A new protection standard for your valuable assets
REG670 IED (Intelligent Electronic Device) provides protection and monitoring for generators, prime movers and step-up transformers in hydro-, pump-storage-, gas-, combined cycle-, steam- and cogeneration stations. With excellent performance, flexibility and scalability it fulfils the demanding requirements of every corner of the world for both new installations and retrofits.
Based on ABB's extensive experience, REG670 takes generator protection to a new performance level. Up to 24 analog inputs permit integration of main and back-up protection in one IED. Alternatively, additional objects, such as transformers, can be included in the generator protection scope. This enables full duplication of the protection in main one and main two. All this reduces the number of IEDs needed to protect the entire generating station, increasing availability at the same time. This in turn simplifies the installation and reduces its lifecycle cost from commissioning to maintenance and spare parts. Its functions also incorporate intelligent fault criteria to ensure unrivalled selectivity and sensitivity.
A generator protection system with REG670 meets the requirements for maximum dependability and availability. The generator differential protection features extremely fast detection criteria, with a typical operate time of 15 ms - and yet the IED maintains high security.
REG670 also features injection-based 100% stator and rotor earth-fault protection and 3rd harmonic based 100% stator earth-fault protection. These solutions enable a new way to optimize the cost-performance ratio of the protection system in relation to the importance or size of the generating station. ABB's innovated implementation of the injection principle allows injection via a neutral point VT or even via an open-delta VT located in the generator terminals. As no changes need to be made in the primary circuit or in the grounding resistor, the design, installation and commissioning of the protection system is easy and fast. The 3rd harmonic based 100% stator earth-fault protection utilizes the differential principle, which provides high sensitivity and security. This ensures correct operation even during low load conditions.
New features in REG670 released
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Relion® – Complete confidence
Generator protection REG670/650 IEDs are members of 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, the 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.