One device combining numerous location processes

It is freely programmable, and so it offers flexibility

The ideal control technology protocol for every application

Can be used as a digitising unit in the digital secondary substation

One device combining numerous location processes

It is freely programmable, and so it offers flexibility

The ideal control technology protocol for every application

Can be used as a digitising unit in the digital secondary substation

Fault Location in Analog as Well as in Digital Secondary Substations

EOR-3DS

The EOR-3DS combines short-circuit and earth fault indication in a single compact device. It can be used as a classic short-circuit and earth fault detection device, as well as digitisation unit for secondary substations. The device combines the advantages of various location processes. Through the prioritization and weighting of the location processes, they can be combined perfectly. This makes the EOR-3DS a superior aid when locating earth faults and short-circuits in analog as well as in digital secondary substations.

Further questions or want to start an enquiry? Please click “Product Enquiry”.

Applications

Downloads

Cross-Product Downloads

Special Publications

Applikationsbericht_EOR_KosteneffizientesManagementONS_DE.pdf

20240801

9.22 MB

Applikationsbericht_EOR_CostEfficientManagementDSS_EN.pdf

20240801

9.19 MB

SP_EORSys_2018_DE.pdf

20210401

8.1 MB

SP_EORSys_2014_EN.pdf

20210401

6 MB

Presentation Flyer: EOR-1DS

EOR-1DS_Handout_2025_DE.pdf

20250603

2.55 MB

EOR-1DS_Handout_2025_EN.pdf

2.55 MB

Quick Comparison: EOR-1DS vs. EOR-3DS

Schnell-Vergleich_EOR-1DS_vs._EOR-3DS_DE.pdf

20240816

1.97 MB

Quick-Comparison_EOR-1DS_vs._EOR-3DS_EN.pdf

20240816

1.98 MB

Product Overview A. Eberle

Produktuebersicht_Flyer_DE.pdf

20250214

2.3 MB

Product_Overview_Flyer_EN.pdf

20250214

2.32 MB

A. Eberle Seminars in Nuremberg

A._Eberle_Seminaruebersicht_DE.pdf

20250101

3.73 MB

EOR-3DS

Instruction Manual

Installation Manual

IM_EOR-3DS_DE_584.0891.00_20250109.pdf

20250109

1.8 MB

IM_EOR-3DS_EN_584.0891.01_20250109.pdf

20250109

1.79 MB

Technical Data Sheets

TD_EOR-3DS_B04_DE_20250110.pdf

20250110

2.39 MB

TD_EOR-3DS_B04_EN_20250110.pdf

20250110

2.37 MB

Firmware

Firmware – File

Firmware_EOR-3DS-V2.1.6.zip
SHA-256 Checksumme:
9b7674868b3438e1c71fb54cd174a24d145467164d9b1dde167397d45ba87091

20240508

124.12 MB

Firmware – Changelog

CL_EOR-3DS_V216_DE_20240506.pdf

20240501

0.39 MB

CL_EOR-3DS_V216_EN_20240506.pdf

20240501

0.39 MB

Data Point List

EOR-3DS_SCADA_Leittechnik_v2.1.6.zip
SHA-256 Checksumme:
dead0606325f9f9138ff7b2d70b8d6231aa273d3005dc61944ab909a0b27c6ea

v2.1.6

8.65 MB

Cumulocity IoT Certificate

CC_EOR-3DS_certificate_9902521.pdf

20240516

3.26 MB

Quick Comparison: EOR-1DS vs. EOR-3DS

Schnell-Vergleich_EOR-1DS_vs._EOR-3DS_DE.pdf

20240816

1.97 MB

Quick-Comparison_EOR-1DS_vs._EOR-3DS_EN.pdf

20240816

1.98 MB

AEToolbox

Instruction Manual

Software

SW_AEToolbox_VER0002.0002.0035.zip
SHA-256 Checksumme:
969aad172befc64d5f87b8b9a8258800dad6c9eca4320ef0172d3000992255e1

20231120

105.29 MB

Compatible with the following products: EOR-3D; REG-DP(A); REG-D(A) und PAN-D

Changelog

CL_AEToolbox_2.2.35_DE_20231201.pdf

20231201

0.56 MB

CL_AEToolbox_2.2.35_EN_20231201.pdf

20231201

0.59 MB

Digital and classic local network stations (MS/NS)

Transformer stations at grid nodes (MS)

Substations (HS/MS)

Transmission & distribution grids (HS/MS)

Industrial plants & production facilities

Ground-mounted photovoltaic systems

The Advantages of the EOR-3DS as Short-Circuit and Earth Fault Detection Device

Numerous Fault Location Processes

available in one single device

The earth fault detection device offers a wide range of location processes for both compensated and isolated networks; these can also be prioritised.

Compensated Networks:

Transient earth fault process through use of the qu2 and qui algorithms for one-time faults, intermittent faults (qui), faults in loops with large circulating currents (qu2) and erroneous resistances can be located in the kOhm range
Active power direction method or cos(φ): Evaluation of the active power direction, active residual current increase
Harmonics process with measurement of the associated power direction for a user-selected frequency
Pulse location
Directional or non-directional short-circuit indicator with configurable reset time

Isolated Networks:

Transient earth fault detection with the use of the qu2 and qui algorithms for one-time faults, restriking faults (qui) and faults in loops with large circulating currents (qu2)
Reactive power direction or sin(φ) method
Directional or non-directional short-circuit indicator with configurable reset time

High Flexibility

Through Free Programmability

Using the LUA programming language, customer-specific functions can be implemented in the earth fault detection device EOR-3DS. Information can also be exchanged directly between several EOR-3DS via Ethernet and functions can be realised based on this, e.g. monitoring functions for switching in compact switchgear.

Communications Protocols (SCADA)

For Every Application

The earth fault detection device EOR-3DS provides a wide range of protocols that can be used in parallel or one-by-one, including also IIot protocols via *MQTT.

Using the Modbus-Master Function, the EOR-3DS can also connect up to 6 devices (regardless of the manufacturer!) as Modbus slaves via Modbus RTU, translating the data into any other supported protocol.

This means that the EOR-3DS can also be used as a gateway or RTU.

The Following Protocols Are Available:

MQTT IIoT / Management & Operations (incl. encryption with customer-specific certificates)
IEC 60870-5-101 / 104
IEC 60870-5-103 including fault records

DNP 3.0
IEC 61850 GOOSE

Modbus RTU or TCP
Modbus Master for up to 6 devices

The Grid Status Always in View

Flexible in the Choice of Your Sensors

Do you see the risk of grid bottlenecks due to the strong expansion of decentralized generators or loads such as electromobility? Then monitor your medium-voltage level closely to keep an eye on trends.

Our EOR-3DS is optimized for the modern and highly accurate low power sensors of all major manufacturers on the market (Siemens, ABB, Zelisko, Greenwood Power and many more). Of course there is also the possibility of voltage measurement parallel to a capacitive voltage detection system (e.g. Capdis / WEGA). This provides the possibility to determine precise current, voltage and power measurement values even at the edge of the network.

Also at Home in the World of Classic Voltage Transducers

EOR-3DS can not only measure the voltage in parallel to a capacitive voltage detection system (e.g. Capdis or WEGA) or via low power sensors. The connection of a classic voltage transformer with 100V AC / 110V AC secondary voltage is also possible via the U10 adapter.

The same applies to current detection. Besides the possibilities of using low power inputs also classic current transformers with 1A / 5A secondary current can be connected to EOR-3DS when using the C21/C25 adapters.

Fit for the Future With the EOR-3DS

Through IT Security Incl. User Administration

The AEToolbox parameterisation software communicates with the EOR-3DS devices in encrypted form. In addition, a user/role concept allows the devices to be password-protected. Here, access via TCP (AEToolbox) and the front panel of the EOR-3DS can be configured separately. Furthermore, the EOR-3DS provides fully implemented certificate handling for encrypted communication with IIoT software (via MQTT).

*MQTT (originally MQ Telemetry Transport) is a network protocol for machine-to-machine communication (M2M) from the field of the “Internet of Things” (IoT), which enables the transmission of telemetry data in the form of messages between devices, in particular the connection of sensors and actuators in electrical engineering. Since 2013, MQTT has been standardised as an IoT protocol by the Organization for the Advancement of Structured Information Standards (OASIS).

The Advantages of the EOR-3DS as Digitisation Unit for Secondary Substations

The earth fault indicator EOR-3DS in the digital secondary substation combines classic earth fault and short-circuit location with the necessary digital interface functions. For the digital secondary substation, this turns a straightforward short-circuit and earth fault indicator into a completely new class of device:

Earth fault indicator EOR-3DS as digitisation unit for secondary substations

earth-fault-indicator-digitisation-secondary-substation — Schematic structure of the EOR-3DS as a digitisation unit in the intelligent secondary substation

The digital secondary substations is a key element for distribution system operators (DSO) in terms of automation, monitoring, and efficient operations of their grids. These digital secondary substations will be a vital element of the future actively operated smart grid and thus DSOs as well as manufacturers will have to face new challenges such as large-scale roll-outs of networked devices distributed over the whole power grid. The EOR-3DS in its function as a digitisation unit for secondary substations enables DSOs to operate a large number of digital secondary substations in a future-proof manner.

Implementing Future-Proof Digital Secondary Substations

The EOR-3DS in Its Function as Digitisation Unit

Management & Operations Functions (*MQTT-Protocol):
Reduces your operating costs by supporting mass parameterisation and remote firmware updates
- Bulk remote parameter setting, bulk over-the-air firmware update
- Saves time and money in maintenance
- Scalable to thousands of devices in rollout

SCADA & IIoT-Communication (*MQTT-Protocol):
Provides network transparency and flexibility in the grid through remote control and remote metering
- Record medium voltage readings via high accuracy low power sensors
- Distribute measured values via SCADA and IIoT communication (MQTT)
- Get real data for accurate condition estimation on all voltage levels

Remote reported & remote controlled:
Increases the level of grid automation
- Fault localisation and narrowing down of the fault location by remote signalling of all units
- Remote switching of all cable fields and detection of all switch positions and remote control switches
- Future-proof for higher autonomy functions (free programmability)

IT-Security:
Meets the highest standards through encrypted communication with certificate management
- Encrypted communication with the AEToolbox parameterisation software
- Encrypted communication of the MQTT protocols
- Certificate handling incl. signed manufacturer certificate and up to 5 additional operator certificates

Digital Local Substations in the Distribution Grid of the Future

EOR-3DS as a Digitization Unit at Netze BW

Quick Comparison: EOR-1DS vs. EOR-3DS

Find the Right Short-Circuit and Earth Fault Indicator for Your Application.

(Download quick comparison as PDF here)

erdschlussanzeiger-kurzschlussanzeiger-short-circuit-and-earth-fault-indicator

EOR-1DS
The economical indicator for
the secondary substation

EOR-3DS
The fault indicator for
the digital secondary substation

Available location methods

qu2 transient algorithm

Transient earth fault method

Directional short-circuit and earth fault detection

Pulse location

Wattmetric method cos(φ)

Reactive power direction sin(φ)

❌

Software

Simple operation and parameterisation without software

❌

Extensive cyber security features

Fault records and logbook

✔️

Flash memory up to 32 GB

Voltage measurement

Capacitive in parallel with VDS systems, low power sensors (two-wire technology) and classic transducers

Current measurement

Rogowski folding transducers, low power sensors (two-wire technology) and classic transducers

SCADA / Communication

Modbus RTU

❌

Applicable as a digitisation unit for digital secondary substations

❌

Available location methods

qu2 transient algorithm

Transient earth fault method

Directional short-circuit and earth fault detection

Pulse location

Wattmetric method cos(φ)

Reactive power direction sin(φ)

qui-Method

Restriking faults

Harmonics method

Software

Open setup as required with »AEToolbox« software

Certificate handling, user/role concept and encrypted connections

Extensive cyber security features

Fault records and logbook

✔️

Flash memory up to 32 GB

Voltage measurement

Capacitive in parallel with VDS systems, Low power sensors (two-wire technology or RJ45) and classic transducers

Current measurement

Low power sensors (two-wire technology or RJ45) and classic transducers

SCADA / Communication

Modbus RTU/TCP (Incl. “Modbus Master”)

IEC 60870-5-101 / 104, IEC 60870-5-103 Including Fault Records, IEC 61850 GOOSE, DNP 3.0

MQTT Management&Operations

MQTT IoT

Applicable as a digitisation unit for digital secondary substations

Patch- and Devicemanagement via MQTT

Mass remote parameterisation and firmware updates
via MQTT Management&Operations-function

FIND OUT MORE ABOUT »EOR-1DS«

FIND OUT MORE ABOUT »EOR-3DS«

You Have Any Questions About the EOR-3DS?

Our Specialists Will Be Happy to Help You!

Contact

Further Earth Fault and Short-Circuit Indicators

Discover Our Range of Products

EOR-1DS: The Economical Fault Indicator for Analog Secondary Substations

EOR-D: The earth fault location relay for several feeders (*discontinued, can only be ordered until 31.12.2026)

News From the Product Group

EORSys – News

Blogpost

Visit From the Rudolf Diesel Technical School at A. Eberle

15. July 2025

We were happy to welcome you, Rudolf-Diesel-Fachschule! Yesterday, we had the pleasure of welcoming two classes of future electrical engineering technicians from the Rudolf-Diesel-Fachschule Nürnberg[…]

Blogpost

TOP 100 Awards 2025: Innovation for the Energy Future

15. July 2025

💡 As part of the TOP 100 Awards 2025, we were honored to receive a special recognition last week in Mainz – personally presented by TV host and science journalist Ranga Yogeshwar.[…]

Blogpost

University Excursion: Pentecost Excursion of The Friedrich-Alexander-University Erlangen-Nuremberg (FAU)

14. July 2025

As a company dedicated to innovation, education, and the energy transition, we are pleased to have once again supported the Whitsun excursion of Friedrich-Alexander University Erlangen-Nuremberg (FAU)[…]

Blogpost

Further Growth at A. Eberle

14. July 2025

Welcome to the team! We welcome our new colleagues at A. Eberle.[…]

Product innovation

Product Discontinuation: Power Quality Interface (PQI-D) as of 31.12.2026

27. March 2025

The Power Quality Interface (PQI-D) product can only be ordered up to and including 31 December 2026.[…]

Product innovation

Product Discontinuation: Earth Fault Locating Relay (EOR-D) as of 31.12.2026

27. March 2025

The product earth fault locating relay for multiple outgoing circuits (EOR-D) can only be ordered up to and including December 31st, 2026.[…]

Blogpost

International Partner Week 2024 – a Look Back

29. August 2024

Our International Partner Week 2024 – many old friends and new faces were our guests, it was a pleasure.[…]

Product innovation

Product Discontinuation: Profibus-DP in the Types B01 & B02 as of 15.05.2024

3. June 2024

Profibus-DP in the types B01 & B02 is currently scheduled for product discontinuation.[…]

General Knowledge

The Future of the Distribution Grid: Focus on Digital Secondary Substations

13. May 2024

In this technical report, Gerald Jacob (Product Manager »EORSys«) uses a specific example to illustrate how distribution system operators can meet the challenges of energy transition in the medium and[…]

General Knowledge

Earth Fault Explained – Basics and Functions of an Electrical Phenomenon

6. March 2024

Everything you need to know about earth faults – from the basics, causes and examples to the consequences. Find out more in this article about earth fault clearing, compensation, location and the benefits[…]

General Knowledge

Ready for the Smart Grid of the Future?

6. March 2024

All information about smart grids/intelligent power grids, the technology behind them, advantages, disadvantages, challenges and current distribution.[…]

Special Publication

Cost Efficient Management of Digital Secondary Substations: Earth Fault Indicator EOR-3DS as Digitisation Unit for Secondary Substations

11. August 2023

Digital secondary substations are becoming a key element for distribution system operators in terms of automation, monitoring, and efficient operations of their networks. Read this technical report about[…]