Eaton ETR-4000-2A0GB1 Transformer Relay - RS-485 Modbus

Feature: Eight digital inputs, nine outputs, and two current sensing inputs. Business Impact: Enables complex protection schemes with clear visibility of protective signals and fast, coordinated trips, reducing fault dwell time and improving system availability. Application: Suitable for transformer protection in substations and industrial plants, with scalable I/O for future expansions. Feature: Modbus RTU or DNP3 RTU over RS-485 via D-Sub connectors. Business Impact: Streamlines data exchange with SCADA and energy meters, lowering wiring costs and integration time. Application: Ideal for retrofit projects and OEM deployments where remote monitoring is essential. Feature: Differential protection, current protection, and metering with zone selective interlocking (2 zones). Business Impact: Improves selectivity and fault localization, minimizing unnecessary outages and optimizing maintenance windows. Application: Critical for high-availability transformer banks and industrial feeders. Feature: Conformal coating, removable terminals, and projection mounting. Business Impact: Enhances reliability in harsh environments and simplifies field replacement or upgrades, lowering maintenance downtime. Application: Marine, outdoor, or rugged plant installations where exposure and serviceability matter. Feature: I/O options including URTD Interface, IRIG-B, and Trip Coil Monitor. Business Impact: Time synchronization and trip verification strengthen protection coordination and event auditing. Application: Utilities and OEMs requiring precise timing and robust fault records. Insight: This device’s 8/9 I/O balance, communication flexibility, and modular protection philosophy align with modern plant digitization, enabling engineers to consolidate protection, monitoring, and control in a single relay.