620 series Technical Manual - Arc protection - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Interconnection protection - Power management/Load shedding - Technical Manual - 620 series Relion Protection and Control - Relion Protection and Control - 2.0 FP1 IEC - IEC