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Shunt reactors

A shunt reactor is an absorber of reactive power, thus, increasing the energy efficiency of the system. It is the most compact device commonly used for reactive power compensation in long high-voltage transmission lines and in cable systems. The shunt reactor can be directly connected to the power line or to a tertiary winding of a three-winding transformer.

The shunt reactor could be permanently connected or switched via a circuit breaker. 


Hitachi Energy gapped core shunt reactor

Most oil-immersed shunt reactors manufactured by Hitachi Energy are based on the so-called gapped core concept. This technical concept is based on the core type of technology that has been used within Hitachi Energy since the beginning of the 1970s.

Product scope

  1-phase 3-phase
Reactive power* 110 Mvar 300 Mvar
Voltage* Up to 800 kV Up to 800 kV

* only as a reference, limitations on voltage and reactive power may vary according to the capabilities of the test facilities

  • ANSI and IEC standards
  • Applications: utilities, renewables, and industrial


Why Hitachi Energy is the preferred partner?

  • Since 1960, we have delivered more than 3,000 shunt reactors to 70 countries worldwide
  • Robust design and production excellence ensure exceptional and proven field reliability
  • The lowest total cost of ownership in the industry
  • Lowest Mean Time Between Failures (MTBF) figure in the industry
  • Hitachi Energy  utilizes a focus factory concept which leads to a great experience with specific products giving a very high level of consistency in design, manufacture, and test
  • All Hitachi Energy factories utilize the common design platform giving us best-in-class experience, consistency, and repeatability
  • Hitachi Energy utilizes best-in-class manufacturing and quality processes to ensure that our reactors will meet the most stringent requirements
Shunt Reactor

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