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 indicator, 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”.

The advantages of the EOR-3DS as short-circuit and earth fault indicator

Numerous fault location processes

available in one single device

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

earth-fault-indicator

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
earth-fault-indicator

High flexibility

through free programmability

Using the LUA programming language, customer-specific functions can be implemented in the earth fault indicator 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 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.

earth-fault-indicator-mqtt

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.

earth-fault-indicator

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

*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).

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-indicator

EOR-1DS
The fault indicator for
analog secondary substations

EOR-3DS
The fault indicator for
digital secondary substations

erdschlussanzeiger-kurzschlussanzeiger-short-circuit-indicator
Available location methods

qu2 transient algorithm

Transient earth fault method

Directional short-circuit and earth fault detection

Pulse location

In preparation for EOR-1DS

In preparation for EOR-1DS

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

MQTT protocol for centralised firmware rollouts

as well as remote mass parameterisation & data transfer to control centre in IIoT environment

You have any questions about the EOR-3DS?

Our specialists will be happy to help you!


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