For maximum reliability of your power system
REL650 – your best choice for sub-transmission applications
REL650 offers optimum ‘off-the-shelf’, ready-made application solutions for protection of single breaker connected power lines and cables. The type tested variants are delivered equipped and configured with complete protection functionality, and with default parameters for easy handling of products – from ordering, engineering and commissioning to reliable operation.
The 650 series IEDs (Intelligent Electronic Device) introduce a number of innovations, such as significantly reduced parameter setting. 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. The parameters related to line distance protection are mostly set as primary ohms, which significantly reduce the need to re-calculate the current and voltage values. This allows the IEDs to be quickly taken into operation. The application manual includes setting examples to support the protection engineer.
Extensive protection for lines and cables
REL650 provides protection of power lines and cables with high sensitivity and low requirements for remote end communication. Measurements and setting of all five zones with several setting groups are realized completely independently to ensure high reliability. The distance protection function is available with both quadrilateral and mho impedance characteristics. This enables coordination with existing distance protection schemes in any power network.
The distance protection is further enhanced with load encroachment adaption, which increases the ability to detect high resistive faults on heavily loaded lines. This is especially useful in sub-transmission networks where high line load needs to be allowed while high resistive faults need to be detected and cleared. The unique load current compensation in zone one prevents unwanted trip at resistive faults and high power transfer on the line. Furthermore, an integrated power swing detection function prevents unwanted operation during power system oscillations caused by disconnection of parallel lines, heavy loads or tripping of large generators.
Designed for IEC 61850
REL650 IEDs are designed for IEC 61850, implementing all the aspects of this standard and thus ensuring open, future-proof and flexible system architectures, with state-of-the art performance. Their performance meets comprehensive communication tasks, for example, GOOSE messaging for horizontal communication. These IEDs provide you with wide application flexibility, which makes them an excellent choice for both new and retrofit installations.
Both REL650 and REL670 line distance protection IEDs offer extensive application opportunities. They feature full scheme distance protection with independent phase selection, power swing detection and a wide range of scheme communication logics. The IEDs with five zone distance protection for phase-to-phase and phase-to-earth faults enable you to protect different overhead line and cable applications using different system earthing principles. The IEDs are also equipped with residual overcurrent protection functions that enable detection and fault clearance of high resistive earth faults, which are common especially in sub-transmission networks.
Relion® – Complete confidence
Line distance protection REL670/650 IEDs belong to the Relion® protection and control product family. The Relion product family offers the widest 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 ABB’s leading-edge technology, global application knowledge and experienced support network, you can be completely confident that your system performs reliably – in any situation.