Railway application

Rapid urbanization plus the urgent need to reduce carbon dioxide emissions are driving substantial new interest and investment in the transportation sector. Because of their specialized nature, traction power protection and control systems can be challenging.

Hitachi Energy's railway application intelligent electronic device (IED), Relion RER670, is used for the protection, control and monitoring of the transmission lines and/or transformers in a two-phase 16.7, 50 and 60 Hz power system design for railway supply. It supports isolated, compensated and solidly earthed networks.

RER670's line protection covers distance protection functions providing high flexibility with quadrilateral or mho starting characteristic.

On the other hand, transformer protection covers transformer differential protection for two-phase to two-phase as well as two-phase to one-phase transformers. Besides the transformer differential protection, a wide range of backup functions are also available.

A powerful functionality is this device's coverage for catenaries. Catenary distance protection is used as a distance protection for catenary feeders, which supply the moving locomotive through a pantograph.

Further, a very fast transformer tank protection helps to avoid damages in case of short circuits to the transformer tank.

A wide range of control functions can also be included in RER670 to either complement the line or transformer protection IED with advanced control functions or to provide a control IED with optional backup protection.

RER670 provides IEC 60870-5-103 as well as IEC 61850 Edition 2 communication to a substation automation system. While, in the case of IEC 61850 Edition 2, it also provides horizontal communication between IEDs.

In addition, this product provides extensive functionality ready to meet your specific requirements to transform your ever essential rail infrastructure into a much more reliable and future proof system.