Hitachi ABB Power Grids introduces a compact solution for high impedance differential protection. The REB650 is designed primarily for the protection of single busbars with or without sectionalizers in high impedance based applications, but it also offers high impedance differential protection for generators, autotransformers, shunt reactors and capacitor banks. Its I/O capability allows you to protect up to three 3-phase high impedance differential protection zones with a single IED.
REB650 ensures 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. It can also handle all internal multi-phase faults in isolated or high impedance earthed power systems.
The 650 series IEDs (Intelligent Electronic Device) has a number of useful features, such as a significantly reduced number of parameter settings and extended IED HMI functionality, including 15 dynamic three-color indication LEDs per page, on up to three pages, and configurable push-button shortcuts for different actions. In the 650 series IEDs, most basic parameters are set before delivery from the factory. You only need to set the parameters specific to your application. This allows you to quickly take your IEDs into operation. The application manual includes setting examples to support your protection engineers.