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REB650 - Busbar protection

One IED for a wide range of high impedance differential protection applications

Hitachi Energy 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) have 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, the 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.

Relion – Complete confidence

High impedance differential busbar protection REB650 IEDs belong to the Relion protection and control product family. The Relion product family offers a wide 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.

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REB650 offers an optimum ‘off-the-shelf’ ready-made solution for applications requiring high impedance differential protection. The type tested REB650 is delivered equipped and configured with complete protection functionality, and with default parameters for easy handling of the product – from ordering, engineering and commissioning to reliable operation.

The REB650 IED continues Hitachi Energy's strong track record in high impedance differential busbar protection applications, starting from analog relay RADHA and other similar relays from previous generations. To date, these relays have been successfully serving utilities for over 50 years.

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