Q. 53 The over current relays for the line protection and loads connected at the buses
are shown in the figure.
The relays are IDMT in nature having the characteristic
The maximum and minimum fault currents at bus B are 2000 A and 500 A
respectively. Assuming the time multiplier setting and plug setting for relay 
to be 0.1 and 5 A respectively, the operating time of RB (in seconds) is_____.
Answer:(0.226)
Explanation:
