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Industry and General Applications, IEEE Transactions on

Issue 4 • Date July 1969

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  • IEEE Transactions on Industry and General Applications

    Publication Year: 1969 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Industry and General Applications Group

    Publication Year: 1969 , Page(s): c2
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    Freely Available from IEEE
  • Table of contents

    Publication Year: 1969 , Page(s): 365
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    Freely Available from IEEE
  • Fourth IGA Group Annual Meeting

    Publication Year: 1969 , Page(s): 366 - 368
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    Freely Available from IEEE
  • A Study of Hazardous Location Practices

    Publication Year: 1969 , Page(s): 369 - 373
    Cited by:  Papers (2)
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    Although several countries that have long been associated with chemical and petroleum industries have developed recommendations for safe electrical practices in what have usually become known as "hazardous locations," internationally active operators are still troubled by the divergence of approach in these recommendations. View full abstract»

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  • Proper Grounding Can Improve Reliability in Low-Voltage Systems

    Publication Year: 1969 , Page(s): 374 - 379
    Cited by:  Papers (6)
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    Safety and reliability of electric distribution systems depend on many factors, including proper grounding. Correct functioning of ground fault relays depends on carefully designed busway housings and conduit connections. Busway housings are recommended as the preferred equipment grounding means because they achieve a low voltage drop value with little danger of electric shock. Eleven specific suggestions are made in an effort to improve the safety and reliability of low-voltage systems. View full abstract»

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  • Speedtronic®---Tomorrow's Analog and Digital Gas Turbine Control System

    Publication Year: 1969 , Page(s): 380 - 388
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    This paper describes General Electric's new solid-state analog and digital gas turbine control, protection, and sequential system. It outlines the functional objectives and elaborates on the design philosophy applied to obtain maximum starting and running reliability, while maintaining a very high degree of fail safeness for the prime mover. It shows in graph and diagrammatic form the basic functions to be performed and schematically how these functions are accomplished. It describes and shows the physical arrangement of the system. The qualification program and operating experience to date are outlined. View full abstract»

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  • Liquid Pipeline Scheduling and Control with an On-Line Multiprogramming Process Computer

    Publication Year: 1969 , Page(s): 389 - 402
    Cited by:  Papers (1)
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    As a part of the nation's vast pipeline industry, Mobil Pipe Line Company provides common carrier transportation for United States oil enterprises. A major portion of the Mobil pipeline system is controlled via microwave radio and supervisory control equipment from the dispatching center in Dallas, Tex. View full abstract»

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  • Computer-Controlled Petroleum Production Systems

    Publication Year: 1969 , Page(s): 403 - 410
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    Use of computer control in the operation of production facilities has expanded rapidly in the past few years. Standard Oil Company of California completed its lastest such project, the automation of platforms Hope and Heidi in the Santa Barbara Channel, in mid 1967. The equipment, which uses an 8K computer control program together with a supervisory control system, permits unattended operation of the remote facilities. This paper discusses the project design details, startup, and operating history, emphasizing both hardware and software aspects of the system. Two unique operating routines, computed well-test sequences, and leak detection to test manifolds, are discussed in detail. Based on the Hope-Heidi experience and background from previous projects of a similar nature, the authors discuss their philosophy of automation. The needs for user and vendor coordination of their system responsibilities and thorough documentation are defined. Emphasis is placed on the advisability of forming a user hardware-software team to handle system engineering and programming "in-house." Particular importance is placed on the specification phase of a process-control project and the need to extract detailed technical data from the vendors in the bidding phase to ensure optimum and economic selection of a system to do a particular job. The discussion of software specifications and the concept of a user team to implement the project should prove useful to the oil producing industry. The concepts discussed are, however, applicable to the implementation of any industry's computer control program. View full abstract»

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  • Ventilation and Purging as an Approach to Electrical Safety

    Publication Year: 1969 , Page(s): 411 - 415
    Cited by:  Papers (1)
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    The usage of flammable gases and liquids in industry and research is rapidly increasing. The problems of applying electrical equipment in these situations have also increased. A portion of this is due to the larger and larger amounts of hydrogen and other substances, where suitable explosion proof equipment is not available, that are being utilized. View full abstract»

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  • Drive Systems for Float Glass Installations

    Publication Year: 1969 , Page(s): 416 - 421
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    Implementation of the float glass process requires continuous control of the glass ribbon from the molten state through the solid state. The areas which present the greatest challenge to the drive manufacturer are the tin bath and the annealing lehr. Here the glass is changing state continuously, requiring the drive systems to provide precise speed, speed ratio, and position control. To provide this control, while maintaining flexibility and versatility for future process changes, solid-state powered dc drives with digital speed control were chosen. The remainder of the process, including the furnace material input, cutting section, and capping conveyor sections, was automated using more conventional drive systems. View full abstract»

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  • Large Motor Starting Problems in the Petroleum Industry

    Publication Year: 1969 , Page(s): 422 - 427
    Cited by:  Papers (1)
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    Rapid growth of pipeline and refinery industries, especially where power systems are "weak" and equipment is fully automated, makes it frequently necessary to start large electric motor drives under adverse conditions. Voltage may sag, and motor torque available for acceleration goes down as voltage squared. Or the motor may have to start a fully loaded pump. Understanding these conditions is essential to finding solutions. View full abstract»

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  • Influence of NEMA T Rerate Program on Integral Horsepower Motors for the Petroleum Industry

    Publication Year: 1969 , Page(s): 428 - 437
    Cited by:  Papers (3)
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    Factual information is presented to show that rerate T-frame motors offer users substantially more value than motors of prior vintage. The gain is not alone a matter of size-weight reduction nor the obvious economic one of avoiding, in industrial ac motors, the inflationary price spiral that generally afflicts American manufactured products. Gains are also evident in: insulation life expectancy, bearing load capability or bearing minimum fatigue life, thermal margin in the bearing lubricant. Through improved computerized design techniques, these gains are achieved without sacrifice in motor efficiency; design level of power factor is slightly lower for T-frame motors, but in-service power factor is generally improved over previous U-frame motors because the T-frame units are designed to a more realistic voltage standard. View full abstract»

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  • A Wide-Range Static Inverter Suitable for AC Induction Motor Drives

    Publication Year: 1969 , Page(s): 438 - 445
    Cited by:  Papers (8)
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    A dc to ac, variable voltage, variable frequency, three-phase, external impulse commutated inverter, rated at 200 kVA, is described that controls the speed of an induction motor that is suitable for traction applications. The inverter is supplied from a variable voltage dc source for the load circuit and a fixed voltage dc source for the commutation circuit. Isolation between the two sources is provided by a high-frequency pulse transformer. The output ac voltage is controlled from 0 to 250 volts; the output frequency is controlled from 4 to 400 Hz. The load is a low-slip, 12 000 r/min induction motor with a continuous rating of 15 hp over a 10:1 speed range, and 60 hp over a 2:1 speed range. The theory of operation and design equations for the inverter power circuit, the design and construction of the motor, and the test results of the inverter-motor combination are presented. View full abstract»

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  • Temperature Rise Considerations for Large Induction Motors

    Publication Year: 1969 , Page(s): 446 - 454
    Cited by:  Papers (3)
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    In 1967 the major electrical machinery manufacturers published new temperature rise limits for standard ratings of large induction motors. These limits have been proposed to the National Electrical Manufacturer's Association (NEMA) for consideration as an industry standard for these machines. This paper outlines the nature of these changes, the reasoning behind them, their effects on machine design, and their effects on motor application by the user. View full abstract»

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  • Designing Reliability into Rubber and Plastic AC Motor Control Equipment

    Publication Year: 1969 , Page(s): 455 - 464
    Cited by:  Papers (1)
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    The reliability of rubber mill control is achieved by the recognition of the operational and environmental needs of the equipment. Mature design, quality of material and workmanship, and ease of maintenance are intrinsic to the nature of a reliable product. This paper defines reliability, discusses the need to achieve it, and demonstrates its measurement and attainment in the process of preparing a product for manufacture. Practical examples are provided to demonstrate how the selection of basic materials, components, enclosures, and circuit arrangements enhance reliability. View full abstract»

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  • Application of Series Capacitors for Voltage Regulation, Fault Current Limitation, and Voltage Flicker Control

    Publication Year: 1969 , Page(s): 465 - 469
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    Recent developments in equipment for protection of series capacitors, damping of resonance, and limitation of fault currents provide a useful means for reducing voltage drop and flicker when induction motors are started or suddenly loaded, and to improve operating conditions of a circuit during normal conditions by decreasing voltage regulation and by reducing short-circuit current during faults on the circuit. These recent developments also include equipment for suppressing ferro-resonance and subsynchronous resonance, and protective equipment to prevent service interruptions because of internal failure in the series capacitor assembly. View full abstract»

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  • Thyristor (SCR) Chopper Control System for Transportation Equipment

    Publication Year: 1969 , Page(s): 470 - 475
    Cited by:  Papers (1)
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    This paper describes the circuit design used for the application of power semiconductors to the control of dc power in a traction motor system. Type SPM designates a series field traction motor SCR control, providing smooth tractive effort control in motoring and in dynamic braking of 500¿1000 hp (continuously rated) rapid transit car drives. Thyristors are switched by a feedback current control system utilizing a fixed-frequency variable pulse width technique. Armature series reactors and line filter requirements are minimized by a multistage scheme. Both armature and field currents are modulated for full speed range control. Third rail system extreme voltage transients are accommodated by system features. Development and tests of sample equipments on the Chicago Transit Authority system are described. This demonstrator became the first semiconductor chopper propulsion equipment to be placed in revenue service in the United States. Service began in September 1967 on the Chicago Transit Authority's Skokie Line. A similar 1000-volt equipment was supplied San Francisco Bay Area Rapid Transit for test track evaluation. View full abstract»

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  • Electric Heat Tracing---State of the Art

    Publication Year: 1969 , Page(s): 476 - 480
    Cited by:  Papers (1)
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    As the petroleum and petrochemical industries have grown in size and diversity of products, their need for more efficient methods of process heating has also grown. A wider span of temperatures plus the need for better and more automatic control of the process has paved the way for the wider use of electricity for process heating. View full abstract»

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  • Zener diode - a protecting device against voltage transients

    Publication Year: 1969 , Page(s): 481 - 488
    Cited by:  Papers (1)
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    This paper begins with a discussion of the different modes of operation of a zener diode and continues with a study of its behavior during voltage transient conditions. A critique of the accepted electrical analogies of the thermal circuit of a zener diode is conducted, and the analysis of the thermal response of a zener diode to a power pulse is made in a highly simplified thermal model. A brief review of basic semiconductor knowledge is included as a frame of reference for the discussion of the causes of zener diode failure. The concept of zener diode failure produced by a high rate of rise of the junction temperature is introduced. View full abstract»

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  • Ozone Generation in Positive Corona Electrostatic Precipitators

    Publication Year: 1969 , Page(s): 489 - 496
    Cited by:  Papers (22)
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    Ozone generation is one of the most important limitations in the design of an efficient electrostatic precipitator for use in air-conditioning systems. View full abstract»

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  • Program of Current Technical Conferences

    Publication Year: 1969 , Page(s): 497 - 500
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    Freely Available from IEEE

Aims & Scope

This Transaction ceased production in 1971. The current retitled publication is IEEE Transactions on Industry Applications.

Full Aims & Scope