State-of-the-art busbar protection from the leading supplier
The REB 670 IED (Intelligent Electronic Device) is designed for the protection and monitoring of busbars, T-connections and meshed corners from medium to extra high voltage levels. Due to its extensive I/O capability, REB 670 protects single and double busbars with or without transfer bus, double circuit breaker or one-and-half circuit breaker arrangements.
It provides selective, reliable and fast fault clearance for all types of internal phase-to-phase and phase-to-earth faults in solidly earthed or low-impedance earthed power systems. This IED features extremely short operate time, typically 12 ms, for most internal faults regardless of number of connected feeders. At the same time, it maintains complete stability for external faults, even when heavy CT saturation occurs. It can also handle all internal multi-phase faults in isolated or high-impedance earthed power systems.
REB 670 provides complete busbar protection including differential protection and flexible software based dynamic zone selection (disconnector replica) integrated in one IED. This enables dynamic CT connections to differential zones, as well as selective busbar and breaker failure tripping, disconnector and circuit breaker status supervision. Due to its unique measuring principle, this IED has very low CT requirements compared to other numerical differential protection.
Belonging to the 670 series, REB 670 provides all platform and concept based benefits common for all 670 series products.
- REB 670 operates correctly for all types of faults
- REB 670 provides maximum safety for your substation personnel
- REB 670 enables significant savings in configuration, setting, erection, commissioning and maintenance costs as well as in space requirements