Dielectric Study and Develpment of Gas-Insulated Transformer

In Japan, demand for electric power has been concentrating in large cities recently, but it has been becoming increasingly difficult to build substations in urban areas because of the difficulty in obtaining land and fireproofing related to them. This has been inviting rapidly growing demand for large-capacity underground substations. Gas-insulated transformers have been finding growing applications primarily in power distribution, and a large number have been installed in densely populated buildings and underground. Recently, large-capacity gas-insulated transformers have been developed and today gasinsulated transformers are coming to be used not only for power distribution but also in large-capacity substations.