Fig. 5 shows the waveforms of the single line-to-ground fault
condition. Fig. 5a depicts the result of the conventional power
cable used with the real protective relay and the real parameters.
When a fault occurs, the utility current suddenly increases, the
protective relay detects the fault current, and consequently the circuit
breaker instantaneously operates at 0.49 s. In the case of
Fig. 5b represent the simulation results when the HTS power cable
is used instead of line 1. The operational characteristics of circuit
breaker are similar to the case of conventional power cable used