Siemens Residual-current transformer, 80mm opening, 30mA, 40AProduct Overview Residual current transformer designed for comprehensive residual current monitoring in machines and electrical systems. This SIRIUS 3UL23 series transformer features an 80mm bushing opening and monitors residual currents from 30 mA to 40 A. The device is engineered for integration with SIRIUS monitoring relays and SIMOCODE motor management systems, providing reliable detection of fault currents to protect equipment and personnel from