Eaton ETR-4000-2A1BA0 Transformer Relay - Modbus RTU RS485

The eight digital inputs and nine digital outputs enable extensive remote signaling and status reporting, allowing you to automate protection actions and improve fault visibility with minimal wiring. This feature translates to lower MTTR and higher plant availability in substations and OEM equipment, while supporting transformer protection applications with clear, auditable digitial I/O. The two current sensing inputs provide differential and metering capabilities that enhance protection selectivity and energy accounting, which helps reduce nuisance tripping and supports compliance with metering accuracy requirements in industrial facilities. With Modbus RTU or DNP3 RTU over RS485, integration with SCADA systems becomes straightforward, enabling centralized monitoring, alarm management, and asset optimization across distributed transformers. The broad power supply range (19-300 Vdc and 40-250 Vac) and 50/60 Hz operation ensure seamless compatibility with diverse plant power architectures, minimizing installation time and eliminating the need for extra power conditioning equipment. I/O options such as Sensitive Ground Input, IRIG-B Trip Coil Monitor, and URTD Interface, alongside removable terminals and semi-flush mounting, simplify installation, retrofit, and field upgrades in harsh industrial environments. Zone selective interlocking with 2 channels enhances protection coordination, reducing the risk of cascading trips and improving system reliability in complex substations.