Legacy synchronizing products

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 6 covering the same functionality in the existing environment. For detailed information, please refer to the service 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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Technical support and emergency numbers

Contact numbers and addresses for your technical support needs

Technical support numbers

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