operation design and construction of impulse generators

... A—Recommendations and considerations related to the design and construction of tank foundations, p 372R-20 CHAPTER 1—GENERAL 1.1—Introduction The design and construction of circular prestressed ... concrete and prestressed concrete design and construction given in ACI 318-99, ACI 350-01, and ACI 301 Design and construction recommendations cover the following elements or components of circular-wrapped ... evaluate unusual design requirements 2.4—Roof design 2.4.1 Flat concrete roofs—Flat concrete roofs and their supporting columns and footings should be designed inaccordance with ACI 318-99 and should...

Ngày tải lên: 24/10/2014, 17:26

... practices GENERATORS AND EXCITERS Electrical energy Generator operationn Types of generators AC generators Alternator types Design Characteristics of generators. Exciters ... Proper installation and maintenance of oil filters and mechanical operation of the engineare equally important for treatment of oil Preven-tion of contamination and removal of contaminantsshould ... should be proof and constructed of poured concrete or concreteand cinder blocks with a roof of reinforced concrete,steel, or wood supports with slate or other fireproofshingles Ventilation and openings...

Ngày tải lên: 05/03/2014, 18:20

... cracks, deformation and absence of scratches, nicks, etc (c) Thrust bearings for cracks and deforma-tion; surfaces for smoothness and absence of scratches and nicks (d) Camshaft cams and cam faces ... connect-ing rods and bearconnect-ings, pistons (includconnect-ing rconnect-ings and pins), timing gear mechanisms, and auxiliary or accessory drives All of these parts are engineered and designed by ... penetrant method and for bending and for parallelism; bearings for highly pol-ished condition and absence of scratches, nicks, cracks, and deformation (f) Pistons for cracks and warped condition;...

Ngày tải lên: 12/08/2014, 16:21

... strength of the mag-netic field, the number of coils (and number of wind-ings of each coil), and the speed at which the rotor turns b Current Current is the rate of transfer (flow) of electricity, ... number of turns f = line frequency (h) The generated voltage is proportional to the strength of the magnetic field, phase, and number of turns in series between terminals and the speed 4-6 Design ... frequency of the output voltage are synchronous generators Synchronous generators are usually called alternators 4-5 Alternator types 4-3 Types of generators Depending on the type of generating...

Ngày tải lên: 12/08/2014, 16:21

... and a cumulative record of typical equipment operational items as follows: (1) Hours of operation since last bearing lubri-cation (2) Hours of operation since last brush and spring inspection or ... end of the armature shaft On some generators, one end of the shaft is supported by the coupling to the prime mover and one bearing is used at the other end The selections of bearing type and ... switchgear consists of major and related elements as in low voltage switchgear Refer to paragraph 5-4 for de-tails Construction of circuit breakers employed in the two types of switchgear and the methods...

Ngày tải lên: 12/08/2014, 16:21

... abnormal operation of the system or equipment is observed Maintenance personnel must then refer to records for interpretation and comparison of performance data (i.e., log sheets) Comparisons of operation ... abnormal operation of the system or equipment is observed Maintenance per-sonnel must then refer to records for interpretation and comparison of performance data (i.e., log sheets) Comparisons of operation ... consist of three func-tional elements: main contacts to connect and dis-connect the load to and from the sources of power; sensing circuits to constantly monitor the condition of the power source and...

Ngày tải lên: 12/08/2014, 16:21

... electrical assem-blies and connectors for security, and overheating and damage due to leakage Perform inlet and ex-haust inspection as described previously Check standoffs, brackets and struts for looseness, ... frequency of checks (q) Gauges and instruments Verify that gauges and instruments have up-to-date calibration certifications Read and record all indications of gauges, thermometers and other ... valves Inspect and regrind inlet and exhaust valves and valve seats as necessary Refer to manufacturer’s instructions (c) Valve springs and guides Check valve spring length and tension and inspect...

Ngày tải lên: 12/08/2014, 16:21

... spectrometric analysis of the metal par-ticles It is necessary to collect and evaluate data for type and quantity of engine wear-metals Study of this data shows trends of engine wear and expected future ... Management Sys-tem (TAMMS) System Grounding Standards Operation and Maintenance of Internal Combustion Engines Use of Antifreeze Solutions, Antifreeze Extender, and Cleaning Com-pounds in Engine Cooling ... antifreeze) and should be clear (2) Examine the sample to determine the type and quantity of contamination Rust, a chemical combination of iron, water, and air, is frequently found The presence of rubber...

Ngày tải lên: 12/08/2014, 16:21

... engine, use of the starting system and proper accel-eration to operating speed Starting also includes application of the load to the engine c Operation After engine operation starts and the load ... de-fective part often will lead to a series of diffi-culties originating from by-products or effects of the initial failure Therefore, carefully check all of the related and resultant functions of the ... continually varying in value and reversing its direction of flow at regular intervals A cycle is one complete set of positive and negative values of an alternating current The num-ber of cycles occurring...

Ngày tải lên: 12/08/2014, 16:21

... resistance of a combination of series and parallel paths of air leakage Trang 19For combinations of series and parallel paths. The total effective leakage of combinations of series and parallel ... c) be reliable and capable of functioning for a period corresponding to the standard of fire resistance of the elements of structure in a building; d) be simple and economic Some of the advantages ... around the door The total value of the leakage area will therefore depend on the length of the cracks (i.e on the size of the door and on the design and operation of the door) In general, doors...

Ngày tải lên: 28/09/2014, 23:27

... resistance of a combination of series and parallel paths of air leakage Trang 19For combinations of series and parallel paths. The total effective leakage of combinations of series and parallel ... c) be reliable and capable of functioning for a period corresponding to the standard of fire resistance of the elements of structure in a building; d) be simple and economic Some of the advantages ... around the door The total value of the leakage area will therefore depend on the length of the cracks (i.e on the size of the door and on the design and operation of the door) In general, doors...

Ngày tải lên: 28/09/2014, 23:27

... Institution of Building Services Engineers Chief and Assistant Chief Fire Officers Association Consumer Policy Committee of BSI Department of Education and Science Department of Health Department of the ... Health and Safety Executive Home Office Incorporated Association of Architects and Surveyors Institute of Building Control Institution of Fire Engineers Institution of Gas Engineers Institution of ... in buildings, including the history of failures of lifts and of casualties arising from their ill-considered use, and also of existing and earlier technical standards As far as possible this code...

Ngày tải lên: 28/09/2014, 23:28

... charts were added, and the methods for determining loads due to wind and earthquakes were revised The information on design and construction of various types of linings was amplified and incorporated ... lining and the chimney shell was completely re-vised and extended to cover different types and thicknesses of linings and both unventilated and ventilated air spaces be-tween the lining and the ... Division of ASCE took up the recommendation and appointed a task committee that developed and published in 1975 a design guide entitled, “Design and Construction of Steel Chimney Liners.” ASTM established...

Ngày tải lên: 24/10/2014, 15:45

... Commentary presents some of the considerations and assumptions of ACI Committee 313 in developing the provisions of the Standard Practice for Design and Construction of Concrete Silos and Stacking Tubes ... R1.4—Drawings, specifications, and calculations Silos and bunkers are unusual structures, and many engi-neers are unfamiliar with computation of their design loads and with other design and detail requirements ... the design and the preparation of project drawings and project specifications for silos and bunkers be done under the supervision of an engineer with specialized knowledge and experience in design...

Ngày tải lên: 24/10/2014, 15:45

... shell, the size and position of reinforcing steel, details and dimen-sions of the chimney lining, and information on chimney accessories 1.3—Regulations 1.3.1 The design and construction of the chimney ... prediction of the strength of hol-low circular sections in substantial agreement with results of comprehensive tests 5.1.3 The design and detailing of precast chimney shells shall emulate the design of ... protection and grounding 1.4—Reference standards Standards of the American Concrete Institute, the Ameri-can Society of Civil Engineers, and the AmeriAmeri-can Society for Testing and Materials...

Ngày tải lên: 24/10/2014, 15:46

... which silt and clay-size Sands and sand-gravel mixtures with moderate amounts of silt and clay Medium 130 to 170 4.5 to 7.5 29 to 41 3.5 to 4.9Sand and sand-gravel mixtures relatively free of Note: ... traffic islands, and land-scaped planting areas Provisions for these appurtenances should be considered in the design of the jointing system and the layout for construction 1.3—Background Design ... developments, and multifamily housing projects They are used for storing vehicles and goods, and provide maneuvering areas and access for delivery vehicles The design and construction of concrete...

Ngày tải lên: 24/10/2014, 15:47

... 3.3—Sampling and testing concrete 3.4—Details and placement of reinforcement 3.5—Forms 3.6—Concrete placing and finishing 3.7—Concrete protection and curing 3.8—Lining and coating Standard Practice for Design ... 1.3—Scope This Standard covers the design and construction of con-crete silos and stacking tubes for storing granular materials Silos for storing of ensilage have different requirements and are not ... of the construction 2.8.3 Silo stave tests—The results of mechanical tests of silo staves and stave assemblies shall be used as criteria for structural design of stave silos The application of...

Ngày tải lên: 24/10/2014, 16:04

... restraint of radial translation and full restraint of rotation 1.5.2.3 Partially fixed—Full restraint of radial translation and partial restraint of rotation 1.5.2.4 Unrestrained—Limited restraint of ... inert and of adequate thicknessand toughness to resist the usual construction wear and tearand radial pressures from curved tendons Care should betaken to prevent excessive wobble The ability of ... conditions—The effects of radial trans-lation and rotation, or the restraint thereof, at the tops and bottoms of tank walls should be included in the analysis of tank walls The effects of prestressing,...

Ngày tải lên: 24/10/2014, 17:26

... As such, an understanding of these methods leads to clearer understanding of the basis of insulation coordination Similarly, an understanding of the operation and application of metal oxide arresters ... the concepts of power transmission, voltage stress, and testing with various types of voltage Chapter provides a description of the apparatus used in the generation of a.c., d.c., and impulse voltages ... electrical breakdown of gases The breakdown of liquid and solid dielectrics is presented in Chapter of the current edition Chapter of the new text represents an expansion of Chapter of the previous...

Ngày tải lên: 18/04/2014, 12:28

... A_3 of the left hole of the link, and then pick the axis A_12 of the pin at arm 45 For Translation constraint, select the back face of the link, and then pick the front face of the arm Click OK ... of top hole of the arm_asm sub-assembly with the axis A_2 of post – see figure below 40 For Translation constraint, 41 Pick the circular face in the back of arm as shown Pick the front face of ... another Pin connection between link and eccentric 43 As Axis alignment constraint, select the axis A_4 of the right hole of the link, and then pick the axis A_4 of the pin at eccentric For Translation...

Ngày tải lên: 19/01/2014, 05:20