18 Jul 2025
Hitachi Energy has achieved a major milestone in India’s energy transition by delivering the country’s first 400 kV, 315 MVA three-phase power transformer filled with synthetic ester fluid to Power Grid Corporation of India Ltd. Developed at Hitachi Energy’s advanced manufacturing facility in Maneja, Vadodara, this transformer is the largest of its kind in India in terms of voltage class and capacity.
Hitachi Energy has achieved a major milestone in India’s energy transition by delivering the country’s first 400 kV, 315 MVA three-phase power transformer filled with synthetic ester fluid to Power Grid Corporation of India Ltd. Developed at Hitachi Energy’s advanced manufacturing facility in Maneja, Vadodara, this transformer is the largest of its kind in India in terms of voltage class and capacity.
Built on the company’s Trafostar global platform, the transformer reflects Hitachi Energy’s focus on innovation, sustainability, and support for India’s ‘Atmanirbhar Bharat’ vision—enhancing domestic capabilities in high-performance grid technologies.
The use of synthetic ester fluid offers key advantages over traditional mineral oil, including a high flash point of around 330°C, which significantly reduces fire risk. Being biodegradable, it also minimizes environmental impact, making it ideal for urban and environmentally sensitive locations.
These ester-filled transformers are designed for higher temperature operation and greater load handling, leading to improved energy efficiency and reduced operational costs over time. With this breakthrough, Hitachi Energy reinforces its leadership in sustainable power solutions and supports India’s shift toward a greener, more resilient grid infrastructure.
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