GE D60 - Page 567

GE Multilin D60 Line Distance Protection System 8-17
8 THEORY OF OPERATION 8.3 GROUND DIRECTIONAL OVERCURRENT
8
I_op = |I_2| – |I_1| / 8 = 1.003 A > 0.25 A.
The overcurrent unit will pickup and the element will operate in the forward direction.