Eaton ETR-4000-2A0CB0 Transformer Relay - Modbus TCP
Part Number: ETR-4000-2A0CB0
Quick Summary
Eaton transformer relay is a protective device that monitors transformer health and trips when anomalies are detected, making it ideal for substations and large industrial power systems. The challenge for engineers is integrating robust protection with modern communications while preserving uptime and visibility across controls. This model supports common industry practices and can adapt to CE or SIL-oriented environments as defined by the manufacturer, with Compliances checked via Eaton documentation. Built-in Modbus TCP or DNP3 TCP/UDP over Ethernet RJ45 and optional Trip Coil monitoring help future-proof protection schemes, while flexible I/O supports OEM and retrofit projects. In short, it translates protection theory into practical, measurable improvements for reliability, diagnostics, and operational efficiency.
Product Information
Extended Description
ETR-4000-2A0CB0 Eaton: Eaton, transformer relay, ETR-4000, Transformer protection relay,5A, 1A, 40-250 Vac, 19-300 Vdc, 8, 9, Removable, Transformer, , over Ethernet RJ-45,19-300Vdc, 40-250Vac, 50/60 Hz Trip Coil Monitor,
Product Name
Eaton transformer relay
Catalog Number
ETR-4000-2A0CB0
UPC
786679154694
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
Conformal Coated Circuit Boards
Communication
Modbus TCP or DNP3 TCP/UDP over Ethernet RJ45
Current sensing inputs
2
Digital inputs
8
Digital outputs
9
I/O options
IRIG-B Trip Coil Monitor URTD Interface
Modbus / DNP3 RTU
over Ethernet RJ-45
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
Power metering, monitoring and diagnostics products for OEMs
Power metering, monitoring and diagnostics products for OEMs
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Programming an Eaton E-Series Relay, Step 2: Getting Started with PowerPort-E
Eaton Specification Sheet - ETR-4000-2A0CB0
Feature → Business Impact → Application: 8 digital inputs and 9 digital outputs provide expansive control and signaling capabilities, enabling precise protection coordination and streamlined interlocking in transformer circuits. This translates to faster fault isolation, reduced outage duration, and lower maintenance costs in substations and plant assets. Application: transformer protection and monitoring in OEM equipment and retrofit projects. Feature → Business Impact → Application: 2 current sensing inputs allow accurate current-based protection and metering, supporting differential protection logic and energy accounting. This improves accuracy of fault detection and enables better surge and fault management in high-energy environments. Application: plant feeders and transformer banks with mixed loading. Feature → Business Impact → Application: Modbus TCP or DNP3 TCP/UDP over Ethernet RJ-45 provides flexible, standards-based communication for remote monitoring, data logging, and integration with SCADA/EMS. Application: centralized protection management and asset diagnostics. Feature → Business Impact → Application: Removable terminals simplify field wiring and maintenance, reducing commissioning time and downtime during upgrades. Application: retrofit and service-friendly installations. Feature → Business Impact → Application: Conformal coated circuit boards offer resilience in humid or dusty environments, extending mean time between failures and protecting sensitive electronics. Application: harsh industrial settings. Feature → Business Impact → Application: IRIG-B Trip Coil Monitor and I/O options expand protection versatility, enabling precise trip timing and auxiliary signaling in mission-critical applications. Application: power plants, data centers, and reliable industrial operations.
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FAQs
The device uses removable terminals and supports semi-flush mounting, which simplifies wiring and retrofit installs. Plan IO wiring around the 8 digital inputs, 9 outputs, and 2 current sensing inputs, then route Modbus TCP or DNP3 traffic to the system controller. Ensure the supply is within 19-300 VDC or 40-250 VAC and verify grounding practices per Eaton installation guidelines.
Key specs include the 50/60 Hz frequency rating, the dual power supply range (19-300 VDC, 40-250 VAC), 8 inputs and 9 outputs, and 2 current sensing inputs. Use these to configure protection logic for transformer fault detection, and align settings with your system’s CTs, VT/PT ratios, and coordination with upstream relays. Consult the Eaton datasheet for detailed configuration ranges.
Yes. The unit is designed as a transformer protection relay with Modbus TCP or DNP3 over Ethernet, removable terminals, and optional IRIG-B Trip Coil monitoring, making it applicable for substations, OEM power solutions, and retrofit projects. Verify field conditions and interface compatibility with your SCADA or EMS environment using the datasheet guidance.
Compliances are to be confirmed with the manufacturer. Eaton provides data sheets and installation manuals that indicate intended regulatory alignment; consult Eaton’s documentation for the ETR-4000-2A0CB0 to confirm CE, SIL, IP, or other certifications relevant to your project requirements.
The relay supports Modbus TCP or DNP3 TCP/UDP over Ethernet RJ-45 for integration with SCADA or EMS. It also offers I/O options such as IRIG-B Trip Coil Monitor, and standard digital I/O to support robust protection schemes in industrial environments.