Transmission and Distribution Construction and Live Line Maintenance, 1993. Proceedings from ESMO-93., Sixth International Conference on

12-17 Sept. 1993

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  • Proceedings of ESMO '93. IEEE 6th International Conference on Transmission and Distribution Construction and Live-Line Maintenance

    Publication Year: 1993
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  • Helicopter installation of fiberoptic groundwire on overhead lines

    Publication Year: 1993, Page(s):67 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    This paper pertains to the innovative use of contractor-provided helicopter-airborne services as a replacement for some of the conventional work methods that would typically have been used on an optical ground wire retrofit program View full abstract»

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  • Helicopter airborne services live line work

    Publication Year: 1993, Page(s):74 - 87
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1148 KB)

    For many years the helicopter has been used as an auxiliary aid in the construction and maintenance of electric lines. Since 1988, helicopters' technical abilities have widened the aeronautical field of activities. EDF-STH (Services et Travaux Heliportes) has thus developed methods and material to perform maintenance work on EDF electric cables, on dead and more particularly an live lines. Linemen... View full abstract»

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  • Computerized design of overhead transmission power lines

    Publication Year: 1993, Page(s):199 - 203
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The conventional design of overhead transmission power lines by manual survey, mapping and design techniques, involve costly and time consuming activities. Massive documentation is accumulated during the preliminary studies of terrain, alternative routes selection, power-line hardware configuration, cost-effectiveness-performance optimization, and more. Additional time consuming and costly paper w... View full abstract»

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  • Live-working techniques on 220 kV long-span towers

    Publication Year: 1993, Page(s):369 - 384
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB)

    This paper outlines integrated live-working techniques, designed by Harbin Power Bureau, to solve the problem of operating on 220 kV long-span towers. It also describes replacement methods for a whole string of suspension insulators and a whole string of tension insulators on on a live line, an oiling method for the release clips (suspension type) of conductors, an examination method for conductor... View full abstract»

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  • Electronic airborne inspection method for overhead transmission power-lines

    Publication Year: 1993, Page(s):89 - 93
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    Overhead transmission power lines are the most cost effective and frequently used carriers for electric energy. Exposure to environment accelerates deterioration, originating small failures, some of them, if not timely detected and repaired, to become serious problems with time. Electric utilities, seriously motivated to drop maintenance costs, under growing demand for reliable energy supply, run ... View full abstract»

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  • Cleaning energized equipment using dry ice pellets

    Publication Year: 1993, Page(s):209 - 223
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    As a result of a two-year study, Puget Power and Alpheus corporation, have demonstrated safe and effective cleaning of energized equipment using dry ice pellets. Dry ice (CO2) pellets are a natural fire extinguisher and exhibit a dielectric strength approximately equal to that of air (30 kV/cm). The pellets disappear instantly on contact, so there is no secondary waste stream to create ... View full abstract»

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  • Selection and use of fall protection and rescue equipment for work on towers

    Publication Year: 1993, Page(s):117 - 126
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    This paper outlines fall protection and rescue alternatives for work on overhead power line towers. It focuses mainly on fall arrest systems which can be used for climbing towers, moving on tower members and working at various locations on and outboard from structures. These techniques may be used for work on station structures as well View full abstract»

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  • Fiber-optic cable installation method

    Publication Year: 1993, Page(s):259 - 271
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A new method for installing fiber optic cables in ducts is currently being used utilizing high speed air flow coupled with a low strain pushing force. Developed in Europe, this method has recently undergone testing and trials in the United States using different sized cables and ducts in varied environments. Erratic duct geometries have little influence over this method, and multiple units may be ... View full abstract»

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  • The research of arc-proofness of set tools for 110-220 kV live line works

    Publication Year: 1993, Page(s):387 - 391
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    This paper presents the results of studies on the arc-proofness of insulating booms of aerial platforms for live line works. The data obtained with 5-20 kA power arcs applied for 1.5-0.1 sec, show acceptable arc-proofness of tested insulating boom samples and full-scale models as well as their ability to withstand nominal voltage or even switching overvoltages after such an arc, if autoreclosing o... View full abstract»

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  • Research and new development in live working in Ukraine

    Publication Year: 1993, Page(s):341 - 358
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    Live working on transmission lines in the Ukraine was started in the 1940s, subsequently ceased in the 1960s and was resumed in 1982. At present all energy enterprises have sets of appliances and personnel trained for live working. The report includes results of live working safety examination, the issue of human protection from the harmful impact of electromagnetic fields, the accident probabilit... View full abstract»

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  • Assessing the significance of annual magnetic field dosages received by live line maintenance personnel

    Publication Year: 1993, Page(s):97 - 104
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    Information about the significance of magnetic field dosages received by live line workers is scarce. This paper describes an attempt to assess the significance of magnetic field dosages received by live line workers during live line operations. The assessment was done by comparing historical dosages received by Eskom's live line workers with insignificant, marginally significant and significant d... View full abstract»

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  • Safety and technique of hot washing

    Publication Year: 1993, Page(s):225 - 239
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    As a maintenance method, hot line washing has been used widely to prevent insulators from pollution flashover in power stations in China. This paper presents the study results of the insulation characteristics of the washing stream and the insulators being washed. The minimum distance between the nozzle tip and the energized part and the effective washing procedure which can ensure the safety of b... View full abstract»

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  • Electrical contact accident with a welding machine

    Publication Year: 1993, Page(s):127 - 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    In 1991, a Bonneville Power Administration (BPA) worker suffered severe injury during an electrical contact accident involving a welding machine. This incident occurred during a complete station outage at a BPA substation. Injuries to the employee consisted of muscle, tissue, and bone damage to one of the worker's shoulders. Tests simulating the accident were performed at BPA's High Voltage Labora... View full abstract»

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  • Switching on by-pass currents during live-line maintenance operations

    Publication Year: 1993, Page(s):273 - 291
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    Technical literature about live working has been mainly devoted to problems related to electrical insulation of the network, especially distances to maintain between linesmen and live parts. This paper concentrates on aspects related to current in electrical installations as it may become necessary, during live maintenance, to separate temporarily these installations from the network. Risk analysi... View full abstract»

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  • Analysis of electrical aging effects of insulating tools for EHV live working

    Publication Year: 1993, Page(s):393 - 398
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB)

    The recent explosion accidents of rigid insulating tools for EHV live workings are introduced and long-term electrical aging experiments of 500 kV insulating tools are carried out. Based on these results, the electrical aging breakdown model of long insulating tools under high electric fields is researched and new concepts of effective insulation length and safe use time of insulating tools for li... View full abstract»

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  • Study on the electrical characteristics of operating rod for live line work

    Publication Year: 1993, Page(s):57 - 64
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    The insulation operating rods are the basic tool for live line work. In order to understand the electrical characteristics of insulation operating rods the tests are made on the influence of connection methods of operating rods on the electrical characteristics and improving the distribution of the electric field to increase the discharge voltage. The complete operating rods test and section rod t... View full abstract»

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  • Bonneville Power Administration's wood pole management program

    Publication Year: 1993, Page(s):185 - 198
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    Bonneville Power Administration (BPA) has been engaged in an active wood pole maintenance program for over 30 years. During this time, the Agency faced many challenges pertaining to wood pole problems, particularly the Western Red Cedar and Douglas-fir pole species. As a result of programs developed and implemented over the years for correcting internal and external decay (rot) situations, BPA has... View full abstract»

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  • Experience of live-line maintenance on 500-1200 kV lines in Russia

    Publication Year: 1993, Page(s):359 - 368
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    The authors evaluate the electrical flashover strength of various insulator strings on 500-1200 kV lines, when replacing defective insulators by the live-line maintenance method, to ensure that the lineman will not be subjected to a flashover. Electrical testing of various insulator strings with defective insulators in different positions were carried out at an outdoor high-voltage facility. This ... View full abstract»

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  • Assessment of historical magnetic field dosages received by Eskom's live line maintenance personnel

    Publication Year: 1993, Page(s):105 - 116
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A number of epidemiological studies have indicated that exposure to magnetic fields in certain work environments has possible detrimental health effects. A limitation of most of these studies, however, is the inaccurate assessment of historical exposure to magnetic fields. This paper describes the preliminary results of a study conducted by Eskom to assess the historical magnetic field dosages rec... View full abstract»

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  • The AC discharge characteristics of composite gaps of tension insulator string in 220 kV line

    Publication Year: 1993, Page(s):251 - 256
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The operation by which linemen enter a strong electric field to change damaged insulators (with o resistance) along a tension insulator string in 220 kV lines has the advantage of simple operation and high efficiency. When linemen enter an electric field along the insulator string, it is in the movement condition. The working positions vary with the position of the damaged insulators. It is very i... View full abstract»

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  • Live line working at distribution voltage in Hungary, in Central Europe

    Publication Year: 1993, Page(s):331 - 339
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    After a ten-year-period of introduction, live line working (LLW) by “hot-stick” method is generally used in the Hungarian 20 kV distribution networks. However, utilization is below the expected level. In the fast changing political and economic life of Central Europe, wider utilization of LLW is expected, and the electrical utilities are preparing to meet customers' demands. New method... View full abstract»

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  • Robotic maintenance of the EDF transmission (63 to 400 kV) network: feasibility study and effects on tower design

    Publication Year: 1993, Page(s):459 - 468
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This article presents the main findings of a study on the advantages of robotics for live line maintenance on high and very high voltage lines in France. The study includes two sections. The first part consists of determining what line and substation maintenance work can be done by remote controlled operation or by robots and how much it would cost. The objective of the second section is to determ... View full abstract»

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  • Field experience on hot sticks exposed to atmospheric pollution for variable winter periods at two distribution substations

    Publication Year: 1993, Page(s):37 - 56
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    This paper deals with one particular aspect of hot sticks used by electrical utilities, exposure to long-term atmospheric pollution. In order to determine the effect of such exposure, high-voltage laboratory tests were performed to evaluate the maximum leakage-current on the hot stick surface. A test program was set up in which the hot sticks were exposed to atmospheric pollution at two Hydro-Queb... View full abstract»

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  • Innovations in live line maintenance for high voltage substations (⩾63 kV) at EDF (Electricite de France)

    Publication Year: 1993, Page(s):169 - 184
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    EDF, as a goal, plans to extend live working while working on maintenance and renovation of HV substations. As a result of the analysis of the stakes and techniques adopted, the document shows the ultimate developments and the prospects of evolution at mid-term View full abstract»

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