C. E. Skinner THE TESTING OF HIGH VOLTAGE LINE INSULATORS Vol. xxvii -1908, pp. 945-951 Proposed specifications for routine and design testing of high-tension line insulators. Discussion, pp. 952-958, by Messrs. Percy H. Thomas, Ralph D. Mershon, Clayton H. Sharp, E. M. Hewlett, Chas. P. Steinmetz, C. E. Skinner, and N. J. Neall. General remarks on insulator test specifications, with special reference to methods of making the rain test. THE DEVELOPED HIGH TENSION NET-WORK OF A GENERAL POWER SYSTEM Paul M. Downing Vol. xxix-1910, pp. 705-719 Brief description of the Pacific Gas & Electric Company's system, with reference to the method of operation through a load dispatcher and also as to practice regarding connection, care and operation of transformers; construction of large capacity high-tension oil switches; lightning arresters and line insulators. Discussion, pp. 720-729, by Messrs. Markham Cheever, L. B. Stillwell, L. R. Jorgensen, E. F. Scattergood, W. F. Wells, John Harisberger, P. M. Downing, A. M. Hunt, A. O. Austin, and C. F. Adams. General remarks on the operation of very large high-tension distribution systems, with special reference to the automatic disconnection of disabled lines; the operation of telephone lines paralleling power lines, and the design of large capacity oil switches. TRANSMISSION LINE CROSSINGS OF RAILROAD RIGHTS-OF-WAY Allen H. Babcock Vol. xxix-1910, pp. 905-909 A brief statement of the problem of transmission line crossing over railways, followed by general specifications for the construction of line crossing over the tracks of the Southern Pacific Railroad. Discussion, pp. 910-926, by Messrs. John Harisberger, A. H. Babcock, A. M. Hunt, C. F. Adams, Lewis B. Stillwell, P. M. Downing, Markham Cheever, Sidney Sprout, J. P. Jollyman, R. W. Van Norden, Ralph D. Mershon, Frank F. Fowle, and Percy H. Thomas. Criticisms and remarks on the Southern Pacific's suggested specifica tions. B. ELECTRICAL FEATURES THE DISTRIBUTION AND CONVERSION OF RECEIVED CURRENTS Henry Gordon Stott Vol. xviii-1901, pp. 125-152 Brief description of the transmission plant for generation, transformation and transmission of electric energy from Niagara Falls to Buffalo. Discussion of operative features: means adopted for the protection of the system; relative merits of synchronous converters and motor-generators; relative merits of various arc lighting systems; difficulties in synchronizing 60-cycle synchronous motors. Discussion, pp. 153-163, by Messrs. Gano S. Dunn, Calvin W. Rice, H. G. Stott, C. P. Steinmetz, Elias E. Ries, Jos. Sachs, Jno. W. Lieb, Jr., and H. D. Reed. Experiences Characteristics of three-phase induction motors for railway service. Relative performance of air-break and oil-break switches. with rubber insulated high-voltage cables. PERFORMANCE OF AN ARTIFICIAL FORTY-MILE TRANSMISSION LINE William S. Aldrich and George W. Redfield Vol. xviii-1901, pp. 339-360 Description of apparatus used to duplicate a long line and account of performance tests under various conditions. Relation between line charging current and resonant rise. Line performance curves for loads of different power-factors-synchronous motors with under, normal and over excitation and with excitation varied to give constant receiver e. m. f. Wave form observed under various load conditions. Discussion, incorporated with that of paper by E. W. Rice, Jr., on "The Control of High-Voltage Systems of Large Power." ELEMENTS OF DESIGN PARTICULARLY PERTAINING TO LONG-DISTANCE F. A. C. Perrine TRANSMISSION Vol. xviii-1901, pp. 361-369 Discussion of effects of line capacity and inductance on regulation, with statement of conditions requisite for best regulation. Qualities of hightension (50,000 to 60,000 volts) line insulation and the importance of continuity of service. Discussion, incorporated with that of paper by E. W. Rice, Jr., on "The Control of High-Voltage Systems of Large Power." THEORETICAL INVESTIGATION OF SOME OSCILLATIONS OF EXTREMELY HIGH POTENTIAL IN ALTERNATING HIGH POTENTIAL TRANSMISSIONS Charles Proteus Steinmetz Vol. xviii-1901, pp. 383-405 Mathematical investigation of the effect of the exponential term in the general equation for alternating-current circuits, followed by numerica! examples showing the nature of disturbances due to opening a short circuit on the line and to connecting the line to a source of alternating current energy. Discussion, incorporated with that of paper by E. W. Rice, Jr., on "The Control of High-Voltage Systems of Large Power." THE ELECTRIC TRANSMISSION OF POWER FROM NIAGARA FALLS Lewis B. Stillwell Vol. xviii-1901, pp. 445-531 Historical outline of the development, design, construction and operation of the electrical equipment of the Niagara Falls power plant. Description of the generators, their design and their performance under tests and in operation. Also a description of the transmission and distribution system, its construction and difficulties encountered in its operation. Discussion, pp. 532-544, by Messrs. L. B. Stillwell, Chas. P. Steinmetz, H. W. Buck, P. M. Lincoln, E. A. Sperry, F. A. C. Perrine, P. K. Stern, H. G. Stott, and Clarence E. Gifford. General discussion of the methods of operation for large transmission and distribution systems with reference to interruptions from various causes. Experience with grounded wire on long lines in the West. Difficulties in operation of railway converter sub-stations in Buffalo. FORMULA FOR CALCULATING THE ELECTROMOTIVE FORCE AT ANY POINT OF A TRANSMISSION LINE FOR ALTERNATING CURRENT M. LeBlanc Vol. xix-1902, pp. 759-763 Discussion, incorporated with that of paper by Chas. P. Steinmetz on "Notes on the Theory of the Synchronous Motor." HIGH-TENSION TRANSMISSION LINES Vol. xxi-1903, pp. 229-231 Introduction by President Chas. F. Scott. THE TESTING OF INSULATORS F. 0. Blackwell Vol. xxi-1903, pp. 239-243 Factors which enter into the selection and testing of line insulators, based upon actual experience in the operation of high-tension lines. Discussion, incorporated with that of paper by W. S. Franklin on "Model Showing Distribution of Electromotive Force and Current Along a Single-phase Alternating-Current Transmission Line." TRANSPOSITION AND RELATIVE LOCATION OF POWER AND TELEPHONE WIRES P. M. Lincoln Vol. xxi-1903, pp. 245-251 Outline of electromagnetic and electrostatic disturbances in telephone lines paralleling high-tension lines, with general directions for minimizing such disturbances. Discussion, incorporated with that of paper by W. S. Franklin on "Model Showing Distribution of Electromotive Force and Current Along a Single-phase Alternating-Current Transmission Line." MODEL SHOWING DISTRIBUTION OF ELECTROMOTIVE FORCE AND CURRENT ALONG A SINGLE-PHASE ALTERNATING-CURRENT W. S. Franklin TRANSMISSION LINE Vol. xxi-1903, pp. 261-262 Description of model and interpretation of its meaning. Discussion (including that of paper by Ralph D. Mershon on "Mechanical Specifications of a Proposed Standard Insulator Pin," paper by F. O. Blackwell on "The Testing of Insulators," paper by P. M. Lincoln on "Transposition and Relative Location of Power and Telephone Wires," and paper by C. C. Chesney on "Burning of Wooden Pins on HighTension Transmission Lines"), pp. 263-325, by Messrs. C. F. Scott, Ralph D. Mershon, M. H. Gerry, Jr., Wm. R. C. Corson, W. C. L. Cory, D. L. General discussion of insulator pins-calculation of strength, electrical and mechanical tests, wood vs. iron. Relative merits of glass and porcelain insulators; tests. Telephone line disturbances from high-tension lines. P. M. Lincoln CHOICE OF FREQUENCY FOR VERY LONG LINES Vol. xxii-1903, pp. 373-376 General discussion of the relative advantages of 60 and 25 cycles for a 200-mile transmission line as regards voltage regulation, charging current and resonance. Discussion, pp. 377-384, by Messrs. B. A. Behrend, F. G. Baum, C. F. Scott, C. O. Mailloux, H. G. Stott, Ralph D. Mershon, D. B. Rushmore, P. M. Lincoln, F. A. C. Perrine and H. A. Storrs. Equation for natural frequency of transmission line with distributed capacity and inductance. Choice of frequency with reference to the operation of the plant as a whole. THE CONDUCTIVITY OF THE ATMOSPHERE AT HIGH VOLTAGES Harris J. Ryan Vol. xxiii-1904, pp. 101-134 Analytical discussion of corona phenomena, reviewing previous experiments of the author and others, followed by account of experimental investigation of corona losses in the laboratory with a cathode tube wave tracer, showing effects of conductor dimensions and atmospheric conditions upon critical voltage, all of which are expressed in equation for critical e. m. f. Discussion, pp. 135-145 and 168-170, by Messrs. C. F. Scott, Samuel Sheldon, Harold B. Smith, P. H. Thomas, Harris J. Ryan, P. M. Lincoln, G. T. Hanchett, Elihu Thomson, Ralph D. Mershon, S. M. Kintner, H. W. Fisher, W. A. Blanck, and C. E. Freeman. General remarks on losses to atmosphere at high e. m. f.'s, with special reference to the critical e. m. f. and the factors which affect it. Difficulties in measuring very high e. m. f.'s. E. M. Hewlett OIL SWITCHES FOR HIGH PRESSURES Comparison of oil-break with air-break switches. Vol. xxiii-1904, pp. 215-216 Discussion, pp. 217-224, 242-245 and 249-251, by Messrs. C. C. Chesney, F. A. C. Perrine, Alex Dow, Ralph D. Mershon, C. F. Scott, P. N. Nunn, C. L. de Muralt, H. F. Parshall, W. A. Blanck, James Lyman, P. Junkersfeld, W. G. Carlton, E. O. Sessions, G. N. Eastman, I. E. Brooke, P. H. Thomas, R. F. Schuchardt, Edw. Schildhauer, H. F. Sanville, W. C. L. Eglin. Experience with oil switches in many large plants. Accounts of tests under short-circuit conditions. Specifications for oil switches and brief reference to some of the mechanical difficulties encountered with present types. WAVE FORM VARIATIONS OF A LONG-DISTANCE LINE George H. Rowe Vol. xxiii-1904, pp. 403-415 Oscillographic records of wave form at different parts of the Standard Electric Company's transmission system under various conditions of operation. Observations showing effect of wave distortion on transformer core losses. Discussion, p. 469, by B. J. Arnold. CONDITIONS FOR CONTINUOUS SERVICE OVER LINES OPERATED IN PARALLEL M. H. Gerry, Jr. Vol. xxiii-1904, pp. 547-550 Brief description of method of operating two transmission lines in parallel. Wiring diagram. Discussion, p. 551, by Messrs. Ralph D. Mershon and P. H. Thomas. Frank F. Fowle THE TRANSPOSITION OF ELECTRICAL CONDUCTORS Vol. xxiii-1904, pp. 659-687 Mathematical development of the theoretical inductance and capacity constants of a system of line conductors. Empirical rules for transposition and discussion of method of dealing with problems under various conditions, such as are met in actual practice. Discussion, p. 689, by Messrs. W. S. Franklin, F. F. Fowle, and W. J. Lansley. AN EXPERIMENTAL STUDY OF THE RISE OF POTENTIAL ON COMMERCIAL Percy H. Thomas Vol. xxiv-1905, pp. 317-354 Brief statement of the principles underlying resonance phenomena in commercial circuits, followed by record of tests on actual transmission lines, showing effect of connecting circuits under many different conditions of grounding, of resonance and of various static disturbances. Also tests of line losses to air and over insulators. Discussion (including that of paper by Charles P. Steinmetz on "HighPower Surges in Electric Distribution Systems of Great Magnitude"), pp. 355-369, by Messrs. H. G. Stott, P. N. Nunn, S. M. Kintner, F. A. C. |