Overview

The E8-TR is a dedicated two-winding transformer protection and control IED; the relay provides complex protection, control and monitoring functions for two-winding power transformers. It is member of the DTRV product type in the EuroProt+ product family.

The DTRV type is designed particularly for protection and control applications of power transformers and generators including generator-transformer blocks. Additionally, the DTRV product type includes a variety of versatile protection functions to meet the users´ most exacting requirements.

Because of the implemented control, measuring and monitoring function, the IED can also be used as a bay control unit.

The EuroCAP configuration tool, which is available free of charge, offers a user-friendly and flexible application for protection, control and measurement functions to ensure that the IED-EP+ devices are fully customisable.

General features

• Native IEC 61850 IED with Edition 2 compatibility
• Scalable hardware to adapt to different applications
• 84 HP or 42HP wide rack size (height: 3U)
• The pre-defined factory configuration can be customized to the user’s specification with the powerful EuroCAP tool
• Flexible protection and control functionality to meet special customer requirements
• Advanced HMI functionality via color touchscreen and embedded WEB server, extended measuring, control and monitoring functions
• User configurable LCD user screens, which can display SLDs (Single Line Diagrams) with switchgear position indication and control as well as measuring values and several types of controllable objects.
• Various protection setting groups available
• Enhanced breaker monitoring and control
• High capacity disturbance recorder (DRE) and event logging (data is stored in non-volatile memory):
• DRE for up to 32 analogue and 64 digital signal channels.
• Event recorder can store more than 10,000 events.
• Several mounting methods: Rack; Flush mounting; Semi-flush mounting; Wall mounting; Wall-mounting with terminals; Flush mounting with IP54 rated cover.
• Wide range of communication protocols:
• Ethernet-based communication: IEC61850; IEC60870-5-104; DNP3.0 TCP; Modbus TCP
• Serial communication: DNP3.0; IEC60870-5-101/103; MODBUS, SPA
• The EuroProt+ family can handle several communication protocols simultaneously.
• Built-in self-monitoring to detect internal hardware or software errors
• Different time sources available: NTP server; Minute pulse; Legacy protocol master; IRIG-B000 or IRIG-B12X

Application

The E8-TR is a dedicated two-winding transformer protection and control IED; the relay provides complex protection, control and monitoring functions for two-winding power transformers. It is member of the DTRV product type in the EuroProt+ product family.

The E8-TR relay provides a variety of versatile protection functions along with the main transformer impedance protection, such as 3ph, Io and I2 overcurrent protection, restricted earth-fault protection etc.

The multiple instances of the implemented three-phase and residual overcurrent functions are provided for the segregated protection of both transformer windings.

Furthermore, several voltage-based protection functions are available for one transformer winding based on the three-phase voltage measurement. The connections of the voltage measurement depends on the current application.


It can be used as a back-up protection relay for downstream equipment (e.g. feeders, cables).

The IED includes a wide range of control and supervisory functions, which provide full control and user-defined interlocking schemes for the primary switchgear at the substation.

scope of application

• 2-winding transformer protection and control device with impedance protection, restricted earth fault protection and several additional protection functions;
• The versatile protections functions can provide back-up protection relay for downstream equipment (e.g. feeders, cables etc.),
• Several voltage-based protection functions are available through the three-phase voltage measurement,
• Current unbalance detection of Current Transformers,
• Programmable interlocking schemes,
• Optional transducer I/Os (RTD/mA),

Protection & control functions

The E8-TR IED measures three phase currents, the residual current and, additionally, three phase voltages. These measurements allow, in addition to the current- and voltage-based functions, directionality extension of the configured residual overcurrent function as well as execution of impedance and restrictive earth fault protection functions.

The main protection function in this application is the impedance protection, which can be utilized for transformers, where only one CT is available and therefore differential protection is not possible.

Documentation

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