Eaton Transformer Relay ETR-5000-2A3IB1 - 50/60 Hz

Eight digital inputs and nine digital outputs provide integrated protection logic in a single device. This reduces panel wiring, minimizes misconnection risk, and lowers installation cost by removing the need for separate I/O modules and fault relays. In transformer feeder applications, the compact package delivers direct visibility of status and faults, enabling faster fault isolation and more reliable protection coordination with zone selective interlocking. Dual power supply ranges of 19-300 Vdc and 40-250 Vac, with 50/60 Hz operation, enable a single unit to operate across regional grids without adapters. This broad compatibility lowers spare-part stocks and simplifies procurement for multi-site rollouts. Communications support includes Modbus over RS-485 and TCP/IP Ethernet, allowing straightforward integration with existing SCADA systems and remote diagnostics, while IRIG-B adds precise time synchronization for protective relays. I/O options such as URTD interface, Sensitive Ground Input, Trip Coil Monitor, and URTD support expand protection coverage and enable advanced signaling strategies. The conformal coating on circuit boards is designed for harsh environments, improving reliability in damp, dusty, or outdoor installations. The design uses removable terminals and projection mounting to simplify field wiring and retrofit, reducing commissioning time and error potential. Zone selective interlocking supports coordinated tripping across transformer banks, reducing outage scope and improving safety margins. With 8 inputs and 9 outputs still available in a compact form factor, this transformer relay scales from simple to complex protection schemes as system requirements evolve. Comprehensive Eaton documentation, including the ETR-5000 datasheet, helps engineers validate configurations during design review.