Calculate pickup values, timing curves, coordination time intervals (CTI), and test injection currents for overcurrent (50/51), differential (87), distance (21), and directional (67) protective relays. Essential tool for relay technicians, protection engineers . As of this update, Service Disconnect Switches, Surge Protective Devices, Switchboards, Switchgear, and Panelboards, Industrial Control Panels, Motor Controllers, Elevators, Industrial Machinery, and Transfer Equipment are all required to have short-circuit current ratings. Most power components. Short-circuit calculations are a daily requirement for electrical engineers who design, operate, or protect power systems. The IEC 60909 standard. IEEE/IAS/I&CPSD Protection & Coordination WG Chair Jacobs Canada, Calgary, AB rasheek. Long term cost reduction (TCO) for trainings and maintenance by reduce variety of relays A fast and selective arc fault mitigation for air-insulated LV & MV switchgear and Relion protection and control relays and sensor technology protect staff and plant facilities for many years. This module performs single-, two- (with and without earth connection) and three-phase faults on symmetrical as well as unsymmetrical AC and DC.