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The ability to simulate relay response under steady-state and transient conditions during both fault and normal system operating conditions provides the necessary tools for protection engineers and technicians to confidently determine and evaluate the design and operation of protection system. Steady-state fault current provides only a snapshot operation of the relay based on sustained current. Transient fault simulation is necessary to determine the actual response time of the relay based on the distributed through fault containing AC and DC decay current.
The waveforms are generated from ETAP and are pragmatically played into the relay through ARTTS. This allows for verification of the relay operation under conditions matching actual system faults. By comparing these sets of curves, Star visually indicates the discrepancies and deviation between the actual (field setting) versus design (intended / ideal) device response characteristics. |