Eaton ETR-4000 Transformer Relay - Profibus-DP

The ETR-4000 offers eight digital inputs and nine outputs, enabling expanded monitoring and control for transformer protection. Business impact: greater visibility, easier coordination with PLCs, and reduced risk of misoperation in protection schemes. Application: transformer protection in medium- and low-voltage feeders, where reliable I/O is critical. The device includes two current sensing inputs, supporting differential protection and metering to enhance protection accuracy and fault discrimination, which translates to faster fault isolation and lower outage costs. Communication via Profibus-DP over D-Sub/RS485 provides straightforward integration into existing fieldbus networks, improving data accessibility for centralized protection logic and asset management. This, combined with 50/60 Hz operation and a wide power supply range (19–300 Vdc, 40–250 Vac), simplifies installation across varied plant environments and reduces wiring complexity. Zone selective interlocking (2) and I/O options such as Trip Coil Monitor URTD Interface IRIG-B and Sensitive Ground Input enable tailored protection schemes for complex transformer assemblies, while removable terminals and projection mounting streamline field installation and maintenance. The overall design supports scalable protection architectures, helping engineers achieve consistent protection across multiple transformers and minimizing total cost of ownership.