The developments described in the article were made to improve the reliability and reduce the size of fully metal-enclosed thyristor valves, converter transformers, DC reactors, DC switchgear, and their connecting buses, for use in converter stations. The...
National Technical Information Service (NTIS)
Gas-insulated substation (GIS) reliability is ensured by the fact that the whole unit of equipment is made in the workshop and that it is insensitive to environmental conditions, since it has: a hermetic stainless-steel or protected-steel enclosure, in wh...
The gas-insulated, metal-enclosed switchgear assembly contains two, three or more switchpanels, each having a multipole power breaker (CB.sub.1, CB.sub.2, CB.sub.3, CB.sub.4) as well as isolating and grounding switches per switch pole (CB.sub.1R) and is designed like a ring or in a 11/2 power-breaker circuit. The switch poles of the power breakers are each ...
US Patent & Trademark Office Database
Several failures of multigrade insulation systems have been experienced in metal clad, metal enclosed switchgear, and miniature isolated phase busduct systems. The failure sequence of the series insulation system appeared to originate from a point farthest away from the ground plane and not from the insulation in contact with the ...
Energy Citations Database
This bibliography is divided into sections dealing with insulation coordination, switchgear, shunt reactors, surge arresters, power transformers, current and voltage measurement equipment, station design and operating experience, and testing facilities. (DLC)
The equipment specifications include the following: positive displacement pumps-gear type; vacuum pumps; positive displacement pumps-progressive cavity; tanks; columns and trays; yeast tube; air compressors and associated equipment; chemical feed system for cooling tower; demineralizer; desuperheater; condensate unit; centrifugal pumps; air dryer system; waste water cooling tower; centrifuge, ...
The system configuration, layout, and general philosophy for the MTX magnet power system is described. The vast majority of the magnet power equipment was quite successfully used on the ALCATOR-C experiment at the Massachusetts Institute of Technology. The AC power for the magnet system at MIT was obtained from a 225MVA alternator. The power for the system at LLNL is obtained ...
With the rationalization of specifications, a gas-insulated switchgear (GIS) has been miniaturized in recent years. GIS for AC is designed so that it can resist an AC test voltage and lightning impulse (LI) test voltage. However, a test is not made for the residual DC voltage occurring in an AC GIS spacer when ...
NASA Astrophysics Data System (ADS)
... metal-enclosed equipment or enclosed in a vault or area controlled by a ... Hazard prevention and control, and � Safety ... Controlling Electrical Hazards ...
DTIC Science & Technology
...2009-07-01 false Grounding transformer and switchgear enclosures... § 57.12026 Grounding transformer and switchgear enclosures...and metal buildings enclosing transformers and switchgear shall be...
Code of Federal Regulations, 2010
...2009-07-01 false Grounding transformer and switchgear enclosures... § 56.12026 Grounding transformer and switchgear enclosures...and metal buildings enclosing transformers and switchgear shall be...
... Accession Number : ADD434060. Title : Glass Based Polyester Laminates for the Switchgear Industry,. Corporate Author : ...
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 cables ...
A recent conference on electric ship propulsion held in London highlighted the big strides made in this field in the last few years. What has given the technology a tremendous fillip in recent years is the new generation of ac/ac electrical drives resulting from the development of reliable high-power semiconductor devices and their associated control systems. Diesel-electric ...
A discussion is given of TVA practices in the design of ac auxiliary power distribution systems of large thermal generating plants. Its scope is limited to the primary portions of the system, including the station service transformers which step down the main generator voltage or switchyard voltage, and the switchgear and buses which distribute power from ...
HVDC power transmission has increasingly acquired practical importance and a number of large-scale projects such as the 2000-MW system connecting Britain and France and the 6000-MW system in Italy and Brazil are under way. In Japan, three HVDC installations are in operation, and a stepped-up effort is directed toward the advancement of dc technology with emphasis on application to long-distance ...
The authors discuss how nuclear plants in the United States have taken actions to respond to the NRC Station Blackout Rule, 10CFR50.63. The rule requires that each light water cooled nuclear power plant licensed to operate must be able to withstand for a specified duration and recover from a station blackout. Station blackout is defined as the complete loss of a-c power to the ...
As part of a component fragility program sponsored by the USNRC, BNL has collected existing information on the seismic capacity of switchgear assemblies from major manufacturers. Existing seismic test data for both low and medium voltage switchgear assemb...
The development and testing of the main components of a metal clad SF6-insulated switch gear for dc voltages up to 600 kV are described. The technical requirements of the components were derived from the design of a switchgear arrangement. The switchgear ...
... The switchgear comprises an intermittent duty rheostat, five single-pole single-throw contactors, current limiting fuses, and a controller which ...
Diesel engines and gas turbines are an extremely efficient, and an increasingly cost effective, method of operating power. The choice of installation, the considerations regarding the whole system, the safety implications and the design and engineering developments are discussed at a conference organised by the Institution of Diesel and Gas Turbine Engineers and the Chartered Institution of ...
Defective circuit breakers and switchgear. Overheated motor or generator bearings or brush rigging. Blocked transformer cooling fins. ...
NASA Website
This paper proposes that gas-insulated switchgear must be designed, manufactured, and installed with care and precision. A single particle, burr, or defect in a spacer can lead to failure. Present liability of such switchgear described in this paper is less than desirable and is limited by the nature of tests used to assure the quality of the installed ...
The technology in distribution switchgear has changed significantly in recent years and many new techniques are now available of advantage to both manufacturers and users. The object of this paper is to establish the requirements for distribution switchgear and show how the technology best suited to meeting these objectives can be selected. The paper is ...
This bibliography was prepared by the IEEE Recognition and Planning Subcommittee of the IEEE Switchgear Committee to be used as a reference for switchgear education. The references generally cover the period of mid-1988 through mid-1992. The last complete switchgear bibliography was published in 1989 covering the period through June ...
NASA's Lewis Research Center has systemmatically pushed the development of high voltage solid state remote power controllers (RPC's) and the required semiconductor power switches to provide baseline technology for large, high power distribution systems in the Space Station, All Electric Airplane and other advanced aerospace applications. The technology of solid state ...
The use of insulation material in power switchgear requires consideration of many factors not encountered in any other application. This report describes this application in the context of the particular and sometimes hostile switchgear environment. It supplements for the purpose of switchgear application IEEE Standard No. 1, ``General ...
...2010-07-01 false Grounding circuit enclosures. 57.12025 Section...Underground § 57.12025 Grounding circuit enclosures. All metal enclosing or encasing electrical circuits shall be grounded or provided with...
...2010-07-01 false Grounding circuit enclosures. 56.12025 Section...Electricity § 56.12025 Grounding circuit enclosures. All metal enclosing or encasing electrical circuits shall be grounded or provided with...
...OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12025 Grounding circuit enclosures. All metal enclosing or encasing electrical circuits shall be...
A switchgear that accepts multiple inputs with automatic or manual selection, thereby permitting cyclic observation of more than one resistance thermometer by the resistance recorder with automatic range extension, is described. (D.C.W.)
In replacement of conventional oil-paper bushings, a type of SF6 insulated bushing with polypropylene plastic film dielectricum was developed for outdoor operation of metalclad switchgear. Such bushings have the advantage of the conformity of the insulati...
The investigations to analyze the problems to be expected during the development of metalclad dc switchgears are described. The fundamental problems are: (1) influence of electrode finish and solid contaminants on the electrical withstand; 2) problems of ...
This Aging Management Guideline (AMG) provides recommended methods for effective detection and mitigation of age-related degradation mechanisms in BWR and PWR commercial nuclear power plant electrical switchgear important to license renewal. The latent of...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12026 Grounding transformer and switchgear enclosures. Metal fencing and...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12020 Protection of persons at switchgear. Dry wooden platforms,...
...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12019 Access to stationary electrical equipment or switchgear. Where...
...OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12026 Grounding transformer and switchgear enclosures. Metal fencing and metal buildings enclosing...
...OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12020 Protection of persons at switchgear. Dry wooden platforms, insulating mats, or other...
...OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12019 Access to stationary electrical equipment or switchgear. Where access is necessary, suitable...
May 14, 2010 ... AddiYonal details about the remaining planned non-standard .... switchgear, power distribuYon switchgear and site wide UPS that are ...
The opportunities for applying computer graphics and computer-aided design (CAD/CAM) to switchgear engineering drawings are examined in a case study of one switchgear manufacturer's computer system. This system is of unusual interest because it is particularly strong in two features which are seldom achieved: 1) flexibility in drawing layout and ...
The investigations to analyze the problems to be expected during the development of metalclad dc switchgears are described. The fundamental problems are: (1) influence of electrode finish and solid contaminants on the electrical withstand; 2) problems of dc insulators; (3) interruption of small dc currents against high recovery voltage; and (4) requirements on metalclad dc ...
The article discusses some of the problems encountered and a means for meeting the requirements of IEEE Standard 323-1974 in demonstrating qualification of switch-gear for safety-related applications in nuclear power-generating stations. The switchgear assemblies are subjected to a number of tests (e.g., service conditions, seismic conditions, life, and ...
As part of a component fragility program sponsored by the USNRC, BNL has collected existing information on the seismic capacity of switchgear assemblies from major manufacturers. Existing seismic test data for both low and medium voltage switchgear assemblies have been evaluated and the generic results are presented in this paper. The failure modes are ...
After describing the development of the ratings of switchgear for voltages above 100 kV during the last few years and indicating the current trends, the more important special conditions for which modern switchgear has to be designed are considered. A brief account is given of the present state of the theory of circuit breaking and of the research now ...
