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Electrical joint compound - US Patent 4214121 Description - 0 views

www.patentstorm.us/...description.html cable connectors transmission
shared by Hans De Keulenaer on 10 Dec 09 - Cached
  • Heretofore, joining large aluminum underground power cable to aluminum or copper power cable with compression connectors was not feasible because of premature failure of the connector joint under electrical current loading. Unlike the long andbulky compression connectors used on bare overhead power lines where space is not a premium, underground compression connectors must be short to keep manhole size small and to reduce the time required to insulate the joint with hand-wrapped tape or otherinsulating materials. Overhead line connectors receieve appreciable cooling from air currents whereas commonly used paper or plastic insulation restricts the cooling of underground cable joints. Metal particle-filled grease joint compounds used inoverhead line compression connectors are not used for underground cable for several reasons. First, its use is precluded because of the possiblity of migration of the compound into the paper or along the insulation resulting in voltage puncture of theinsulation from ionization. Secondly, joint compounds of grease do not offer much improvement over no compound because grease will move under pressure and therefore does not constrain relative movement of connector and conductor strands whereashardenable resins such as epoxy do.
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The Future of Solar Cells - Better Generation - 0 views

www.bettergeneration.com/the-future-of-solar-cells.html photovoltaics
shared by Hans De Keulenaer on 20 Sep 09 - Cached
  • However researchers at the National Renewable Energy Laboratory estimate that Indium's availability is likely to constrain the manufacturing of CIGS once production reaches the tens of gigawatts level, unless levels of recovery during extraction are increased.
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Remember The Oil Crisis? Get Ready For The Chinese Dysprosium Crisis | The Truth About ... - 0 views

www.thetruthaboutcars.com/-the-chinese-dysprosium-crisis rare earth emobility
shared by Hans De Keulenaer on 12 Sep 09 - Cached
  • When it comes to dysprosium and terbium, China is in a much better position, called a quasi-monopoly.
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For Wind, Is Bigger Better? « Earth2Tech - 0 views

earth2tech.com/...for-wind-is-bigger-better wind superconductors
shared by Hans De Keulenaer on 20 Feb 09 - Cached
  • American Superconductor said this week that it will work with the Department of Energy’s National Renewable Energy Laboratory and its National Wind Technology Center to look at the economics of building a 10-MW turbine. The Devens, Mass.-based company said it can get a bigger power punch but still keep the size and weight under control by using its high temperature superconductor wire, which it claims is lighter and more efficient than the copper wire traditionally used in wind turbines.
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Aluminum Foil Faith at Out There - 0 views

sharrup.agblogger.org/...aluminum-foil-faith foil
shared by Hans De Keulenaer on 25 Jan 09 - Cached
  • Conducts electricity better than copper, yet is nonmagnetic.
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Aluminum wiring poses risks to home and sale - Los Angeles Times - 0 views

www.latimes.com/...ct25-2009jan25,0,4620793.story
shared by Hans De Keulenaer on 25 Jan 09 - Cached
  • Would you recommend that I upgrade the wire ends? If I do nothing, do you think the aluminum wiring may be a deal breaker?
  • Aluminum wiring has been the cause of numerous house fires. This is because the wire connections at outlets, lights, switches and breakers can become loose, and these slack fittings are prone to overheating. The recommended upgrade for aluminum wire connections is to add copper wire ends, commonly known as pigtails, and to secure these to the aluminum wires with connectors that are specifically designed for this purpose.
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New Haven Independent: Copper-Robber Stopper Approved - 0 views

www.newhavenindependent.org/...copperrobber_st.php theft
shared by Hans De Keulenaer on 24 Jan 09 - Cached
  • The City Plan Commission gave its approval on Wednesday night to a new ordinance amendment on metal recycling in New Haven. The proposal, put forward by Alderwoman Jacqueline James (pictured), would require buyers and sellers of scrap metal to obtain a license from the city and to keep records of all scrap metal transactions.
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The Briefing Room » Superconductive Power Distribution Project Comes of Age - 0 views

blog.tdworld.com/...tribution-project-comes-of-age superconductors distribution cable
shared by Hans De Keulenaer on 23 Jan 09 - Cached
  • On Feb. 6, 2009, Southwire Company and its partners mark the two-and-a-half year anniversary of an urban power distribution project using high-temperature superconductor— known as HTS Triax® Superconducting Cable systems.The installation in Groveport, OH used about 200 meters (600 feet) of Southwire’s HTS Triax Superconducting Cable to distribute electric power to 8,600 homes and businesses through American Electric Power’s Bixby substation. In addition to American Electric Power (AEP), project partners included American Superconductor, the U.S. Department of Energy’s Oak Ridge National Laboratory, and Praxair.
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Electrical Contractor: Branch-Circuit, Feed and Service Calculations, Part XXXIII - 0 views

www.ecmag.com/?fa=article&articleID=9500
shared by Hans De Keulenaer on 18 Jan 09 - Cached
  • Hans De Keulenaer on 18 Jan 09
     
    copper-clad aluminum is treated in the NEC as aluminum, which probably makes sense
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WiTricity - Wireless Electricity - to Debut at CES : Mobile Marketing Watch - The Pulse... - 0 views

www.mobilemarketingwatch.com/ss-electricity-to-debut-at-ces wireless
shared by Hans De Keulenaer on 05 Jan 09 - Cached
  • Companies like Sunnyvale, Calif-based PowerBeam use lasers to generate about 1.5 watts of power to an area around 10 metres. That’s not enough to power a laptop, but it is enough to power digital picture frame, speaker, or maybe even a mobile device. So in case you were worrying about battery life effecting your opportunity to reach your target audience, rejoice that one day mobile users won’t have to think twice about charging up their mobile phone. PowerBeam competitors Witricity and Powercast aren’t transmitting electricity as far as PowerBeam is trying to do. Other companies in the wireless electricity space include Powermat, eCoupled, WiPower and WildCharge. Expect one electrifiying experience at CES this year, as many of these companies are scheduled to show off their wireless electricity 1.0 accomplishments.
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Techical Performance of Traction Machine Design | Engineer Story - 0 views

www.engineerdir.com/nce-of-traction-machine-design motors
shared by Hans De Keulenaer on 05 Jan 09 - Cached
  • An electric motor converts electrical energy into kinetic energy. The reverse task, that of converting kinetic energy into electrical energy, is accomplished by a generator or dynamo. In many cases the two devices differ only in their application and minor construction details, and some applications use a single device to fill both roles. For example, traction motors used on locomotives often perform both tasks if the locomotive is equipped with dynamic brakes.
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Jababeka Business: Piezoelectric motors save power and downsize electronic access control - 0 views

jababekabusiness.blogspot.com/...ric-motors-save-power-and.html motors
shared by Hans De Keulenaer on 05 Jan 09 - Cached
  • Designers looking to save power and size are turning to advanced technologies, and motors are no exception. With piezoelectric technology at the heart, a new type of motor is improving small-scale motion systems in a big way. Electronic access control enhances security, convenience, safety, and flexibility in a wide range of applications from building automation to automobiles. Today, system designers are adding "smallest size" to the requirements list for the electronic actuators at the core of access control systems.
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