ABB Energizes Transformer at record 1.2 mln Volts

ABB has developed, manufactured and energized a 1,200-kilovolt (kV) ultra-high-voltage power transformer to support India’s plans to build a 1,200 kV transmission system, supplementing the existing 400 kV and 800 kV transmission grid as demand for electricity increases. The transformer was manufactured and tested at ABB’s state-of-the-art Vadodara facility in India.

This 1.2 million volt transformer represents the highest alternating current voltage level in the world and is installed at the national test station at Bina, Madhya Pradesh in Central India, as part of a collaborative initiative by the country’s central transmission utility, Power Grid Corporation of India Limited (POWERGRID).

India’s geographic span means that resource-rich generation centers and urban and industrial load centers are often far apart therefore requiring efficient power transmission. Along with the country’s commitment to enhance the contribution of renewables, these factors are driving the development of an ultra-high-voltage transmission infrastructure.

The 1,200kV transmission system will help strengthen the grid and enhance load capacity up to 6,000 megawatts (MW). Transmission at higher voltages enables larger amounts of electricity to be transported across longer distances, while minimizing losses. At the same time, less space is needed for fewer transmission lines, which reduces the environmental impact and overall cost.

“ABB has a pioneering track record in India and this 1,200 kV achievement is another concrete example of our commitment to support the country in the ongoing development of its power infrastructure” said Claudio Facchin, President of ABB’s Power Grids division. “This project also underlines how ABB delivers differentiated value through innovation and customer collaboration, both key elements of our Next Level strategy.”

In addition to the transformer, ABB has also developed a 1,200 kV circuit breaker that was previously commissioned at the test station. This was the first hybrid gas insulated switchgear in the world to be energized at this voltage level. The uniquely designed circuit breaker is safely housed with the disconnector in a tank filled with insulating gas – resulting in a space saving potential of up to 60 percent compared with conventional designs.