A new transformer for base-load stations

This paper describes the application of Hipersil to three 40,000 Kv-a units for the Philo generating station of The Ohio Power Company. Because of Hipersil's ability to carry one-third more magnetic flux, appreciable savings in weight and dimensions are possible — in fact, the transformers will be shipped in oil completely assembled with bushings in place, ready to operate. Forced-oil and forced-air cooling are provided, with proper relays for protection in the event of excessive copper temperature or failure of auxiliaries. Reliability, economy, ease of installation, and low maintenance have been the objectives sought in the design.