Distance Protection Relay


The E1-Line device is a dedicated transmission overhead line and cable distance protection and control IED; the relay offers complex protection, control and monitoring functions.

The E1-Line relay includes a variety of versatile protection functions such as directionality extension of the configured phase and residual overcurrent functions as well as directional over- or underpower functions. Furthermore, the relay offers binary signal transmission or a teleprotection scheme with the remote-end IED via several types of communication channels. The distance protection function can generate three-phase or single-phase trip commands, depending on the fault types and the requirements. The range of functions is supplemented with the automatic reclosing function, synchrocheck, power swing detection and switch-onto-fault logic. Based on the voltage measurement, the frequency is also evaluated to realize frequency-based protection functions. 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.

The relay can be used as a back-up protection unit or as a decentralized busbar protection sub-unit.

Product details


♦ Native IEC 61850 IED with Edition 2 compatibility.
♦ Scalable hardware to adapt to different applications.
♦ 84 HP or 42HP wide rack size (height: 3U) with several mounting methods: Rack; Flush mounting; Semi-flush mounting; Wall mounting; Wall-mounting with terminals; Flush mounting with IP54 rated cover.
♦ 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 with duration up to 10s and sampling rate up to
      ° Event recorder can store more than 10,000 events.
♦ Wide range of communication protocols:
      ° Ethernet communication: IEC61850;IEC60870-5-104;DNP3.0 TCP;Modbus TCP
      ° Serial communication: DNP3.0; IEC60870-5-101/103; MODBUS, SPA.
♦ Legacy network based protocols via 100Base-FX and 10/100Base-TX (RJ45). Optional communication ports: Fiber optical Ethernet (MM/ST, SM/FC), RJ45, Serial POF, Serial glass fiber, RS-485/422.
♦ 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/SNTP server; Minute pulse; Legacy protocol master; IRIG-B.


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