De-energized tap-changer type AT

Our high voltage linear type de-energized tap-changers type AT represent a perfect solution for applications in which a low value of partial discharges is required. Space saving design and high-class material assure 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.

• High class material assure 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

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