GE Multilin L90 Line Current Differential System 9-179 THEORY OF OPERATION 9.2 OPERATING CONDITION CHARACTERISTICS9Figure 9–7: RESTRAINT CHARACTERISTICS831726A1.CDR(Angle between loc and rem isideally 0 for internal fault)I Io1 - For rem =1.5 pu and angle 0-360 with respect to locI Io2 - For rem =3 pu and angle 0-360 with respect to locI IoOPERATEIloc Irem-3I Iloc - rem180150120906030-30-60-90-120-150-1801 2 3 40IIlocremRESTRAINTRESTRAINT12Boundary point (angle between loc and rem about 130 )I I oTrip point (angle betweenloc and rem 0 )I I oBoundary point (angle between loc and rem about 140 )I I oOPERATE12IIlocremImaginary-2231 2 3 4IIlocremReal-1-2Restraint point (angle betweenloc and rem 180 )I I o-3-41-1RESTRAINT0
