From Example 4.4, the pickup setting of Rb is 10.0 A, and the time dial setting is 1
2 . Theoretically,
to ensure that Rab backs up Rb it should be set for the same pickup current, i.e. it sees the same faults,
In a network, the coordination of time-delay overcurrent relays is complicated by the problem
of infeed and outfeed. Although this condition is most frequently associated with distance relays,