Eaton ETR-4000-2A2FA0 Transformer Relay - Modbus RTU over ST

Part Number: ETR-4000-2A2FA0
ETR-4000-2A2FA0
Manufacturer
Eaton
Part number
ETR-4000-2A2FA0
Category

Quick Summary

The Eaton transformer relay ETR-4000-2A2FA0 provides transformer protection for industrial power systems. Engineers often struggle to reliably protect transformers while integrating protection data into Modbus RTU or DNP3 RTU networks for centralized monitoring. Compliances are determined by the manufacturer; contact Eaton to confirm CE, IP, or SIL approvals for your region and application. This model supports 8 digital inputs, 9 outputs, and current sensing options of 5A and 1A, along with a 19–300 Vdc / 40–250 Vac power range and 50/60 Hz compatibility, plus fiber optic Modbus or DNP3 communication. The combination of flexible I/O, robust protection features, and secure remote communications translates into improved uptime, easier regulatory reporting, and reduced maintenance costs for transformer protection projects.

Product Information

Extended Description

ETR-4000-2A2FA0 Eaton: Eaton, transformer relay, ETR-4000, Transformer protection relay, Modbus RTU or DNP3 RTU , 5A, 1A, 40-250 Vac, 19-300 Vdc, 8, 9, Transformer, 19-300Vdc, 40-250Vac, 50/60 Hz , Sensitive Ground InputTrip Coil Monitor
Product Name
Eaton transformer relay
Catalog Number
ETR-4000-2A2FA0
UPC
786679153918
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 Fiber Optic ST
Current sensing inputs
2
Digital inputs
8
Digital outputs
9
I/O options
Sensitive Ground Input IRIG-B URTD Interface Trip Coil Monitor
Modbus / DNP3 RTU
over fiber optic ST
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
E-series protective relays E-series protective relays Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Introduction to Eaton's E-Series Relay, Step 1: Physical Connections Eaton Specification Sheet - ETR-4000-2A2FA0
I/O flexibility and protection logic enable complex, customized protection schemes that directly reduce outage durations; with 8 digital inputs, 9 outputs, and 2 current sensing inputs, you can tailor protection sequences to specific transformer configurations. The business impact is clear: faster fault isolation and clearer diagnostics translate to lower maintenance costs and higher equipment availability in substations and industrial plants. This capability is particularly valuable in facilities with tight control rooms or limited space, where semi-flush mounting and removable terminals speed up commissioning and future wiring changes. The application spans plant-wide transformer protection, metering, and interlocking, supporting accurate fault data to feed SCADA systems and improve asset management. Long-term ROI comes from reduced downtime and proactive maintenance driven by precise event reporting.

Get a Quick Quote for a Eaton ETR-4000-2A2FA0

Chat with us on WhatsApp - fast responses guaranteed

Need to speak with someone? We'll call you back within 2 hours during business hours

Interested in Eaton ETR-4000-2A2FA0? Enquire Now

FAQs

The ETR-4000-2A2FA0 uses a semi-flush mounting method with removable terminals, designed to speed up installation and wiring changes. It supports eight digital inputs and nine outputs, providing flexible wiring for transformer protection schemes. This layout helps technicians reduce commissioning time and simplifies future reconfiguration when protection logic needs updating.
This relay offers Modbus RTU or DNP3 RTU communication over fiber optic ST, enabling secure, interference-free data exchange between the relay and SCADA or monitoring systems. The fiber interface supports long-distance links common in substations, improving reliability of status reports, alarms, and remote diagnostics.
The unit functions as a transformer protection relay with current protection and metering, differential protection, and a Trip Coil Monitor. It also supports Zone Selective Interlocking and a Sensitive Ground Input option, enabling fast, selective tripping and robust fault isolation while maintaining system reliability in distributed power networks.
The relay accepts a wide power supply range of 19–300 VDC and 40–250 VAC, with a frequency rating of 50/60 Hz. This flexibility supports integration across varied plant voltages and retrofits where existing infrastructure uses different supply standards, reducing the need for additional power conversion hardware.
Official documentation is available in Eaton’s downloads section. Look for the Eaton Specification Sheet – ETR-4000-2A2FA0, which provides detailed wiring, protection features, communication options, and installation guidelines to support compliant implementation and maintenance planning.