1. Chapter 1 :
Three Phase System

2. Single Phase System A VAa a
Alternating current system that has one source/supply A a
VAa
Teori penjanaan 3 fasa, kebaikan, aplikasi, jenis jujukan

3. Phasor Diagram VOLTAGE WAVEFORM AND PHASOR DIAGRAM
FOR SINGLE PHASE SYSTEM t
voltage V1
Phasor Diagram V1

4. THREE PHASE SYSTEM
If three single phase system combined, it will produce THREE PHASE SYSTEM.
Voltage in three phase system are equal in magnitude and frequency but out of phase with each other by 120º.
So, generated phase voltage had been produced by using three coils that must be rotate through the north and south pole, and these coils must be separated by 120º

5. Basic Three-Phase Circuit
Three-Phase Line
Three-Phase
Voltage
Source
Three-Phase
Load

6. 3 PHASE VOLTAGE SINUSOIDAL WAVEFORMVA VB VC t
120º
Voltan 3 fasa, magnitud dan sudut
240º

7. Normally, we take VA as a reference to VC and VB.
So, there are TWO relationship between voltage VA, VB and VC :
VB lagging VA by 120º and VC leading VA by 120º. This is known as Sequence ABC (positive)
VB leading VA by 120º dan VC lagging VA by 120º. This is known as Sequence ACB (negatif)

8. POSITIVE SEQUENCE, ABC
NEGATIVE SEQUENCE, ACB
Vm: Peak Voltage

9. POSITIVE SEQUENCE, ABC VC
120º
120º VA
120º
Voltan turutan abc VB

10. NEGATIVE SEQUENCE, ACB VB
120º
120º VA
120º
Turutan acb VC

11. THREE PHASE VOLTAGE SOURCE
Y-Connection

12. THREE PHASE VOLTAGE SOURCE
Δ-Connection

13. Δ-connection

14. Y-connection

15. Advantages of three-phase system compare to single-phase system
Three-phase transformer is much lighter, better efficiency and more economical compare to single-phase transformer that has same size.
Three-phase motor produce permanent torque while single-phase induction motor produce torque in pulse.
Three-phase motor have power factor and much better efficiency and small size for the same output compare to single-phase motor.
Three-phase motor is self-starter compared to single-phase motor that is not self-starter.

16. Application of Three Phase System
Transformer
Electric Motor
Three Phase Solid State Relay