✅ ABB RD2 – Digital Residual Current Monitoring Relay (Part No.: 16073162 / 2CSM142120R1201) The ABB RD2 is a compact digital residual current monitoring relay for detecting insulation faults and leakage current in grounded systems. Technical Specifications: Part Number: 16073162 (Module) / 2CSM142120R1201 (Code) Model: RD2 Type: Digital Residual Current Monitoring Relay Function: Monitors leakage current and insulation faults Applications: Industrial panels, preventive maintenance systems Mounting: DIN rail