REF620 Application Manual - Arc protection - Bay control and measurement - Merging unit - Feeder protection - Busbar protection (voltage and frequency) - Capacitor bank protection - Interconnection protection - Busbar differential protection (high impedance) - Power management/Load shedding - Back-up protection - Application Manual - Application Manual - 620 series Relion Protection and Control - REF620 Feeder Protection and Control - Relion 620 series - 2.0 FP1 IEC - IEC - 01.06.2023