An SEL321 relay is connected to a 3-phase power system through a CT with a ratio of 42 . The relay settings are as follows:

Phase time overcurrent pickup =4.5, Curve U1, Time dial =5
Neutral time overcurrent pickup =0.8, Curve U2, Time dial =4
Negative sequence time overcurrent pickup =0.5, Curve U3, Time dial =1 Currents flowing in the primary of the CT are: IA=973∠47∘,IB=590∠−120∘,IC=759∠154∘.

Calculate the relay trip time and enter your answer to 3 decimal places.