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Transformer protection and control RET630 IEC

Flexibility and high functionality for two-winding transformer protection and control applications

RET630 is a comprehensive transformer management relay for the protection, control, measurement and supervision of power transformers, including step-up transformers, and power generator-transformer units in utility and industrial power distribution systems. RET630 is also ideal for transformer bay control.


  • RET630 has been designed to be the main protection and offer full protection for two-winding power transformers

Product benefits

  • Freely configurable functionality to meet application specific requirements
  • Extensive functionality and scalable hardware for the most demanding applications
  • All-in-one solution with integration of protection, control, monitoring and supervision in one relay
  • Large integrated or detached HMI with user configurable push buttons, making it easy to use
  • Extensive life-cycle services

Product features

  • Transformer differential protection, thermal overload protection, voltage protection, and hot spot and aging rate monitoring
  • Optional automatic voltage regulation of power transformers with a motor driven on-load tap-changer
  • 8 RTD/mA inputs and 4 mA outputs
  • Supports native IEC 61850 Edition 1, including GOOSE messaging for less wiring and supervised communication
  • Supports DNP3 (TCP/IP) and IEC 60870-5-103

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