Legacy synchronizing equipment

Service and support

ABB offers support for SYNCHROTACT products, which are no longer manufactured. The support comprises spare parts, repair as well as replacement of electronics (relay) with today's SYNCHROTACT 5 covering the same functionality in the existing environment. For detailed information, please refer to the services pages.


SYNCHROTACT legacy products:

  • SYNCHROTACT 1 - First electronic auto synchronizer 1966 to 1974
  • SYNCHROTACT 2 - Auto synchronizer single / dual channel versions 1972 to 1983
  • SYNCHROTACT 3 - Modular synchronizing relays including busbar transfer system (analog) 1981 to 1993
  • SYNCHROTACT 4 - Digital synchronizing relays 1991 to 2002
  • SYNCHROTACT HBT - High speed busbar transfer system 1996 to 2007




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    ABB contact for United States of America

    Service: Jose Ruiz
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