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الموضوع: Standred Earth System

  1. #1
    Consultant Engineer الصورة الرمزية أسامة حسن البلخي
    تاريخ التسجيل
    Sep 2014
    الدولة
    مكة المكرمة
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    1,401

    Standred Earth System

    Standred Earth System
    The International Electrotechnical Commission (IEC) is a bodyresponsible for implementing international standards. Its technicalcommittees are comprised of representatives from variousmember national standards, where each country is entitled to onevote during the process of creation and issuing the standard. Thestandards generally have an IEC prefix to their number (CEI forFrench versions). IEC standards are produced in English and Frenchlanguages. For most countries the adoption of these standards isvoluntary, and often selected ******* of the standard is absorbedand introduced as improvements to that country’s own standard.Also, within Europe, there exists the European Committeefor Electrotechnical Standardisation (CENELEC). The membercountries currently include Austria, Belgium, Cyprus, the CzechRepublic, Denmark, Estonia, Finland, France, Greece, Hungary,Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, theNetherlands, Norway, Poland, Romania, Slovakia, Slovenia, Spain,Sweden, Switzerland and the United Kingdom. IEC and CENELECgenerally work in parallel, and CENELEC members vote to adoptnew IEC standards as CENELEC standards. The committees ofCENELEC may choose to make some alterations to the IEC version.Additionally, CENELEC produce their own standards to whichIEC have no counterpart. CENELEC ********s are produced inEnglish, French and German and an approved CENELEC standardwill have an EN prefix (or NE in the French language versions).The important fact with CENELEC standards is that by rule themember countries are bound to adopt all CENELEC standards asnational standards. In the process of adopting these standards,minimum changes are permitted. In-country clauses (exceptionsor changes) can only be made under very strict circumstances.When such standards are adopted at the national level, anyconflicting national standard must be withdrawn (an overlapperiod is permitted).For the EN IEC 62305 series of lightning protection standards,each member country has introduced these at a national level byNovember 2006 and has withdrawn any conflicting standardsby February 2009.At each level (International, European, National) a differentnaming prefix convention is used For example:• IEC 62305-1 (IEC version)• EN 62305-1 (CENELEC adopted copy of the above)• BS EN 62305-1 (British National Standard adoption ofthe above)This ******** focuses upon the IEC/EN standards and, for aspecific design, the applicable national standards should bereferred to in order to ascertain if differences exist.Reference in this ******** is given to standards being eitherdesign or component standards. Design standards are those usedby the lightning protection designer or installer to determinethe type and placement of the lightning protection system.Component standards are those used by the manufacturer ofthe lightning protection hardware (components) to ensure thehardware is of adequate specification and quality.1.1. IEC 62305 seriesThe IEC 62305 series of standards are primarily design standards,giving the user a tool kit of rules and options to provide lightningprotection for a structure. The standards cover structure protectionand equipment protection with regard to the effects of direct andindirect lightning flashes.While the IEC 62305 series of standards introduces many newaspects, it is predominantly a European harmonization of thevarious supporting country lightning protection standards.“IEC 62305 Protection Against Lightning” is comprised of 4 parts(********s):• IEC 62305-1 Part 1: General Principles• IEC 62305-2 Part 2: Risk Management• IEC 62305-3 Part 3: Physical Damage to Structure andLife Hazard• IEC 62305-4 Part 4: Electrical and Electronic Systemswithin Structures• IEC 62305-5 Part 5: Services (This part was not introduced)IEC 62305 series of standards expands, updates and replaces theearlier IEC 1024-1-1 (1993) & IEC 1024-1-2 (1998), IEC 61622(1995 & 1996), IEC 61312-1 (1995), IEC 61312-2 (1998), IEC61312-3 (2000) & IEC 61312-4 (1998).Since the IEC 62305 series was parallel approved as a CENELECstandard, the EN version is identical to the IEC version. As aCENELEC standard this means that the EN 62305 standards havereplaced the various country source standards, such as BS 6651,NFC 17-100 and DIN VDE 0185.1.2. EN 50164 seriesWithin Europe, the CENELEC has released the EN 50164 seriesof standards. The EN 50164 series are component standards towhich the manufacturers and suppliers of lightning protectioncomponents should test their products to verify design and quality.The EN 50164 series currently comprises of:• EN 50164-1 Lightning protection components (LPC) –Part 1: Requirements for connection components• EN 50164-2 Lightning protection components (LPC) –Part 2: Requirements for conductors and earth electrodes• EN 50164-3 Lightning protection components (LPC) –Part 3: Requirements for isolating spark gaps• EN 50164-4: Lightning Protection Components (LPC) –Part 4: Requirements for conductor fasteners7www.erico.pentair.com 1. IEC and EN Standards (continued)• EN 50164-5: Lightning Protection Components (LPC) –Part 5: Requirements for earth electrode inspection housingsand earth electrode seals• EN 50164-6: Lightning Protection Components (LPC) –Part 6: Requirements for lightning strike counters• EN 50164-7: Lightning Protection Components (LPC) –Part 7: Requirements for earthing enhancing compoundsThis series of standards is currently being published at IEC levelunder the name IEC 62561 series.The EN 50164 series of standards are generally componentstandards to which the supplier of the equipment should havetested their products. Pentair has completed an extensiveregime of testing to these standards, and details are availableupon request.EN 50164-1 scope covers connection components such asconnectors, bonding and bridging components and expansionpieces as well as test joints. The intent of this standard is that anymechanical connection between the tip of the air-terminal and thebottom of the earth electrode should be tested. This covers themore obvious down-conductor connectors (cross-over connectors,tape clamps, etc) and down-conductor test links, to the lessobvious air-terminal (rod) to air-terminal base connection anddown-conductor to earth electrode connection.EN 50164-1 testing classifies the products according to theircapability to withstand lightning current by an electrical test:• Class H – Heavy Duty (tested with 100 kA 10/350 µs), or• Class N – Normal duty (tested with 50 kA 10/350 µs)Standard Title TypeIEC 62305-1(EN 62305-1) Protection against lightning – Part 1: General principles Design StandardIEC 62305-2(EN 62305-2) Protection against lightning – Part 2: Risk Management Design StandardIEC 62305-3(EN 62305-3) Protection against lightning – Part 3: Physical Damage to Structure and Life Hazard Design StandardIEC 62305-4(EN 62305-4) Protection against lightning – Part 4: Electrical and Electronic Systems within Structures Design StandardEN 50164-1 Lightning protection components (LPC) – Part 1: Requirements for connection components Component StandardEN 50164-2 Lightning protection components (LPC) – Part 2: Requirements for conductors and earth electrodes Component StandardEN 50164-3 Lightning protection components (LPC) – Part 3: Requirements for isolating spark gaps Component StandardEN 50164-4 Lightning protection components (LPC) – Part 4: Requirements for conductor fasteners Component StandardEN 50164-5 Lightning protection components (LPC) – Part 5: Requirements for earth electrode inspectionhousings and earth electrode seals Component StandardEN 50164-6 Lightning protection components (LPC) – Part 6: Requirements for lightning strike counters Component StandardEN 50164-7 Lightning protection components (LPC) – Part 7: Requirements for earthing enhancing compounds Component StandardAnd according to its installation location by environmental test:• Above ground (salt mist & sulphurous atmosphere tests), and• Buried in ground (chloride and sulphate solution test)EN 50164-2 scope covers ****llic conductors, down-conductors(other than “natural” conductors such as building reinforcingsteel) and earth electrodes. It should be noted that the ****llicconductor requirement also covers the air-terminals (rods). Thetests include measurements to confirm compliance with minimumsize requirements, resistivity and environmental testing. Earthelectrodes are subjected to tests including bend tests, adhesiontests, and environmental tests. Coupled earth electrodes andthe coupling device are also subjected to hammer compression(impact testing) and the requirements of IEC 62305-1.EN 50164-3 scope covers isolating spark gaps used in lightningprotection systems, such as those used to bond ****l work toa lightning protection system where direct connection is notpermissible for functional reasons.EN 50164-4 scope covers tests procedures and requirements for****llic and non-****llic fasteners used on most (but not all)wall and roof materials to secure air termination systems anddownconductors. Fasteners used in explosive atmospheres should besubjected to additional requirements not defined in this standard.EN 50164-5 scope covers requirements and tests for earth pitsand earth seals made of steel, plastic, concrete among others.Load-bearing capacity tests and seal quality tests are the key testscovered in the standard.
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