Eaton transformer relay ETR-4000-2A3GA0 - Modbus RTU/DNP3 RTU over RS-485

Communication versatility enables seamless SCADA integration with Modbus RTU and DNP3 RTU over RS-485, supporting easy integration with diverse control systems and facilitating rapid fault signaling in critical installations. This directly translates to shorter mean time to repair and improved plant reliability in transformer protection applications. The 8 digital inputs and 9 digital outputs provide flexible interlocking and signaling without secondary hardware, helping to reduce wiring complexity and inventory costs while enabling scalable protection schemes for expanding facilities. A wide power-supply range (19–300 Vdc or 40–250 Vac) and 50/60 Hz operation simplify installation across multiple sites, lowering commissioning time and minimizing the risk of power-supply incompatibilities during retrofits. Removable terminals and semi-flush mounting improve field serviceability, speeding maintenance and mitigating downtime during inspections. Differential protection, current protection, and metering capabilities deliver precise protection and energy insight, supporting compliance and accurate billing and reporting. Zone selective interlocking with two zones enhances fault isolation in transformer banks, enabling faster restoration and improved system availability. Additional I/O options such as Trip Coil Monitor URTD, Sensitive Ground Input, and IRIG-B time synchronization provide advanced control, synchronization, and enhanced reliability in mission-critical environments.