700/765-kV AC Substation Design Criteria: Summary of Industry Practices

In order to determine major trends in substation design practices above 700 kV, a survey was made of three major electric utility systems in the United States and Canada. These findings are presented in tabular form for easy comparison of design features and are basically the criteria in use as of June 1, 1969. Some significant variationg in data are explained in the accompanying notes. This informnation should be valuable to companies planning systems in this voltage range and will also serve to be a permanent record of the state of the art at this point in time.