REF611 Product Guide - Motor protection - Transformer protection - 2 winding - Feeder protection - Busbar protection (voltage and frequency) - Grid automation - Busbar differential protection (high impedance) - Generator protection - Back-up protection - Product Guide - 611 series Relion Protection and Control - REF611 Feeder Protection and Control - 2.0 - IEC - ANSI
REF611_pg_757468_ENf.pdf