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ABB has announced that it is working on a 1,200 kilovolt (kV) circuit breaker, the highest AC voltage level in the world. Developed jointly in Switzerland and India, the finished circuit breaker will then be deployed at a test centre being constructed by Power Grid Corporation of India in Bina in central India.
The design sees the circuit breaker and disconnector housed in a protective tank with insulating gas, which the company claims provides a space saving over conventional designs of up to 60%. Components are also protected from environmental exposure and are better able to withstand seismic events.
ABB has stated that the advantage of transmitting at higher voltages is that more power flows through lines with 'significantly lower transmission line losses'. India is currently ramping up its power generation capacity and is consequently seeking the most efficient transmission to meet increasing demand.