UNDERGROUND TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY Charles E. Phelps Vol. xxvi-1907, pp. 25-30 Classification of cable faults, followed by seven-year record of the performance of various kinds of power, telephone and telegraph cables. Brief analytical discussion of the causes and remedies for these various faults. No discussion. AN ANALYSIS OF THE DISTRIBUTION LOSSES IN A LARGE CENTRAL L. L. Elden Vol. xxvi-1907, pp. 665-680 Record of four years' study of the losses in a certain large energy distribution system, with an account of methods employed to reduce losses between switchboard and consumer. No discussion. W. S. Moody ALTERNATING-CURRENT FEEDER REGULATORS Vol. xxvii-1908, pp. 255-272 Classification and brief discussion of the relative merits of different methods of feeder e. m. f. regulation, followed by description of the construction and operative characteristics of the transformer and induction type regulators. A brief outline of the development of automatic control and description of applications of the Tirrill contact voltmeter to the control of feeder regulators. Discussion, pp. 273-275, by Messrs. R. G. Black, J. Kynoch and R. S. Kelsch. Experience with the Tirrill and induction type regulators. HIGH-POTENTIAL UNDERGROUND TRANSMISSION Vol. xxvii-1908, PP. 1499-1527 P. Junkersfeld and E. O. Schweitzer Description of the underground cable system of the Commonwealth Edison Company of Chicago with records of its performance and results of experiments to determine the magnitude and frequency of occurrence of potential rises in the system. Discussion, pp. 1528-1569, by Messrs. L. A. Ferguson, Charles H. Merz, H. W. Fisher, H. G. Stott, E. J. Berg, Wallace S. Clark, Alex Dow, Warren Partridge, E. E. F. Creighton, L. T. Robinson, Henry Floy, John W. Lieb, Jr., Philip Torchio, Charles P. Steinmetz, E. O. Schweitzer, Peter Junkersfeld, Ralph D. Mershon, H. W. Peck, A. E. Kennelly, N. J. Neall, L. L. Elden, M. V. Ayres, G. W. Palmer, Jr., and Dugald C. Jackson. Cable experience of various large central stations and transmission companies. Elihu Thomson CONDITIONS AFFECTING STABILITY IN ELECTRIC LIGHTING CIRCUITS Vol. xxviii-1909, pp. 1-22 Historical résumé of the development of arc lighting machines and systems. Characteristics of arc dynamos; constant-current transformers; mercury arc converters; constant-current and constant-potential arc lamps with special reference to stability of operation. Discussion, pp. 23-50, by Messrs. A. E. Kennelly, Alex Dow, E. W. Rice, Jr., Dugald C. Jackson, C. M. Green, John B. Taylor, H. G. Stott, Elihu Thomson, E. A. Sperry, and Charles P. Steinmetz. Early experiences with arc lighting systems. Broad definition and examples of various kinds of electrical and mechanical instability. manent and transient volt-ampere characteristics of arcs. Per HIGH-VOLTAGE TRANSFORMERS AND PROTECTIVE AND CONTROLLING K. C. Randall Vol. xxviii-1909, pp 189-207 Description of types of apparatus, with estimates of relative costs of outdoor and indoor installations. Operation of outdoor transformer stations. Discussion, incorporated with that of A. B. Reynders' paper on "Condenser Type of Insulation for High-Tension Terminals." 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. 16. CONTROL REGULATION AND SWITCHING A. SPEED CONTROL SPEED REGULATION OF PRIME MOVERS PARALLEL OPERATION OF ALTERNATORS Discussion, incorporated with that of paper by W. I. Slichter on “Angular Velocity in Steam Engine in Relation to Paralleling of Alternators." PARALLEL OPERATION OF ENGINE-DRIVEN ALTERNATORS W. L. R. Emmet Vol. xviii-1901, pp. 745-751 Account of the development of an anti-surging device for application to engine governors to enable parallel operation of alternators under all conditions of load. Discussion, incorporated with that of paper by W. I. Slichter on "Angular Velocity in Steam Engine in Relation to Paralleling of Alternators." A NOVEL COMBINATION OF POLYPHASE MOTORS FOR TRACTION PURPOSES Ernst Danielson Vol. xix-1902, pp. 527-539 Description of a system of concatenating two motors of unequal numbers of poles so as to get four running speeds. Comparison of acceleration characteristics, torque, energy, efficiency, etc., with direct-current series, plain induction and concatenated induction motors. Abstracted by Dr. Chas. P. Steinmetz on page 495. Discussion (including that of paper by Carl L. DeMuralt on "Some Notes on European Practice in Electric Traction with Three-Phase Alternating Current"), pp. 540-555, by Messrs. C. P. Steinmetz, C. O. Mailloux, Henry G. Stott, W. N. Smith, W. J. Hammer, Townsend Wolcott, Frederick V. Henshaw, and C. L. DeMuralt. A VARIABLE RELUCTANCE METHOD OF MOTOR SPEED CONTROL G. Fred Packard Vol. xix-1902, pp. 1131-1141 Reference to earliest work in this direction. Description of the Johnson method of varying the reluctance at the pole face, while maintaining the commutating fringe. Performance tests and flux distribution curves of a Stow motor built on these principles. Discussion, pp. 1142-1143, by Chas. P. Steinmetz, William Esty, G. Fred Packard, P. H. Thomas, and E. B. Raymond. Description of the operation of adjustable speed motors from three wire generator, giving advantages of the system and the range of speed variation when combined field and armature control are used. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous Current Motors for Machine Tools." H. P. Coho THE STORAGE BATTERY AS A FACTOR IN SPEED CONTROL Vol. xx-1902, pp. 135-138 Brief description of electric drive for Hoe printing press, using storage battery for multi-voltage. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous Current Motors for Machine Tools." Geo. W. Fowler A SERIES-PARALLEL SYSTEM OF SPEED CONTROL Vol. xx-1902, pp. 143-153 Description of controller and its mode of operation as applied to double commutator driving Webb press. Discussion, incorporated with that of paper by F. O. Blackwell on "Continuous Current Motors for Machine Tools." F. 0. Blackwell CONTINUOUS-CURRENT MOTORS FOR MACHINE TOOLS Vol. xx-1902, pp. 159-165 Power characteristics and requirements of various classes of machine tools. Brief mention of the different methods of speed control of electric motors and the advantages and limitations of each. Discussion (including that of paper by R. T. E. Lozier on "The Operation of Machine Shops by Individual Electric Motors;" paper by N. W. Storer on "Three-Wire System for Variable Speed Motor Work;" paper by H. B. Coho on "The Storage Battery as a Factor in Speed Control;" paper by P. O. Keilholtz on "Electrically Operated Coal Hoist Having Variable Speed Control;" paper by Geo. W. Fowler on "A Series-Parallel System of Speed Control," and paper by H. Ward Leonard on "MultipleUnit, Voltage Speed Control for Trunk Line Service"), pp. 166-195, by Messrs. Gano S. Dunn, Chas. F. Scott, H. E. Heath, S. T. Dodd, Arthur Williams, Philip Lange, Chas. Day, R. T. E. Lozier, N. W. Storer, H. Ward Leonard, Herbert Dowe, H. B. Coho, Geo. A. Damon, R. W. Stovel, Geo. B. Dusinberre, W. A. Dick, P. M. Lincoln, Campbell, Chas. G. Winslow, E. M. Tingley, Barr, R. H. Pierce, Peter Junkersfeld, O. E. Osthoff, D. C. Jackson, B. J. Arnold, G. B. Foster, Ernest Gonzenbach, V. R. Lansingh, H. H. Cutler, F. J. Pearson, and H. R. King. Stevenson, Relative merits of various methods of speed control of direct-current motors. Conditions which determine the choice between individual and group drive. Effects of motor drive and suitable speed control on shop efficiency. Advantages and disadvantages of the Ward-Leonard system of locomotive driven from single-phase circuits. Wm. Cooper METHODS OF SPEED CONTROL Vol. xx-1902, pp. 197-213 Outline of the general power requirements of the different classes of machine tools. Description of method of choosing proper size of motor for given service and speed range from a speed horse-power diagram for combining multiple voltage and field regulation; numerical examples. Set of general rules for determining motor size. No discussion. A NEW METHOD OF TURBINE CONTROL Lamar Lyndon GAS-ENGINE REGULATION FOR DIRECT-CONNECTED UNITS Charles E. Lucke Vol. xxvi-1907, pp. 1-24 General discussion of speed regulation problems, defining the function of governors, fly-wheels and valve gears, and listing the variables that enter into the problem. The use of crank-pin force and speed diagrams, in the solution of such problems, is suggested and its application to steam turbine operation used as an illustration. A number of papers before the A. I. E. E. and A. S. M. E. on this subject are abstracted and commented upon. No discussion. REGENERATION OF POWER WITH SINGLE-PHASE ELECTRIC RAILWAY MOTORS William Cooper Vol. xxvi-1907, pp. 1469-1480 General requirements and motor characteristics necessary for successful regenerative control. Theory of regenerative control of single-phase series motors with examples of its practical applications. Discussion, pp. 1481-1484, by Messrs. W. I. Slichter, L. B. Stillwell, J. C. Lincoln, and William Cooper. Compounding effect utilized to improve power-factor of returned energy. Advantages of regenerative control. C. F. Henderson ELECTRIC CONTROL FOR ROLLING MILL MOTORS Vol. xxviii-1909, pp. 897-912 Brief outline of essential requirements of controllers for motors operating ore handling machinery and rolling mills, with description of contactor type controller and various applications of automatic controllers in and about a steel mill. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." AUTOMATIC MOTOR CONTROL H. E. White Vol. xxviii-1909, pp. 913-920 Advantages and operative characteristics of contactor switch, and description of various systems of automatic control; current limit; counter e. m. f.; time limit, and pilot motor. Discussion, incorporated with that of Mr. R. Tschentscher's paper on "Electric Power Problems in Steel Plants." |