AirRIP® flex – the new and highly configurable dry bushing concept for 245–550 kV systems from Hitachi Energy
Reliability and longevity are crucial attributes of the products and services of the energy market.
byLars Jonsson, Teresa Gargano
Bushings in the electric grid
Reliability and longevity are crucial attributes of the products and services of the energy market. This is often necessitated by the huge capital outlays involved and the punitive expense of downtime resulting from breakdowns or failures. The power transformer, with its exceptionally long lifetime of 50 years or more, is a prime example of the market’s response to the need for reliability. This core demand for reliability extends to the myriad components of the electrical network; big or small, each is a critical cog in the wheel. Reliability is also fundamental for high-voltage bushings – whose predominant role is to carry high potential current through an earthed enclosure and prevent flashovers to the ground. Thermal and electrical stress and ambient conditions further emphasize the importance of enabling a prolonged and active life for high voltage bushings.
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In addition, bushings need to be configurable to cover as many requirements as possible without affecting lead times; however, special designs are sometimes necessary for covering exceptional requirements and addressing regional issues. These prerequisites form the basis for the new common bushing technology platform, AirRIP® flex.
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