Electricity, Electric currents, Power resources, Electric currents, Direct -- Power supply, Electric currents, Alternating -- Power supply, and High voltages

This thesis presents the prototype of AC voltage supply which can be controlled the frequency in the range of 10 - 500 Hz from DC power supply. This uses to supply the power for high voltage electrical equipment with high capacity load such as underground high voltage cable or GIS etc. Using the AC output voltage through the resonance transformer for increasing the voltage up to 5 kV. Typically, the test system of electrical equipment on-site with 50 Hz is large, the transportation of the testing device is quiet difficult. This test system can be adjusted the frequency of AC output voltage to fit with resonance frequency with the test equipment. This reduces its primary current and size. The results from the test system can be used with the capacitor between 600pF and 48.2nF at testing voltage of 5kV. It is given the resonance frequency at 333 Hz and 45.5 Hz and provide the minimum currents from AC power supply at 637.7 mA and 3.1743 A, respectively.

Building sites, Electricity, Poverty, Power resources, Legislation, Public welfare, Public utilities, Power-plants -- Design and construction, Natural gas, Minutes, Agendas, and Clippings

Files include task force meeting minutes; meeting notices and agendas; study reports; policy statements; position papers; membership lists; newspaper articles; draft and final reports; related memoranda and correspondence. Subjects include utility rates and services; regulatory goals and objectives; Illinois Commerce Commission's role; rate payer assistance; power plant certification; task force organization and operation.

Business -- Congresses, Business education, Business education, Economics, Electricity, Energy industries, Fuel, Power resources, Business education, Economics, Electricity, Energy industries, Fuel, Power resources, Brochures, Manuscripts for publication, Notebooks, Photographs, and Reprints

Personal papers include correspondence between family members, 1907-70, financial and insurance papers, his student notebooks and course books from University of Washington and Harvard University, 1919-30, and family photographs and miscellany; Cornell University material includes Executive Development Program photographs, pamphlets, brochures, and booklets, Business and Public Administration course notes, 1947-70, administrative files, 1948-64, program books, 1951-53, and correspondence, 1948-71; other professional papers include course work at other colleges and universities in Turkey, 1956-63, international seminars in Denmark, Norway, Spain, and Salzburg, 1952-83, Dartmouth, 1968-80, and University of Virginia, 1947-48; documents relating to government agencies such as the Economic Cooperation Administration, 1947-53, Office of Price Adminstration, 1945-46, Committee for Economic Development, 1945-54, Bureau of Business Research, 1929-46, Department of Justice, 1971-72, Department of Commerce, ca.1953, National Bureau of Economic Research, 1968-69, and the War Production Board, 1940's; subject files about the Tennessee Valley Authority, 1927-41, electricity, petroleum, oil, and other industries, 1944-72; also included are manuscript notes and typescript copy for published books, book reviews, and reprints.

World War, 1914-1918, World War, 1914-1918 -- War work, Electric utilities, School enrollment, Military camps, Schools, Telecommunication, Electricity, Military service, Voluntary, Telegraph, Power resources, Radio, Students, Minutes, Questionnaires, Reports, Speeches, and Vouchers

Files include minutes; correspondence; questionnaires; and other papers. Minutes (July 2, 1917 - December 29, 1918) include members' names; organizational plan; and publication, form, and committee activity discussion. Correspondence concerns Great Lakes Naval Training Station YMCA activities; and radio, telegraphy, and buzzer signaling courses. Signal Corps Training School questionnaires submitted to the committee include instructors' names; student capacity; and enrollment. Record also includes signal training class reports; committee membership lists; lists of servicemen with electrical experience; speech texts; and supply vouchers.

World War, 1914-1918, Agricultural produce, Boats and boating, Charities, Church buildings, Conservation of natural resources -- Study and teaching, Draft registration, Power resources, Roads, Inventions, Licenses, Bonds, Children, Electric utilities, Choruses, Electricity, Food, Gardens, Industries, Liberty bonds, Military service, Voluntary, Draft, Securities, Women, Ships, Veterans, Telescopes, and Minutes

Files contain minutes; reports; bulletins; pamphlets; and contributors' name cards issued by council committees (i.e., Neighborhood; Military; Women; Food Production and Conservation; Cook County Auxiliary; Liberty Chorus; Civilian Personnel; Subcommittee of Fuel; Home Registration Service; Advisory Committee on Electrical Industry; Committee on Spyglasses, Binoculars, and Telescopes for the Navy; Draft Board; War Business; Engineering and Inventions; Highways Transport; License Committee for War Aid and War Charities; War Gardens; and the Women's Directing Committee for Children's War Gardens); and other war-related agencies and organizations (i.e., United States Fuel Administration; Non-War Construction Bureau; Commercial Economy Administration; Illinois Volunteer Training Corps in Cook County; YMCA; YWCA; Red Cross; War Savings societies for Liberty Loans; Knights of Columbus) which were compiled for an official state war history. Also included is a service honor roll showing veteran's name; rank; regiment or ship; enlistment place and date; along with the name, address, and relationship of close relatives.

Public buildings, Architects, Electricity, Glass, Marble, Building materials, Contractors, Elevators, Iron, Paint, Stone, Letting of contracts, Carpentry, Contracts, Power resources, Mural painting and decoration, Iron-works, Plaster, Woodwork, and Specifications

Specification, bid, and contract files include correspondence with architects and contractors. Specific projects include foundations and excavation; stone work; marble; scagliola; plastering; painting and frescoing; gas and electrical work; carpentry and other wood work; iron work; plumbing; glass; and elevators. Also included are architects' and commissioners' construction progress reports; durability reports on building stone; and a stone schedule listing dimensions (i.e., linear feet in width and thickness; cubic feet); cost per cubic foot; and aggregate cost for all stone.

Public utilities, Accidents, Electricity, Hydrants, Pipelines, Depreciation, Power resources, Natural gas, Electric utilities, Petroleum, Reservoirs, Water -- Purification, Water, Securities, Taxation, Water utilities, Accidents, Depreciation, Electric utilities, Electricity, Hydrants, Natural gas, Petroleum, Pipelines, Power resources, Public utilities, Reservoirs, Securities, Taxation, Water, Water -- Purification, Water utilities, and Records and correspondence

Annual reports for companies that provide water, electricity, gas, heat, or utility combinations include company name; company organization, reorganization or consolidation dates; investments in other corporations; director and officer information; stockholder voting powers; construction work in progress; company changes within past year; number of employees and their salaries; assets and liabilities; capital stock par value; funded debt; depreciation revenues and expenses; occasionally, accidental deaths or injuries; municipalities and consumers served; products sales amount; electricity, coal, or oil amounts used in production; and statistics (i.e., water pumped; electricity generated; or gas processed). Water company reports include quantities and capacities (i.e., municipal fire hydrants); feet of pipe used in transmission and distribution mains; water supply sources. Electric company reports also include number, capacity, and meter current type; station location; current type produced; amount, cost, and electrical energy supplier name; transmission line voltage; wire frequency, length and type; boiler and steam engine types; hydraulic, gas, and electrical equipment quantity and type; and line mileage. Gas company reports also include coal gas and water gas residual production amount and cost; gas purchase amount by type; gas production carbonizers and generators; coal gas yield per pound of coal; water used per in water gas production; cast-iron or tin gas meters owned or transferred; street, booster, and transmission main type, size and quantity; and distribution main mileage. Heating company reports include whether steam or hot water service; pipe size; and distribution main pipe footage.

Public utilities, Agricultural produce, Electricity, Power resources, Warehouses, Boats and boating, Grain, Natural gas, Steamboats, Telephone companies, Water, Electric utilities, Express service, Grain elevators, Railroads, Telecommunication, Water utilities, and Regulations

Warehouse, telephone, telegraph, railroad, express, steamboat, grain elevator, gas, electric, and heating company annual reports submitted to the commission includes annual lists for each company type. Companies are listed in alphabetical order and numbered. Each list includes company names and addresses; company officer names; and occasionally, report receipt date.

Public utilities, Accidents, Depreciation, Power resources, Motor vehicles, Railroads, Stocks, Water, Electric utilities, Natural gas, Real property, Securities, Electric railroads -- Cars, Water utilities, Electricity, Stockholders, Accidents, Depreciation, Electric railroads -- Cars, Electric utilities, Electricity, Motor vehicles, Natural gas, Power resources, Public utilities, Railroads, Real property, Securities, Stockholders, Stocks, Water, Water utilities, Reports, Regulations, and Records and correspondence

Annual reports from companies that provide a combination of services such as interurban railroads; local streetcar lines; electricity; gas; water; and heat. Reports include company name; company organization date; reorganizaton or consolidation; stockholder voting powers; director and officer names and office addresses; corporations controlled by combination companies; assets and liabilities; property value; deprecitation amount; kind and cost of construction work in progress; capital stock par value; funded debt amount; income account; profit-and-loss account; operating revenues and expenses; changes in the company within the previous year; contract and agreement terms; numbers of employees and the average salary for each position; stockholder names; numbers and values of shares owned; and accidental deaths or injuries (1914).