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AT (Um ≤ 300 kV, Ir ≤ 650 A) IEC
De-energized tap-changer type AT


Our high voltage linear type de-energized tap-changers type AT represents a perfect solution for applications in which a low value of partial discharges is required. Space-saving design and high-class materials ensure the best performance and reliability.

Hitachi Energy offering includes a wide range of single-phase and three-phase, fixed point or bridge type AT de-energized tap-changers, which are configurable to specific customer’s needs.

Product scope

  • Oil-filled transformers
  • range: Um ≤ 300 kV, Ir ≤ 650 A
  • Compliant with IEC standards
  • Material excellence allows use in tropical environments

Why Hitachi Energy

  • High-class material assures the longest lifetime
  • Proven solutions with decades of successful field experience.
  • Type tested beyond international standards.
  • High reliability by using few parts and low complexity in design
  • Little to no maintenance
  • Space-saving designs
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