REX640 IEC 61850 Protocol Implementation eXtra Information for Testing (PIXIT) - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - IEC 61850 Conformance Documents - REX640 Protection and control - PCL4 - IEC