REL670 - Transmission line distance protection

REL670 IEDs (Intelligent Electronic Device) provide versatile protection, monitoring and control functionality with maximum flexibility and performance optimized for transmission overhead lines and cables. The powerful IED provides distance protection for double circuit, parallel operating and series compensated lines. This, together with flexible and expandable hardware, allows the IED to meet your specific requirements. As a result, you can benefit from applications with multiple algorithms and comprehensive bay control functionality, including synchronizing, synchro-check, deadline detection and auto-reclosing.

Furthermore, REL670 IEDs are able to protect and control several objects, for instance a combination of a line and a transformer with a single IED.

REL670 provides protection of power lines with high sensitivity and low requirement on remote end communication. Measurements and setting of all six zones with six setting groups are made completely independent, which ensures high reliability for all types of lines. The distance and earth-fault protection functions can communicate with remote end in any communication scheme. It offers full control and interlocking functionality required for control of apparatuses in a substation.

REL670 provides both customized and pre-configured protection solutions. The pre-configured IEDs are equipped with complete functionality adapted for four different configuration alternatives.

Line distance protection REL670 and REL650 IEDs belong to the Relion protection and control product family. The Relion product family offers the widest range of products for the protection, control, measurement, and supervision of power systems. To ensure interoperable and future-proof solutions, Relion products have been designed to implement the core values of the IEC 61850 standard. With Hitachi Energy's leading-edge technology, global application knowledge, and experienced support network, you can be completely confident that your system performs reliably – in any situation.