✅ ABB ELR72 – Residual Current Relay 230V (Part No.: 2CSG252120R1202) The ABB ELR72 is a versatile residual current relay operating at 230V AC. It supports both instantaneous and time-delayed tripping with selectable leakage thresholds, ideal for transformer or generator protection. Technical Specifications: Part Number: 2CSG252120R1202 Model: ELR72 Supply Voltage: 230V AC Trip Delay: Adjustable Sensitivity Range: 30mA to 30A Applications: Switchgear, transformers, control panels Mounting: DIN rail