QUESTION 5 [14] 5.1 Calculate the plug setting and time multiplier setting (earth fault settings) for relay B (electromechanical). Relay B is required to trip in 0.4s for an earth fault at busbar C. (8) 400/1 Relay A B -1200A Load=300A Figure 5.1 300/1 Relay B c) 41-600A Load=180A 5.2 What will be the trip time for Relay B for a close up single phase fault (immediate remote side) at busbar B. 156 (6) TOTAL = 100 17