50 / 67 / 83 MVA Generator Step-Up Transformer

This 50 / 67 / 83 MVA Generator Step-Up Transformer, designed and manufactured by Daelim Transformer, is used in a photovoltaic project in the United States. It complies with the latest IEEE standards and relevant regulations. The transformer is a three-phase, three-winding, oil-immersed, conservator-structured HV power transformer. It features a high voltage of 138 kV, a medium voltage of 34.5 kV, and a low voltage of 13.8 kV. It employs a two-stage forced-air cooling system, with a self-cooled capacity of 50 MVA. The capacity increases to 67 MVA with one fan operating (ONAF1), and up to 83 MVA with both fans operating (ONAF2).

Key Features:

• Three-Phase, Three-Winding Design: This oil-immersed conservator-structured transformer features high voltage of 138 kV, medium voltage of 34.5 kV, and low voltage of 13.8 kV, ensuring robust power conversion.
• Flexible Cooling System: Self-cooled capacity reaches 50 MVA. With one fan operational (ONAF1), capacity increases to 67 MVA, and with both fans running (ONAF2), it reaches up to 83 MVA.
• Advanced Oil Preservation System: The sealed conservator tank with positive pressure and moisture filter ensures reliable oil expansion and protection from contamination.
• High-Performance Transformer Oil: Complies with ASTM D3487 with Type II inhibitor or ASTM D6871 Natural Ester standards. It features a minimum open cup flash point of ≥ 300°C and fire point of ≥ 340°C, is PCB-free, and environmentally friendly.
• Reliable Overvoltage Protection: Equipped with station-class gapless MOV surge arresters in polymer, adhering to IEEE C62.22 standards, ensuring comprehensive insulation system protection.
• Ultra-Quiet Operation: Audible sound levels during operation, with both stages of auxiliary cooling equipment running, comply with IEEE C57.12.90 standards, providing a quieter work environment.
• Precision Temperature Monitoring: Includes an electronic monitoring system that continuously measures top oil, winding, and LTC temperatures, ensuring optimal performance and safety.

Strong Earthquake Resistance for Diverse Environments:

• Seismic Qualification: Meets the Moderate Seismic Qualification Level as defined by IEEE Standard 693-2005, ensuring stability and safety even in seismic conditions.

Additional Advantages:

• Convenient Operation and Maintenance: All gauges and displays are easily readable from ground level, eliminating the need to open cabinet doors. Equipped with quick pressure release devices, dry air fill valves, and online gas monitors for ease of maintenance.
• Theft-Resistant Design: External copper bus and cables are securely affixed to prevent theft, safeguarding your investment.
• Comprehensive Spare Parts: Includes all necessary spare parts and gaskets, ensuring efficient maintenance and long-term reliability.

By choosing Daelim Transformer’s 50 / 67 / 83 MVA Generator Step-Up Transformer, you are investing in industry-leading technology, exceptional performance, and unparalleled reliability. We are committed to providing the highest quality power solutions to maximize the benefits of your photovoltaic project.