elcome dear friends of protection, control and electrical engineering. Today we would like to introduce you to the brand new EOR-3DS from A. Eberle GmbH & Co. KG. Here we go.
Introduction
With the EOR-3DS, A. Eberle GmbH & Co. KG sends the successor for the widely used EOR-3D into the race.
Similar to its predecessor, the EOR-3DS offers combined short-circuit and ground fault location in one compact device. It primarily convinces with a variety of locating methods, which are used in compensated as well as in isolated networks. In detail these are:
Isolated networks
🌐 Transient ground fault detection for one-time faults (qu2 and qui methods)
🌐 Transient ground fault detection for restricing faults (qui method)
🌐 Transient ground fault detection for faults in loops with large circulating currents (qu2 method)
🌐 Reactive power direction protection in the zero-sequence system (sin-phi method)
🌐 Directional or non-directional short-circuit indicator with configurable reset time
Compensated networks
🌐 Transient ground fault detection for one-time faults (qu2 and qui methods)
🌐 Transient ground fault detection for intermittend faults (qui method)
🌐 Transient ground fault detection for faults in loops with large circulating currents (qu2 method)
🌐 Active power direction protection in the zero-sequence system or Wattmetric method (cos-phi method)
🌐 Harmonic method or evaluation of the reactive power direction in the zero-sequence system of freely selectable frequency ranges
🌐 Pulse location
🌐 Directional or non-directional short-circuit indicator with configurable reset time
This wide range of functions is impressive and optimally covers the decisive fault scenarios. With the sophisticated and proven algorithms, the EOR-3DS can even reliably locate ground faults with fault resistances in the kOhm range. The perfect combination of the above-mentioned location methods and a clever prioritization and thus weighting makes the EOR-3DS a unique helper for short-circuit and ground fault location in classic as well as digital secondary substations.
Digitization for secondary substations
The possible role of the EOR-3DS as a digitization unit for secondary substations is trend-setting and new. A large number of different protocols are supported, which can be used individually or in parallel (including IIoT protocols via MQTT). Using the Modbus master function, the EOR-3DS can connect up to 6 devices (manufacturer-independent!) via Modbus RTU as Modbus slaves and translate the data into any other supported protocol and thus work as a control technology 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 EOR-3DS can perform a digital interface function in digital secondary substations in addition to classic ground fault and short circuit location. This turns the small short-circuit and ground-fault indicator into a completely new class of device:
EOR-3DS as digitization unit for secondary substations
The digital secondary substation station is a crucial component for distribution network operators to automate, monitor and efficiently operate their networks. These digital local network stations will be an essential element of the smart network of the future. As a result, distribution system operators are facing new challenges such as the large-scale roll-out of networked devices distributed throughout the utility grid. The EOR-3DS in its function as a digitizing unit for secondary substations enables distribution network operators to operate the digital secondary substation in large numbers in their networks in a future-proof manner.
The measurement data acquisition
How is the measurement data acquisition done with the EOR-3DS? First of all, the device can be integrated into the primary system via the classic transformer world. To use conventional current and voltage transformers, the C21/C25 adapters or the UI0 adapter are required.
In addition, the EOR-3DS can be connected by means of capacitive voltage tester (e.g. Capdis / WEGA) for voltage measurement. The EOR-3DS is also optimized for use with modern small signal sensors and "talks" to the sensors of most manufacturers on the market.
What else is there?
Using the LUA programming language, customer-specific functions can be implemented in the 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.
Further information
On 08/05/2023, 01:00 CEST a free webinar will take place, which is offered by the manufacturer. All further information about the EOR-3DS and the webinar can be found here.
Warm wishes,
Your EEA-Team
