Eaton Transformer Relay ETR-4000-2A0FB0 - 50/60 Hz

The ETR-4000-2A0FB0 is built for flexible deployment with a wide power-supply range of 19-300 Vdc and 40-250 Vac, plus eight digital inputs and nine digital outputs, two current sensing inputs, and removable terminals that speed field installation and future upgrades. This combination translates to faster commissioning, simplified spare-part planning, and reduced wiring mistakes during maintenance. In terms of communications, Modbus RTU and DNP3 RTU over fiber optic ST enable secure, long-distance data transfer to SCADA systems, minimizing latency and maximizing outage awareness in substations or OEM equipment. Conformal coating on the circuit boards boosts reliability in humid, dusty, or chemically challenging environments, extending service life and lowering life-cycle costs. The I/O options include Trip Coil Monitor, URTD Interface, and IRIG-B, supporting advanced protection features like zonal selective interlocking for selectivity and reduced risk of unnecessary trips. With 8 DI and 9 DO, operators gain precise control and metering capabilities, improving energy management and fault analysis. The device’s 8 inputs and 9 outputs align with common transformer protection schemes, enabling easy retrofit or expansion in existing installations. The transformer protection relay is designed for semi-flush mounting and removable terminals, facilitating quick swaps and routine diagnostics. Weight and dimensions, roughly 9.3 lb and about 8.06 in length by 8.7 in height by 9.72 in width, support straightforward rack and enclosure integration, while the option for conformal coating supports continued operation in challenging environments. Overall, the ETR-4000-2A0FB0 combines protection, communication, and monitoring in a single, scalable solution for transformer protection in industrial plants and utilities.