Three phase fault analysis study trainer 3 phase power supply, simulating the 3 phase generation.To Simulate 3 phase Balanced system Fault and unsymmetrical faults.Fault study with single line and double line in 3 phase system.FAULTS:L-G – FaultL-L – FaultL-L-G – FaultSingle Conductor open faultDouble conductor open faultFault through impedanceTheoretical calculations an verification with practical results.The transmission lines are simulated by high frequency Inductance & resistance for short medium at long line.