A low oleic acid rapeseed oil based transformer fluid. The low oleic acid rapeseed oil is chemically modified to have improved electrical properties by the method comprising deacidifying the rapeseed oil with an alcoholic alkali; removing soap and residual alkali in the deacidified oil by washing the oil with hot wa...
A natural convection cryogenic cooling system for a superconductor transformer. The cooling system (1) comprises a cryostat (2) of double walled construction (2a, 2b) describing a central bore (3) and having a top flange (4) closing the top thereof. The space (5) between the walls of the cryostat is evacuated. The s...