The economical earth fault & short-circuit indicator for analog secondary substations
EOR-1DS
Earth fault and short-circuit indication in a single device
EOR-1DS
The EOR-1DS is a compact device at an economical price that combines earth fault and short-circuit indication. It can be used as non-directionals earth fault and short-circuit indicator (pulse locating) with the supplied Rogowski SR55 phase current sensors or as a directional earth fault and short-circuit indicator (pulse locating + qu2 transient algorithm) with current and voltage measurement. With modern low power sensors, highly accurate measurements can be carried out and transmitted via Modbus RTU. The device is particularly important in times of energy transition to create grid transparency and to cope with changing conditions in power grids.
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EOR-1DS
EOR-1DS
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Reliable and sensitive earth fault direction indication immediately after earth fault occurrence in all network forms
The qu2 transient algorithm as the heart of the short-circuit indicator. Known from its big brother EOR-3DS, it can be used in both compensated and isolated networks for:
- One-Time evaluation of the transient process at earth fault occurrence
- Identification of low and high impedance faults
- Elimination of circulating currents in loop operation mode
Better fault localization using the pulse localization method
For compensated networks with a pulsing facility, the pulse based fault locating algorithm with angle evaluation can be used. By considering the phase angle, it is no longer necessary to operate the network in an overcompensated manner, something that above all reduces the burden on decentralised coils.
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.
The “S” in the name stands for “Sensors”: Our EOR-1DS is optimized for the modern and highly accurate low power sensors of all major manufacturers on the market (ABB, Zelisko, and many more). Of course there is also the possibility of current measurement via Rogowski sensors (SR55) and voltage measurement parallel to a capacitive voltage tester (e.g. Capdis / WEGA). This provides the possibility to determine precise current, voltage and power measurement values evn at the edge of the network.
Also at home in the world of classic voltage converters
EOR-1DS can not only measure the voltage in parallel to a capacitive voltage tester (e.g. Capdis or WEGA) or via low power sensors. The connection of a classic voltage transformer with 100 VAC / 110 VAC secondary voltage is also possible via the U10 adapter.
The same applies to current detection. Besides the possibilities of using the Rogowoski sensors (SR55) or the low power inputs, classic current transformers with 1 A / 5 A secondary current can be connected to EOR-1DS when using the C21/C25 adapters.
Ready for communication and networking
In addition to the connection of the indicator via four freely parameterizable relay contacts and two fixed binary inputs, the earth fault and short-circuit indicator EOR-1DS can also be read out via a Modbus RTU connection via RS485. Here, all information and messages can be queried in the standard register assignment, as well as a large part of the available parameters can be changed.
Intuitive operation via built-in turn-push button
The EOR-1DS can be operated and parameterized completely via the turn-push button. The display is normally in standby mode, i.e. in the switched-off state. It can be activated by pressing the turn-push button on the front of the device. After any pending messages, the statuses and measured values of the phase conductors, the neutral system and the power measured values are displayed on the overview pages. Subsequently, the main menu is accessed and the earth fault and short-circuit indicator can be fully parameterized. Parameterization is also possible via a preconfigured file on the SD card.
Ready to commuicate – even during power cuts
If the supply voltage fails, the display of EOR-1DS remains active. In addition, the built-in long-life capacitor (Super-Cap) guarantees that even message operation can be maintained for at least 4 h (without Modbus communication). If messages are also disposed of via Modbus RTU, communication can be maintained for up to 10 minutes by means of a parameterizable follow-up time.
Short-circuit and earth fault indicators from A. Eberle
EOR-1DS and EOR-3DS for future-proof local network stations
Further earth fault and short-circuit indicators
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News from the Productgroup
EORSys – News
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[…]
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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.[…]
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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[…]
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Blogpost
Kick-off for mass rollout of the digital local network station at Netze BW
31. July 2023
Our product manager Gerald Jacob (EORSys) with a short Q&A at the official kick-off event of the digital secondary station FFU 2.0 at the large German DSO “Netze BW GmbH” in Stuttgart, Germany.[…]
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Product innovation
Product discontinuation: Current Injection CI, as of 30.06.2023
14. July 2023
The Current Injection CI is currently scheduled for product discontinuation.[…]
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Blogpost
Brand New: Short-circuit and earth fault indicator EOR-3DS released on 27.03.2023
27. March 2023
New combined earth fault and short circuit indicator EOR-3DS: AVAILABLE FOR ORDER NOW[…]
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Blogpost
Product Announcement: Short and earth fault locator EOR-1DS released 05.08.2022
23. August 2022
We are pleased to inform you that the product “Combined Earth Fault and Short Circuit Indicator EOR-1DS” is officially released as of today. […]
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Product innovation
Product Announcement: Short and earth fault locator EOR-1DS released 05.08.2022
23. August 2022
Combined earth fault and short circuit indicator EOR-1DS: AVAILABLE NOW![…]
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Product innovation
Product discontinuation: DIN rail housing EOR-3D (characteristic B02) until 30.06.2020
12. April 2022
The EOR-3D with characteristic B02 (article numbers: 119.8500 to 119.8584) is currently planned for product discontinuation.[…]
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Product innovation
Product discontinuation: Short-circuit and earth fault indicator EOR-1D, as of 31.03.2022 (successor will be EOR-1DS)
12. April 2022
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Product innovation
Product care / follow-up device: EOR-3D B01 & B03 become the substantially optimized EOR-3DS
12. April 2022
The EOR-3D with feature B01 or B03 (part numbers: 119.80xx to 119.82xx.xx) is currently planned for product discontinuation.[…]
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Info letter
Info Letter No. 21: The influence of the contact resistance at the earth-fault location on the zero sequence voltage UEN in compensated networks
7. September 2021
The earth fault in compensated networks is usually presented without a contact resistance at the fault…[…]
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Info letter
Info Letter No. 18: Transient relay for high resistance, intermittent and recurrent earth faults (Part 2)
7. September 2021
Figure 3 can also be used for the determination of static earth faults. In an isolated network the entire…[…]
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