Eaton ETR-4000-2A0EB0 Transformer Relay - Profibus/RS-485

Robust protection logic reduces fault propagation and short-circuit risk, translating to lower downtime and safer operation. The ETR-4000-2A0EB0 implements differential protection and current-sensing inputs to detect anomalies quickly, enabling proactive trips and selective coordination across feeders. This is ideal for OEM equipment and plant-wide transformer protection where reliability and rapid fault isolation are critical. Flexible I/O and communications provide eight digital inputs, nine outputs, and two current-sensing inputs, enabling ample control, metering, and signaling points for complex protection schemes. Coupled with Profibus-DP over D-Sub/RS-485, it integrates cleanly with existing PLCs and SCADA systems, reducing wiring and engineering time while improving data visibility. Wide power supply range of 19-300 Vdc or 40-250 Vac and a 50/60 Hz rating support global deployments, minimizing external conditioning and simplifying installation. Removable terminals and semi-flush mounting speed retrofit and service in the field, while conformal-coated boards protect against humidity and contaminants in harsh environments. Trip Coil Monitor and Zone Selective Interlocking (2) provide enhanced protection logic and selective tripping; built-in diagnostics support predictive maintenance and faster issue resolution. The Eaton warranty and support ecosystem offer assurance for long-term ROI, even as transformer protection requirements evolve with industry standards.