RELAYS 101

Enter Line Impedance Secondary Ohms and Distance Values to Compute Relay Test Set Values

Enter 100% Line Z R1 component: Enter 100% Line Z X1 component:

Enter 100% Line Z R0 component: Enter 100% Line Z X0 component:

Enter Fault Resistance RF component: (Used internally for Ground Fault Calculation Only)

Enter Source Impedance (PU of Line): (Higher number represents weaker source. 0 = Infinite Source)

Enter Distance Bus to Fault (PU of Line): (1.0 = 100% of protected line)

Choose Fault Type A-G Fault B-C Fault

VA Magnitude: VA Angle:

VB Magnitude: VB Angle:

VC Magnitude: VC Angle:

IA Magnitude: IA Angle:

IB Magnitude: IB Angle:

IC Magnitude: IC Angle: