Power Transformers (ONAN/KNAN) 66-330 kV

Hunter Transformers supply a complete range of High Voltage (HV) Oil-Filled Power Transformers, designed to deliver high efficiency, reliability, and long service life across diverse applications. Using ONAN (Oil Natural Air Natural) and KNAN (K-type Oil Natural Air Natural) with forced air cooling options. Our transformers are built to perform in demanding environments while ensuring effective heat dissipation and stable operation.

These transformers are ideally suited for utility networks, renewable energy projects, mining, heavy industry and large commercial installations such as Data Centres where dependable performance and continuous duty are critical. With robust tank construction, advanced insulation systems, and high-quality cooling oils, our oil-filled transformers are engineered for thermal stability, electrical reliability, and reduced maintenance needs. The use of K-Class fluids in KNAN designs also provides enhanced fire safety and environmental benefits, making them well-suited for sensitive or high-risk locations.

By combining proven manufacturing expertise with customised design capability, Hunter Transformers delivers oil-filled transformers that not only meet Australian and international standards but also align with project-specific requirements for safety, efficiency, and operational resilience.

Technical Specifications:

• Primary Voltage Rating: 66kV to 330kV.
• Secondary Voltage Rating: 11kV to 132kV.
• Power rating: up to 350MVA ONAN/ONAF.
• Single phase (1ph) and Three phase (3ph).
• De-energised Tap Changer (DETC) or On-Load Tap Changer (OLTC).