ( V line ) ?

11. EXAMPLE ( 2 ) Q2 An electric motor has Current phase = 70 A , Connected in Delta . A)   Calculate the current in the line ( I line ) ?

12. Thank you for you Directed By : Mansour Ali AbuTalib Under Supervision Of The Teacher : Mohammed elmaghawri