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Tap-changers and switches

Tap-changers are used to change the turn ratio between windings in a transformer. This ratio determines the voltage ratio between the windings and is essential for the stabilization of network voltage under variable load conditions. This adjustment may be made by an on-load tap-changer, or by a de-energized tap-changer, or by the selection of bolted link positions.

ABB offers a comprehensive portfolio of on-load-tap-changers both the conventional type and vacuum technology for both high voltage and low voltage regulation, in in-tank and on-tank solutions. Our offering includes also a wide range of de-energized tap-changers.

 Why ABB?

  • Over 100 years of experience
  • Proven solutions with decades of successful field experience 
  • Serving variety of transformers in different regions and countries
  • Longest lifetime by using high class material
  • Type tested beyond international standards
  • High reliability by using few parts and low complexity in design
  • Easiest maintenance by using open designs, absence of special tools
  • Life-cycle support
  • Retrofit solutions
  • Easy upgrading to vacuum technology in existing installation

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