Presentation from the SECURE(Sensor-Based Cables for Underground Reliability of Electricity) Infrastructures group.
NSDL National Science Digital Library
A detailed study is presented of the economics of conventional underground transmission lines utilizing oil-paper insulated pipe-type cables. Three cryogenic ac transmission lines, cooled, respectively, by nitrogen, hydrogen, and helium, are compared with conventional cables and overhead lines. The ...
Energy Citations Database
This study evaluated the technical and economic suitability of many of the underground power transmission systems that may be available in the 1990's. The systems considered included cellulose-, polyproplyene-, and gas-insulated cables, oil-filled cables and cryogenic cables for 345 kV to 765 kV ...
The report summarizes the work directed toward the development of a rigid, coaxial, helium-insulated underground ac superconducting cable system. Since no additional work is planned, it presents an overview of the current status of this design concept and...
National Technical Information Service (NTIS)
of high and low voltage power wire and cables at the John F. Kennedy. Space Center. ... use of redundant power systems reduces a disadvantage of underground ... 3.1.3 Metallic raceways such as conduit, cable trays, and wireways are ..... electro-magnetic influence of AC cables on adjacent ...
NASA Website
The demand for electricity in and around built up areas is leading to the adoption of underground transmission at the highest possible voltages. Cables are already in operation at 275 kV ac and projects for 400 kV cables are in hand. It is also probable that within the next decade high voltage dc ...
.................................................................................................................. 16 6.5 Locating faults on underground cables, paralleled cable circuitsIEEE Std C37.114TM-2004 C37.114TM IEEE Guide for Determining Fault Location on AC Transmission-2004 IEEE Guide for Determining ...
E-print Network
Progress in the development of dc superconducting cables suggests these systems will provide an attractive alternate among cable options where long lengths of high-capacity underground transmission lines are required. The general characteristics of dc superconducting cables as well as details of two specific ...
DOE Information Bridge
The makeup of a superconducting three-phase ac cable with coaxial eonductor pairs is described. Thermal insulation can be ensured by means of techniques already used in the construction of containers for liquids with low boiling points. Suitable superconductor materials are niobium and niobium--tin. The most effective electric insulation is ...
This is a collection of papers presented at the 1994 IEEE PES Transmission and Distribution Conference. The topics of the papers include distribution system voltage sags; switchgear; power systems engineering; extruded dielectric distribution cables and accessories; power system harmonics and compensation schemes on transmission lines; extruded dielectric transmission ...
... Accession Number : AD0785157. Title : Underground Cable Systems in Permafrost Soil,. Corporate Author : FOREIGN TECHNOLOGY ...
DTIC Science & Technology
... of locating cable faults is described ... Descriptors : *ELECTRIC CABLES, *UNDERGROUND ... MAINTENANCE, FAULTS, LOCATORS, MECHANICAL ...
... Title : CURRENT RATING OF AIRCRAFT CABLES FOR AC SYSTEMS,. Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC. ...
The purpose and objective of this calculation is to determine the maximum ampacity of the cables in the underground duct bank for ensuring compliance with cable limits.
A brief discussion of CEGB's plans to reinforce London's power supplies with a 640-MW +- 266-kV, 51 mile dc underground cable is presented. The dc cable will tie the 2000-MW Kingsnorth plant with the City's 275- and 132-kV ac outer ring. Details of the route and power station locations ...
This paper has investigated surge propagation and overvoltages on a coaxial cable when a lightning current flows into the metallic sheath based on experiments, EMTP simulations and analytical calculations. At the instance of the current flowing into the sheath, the core voltage becomes the same as the sheath voltage, which is given as a product of the sheath surge impedance ...
NASA Astrophysics Data System (ADS)
Oil-filled cables are providing transmission capacity where undergrounding is called for on the CEGB 275 and 400 kV system; but this well-developed design has disadvantages at these voltages which are likely to become overwhelming if a higher ac transmission voltage becomes necessary as the system expands. The CEGB's Central ...
... PIPES, *ELECTRIC CABLES, *UNDERGROUND STRUCTURES, MECHANICAL ... STRUCTURAL ENGINEERING AND BUILDING TECHNOLOGY. ...
Technology to manufacture chemically crosslinked polyethylene insulated power cables in the ac voltage range of 138 kV to 345 kV having insulation thicknesses approximately equal to that of oil impregnated paper insulated cables is developed. The development of field molded splices and terminations for high voltage stress 138 kV ...
The Cornell ehv Cable Field Testing Project is discussed and design of underground cables for voltages of 500 to 750 kV is briefly mentioned.
High-temperature superconducting (HTS) power cables transmit bulk power with lower loss than conventional cables. Moreover, HTS cables are expected to be constructed as a new underground cable in urban areas at lower cost compared to a high voltage XLPE cable. To put ...
This report covers the continuation of the work to develop technology to manufacture chemically crosslinked polyethylene insulated power cables in the ac voltage range of 138 kV to 345 kV having insulation thicknesses approximately equal to that of oil impregnated paper insulated cables. It also incorporates the development of field ...
In 1958, the first 380-kV overhead lines were energized in France, and the first 380-kV cable sections were connected to the system of the Roselend hydroelectric Plant. It is difficult to state what the next voltage step will be and what adaptations will have to be made. The aim of the present study was to indicate some general ideas concerning the choice of technique and of ...
Low-pressure oil-filled (LPOF) cable systems, while seldom used in this country, have several advantages of interest to engineers. Less oil and insulating paper is required for low-pressure than for the more commonly used high-pressure systems because of the single core. The lower pessure offers safety features in the event of accidental oil loss. LPOF ...
The project was undertaken to examine present practices in underground power transmission, identify environmental impacts associated with those practices, and develop guidelines for reducing impacts where possible. Four basic types of underground transmission cable in commercial use were studied: high pressure oil filled (HPOF) pipe ...
...communications plant in service: Poles and antenna supporting structures, aerial cable, underground cable, buried cable, submarine cable, deep sea cable, intrabuilding network cable, aerial wire and conduit systems. (b) For separations...
Code of Federal Regulations, 2010
Mass-impregnated HVDC (High Voltage Direct Current) cables are just as reliable as high voltage, AC cables. However, there is still a lack of knowledge concerning HVDC cables. In addition , the tests for HVDC cables are less well developed that those for ...
Underground transmission systems installed in the immediate future, manufacturers agree, will continue to employ low pressure, oil-filled, lead covered cable and high-pressure, oil- or gas-filled, pipe-type cables. These systems have proved reliable and versatile over many years and, they say, can be depended upon to meet requirements ...
The energy content per mile of installed underground and overhead power transmission systems was calculated for the following types of systems: self contained oil filled cables; HPOF pipe type cables; extruded dielectric cables; compressed gas insulated systems; overhead lines (ac and dc); and ...
An hvdc transmission system may be more economic than hvac for overhead lines longer than 400 miles or underground or underwater cable longer than 30 miles. Dc line cost is approximately 75% of an ac line having the same total conductor cross section, the same maximum line to ground voltage and approximately the same load carrying ...
It has been determined by the utility industry that the costs of installing underground high voltage transmission cable can be 50 percent of the total circuit in service cost. This study was directed towards underground cable systems in service and those ...
...STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution High-Voltage Longwalls § 75.817 Cable handling and...miners contacting the cables and to protect the high-voltage cables from...
KSC-SPEC-E-0022, Revision B, "AC Power Cable, 5000-Volt, 60-Hertz, .... 60-hertz , alternating current (ac) power cable with ethylene propylene rubber ...
HTS power transmission cables appear to be the replacement and retrofitting of underground cables in urban areas and HTS power transmission cable offers a number of technical and economic merits compared to the normal conductor cable system. A 30 m long, single-phase 22.9 kV class HTS power ...
... Accession Number : ADD433631. Title : Development of 500 KV AC Cable Employing Laminar Insulation of Other Conventional Cellulosic Paper,. ...
Underground pipe-type cables, accounting for 90 percent of the 3000 circuit-miles of cable from 69 to 345 kV, have proved their reliability. Pipe-type cable consists of three single-phase conductors, each individually insulated and shielded, contained within an oil-filled steel pipe. As in overhead lines, the ...
A cable fault locator for sensing faults such as short circuits in power cables. ... patent, an underground cable fault indicator and locator ...
... of aerial, underground, and buried cable systems. ... DEVELOPMENT, SCHOOLS, TRAINING, COMPUTERS, CABLES, TEXAS, ANTENNAS ...
The splicing and termination of underground electrical distribution cable requires that the integrity of cable conductor and insulation be maintained throughout its length. A large number of commercial cable splice and termination kits are available which...
...Poles expense 6411 Aerial cable expense 6421 Underground cable expense 6422 Buried cable expense 6423 Submarine and deep sea cable expense 6424 Intrabuilding network cable expense 6426 Aerial wire expense 6431...
...2010-07-01 false Clamping of trailing cables to equipment. 77.603 Section 77...AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.603 Clamping of trailing cables to equipment. Trailing cables shall...
...2009-07-01 false Clamping of trailing cables to equipment. 77.603 Section 77...AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.603 Clamping of trailing cables to equipment. Trailing cables shall...
The use of cables with extruded insulation and concentric neutral wires has been widely accepted for underground distribution in recent years and substantial continued use of this cable is anticipated. Recent reports of incidences of corrosion of the neutral strands have produced concern about problems which may result. The integrity ...
This is an annotated listing of articles published in 1966 and 1967 on subject of power cables for underground transmission and distribution. It is the first supplement to the Underground Cables Bibliography, which covered published literature from 1960 to 1965. Chapters I through IX pertain to economics, ...
This article describes a study to carry out the sensitivity analysis of peak switching overvoltages in a long cross-bonded underground cable to parameter variations. The sensitivity of the conductor peak overvoltages and the sheath peak overvoltages of an underground cable for a step input on one phase is studied. ...
This bibliography represents an attempt to draw together an annotated listing of the literature on underground transmission and distribution cables for the period 1960 through 1965. No attempt was made to accumulate literature on manufacturing of cables a...
... COAL MINE SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution High-Voltage Longwalls § 75.828 Trailing cable pulling. The trailing cable must be...
...STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution High-Voltage Longwalls § 75.816 Guarding of cables. (a) High-voltage cables must be guarded at the following...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Underground Only § 57.12083 Support of power cables in shafts and boreholes. Power cables in shafts and...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12038 Attachment of trailing cables. Trailing cables shall be attached to...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12014 Handling energized power cables. Power cables energized to potentials...
The measurement of ac losses in superconducting cables by calorimetric means is necessary as a verification of electronic measurements on short high-current models and because the present method of electronic measurement is not applicable to longer cables...
Lightning and fault locating voltage impulses have long been thought to cause extruded underground distribution cables to fail prematurely in service. Unfortunately, the extent of this effect has never been adequately determined. The research conducted under this contract was aimed at finding the influence of simulated lightning impulses and fault locating ...
An analysis of low-voltage shielded trailing cables is performed to develop a method to calculate the differences in operating costs between shielded and nonshielded cables. Two types of shield constructions are considered for the three major underground ...
This report estimates the reliability of fiber optics cables used in underground nuclear tests. Reliability is the probability of receiving signals transmitted from tests. This report uses the numbers of cable and fiber failures to estimate cable and fibe...
... false Energized trailing cables; handling. 77.606 Section 77.606 Mineral Resources MINE SAFETY AND HEALTH...AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.606 Energized trailing cables; handling....
... false Permanent splicing of trailing cables. 77.602 Section 77.602 Mineral...AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.602 Permanent splicing of trailing cables. When permanent splices in...
...2010-07-01 false Protection of trailing cables. 75.606 Section 75.606 Mineral...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.606 Protection of trailing cables. [Statutory Provisions] Trailing...
...2009-07-01 false Protection of trailing cables. 75.606 Section 75.606 Mineral...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.606 Protection of trailing cables. [Statutory Provisions] Trailing...
...2010-07-01 false Clamping of trailing cables to equipment. 75.605 Section 75...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.605 Clamping of trailing cables to equipment. [Statutory...
...2009-07-01 false Clamping of trailing cables to equipment. 75.605 Section 75...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.605 Clamping of trailing cables to equipment. [Statutory...
... false Permanent splicing of trailing cables. 75.604 Section 75.604 Mineral...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.604 Permanent splicing of trailing cables. [Statutory Provisions] When...
... Short circuit protection of trailing cables. 75.601 Section 75.601 Mineral...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.601 Short circuit protection of trailing cables. [Statutory Provisions]...
...account includes the expenses for poles, antenna supporting structures, aerial cable, underground cable, buried cable, submarine cable, deep sea cable, intrabuilding network cable, aerial wire, and conduit systems. (b) The general method...
A design of a 50 kA cable at 8 T for superconducting ohmic heating coils is presented. The cable, which will be cryostable with relatively low ac losses, is composed of 24 basic cables and stainless steel backbone. A non-metallic cryostat for the test of pancake coils of the cable is developed.
Advantages of dc over ac for submarine cable links more than counter balance the economic factors involved by the need for suitable terminal equipment. When the power transmitted exceeds a certain limit, dc is the only practicable solution. The advantages of dc transmission are more strongly emphasized for insulated cables than for ...
Breakthroughs in high-voltage direct-current (HVDC) conversion technology and economics will permit electric utilities to develop a complementary blend of alternating (ac) and direct (dc) current applications to their systems. HVDC is especially suited to long-distance transmission from remote nuclear plants and as an interconnect between networks. A review of the history of ...
Nov 4, 2009 ... "The underground electricity and phone cables were damaged by a bulldozer last week. Now, the electricity is ok but DSL connection has not ...
A survey is presented of the problems to be faced with the underground supply of electric power to large, urban areas and of the contributions that improvements in power cable technology will make to solving these problems. It is concluded that the increa...
The report is devoted to descriptions of investigations pertaining to underground mine trailing cables, their handling, splicing, and the use of couplers.
Flexible tendons, or cable bolts, have been recognized as an effective and efficient support system for underground mines. In the past 10 years, use of cable bolts has increased substantially. Two of the most significant safety hazards associated with cable bolts are the dissipation of stored energy in ...
The following aspects of underground power transmission lines are discussed: their contribution to area beautification; line losses and their causes; the energy conservation potential of large-conductor underground cables; reliability and outage advantages as compared with overhead lines; the history of underground ...
...2010-07-01 2010-07-01 false Breaking trailing cable and power cable connections. 77.605 Section 77.605 Mineral...SURFACE WORK AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.605 Breaking trailing cable and...
...2009-07-01 2009-07-01 false Breaking trailing cable and power cable connections. 77.605 Section 77.605 Mineral...SURFACE WORK AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.605 Breaking trailing cable and...
...2010-07-01 2010-07-01 false Trailing cables or portable cables; temporary splices. 77.601 Section 77...SURFACE WORK AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.601 Trailing cables or portable...
...2009-07-01 2009-07-01 false Trailing cables or portable cables; temporary splices. 77.601 Section 77...SURFACE WORK AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.601 Trailing cables or portable...
...2010-07-01 2010-07-01 false Breaking trailing cable and power cable connections. 75.607 Section 75.607 Mineral...SAFETY STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.607 Breaking trailing cable and...
...2009-07-01 2009-07-01 false Breaking trailing cable and power cable connections. 75.607 Section 75.607 Mineral...SAFETY STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.607 Breaking trailing cable and...
New technologies on EHV XLPE cables have been developed and applied to commercial service. For example, 66/154kV XLPE cables are currently used in new underground transmission network. The number of these cables has rapidly increased and use of these cables has proved very satisfactory. 275kV ...
The proceedings of a Department of Energy-sponsored workshop in the installation of underground power transmission cables are reported. The workshop was held in Pittsburgh, Pennsylvania, October 2--5, 1978. Sixty-two participants, representing equipment m...
Research object is a high power underground cable with direct water-cooling, developed by F and G Carlswerk AG and K and D Lackdrahtfabriken. The objective is to show its suitability for bulk power transmission in densely built-up areas. Additionally, cor...
A test program on forced cooled underground cable systems is described and provides important design information for the utility engineer specifying such systems. Test results as obtained from measurements made at the New York State Energy Research and De...
Advanced high power underground cable designs are compared in the light of the available literature, of reports and information supplied by participating industries (AEG, BICC, CGE, Pirelli, Siemens), spontaneous contributions by EdF, France, BBC and Felt...
...SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.907 Design of trailing cables for medium-voltage circuits. [Statutory...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12013 Splices and repairs of power cables. Permanent splices and repairs...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12008 Insulation and fittings for power wires and cables. Power wires and...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12003 Trailing cable overload protection. Individual overload protection or...
An improved electronic method for measuring ac losses in superconducting cables of lengths from 1m to 10m has been developed and is described. This method compensates for phase shifts in the measuring circuit elements and for imbalance of the difference a...
The results are presented of investigations into the determination of the ac/dc resistance ratios of high and extra high voltage pipe-type cables with conventional and large size segmental conductors in carbon steel, stainless steel and aluminum pipes in ...
Since 1995 Southwire Company and Oak Ridge National Laboratory (ORNL) have jointly designed, built, and tested nine, l-m long, high temperature superconducting (HTS) transmission cable prototypes. This paper summarizes the AC loss measurements of five of ...
The paper considers the choice of conductors and dielectrics for both ac and dc superconducting power transmission cables. The use of Nb3Sn, NbTi and Nb3Ge as the superconductors in ac cables is examined as is the use of pure niobium and specially treated Nb3Sn in three-phase ac ...
The energy content per mile of installed underground and overhead power transmission systems has been calculated for the following types of systems: self-contained oil-filled cables; HPOF pipe-type cables; extruded dielectric cables; compressed-gas-insulated systems; overhead lines (ac and dc) ...
transported to the underground modules via fiber optic cables and light waveguides. The growing enviroumem within the greenhouse is maintained ...
... the option to replace an overhead line with an underground line, installation of a new cable plus a transformer, etc. For ...
Results of tests on underground transmission lines made of superconducting materials are given. The cryogenic enclosures needed for the cables are discussed. (AIP)
Data from field tests and sieve analyses presented in support of an effort to develop guidelines for the installation of underground transmission primary cables. Anodic and cathodic polarization curves and the surface and cable potential gradients from 38 bellholes.
This report describes the characteristics and advantages of the cable downhole system (CDS), a new method of emplacing diagnostic cables for underground testing of nuclear devices. The CDS has been developed by Lawrence Livermore National Laboratory for i...
. Therefore a model validation is of great importance. This paper describes field test setups and measurements for cable model validation, which are prepared using simulations. The proposed field tests should be used of measurement setups that are important for acceptable cable model validation. Transient simulations in EMTD
The work reported is motivated by the mechanical failure of optical fibers in fiber optic cables used in underground testing at the Nevada Test Site. Focus is on basic mechanical tests, simulation of in-situ cable behavior, and proof tests. Preliminary fl...
As one of the measures to bring the construction cost of the underground electric power distribution system, which has recently been carried out in urban areas, a compact type of cable connector which was designed to be separable not like the conventional...
Corrosion data are given on the performance of base and plastic-coated metals intended for use as cable shields for buried telephone cable. The materials investigated on specially prepared specimens were buried for periods up to six years in six different...
Corrosion data is given on the performance of base and plastic coated metals intended for use as cable shields for buried telephone cable. The materials investigated on specially prepared specimens were buried for periods up to six years in six dfferent s...
Corrosion data is given on the performance of base and plastic coated metals intended for use as cable shields for buried telephone cable. The materials investigated on specially prepared specimens were buried for periods up to six years in six different ...
propagation eigenmodes may be defined for each type of cable. These correspond to specific distributions voltages defined by Nc . At a given point, a derivation cable with n wires, a reference basis (Ud , Jd for the modeling of underground powerline access networks. A very important feature of the powerline cables
New dielectric tapes were developed for a superconducting, flexible, ac power cable. Preliminary aging tests were performed. Tests show that the proposed system withstood frequency accelerated aging at a cable stress of 10 MV/m for an equivalent 60 Hz tim...
The report summarizes the work directed toward the development of a rigid, coaxial, helium-insulated underground ac superconducting cable system. Since no additional work is planned, it presents an overview of the current status of this design concept and details of the four principal areas of investigation in the period September 1, ...
This dissertation documents the measurements, analytical modeling, and numerical modeling of electromagnetic transfer functions to quantify the ability of cloud-to-ground lightning strokes (including horizontal arc-channel components) to couple electromagnetic energy onto multiconductor cables in an underground cavity. Measurements were performed at the ...
Forced cooled systems for underground, oil filled, pipe-type electrical transmission cable systems are becoming increasingly common in large urban centers. In systems of this type there exist a number of electrical transmission cables in an oil filled con...
This bibliography represents an attempt to draw together an annotated listing of the literature on underground transmission and distribution cables for the period 1960 through 1965. No attempt was made to accumulate literature on manufacturing of cables and cable accessories except for limited entries for ...
cables may have a higher capital cost and may present a more difficult fault location environment Select Voltage Drop Determine Current Carrying Capacity Determine Cable Impedance Select LocationOPTIMAL UNDERGROUND CABLES SIZING BASED ON WHOLE OF LIFE LOSSES. L. F. Goh* and D A Kearney
Superconducting dipole magnets for accelerators have shown various quench current degradations and unexpected field disturbances even when they were fabricated with the same cables. Such degradations become harmful in terms of the stable operation of accelerators. The reasons for the degradations seem to be caused by AC losses due to coupling currents ...
The measurement of ac losses in superconducting cables by calorimetric means is necessary as a verification of electronic measurements on short high-current models and because the present method of electronic measurement is not applicable to longer cables with simultaneously applied high current and voltage. Consequently, after the ...
The Dover, Delaware, utility found a solution to frequent power outages experienced by a crosslinked polyethylene-insulated underground primary (XLPE) cable in an affluent subdivision when Cable Technologies Laboratories (CTL) identified the problem as an excessive number of electrochemical trees in the cable. ...
If a through fault causes overheating of a superconducting cable, the cable cannot be used until the normal operating temperature is re-established. Since this could take more than a day, the cable must be designed so that the largest through fault expected will not overheat the cable system. A description ...
Two 500-A class prototype high-temperature superconducting cables have been constructed by Southwire Company and tested at Oak Ridge National Laboratory (ORNL). In the first cable, no insulation was used to separate the individual HTS tapes. In the second cable, Kapton tape was used to insulate the HTS tapes between successive layers ...
...2010-07-01 2010-07-01 false Underground high-voltage longwall cables. 75.822...SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution...
...2009-07-01 2009-07-01 false Underground high-voltage longwall cables. 75.822...SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution...
...2009-07-01 2009-07-01 false Underground high-voltage cables. 75.804 Section...SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution § 75.804...
Corrosion of underground metallic structures continues to be a crucial concern within society and the engineering community. Costs associated with corrosion losses are staggering. Indirect costs associated with environmental damage as well as loss of public confidence has in many cases out-stripped direct costs for facility repair and replacement. NACE Group Committee T-10, ...
This study was funded by the Electric Energy Systems Division of the US Department of Energy. It compares costs of several long underground dc cable transmission systems with an aerial dc transmission system, as well as with an underground and an aerial a...
The objective of the program was to study the feasibility of Nb3Ge being used as an AC superconducting power transmission cable material. Specifically, the program was to measure AC losses in available samples of Nb3Ge and find under what conditions the l...
In order to apply widely the superconductivity technology to electric power equipments, the development and evaluation on the AC superconducting cables have been conducted in the Central Research Institute of Electric Power Industry. The superconducting c...
This paper discusses the key selection criteria for power, control, and communications cables when used in Transmission and Distribution facilities. The paper covers underground, substation, industrial, residential and overhead cable applications in Distribution and briefly touches on Transmission applications. ...
Contents: Technical Progress in EHV XLPE Insulated Power Cable; Technique for Large Transmission Capacity of Underground Power Transmission Cables; Technical Progress in Accessories for EHV XLPE Cables; Recent Advancement in Electrical Insulating Material...
...2010-07-01 false Protection of trailing cables. 77.604 Section 77.604 Mineral...AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.604 Protection of trailing cables. Trailing cables shall be adequately...
...2009-07-01 false Protection of trailing cables. 77.604 Section 77.604 Mineral...AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.604 Protection of trailing cables. Trailing cables shall be adequately...
...2010-07-01 2010-07-01 false Approved cables; flame resistance. 75.600-1 Section...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.600-1 Approved cables; flame resistance. Cables shall be...
...2009-07-01 2009-07-01 false Approved cables; flame resistance. 75.600-1 Section...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.600-1 Approved cables; flame resistance. Cables shall be...
HTS cable demonstration project supported by Ministry of Economy, Trade and Industry (METI) and New Energy and Industrial Technology Development Organization (NEDO) has started since FY 2007 in Japan. The target of this project is to operate a 66 kV, 200 MVA HTS cable in the live network of Tokyo Electric Power Company (TEPCO) in order to demonstrate its ...
Power cables are one of the most promising applications for the superconducting coated conductors. In the AC use, only small resistive loss is generated, but the removal of the dissipated heat from the cryostat is inefficient due to the large temperature difference. The aim of this work is to minimize the AC losses in a multilayer ...
High temperature superconducting (HTS) cables with RE-123 coated conductors are expected to lower AC loss compared to that with BSCCO cable. Sumitomo Electric Industries, Ltd. (SEI) has been developing not only BSCCO wires but also RE-123 coated conductors. Recently, SEI has developed a RE-123 coated conductor with a new type of ...
Forced-cooled systems for oil-filled pipe-type cable circuits are considered. In such systems the conduction resistance through the paper insulation of the cables is the limiting thermal resistance. Assuming bilateral symmetry, steady-state conditions, and two-dimensional heat transfer, a FORTRAN IV computer program was written to solve the heat conduction ...
The equipment and method used in a radiographic system for detecting defects in the electrical insulation on underground power transmission cables are described. The BNL x-ray system has been used to check the integrity of 230 kV paper-oil cables which have been in service in Arizona for several years and of a 345 kV paper-oil ...
Tests and analyses were conducted on an experimental 345 kV underground cable system operated in the forced cooled mode. Evaluation of the thermal and hydraulic characteristics of forced cooled High Pressure Oil-Filled (HPOF) systems indicate that under appropriate conditions, up to twice the normal capacity of self-cooled feeders is attainable. ...
Tests and analyses have been conducted on an experimental 345 kV underground cable system operated in the forced cooled mode. Evaluation of the thermal and hydraulic characteristics of forced cooled High Pressure Oil-Filled systems indicate that under appropriate conditions, up to twice the normal capacity of selfcooled feeders is attainable. Information ...
The presence of voids and contaminants in the extruded polyethylene insulation of distribution cable can cause premature cable failure. A recent EPRI investigation sought to use an experimental far-infrared laser (FIRL) to identify impurities in cable insulation manufactured from specially inspected pellets. 15 kV XLPE ...
MONITOR, AC POWER CORD, BNC CABLE BNC � RCA ADAPTER (FOR Z1U) MONITOR BATTERY HARD DRIVE/ COMPUTER CABLES POWER SUPPLY/ADAPTER CABLE PORTABLE HARD DRIVE USB 2.0 CABLE FIREWIRE 800 9-9Pin CABLE FIREWIRE 400 6 CONDENSOR MICS STEREO MIC ADAPTER FLOOR STAND MIC CLIPS FLASH HD ...
This paper describes measured AC losses of NbTi Rutherford type cable when the wide side of the cable is parallel to the field variation. In the case of a Rutherford type cable, the orientation of the cable in the magnetic field is an important factor for the interstrand coupling loss which can ...
The design and use of radiographic equipment for examining underground power transmission cable insulation for defects are described. The portable radiographic equipment can be used to examine cables in factories, in test facilities, or at underground installations. Radiographs of plastic-wound and paper-wound ...
The equipment and method used in a radiographic system for detecting defects in the electrical insulation on underground power transmission cables are described. The BNL x-ray system has been used to check the integrity of 230 kV paper-oil cables which ha...
The paper suggests a mathematical model for the analysis of the performances of the grounding systems of distribution substations in underground systems of distribution substations in underground cable networks with uncoated metal sheathed cables. The model derived has been utilized to evaluate the main grounding ...
Additives can improve the ability of the backfill around underground cables to transfer heat and retain moisture, thus reducing the risk of dangerously high cable temperatures. In long-term field tests, treating backfill with slack wax proved to be the most effective method for both improving heat transfer in silty clays and ...
...false Design of trailing cables for medium-voltage circuits. 75.907 Section...STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits...907 Design of trailing cables for medium-voltage circuits. [Statutory...
...2010-07-01 2010-07-01 false High-voltage trailing cables; splices. 75.810 ...STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution § 75.810 High-voltage trailing cables; splices....
...2009-07-01 2009-07-01 false High-voltage trailing cables; splices. 75.810 ...STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution § 75.810 High-voltage trailing cables; splices....
...2010-07-01 false Installation of high-voltage transmission cables. 75.807 Section...STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution § 75.807 Installation of high-voltage transmission cables. [Statutory...
...2009-07-01 false Installation of high-voltage transmission cables. 75.807 Section...STANDARDS-UNDERGROUND COAL MINES Underground High-Voltage Distribution § 75.807 Installation of high-voltage transmission cables. [Statutory...
...Support of power cables in shafts and boreholes. 57... Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION... METAL AND NONMETAL MINE SAFETY AND HEALTH ...STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Underground...Support of power cables in shafts and boreholes....
Results are presented of investigations on the determination of ac/dc resistance ratios of high and extra high voltage pipe-type cables with large cross-section segmental conductors. The measurements included 115, 345 and 765 kV cables with copper and alu...
Various a.c. methods which can localize faults in portable trailing cables and other cables are considered. They include the Murray Loop, capacitance value measurement, inductance measurement, phase comparison recordings, and standing wave measurement. Judgments regarding suitability rank of the various methods were not attempted; ...
This paper discusses electrical insulation characteristics of high temperature superconducting (HTS) cables for their reliable and rational insulation design. We focused on a severe and practical operational condition of HTS cables, i.e. under commercial ac / lightning impulse superimposed voltage. Experimental results for a HTS ...
Proposed advantages and disadvantages of low-voltage shielded trailing cables are formulated utilizing the literature and industry sources. A partial analysis of these proposed advantages and disadvantages is completed through a review of the literature. Cable costs are assembled from mine operators, cable and splice manufacturers, and ...
This article discusses the importance of corrosion resistance in cable-shielding materials, describes the mechanisms of shielding corrosion that occur in buried telephone cable, and evaluates the results of the six-year REA Horry Cooperative buried telephone cable corrosion test. In this study, both active and static ...
An HTS cable demonstration project has started in 2007. The cable has 66kV/200MVA capacity and 200-300m length. It will be installed and operated at Asahi sub-station in Yokohama in 2011. Bismuth-based HTS wires with twisted superconducting filaments are used for the cable to reduce the AC loss. In 2009, a 30m ...
Results are presented of an investigation to develop a 500 kV ac laminar dielectric power cable and joint having insulation with lower losses than conventional cellulosic paper insulation. Background information is presented on proposed low-loss synthetic and composite synthetic/cellulosic paper insulations and experiments covering a period of 20 years. ...
A windmill drives a drum having a cable coiled thereon, the cable holding a weight. The windmill lifts the weight, and the weight on dropping drives an AC generator. A plurality of drums and weights are mounted on a first common shaft connected with the AC generator, and a plurality of drive pulleys are mounted on ...
In this paper the AC losses requirement for the superconducting coils of the Next European Torus (NET) project are discussed on the basis of the pulsed field scenario and plasma disruptions. The AC losses test results on the prototype 40 kA cable-in-conduit superconductors developed for NET are presented: the performance achieved is ...
The cable in conduit conductors for the various ITER coils are required to function under pulse conditions and fields up to 13 T. A parametric study, restricted to a limited variation of the reference cable lay out, is carried out to clarify the quantitative impact of various cable parameters on the coupling loss and to find realistic ...
The ac loss characteristics of coated conductors are dominated by the magnetic field component normal to their superconductor layer. Multilayer cables as well as monolayer cables consisting of 4 mm-wide coated conductors (named 4 mm cables) and those consisting of 2 mm-wide coated conductors (named 2 mm ...
Accurate taping patterns are essential in paper and plastic lapped underground cables. A newly developed radiographic system makes it possible to examine the structure of cables and splices in a nondestructive manner. This technique appears to be an effective tool for use in both the monitoring of the accuracy of lapping techniques and ...
The paper presents a method for determining in underground distribution cable systems both phase sequence and absolute phase with respect to a standard which is broadcast over the power company`s cellular-telephone network. The method solves the problem of access to the cable center conductor by using a tool developed by the authors ...
This paper reports that a probabilistic evaluation of the ampacity of naturally cooled and forced-cooled 300 KV underground cables has been carried out from the deterministic sensitivity studies of cable ampacities. The results show that probabilistic studies of cable ampacities should be carried out because ...
The report describes a study of the factors that affect medium voltage (661 to 1,000 volts) and high voltage (1,001 to 7,500 volts) trailing cable couplers for use in underground coal mines to connect trailing cables. Improvements in quality, dependabilit...
In order to reduce the construction cost of underground power cables, an extra-high voltage CV cable reduced by half the insulation thickness is being developed. As a developing procedure, interfacial diffusion method in which additives were added to the ...
...2010-07-01 false Energized trailing cables; handling. 77.606 Section 77.606...WORK AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.606 Energized trailing cables; handling. Energized medium- and...
...2009-07-01 2009-07-01 false Trailing cables; short-circuit protection; disconnecting devices...WORK AREAS OF UNDERGROUND COAL MINES Trailing Cables § 77.600 Trailing cables; short-circuit protection; disconnecting...
...2010-07-01 false Temporary splice of trailing cable. 75.603 Section 75.603 Mineral...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.603 Temporary splice of trailing cable. [Statutory Provision] One...
...2009-07-01 false Temporary splice of trailing cable. 75.603 Section 75.603 Mineral...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.603 Temporary splice of trailing cable. [Statutory Provision] One...
...2010-07-01 2010-07-01 false Trailing cable junctions. 75.602 Section 75.602 ...SAFETY STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.602 Trailing cable junctions. [Statutory Provision]...
...2009-07-01 2009-07-01 false Trailing cable junctions. 75.602 Section 75.602 ...SAFETY STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.602 Trailing cable junctions. [Statutory Provision]...
...2010-07-01 2010-07-01 false Trailing cables; flame resistance. 75.600 Section 75...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.600 Trailing cables; flame resistance. [Statutory...
...2009-07-01 2009-07-01 false Trailing cables; flame resistance. 75.600 Section 75...STANDARDS-UNDERGROUND COAL MINES Trailing Cables § 75.600 Trailing cables; flame resistance. [Statutory...
The following appendices to a final research report on a proposed superconducting cable system for ac power transmission are included: technical background of the cryogenic envelope and refrigeration system; method for calculating envelope heat leak; construction procedures and costs for the installation of superconducting cable ...
The present invention is for a compact superconducting power transmission cable operating at distribution level voltages. The superconducting cable is a conductor with a number of tapes assembled into a subconductor. These conductors are then mounted co-planarly in an elongated dielectric to produce a 3-phase cable. The arrangement ...
Transport AC loss in a short length of 9/2 YBCO Roebel cable (nine 2 mm wide strands) is measured. The AC loss data are compared with those in a 5/2 YBCO Roebel cable (five 2 mm wide strands) as well as that in a single strand. All the strands composing the cables and the single strand are ...
This specification covers REA requirements for filled fiber optic cables intended for aerial installation either by attachment to a support strand or by an integrated self-supporting arrangement, for underground application by placement in a duct, or for ...
150 ft of ber-optic cable, a receiver, and associated ampli- fiers and short lengths of ... fiber-optic cable goes underground from the reference an- tenna into the ...
The design, performance testing, and installation of a 220-kV oil-filled cable for installation in underground tunnels at the Tabka Hydroelectric Plant in Syria are described. (LCL)
This report describes the successful development of a computer program for the analysis of the economic, thermal, and rating characteristics of HPOF underground transmission cables with forced cooling. With this program cable engineers can interactively a...
A robust, hand-held instrument for locating underground pipes and cables before excavations by public utility workers was developed. It has direct indiction, no controls to adjust, good resolution, a weatherproof case, a hum detector for power lines, auto...
Electric and electromagnetic effects of transmission cables are described quantitatively, together with an indication of the potential impacts to the public health and safety. The three major types of cable systems commercially available, as well as advan...
Buried telephone cables used in the Rural Electrification Administration (REA) Program have, since the initial installation, incorporated a copper shield because of its high conductivity and excellent corrosion resistance in most underground environments....
This report summarizes an extensive effort made to understand how to effectively use the various diagnostic technologies to establish the condition of medium voltage underground cable circuits. These circuits make up an extensive portion of the electric d...
This research program has the two basic objectives of developing an understanding of the basic mechanisms of dielectric aging and of developing an accelerated laboratory test for predicting the service life of underground power transmission cable insulate...
...COMMISSION (CONTINUED) COMMON CARRIER SERVICES UNIFORM SYSTEM OF ACCOUNTS FOR TELECOMMUNICATIONS COMPANIES Instructions...subsidiary record category shall include the original cost of optical fiber cable and other associated material used in...
...NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Drilling and Rotary Jet Piercing Drilling-Surface Only § 57.7011 Straightening crossed cables. The drill stem shall be...
Although, in principal, experienced technology is used for today's power cables the design is developed continuously. Among insulating materials in use XLPE (crosslinked polyethylen) is increasing for AC networks of various voltage levels. Problems with w...
An overview is presented of some of the areas to be considered in the design and implementation of transmission cables for an Ocean Thermal Energy Conversion (OTEC) power plant. These considerations include choice of ac or dc cable system, voltage level, environmental problems, and selection of insulation. (LCL)
This project was undertaken to design, fabricate and test components of an ac resistive cryogenic cable system. Fiber reinforced plastic was considered to be the most promising pipe material. Cellulose paper was selected for use as the dielectric in the c...
END OF PAGE 2 OF 2, MSG 126. DISCONNECT PGSC. 1. 2. Shared PGSC 15. Disconnect Null Modem Cable (SED46112608302) from PGSC. 3. AC15. Coil, secure Cable ...
In order to clarify the influence of the morphology on electrical tree initiation which appears in a breakdown of cross-linking polyethylene cable (CV cable), the specimen modeled the interface between the semiconductive layer and insulator was applied AC...
Systems Test Work Breakdown Structure CWB51 Manager in the Vehicle Integration .... 5T5-93 AC Bus short to structure. 18. 12. 5T5-97 N51 cable failure ...
As has long been recognized, there are certain advantages to be gained by the use of high voltage dc systems to transport large blocks of power across long distances. Compared to ac power cables of the high-pressure, oil-filled type in widespread use toda...
Residential electric circuits are subjected to surge voltages resulting from load switching in buildings, and from external causes such as lightning. Laboratory test data are presented on high voltage breakdown values for armored cable (type AC cable), no...
The characteristics and economics of superconducting power transmission cables are described. At present Austria is the only European country continuing this research. The USSR has an active program and U.S. efforts are concentrated at the Brookhaven Laboratory which is constructing a 100 m long 138 kV test facility.
