T&D World Magazine

ABB to Develop 1,200-kV UHV Circuit Breaker

ABB will develop, design and manufacture a 1,200-kV circuit breaker. The innovative circuit breaker will be deployed at a national test station being constructed by Power Grid Corporation of India (PGCIL), India's central transmission utility, at Bina in the central Indian state of Madhya Pradesh. The circuit breaker will being jointly developed by ABB engineers in Switzerland and India, with the support of PGCIL, and will be manufactured at ABB's production facility in Vadodara, India.

ABB's 1,200-kV circuit breaker is safely housed along with the disconnector in a tank filled with insulating gas. This unique design can result in a space saving of up to 60% compared with conventional designs. The configuration protects critical components from environmental exposure and brings down the center of gravity, thereby increasing its ability to withstand seismic events. Other design features include modular ring-type current transformers, partial-discharge sensors and composite bushings.

India is adding significant power-generation capacity to meet growing demand, which requires an efficient and reliable T&D infrastructure to deliver the electricity to consumers. Transmitting at higher voltages enables more power to flow through lines with minimal space impact and significantly lower transmission line losses. These factors have prompted India to develop a 1,200-kV transmission system, which will be the highest AC voltage level in the world.

Visit www.abb.com.

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