Below is a list of some of the new features in the newly relased Relion® 670 series.
Capacitor bank protection (REC670, RET670)
The capacitor bank protection in REC670/RET670 detects dangerous operation situations and trips before any damage occurs in capacitor units that are vulnerable to different phenomena in power systems. The capacitor bank protection consists of overcurrent protection, undercurrent protection, harmonic overload protection, reactive power overload protection and a reconnection inhibit function. These, together with other protection functions that can be included in the IEDs, such as unbalance protection based on overcurrent protection, provide complete protection for capacitor banks. Read more >
Redundant communication on the station bus (REB670, REC670, RED670, REL670, RET670)
Relion® 670 series IEDs support IEC 62439 standard redundant communications on the station bus. The solution from ABB utilizes the IEC 62439-3 standardized Parallel Redundancy Protocol (PRP). PRP improves the communication system reliability and features a unique capability of zero seconds’ recovery time in case of communication failures. This means that there will be no interruption in communication if one link fails as the other link instantaneously takes over the communication. As a result, there is no data lost when communication failures have occurred.
Negative sequence overcurrent protection (REC670, RED670, REL670, RET670)
The negative sequence overcurrent protection detects all unsymmetrical faults with or without earth connection. It features high sensitivity, which enables detection of faults with low fault current. The negative sequence overcurrent protection can also be used as directional. This facilitates the coordination with protection for other objects.
The four-step negative sequence overcurrent protection can serve as back-up protection for most faults. It can also serve as the main protection for earth faults and other unsymmetrical faults.
IEC 61850-9-2 LE process bus communication (REC670, RED670, REL670, RET670)
Relion 670 series IEDs can also support synchronized sampled measured value communication over the process bus using IEC 61850-9-2 LE which replaces conventional wiring between the process and the secondary system. This enables new design of substations. For example, utilization of sensor technology eliminates problems caused by, for instance, CT saturation and EMC influence. Furthermore, extensions and maintenance of substations can be completed more efficiently as fiber-optic cables are used instead of copper wires.
670 series IEDs allow you to mix conventional wiring and fiber-optic communication with IEC 61850-9-2 LE in a single IED. This way you can shift from conventional wiring for analog data to fiber-optic-based communication for synchronized sampled measured values step by step.