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Continuous and secure power generation

Upgrade your generator and transformer protection.

Hitachi ABB Power Grids' latest Relion REG670 Intelligent Electronic Device (IED) takes generator protection to a new performance level, ensuring unrivaled selectivity and sensitivity. Thanks to our extensive domain expertise, our lifecycle management services also ensure the upgrade of existing equipment to the latest technology is a simple and efficient process.

With more than 100 years of engineering knowledge, our grid automation products will empower your business for many years to come. The state-of-the-art IED's have inherited their philosophy and algorithms from previous generations of proven Hitachi ABB Power Grids technology. Ensuring you can be completely confident in the performance of your power plant for many years to come.

With a strong track record of supplying generator and transformer protection, Hitachi ABB Power Grids is committed to protecting your investment.

Since 1964, more than 13,000 generator protection systems have been delivered globally. A total of 4,000 REG670 numerical protection system units have been supplied so far. Its renowned flexibility and adaptability to accommodate customer needs are unique and make it the world's most advanced generator protection solution.

Get to know more

Hitachi ABB Power Grids offers a complete portfolio of services to ensure trouble-free operation and long product lifetimes. These services cover the entire life cycle, from pre-purchase advice, through installation, maintenance, and spare parts, to migration and upgrades. Local support is provided via a global network of Hitachi ABB Power Grids service centers and certified partners.

Upgrade concept for REG216/316 and GSX to REG670 generator protection system.

A successful upgrade starts with proper planning to ensure that the implementation meets the schedule and commitment for on-time power production:

  • The upgrade system REG670 can be connected to the existing hardware interfaces.
  • Reuse of the terminal blocks in the existing cubicle reduces drawing design for the interconnection to the primary equipment.
  • Well-maintained CTs, VTs and wiring can be reused.
  • The REG670 can be adapted to modifications in the primary equipment during the entire life cycle, e.g. the subsequent installation of a generator circuit breaker.

Depending on the customer’s needs, the upgrade may be performed in different ways:

  • The upgrade system REG670 can be connected to the existing hardware interfaces.
  • Reuse of the terminal blocks in the existing cubicle reduces drawing design for the interconnection to the primary equipment.
  • Well-maintained CTs, VTs and wiring can be reused.
  • The REG670 can be adapted to modifications in the primary equipment during the entire life cycle, e.g. the subsequent installation of a generator circuit breaker.

Hitachi ABB Power Grids offers:

  • Upgrade protection systems including engineering
  • Complete cubicle with upgrade system(s) mounted, wired, and tested
  • Consulting
  • Site survey, studies, and reports
  • Project management
  • Engineering and design
  • Installation, commissioning, and start-up activities
  • Training, education, and support

Thermal power plant Aramon has been generating power since 1977, and in 2009 fed 240GWh of power into the national grid, but aging protection hardware needed replacing as part of a major refit to the station. The owner, EDF, wanted to replicate a new high-specification installation delivered to its other facilities by Hitachi ABB Power Grids.

A generator protection system with REG670 meets the requirements for maximum dependability and availability. The differential protection internal/external fault discriminator is based on negative sequence current values, enabling fast and selective operating decisions. The unique main protection functions are able to selectively detect and clear all fault types over 100% of the stator winding. The detection criteria can be used to create intelligent, application-specific functions to enhance your protection system, enabling it to meet very specific requirements, for instance, when the operating conditions of the plant change.

REG670 – for any type and size of generator and generator-transformer unit

REG670 provides customized and pre-configured protection solutions for any type of generator and block connected generator-transformer unit. Due to its unique capabilities it is especially suitable for protecting large turbo and hydro units including pump-storage power plants.

Unique functional integration

REG670 integrates parallel algorithms with advanced logic and communication. Up to 24 analog inputs permit integration of main and back-up protection in one IED. This allows you to protect several objects with a single REG670 IED. For instance, by integrating several differential protection functions, one single REG670 IED can protect a complete generator-transformer unit. The under-impedance protection function can also be used as back-up protection for faults within the unit or external faults in the power network.

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. This reduces the number of IEDs needed to protect the entire generating station, whilst increasing availability. The selector switch can replace an external mechanical selector switch which allows you to directly select the position you desire. In addition, these switch functions can be operated from a remote control system.

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