Eaton ETR-4000-2A3CA1 Transformer Relay - 50/60 Hz

The ETR-4000-2A3CA1 provides eight digital inputs and nine digital outputs, enabling sophisticated protection schemes and reliable signaling between relays and PLCs. This directly reduces miscoordination risk and enables precise fault isolation, limiting collateral damage during faults. Power supply flexibility is a key feature, with a 19-300 Vdc or 40-250 Vac range that eliminates the need for multiple rails and simplifies site wiring, stocking, and commissioning. Communication options include Modbus TCP or DNP3 over Ethernet RJ45, delivering real-time data, remote diagnostics, and seamless SCADA integration for plant-wide visibility and faster decision-making. The I/O options—Trip Coil Monitor, IRIG-B, Sensitive Ground Input, URTD Interface—enhance protection accuracy, timing, and synchronization in critical environments. Relationship to zone-selective interlocking (two channels) and 2 current sensing inputs enables scalable protection architectures for transformers in substations and OEM installations. Finally, removable terminals and projection mounting streamline installation and maintenance, reducing downtime during upgrades and service windows. The unit’s phase current specification (5A/1A) and differential protection capabilities align with industry standards, supporting robust fault detection without compromising system uptime. In practice, engineers report fewer false trips and faster fault clearance when combining these features with modern PLCs and SCADA dashboards, translating directly to lower operating costs and improved asset availability across production lines and distribution networks.