Fault

location

Transition resistance Ω

Fault initial angle

Fault distance

fault type

Decision result

Line, L1, L2, L3, L4

100

5

45

90

100

Distance from bus M 80 km

Phase B short circuit to ground

External

External

External

External

Busbar M

300

5

45

90

100

Phase B short circuit to ground

Internal

Internal

Internal

Internal