Xem 1-20 trên 66 kết quả Lightning
  • This document shall cover traditional lightning protection system installation requirements for the following:This document shall not cover lightning protection system installation requirements for early streamer emission systems or charge dissipation systems. The purpose of this standard is to provide for the practical safeguarding of persons and property from hazards arising from exposure to lightning.

    pdf50p troidem1357 05-08-2009 351 84   Download

  • A lightning rod (AUS) or lightning conductor (UK) is a metal rod or conductor mounted on top of a building and electrically connected to the ground through a wire, to protect the building in the event of lightning. If lightning strikes the building it will preferentially strike the rod, and be conducted harmlessly to ground through the wire, instead of passing through the building, where it could start a fire or cause electrocution. A lightning rod is a single component in a lightning protection system. ...

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  • Furse is a world leader in the design, manufacture, and supply of earthing and lightning protection systems. Over 100 years of experience makes us acknowledged experts in the field. We provide technical support to our customers, ranging from site visits, system design advice, detailed application drawings and training through to on-site supervision, testing and commissioning. Quality approved to BS EN ISO 9001:2000, we are dedicated to providing cost-effective and highly efficient products and service.

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  • Lightning protection systems have changed drastically since Benjamin Franklin first invented lighting rods in 1752. Today's systems must protect modern appliances, electrical systems and building constructions - they have to keep up with tile changing requirements of modern technology. Underwriters Laboratories Inc. (UL) keeps up with these changes.

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  • Lightning phenomena. The planet earth is similar to a huge battery continuously losing electrons to the atmosphere. These electrons could be lost in less than an hour unless the supply is continually replenished. It is widely agreed among physicists and scientists that thunderstorms occurring thousands of times daily around the earth return electrons to earth to maintain normal magnitude of electrons at or near the surface of- the earth.

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  • This research on lightning protection systems for trees was established for the purpose of developing a better understanding of lightning protection systems specifically designed to be fitted to trees. Coming from a background in sylviculture my initial concern was to enable important and intrinsically valuable trees to be protected from damage resulting from lightning strikes. However it quickly became apparent that the protection of nearby structures and buildings that might be liable to collateral damage in the event of strike was of equal significance.

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  • A lightning protection system is a system designed to protect a structure from damage due to lightning strikes by intercepting such strikes and safely passing their extremely high voltage currents to "ground". Most lightning protection systems include a network of lightning rods, metal conductors, and ground electrodes designed to provide a low resistance path to ground for potential strikes.

    pdf5p dee07_bk 24-07-2010 68 5   Download

  • The Handbook for Lightning Strike Survivors By Michele Young-StoneNow an art student in New York City, Becca Burke is a gifted but tortured painter who strives to recapture the intensity of her lightning-strike memories on…

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  • Tham khảo tài liệu 'giáo án điện tử tiểu học: tiếng anh lớp 5- let is learn lightning', tài liệu phổ thông, mầm non - mẫu giáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    ppt0p tengteng7 28-11-2011 50 15   Download

  • Khi bạn muốn chia sẻ một bức ảnh trên facebook, blog hay trang cá nhân từ chiếc máy ảnh yêu quý, nhưng có một vấn đề gặp phải là những bức ảnh này có kích thước và độ phân giải quá lớn sẽ gây khó khăn cho việc hiển thị hoặc thời gian upload. Có rất nhiều phần mềm có thể resize ảnh chuyên nghiệp nhưng thời gian là vấn đề khá lớn.

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  • Franklin performed his initial experiments on electricity in collaboration with friends and neighbors, including Thomas Hopkinson, a lawyer and judge; Ebenezer Kinnersley, a clergyman and teacher; and Philip Syng Jr, a master silversmith. Franklin described the experiments and their results in five formal Letters to Peter Collinson, a fellow of the Royal Society of London, during the years from 1747 to 1750. Collinson in turn communicated those Letters to the Society and published them in April 1751....

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Ball Lightning–Aerosol Electrochemical Power Source or A Cloud of Batteries

    pdf12p sting10 07-03-2012 21 4   Download

  • ADC’s new P3M protector modules combine lightning protection and DS3 signal monitoring capabilities in a single, compact chassis. The modules can be placed in an outside plant cabinet or at a handoff site in a central office and provide primary protection for network equipment.

    pdf2p maiphuong 14-08-2009 88 2   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : A case of a speech impediment following a near lightning strike

    pdf2p sting03 06-02-2012 15 2   Download

  • Lightning McQueen trong hình dáng chiếc túi xinh xinh, dễ thương và cực kỳ đơn giản nhé!

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  • BECCAOn a sunny day in Chapel Hill, North Carolina, eight-year-old Becca Burke was struck by lightning. No one believed her—not her philandering father or her drunk, love-sick mother—not even when her watch kept losing time…

    pdf5p konbetocroi 12-12-2012 14 1   Download

  • VAN CHỐNG SÉT Tiêu chuẩn Việt nam Van chống sét Lightning Arresters TCVN 5717 - 1993 Tiêu chuẩn này áp dụng cho van chống sét loại có khe hở phóng điện , dùng để bảo vệ quá điện áp khí quyển cho thiết bị điện đường dây và trạm có các cấp điện áp từ 3 đến 35 kV , tần số 50Hz . Tiêu chuẩn này không áp dụng cho các loại van chống sét sử dụng trong môi trường đặc biệt ăn mòn kim loại và vật liệu cách điện ở những nơi có rung động mạnh hoặc có tác...

    pdf7p caott2 19-05-2011 627 153   Download

  • WHO THIS BOOK IS FOR Be aware that this is not a beginner book. It is an intermediate-level book that assumes you are familiar with linear algebra (matrices, vectors, and quaternions), you have a strong C/C++ programming background, you have at least touched base with OpenGL or OpenGL ES, and you basically know how computer graphics work in general. If you have this necessary knowledge, and want to make lightning-fast progress in game and graphics programming, then you have found the right publication.

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  • Choose the word which has different stress pattern: A primitive B particular C continuous D connected A intensify B summary C philosophers D instruction A pressure B medical C immortal D lightning A language B lyrical C evidence D disadvantage A sedentary B available C additional D majority Choose the best option:_____ is a time that is supported to be free from worries. A. Child B. Childlike C. Childish D. Childhood

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  • If you're reading this because you think you might be one, my advice is: close this book right now. Believe whatever lie your mom or dad told you about your birth, and try to lead a normal life. Being a half-blood is dangerous. It's scary. Most of the time, it gets you killed in painful, nasty ways. If you're a normal kid, reading this because you think it's fiction, great. Read on. I envy you for being able to believe that none of this ever happened. But if you recognize yourself in these pages—if you feel something stirring inside—stop reading immediately.

    pdf206p thaotinhte_96 12-01-2013 50 21   Download


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