GITs are used in high voltage applications, typically in the range of 66 kV and above. They are commonly used in substations, where space is at a premium and reliability is paramount. The use of SF6 gas as the insulating medium allows for compact designs, with the transformer and associated equipment housed in a single tank. The main advantages of Gas Insulated Transformer over traditional oil-filled transformers are their high reliability, compact size, and low maintenance requirements.
GITs are designed to operate for decades without requiring major maintenance, and the hermetically sealed tank means that there is no risk of oil leaks or explosions. Gas Insulated Transformer also have a significantly lower fire risk than oil-filled transformers, which can be a significant advantage in areas where fire risk is high, such as in densely populated urban areas. The use of SF6 gas also means that GITs can operate at higher temperatures than oil-filled transformers, which increases their efficiency.
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