Eaton ETR-4000-2A0IB0 Transformer Relay - 50/60 Hz

Flexible power and I/O architecture enables operation from 19–300 Vdc or 40–250 Vac, while eight digital inputs and nine outputs simplify wiring. This reduces panel clutter and minimizes the need for external I/O modules, cutting installation time and total cost of ownership. Use this in transformer protection schemes within substations and plant transformers to streamline commissioning and improve reliability. Communication and interoperability ensure seamless SCADA integration via RS-485 Modbus/DNP3 RTU and Ethernet TCP. The device supports remote monitoring, event logging, and coordinated protection actions across multiple feeders, reducing mean time to repair and enabling faster fault isolation. Protection features include current sensing with 5A/1A coils, differential protection, and Trip Coil Monitor with URTD Interface. This delivers selective tripping, precise fault localization, and enhanced fault recording with minimal nuisance trips. Installation benefits come from removable terminals and semi-flush mounting, plus conformal coated circuit boards that resist harsh environments. These touches simplify field service, extend life in dusty or humid spaces, and support quick upgrades without rewiring. Diagnostics and coordination options such as Zone Selective Interlocking (2) and IRIG-B timing provide robust protection in multi‑unit installations, improving system reliability and reducing coordination errors across transformer fleets.