Eaton ETR-4000-2A3BA0 Transformer Relay - RS485 Modbus

Part Number: ETR-4000-2A3BA0
ETR-4000-2A3BA0
Manufacturer
Eaton
Part number
ETR-4000-2A3BA0
Category

Quick Summary

Eaton transformer relay ETR-4000-2A3BA0 protects transformer assets by delivering advanced protection and monitoring in electrical transmission and distribution. Engineers often struggle with integrating reliable protection logic across RS-485 networks and ensuring accurate trip coordination. Where compliance matters, certifications such as CE, SIL readiness, and regional approvals are typically required; confirm with the manufacturer. This solution also supports Modbus RTU or DNP3 RTU over RS-485, enabling seamless integration with SCADA and protection schemes, delivering business value for OEMs and utilities alike.

Product Information

Extended Description

ETR-4000-2A3BA0 Eaton: Eaton, transformer relay, ETR-4000, Transformer protection relay, Modbus RTU or DNP3 RTU over RS485, 5A, 1A, 40-250 Vac, 19-300 Vdc, 8, 9,Transformer, over RS-485, 19-300Vdc, 40-250Vac, 50/60 Hz , Trip Coil Monitor
Product Name
Eaton transformer relay
Catalog Number
ETR-4000-2A3BA0
UPC
786679154359
Product Length/Depth
8.06 in
Product Height
8.7 in
Product Width
9.72 in
Product Weight
9.3 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Compliances
Contact Manufacturer
Application
Transformer
Type
Transformer relay
Product Category
Transformer protection relay
Analog inputs
0
Analog outputs
0
Base relay
ETR-4000
Conformal coating
None
Communication
Modbus RTU or DNP3 RTU over RS485
Current sensing inputs
2
Digital inputs
8
Digital outputs
9
I/O options
URTD Interface Trip Coil Monitor IRIG-B Sensitive Ground Input
Modbus / DNP3 RTU
over RS-485
Phase current
5A, 1A
Sensing inputs
Current Protection and Metering Differential Protection
Zone selective interlocking
2
Number of inputs
8
Number of outputs
9
Power supply range
19-300Vdc, 40-250Vac
Frequency rating
50/60 Hz
Power consumption
40-250 Vac, 19-300 Vdc
Number of inputs
8
Number of outputs
9
Power supply range
19-300Vdc, 40-250Vac
Power consumption
40-250 Vac, 19-300 Vdc
Frequency rating
50/60 Hz
Terminals
Removable
Mounting method
Semi-flush
Voltage sensing inputs
0
Terminals
Removable
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Feature → Business Impact → Application: 8 digital inputs and 9 digital outputs provide flexible I/O for complex protection schemes, enabling precise control and status signaling in transformer protection relays used in substations. This reduces wiring complexity and accelerates commissioning, improving reliability in medium-sized power installations. Feature → Business Impact → Application: Modbus RTU or DNP3 RTU over RS-485 enables easy integration with SCADA and protection schemes, cutting integration time by aligning with common industrial protocols and standards. Feature → Business Impact → Application: Dual power supply ranges (19-300 VDC and 40-250 VAC) and a 50/60 Hz frequency rating support diverse plant environments, delivering consistent performance across global sites and simplifying spare-part strategy. Feature → Business Impact → Application: 2 current sensing inputs, 8 digital inputs and 9 digital outputs, plus URTD interface and Trip Coil Monitor, enable fast fault isolation, enhanced diagnostics, and tighter coordination with zone selective interlocking for improved system stability. Feature → Business Impact → Application: Removable terminals and semi-flush mounting simplify installation and maintenance, reducing downtime and enabling retrofits in existing switchgear configurations. The device also supports transformer protection with differential and current protection metering capabilities, aligning with industry best practices while offering scalable monitoring. With a one-year warranty (or 18 months from shipment), it provides predictable lifecycle costs and reduced total cost of ownership, making it suitable for utility feeders and OEM transformer protection stacks.

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FAQs

Begin by locating the device near the transformer control cabinet with removable terminals for straightforward wiring. Connect 8 digital inputs and 9 outputs to the protection logic and ensure the RS-485 port is cabled to the Modbus RTU or DNP3 RTU network. Verify the 19-300VDC or 40-250VAC power supply range and set the protection parameters according to the transformer’s rating and coordination study. The URTD interface and Trip Coil Monitor options can be enabled for enhanced safety and quick fault isolation.
Key specs include 8 digital inputs, 9 digital outputs, 2 current-sensing inputs, power supply range of 19-300 VDC or 40-250 VAC, and a 50/60 Hz frequency rating. Communication options are Modbus RTU or DNP3 RTU over RS485. The device supports transformer protection with 5A and 1A current sensing, and includes Zone Selective Interlocking capability to improve selective trip performance.
Yes. The relay is designed for transformer protection applications, supporting differential and current protection concepts, RS485 communication for SCADA integration, and zone selective interlocking. It is well-suited for substations and OEM equipment where reliable protection coordination and remote monitoring are required, provided regional certification and installation practices align with Eaton specifications.
Compliance details are provided by the manufacturer and can vary by region and installation. Typical considerations include CE marking, SIL readiness assessments, and enclosure/IP ratings depending on site requirements. Always confirm applicable certifications with Eaton for your specific region and installation and review the warranty terms (one year from installation or eighteen months from shipment).
The ETR-4000-2A3BA0 reduces commissioning time with removable terminals and a compact semi-flush mounting footprint, simplifying retrofit projects. Its monitoring capabilities (current sensing, TRIP coil monitoring, and diagnostic data via RS485) support proactive maintenance, faster fault resolution, and lower unplanned downtime, contributing to lower total cost of ownership and improved system availability.