REX640 Hardware Modification Instructions - Arc protection - Auto synchronization - Back-up protection - Bay control and measurement - Busbar differential protection (high impedance) - Busbar protection (voltage and frequency) - Capacitor bank protection - Feeder protection - Generator protection - Grid automation - Interconnection protection - Merging unit - Motor protection - Petersen Coil control - Power management/Load shedding - Transformer protection - 2 winding - Transformer protection - 3 winding - Voltage regulation - Hardware Modification Instructions - REX640 Protection and control - PCL4 - ANSI