ieee standard81 2 (noi dat)
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ieee standard81 2 (noi dat)
IEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) er System Instrumentationand Measurements Committee of theIEEE Power Engineering SocietyApproved December 5. 1991IEEE Standards BoardAbstract: Practical instrumentation methods are presented for measuring the ac characteristics of large, extended or interconnected grounding systems. Measurements of ieee standard81 2 (noi dat) impedance to remote earth, step and touch potentials, and current distributions are covered for grounding systems ranging in complexity from small griieee standard81 2 (noi dat)
ds (less than 900 m2), with only a few connected overhead or direct burial bare concentric (2) neutrals, to large grids (greater than 20 000 m2). witfIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) dresses measurement safety; earth-return mutual errors; low-current measurements, power-system staged faults; communication and control cable transfer impedance; current distribution (current splits) in the grounding system: step, touch, mesh, and profile measurements: the foot-equivalent electrode ieee standard81 2 (noi dat) earth resistance: and instrumentation characteristics and limitations.Keywords: Grounding systems, impedance, safetyThe Institute of Electrical and Elieee standard81 2 (noi dat)
ectronics Engineers. Inc.345 East 47th Street. New York. NY 10017-2394. USACopyright © 1992 by theThe Institute of Electrical and Electronics EngineerIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) ny form. In an electronic retrieval system or other wise. without the prior written permission of the publisher.AutHíiỉAứ lt«flMd LM Imtod 10 MULTIMEDIA UNIVERSITY Do.Nùidod on AujuM 12 2059 X 05 04 t«n IEEE Xptorâ RâUrtcttoní K0/IEEE Standards documents arc developed within the Technical Committees ieee standard81 2 (noi dat) of the IEEE Societies and the Standards Coordinating Committees of the IEEE Standaids Board Members of the committees serve voluntarily and without cieee standard81 2 (noi dat)
ompensation They aie not necessarily members of the Institute The standards developed within IEEE represent a consensus of the broad expertise on the IEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) tandard.Use of an IEEE Standard is wholly voluntary. The existence of an IEEE Standard does not imply that there are no other ways to produce, test, measure, purchase, market, or provide other goods and services related to the scope of the IEEE Standard. Furthermore, the viewpoint expressed at the t ieee standard81 2 (noi dat) ime a standard is approved and issued is subject to change brought about through developments iu the state of the art and comments received from usersieee standard81 2 (noi dat)
of the standard. Every IEEE Standard IS subjected to review at least every five years for revision or reaffirmation. When a document IS more than fivIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) nt state of the art Users are cautioned to check to determine that they have the latest edition of any IEEE Standard.Comments for revision of IEEE Standards are welcome from any interested party, regardless of membership affiliation with IEEE Suggestionsfor changes in documents should be in the form ieee standard81 2 (noi dat) of a proposed change of text, together with appropriate supporting comments.be addressedInterpretations: Occasionally questions may arise regarding tieee standard81 2 (noi dat)
he meaning of portions of standards as they relate to specific applications. When the need for interpretations is brought to the attention of IEEE, thIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) ant to ensure that any interpretation has also received the concurrence of a balance of interests. For this reason IEEE and the members of its technical committees are not able to provide an instant response to interpretation requests except in those cases where the matter has previously received fo ieee standard81 2 (noi dat) rmal considerationComments on standards and requests for interpretations should be addressed to:Secretary. IEEE Standards Board445 Hoes LanePO Box 133ieee standard81 2 (noi dat)
1Piscataway. NJ 08855-1331USAIEEE Standards documents are adopted by the Institute of Electrical and Electronics Engineers without regard to whether tIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) ssume any obligation whatever to parties adopting the standards documents.Aurortjod 1'ttHHd M ImilM to MULTIMEDIA UNIVERSITY OtaNMđOd on12 2009 at 05 04 »cm IEEE XpU<0 RourtctbnsForeword(This foreword is not a pari of IFF.F. Std 81.2 1991. IFFF. Guide for Me.isureirieiit of Impedance anti Safety Cha ieee standard81 2 (noi dat) racteristics of I urge. Extended oc Interconnected Grounding Systems.)During the late 1970's. ill an effort to increase its usefulness. Illis guide waieee standard81 2 (noi dat)
s divided into two parts. The first pail is entitled IEEE Sid 81-1983. IEEE Guide for Measuring Earth Resistivity. Ground Impedance, and Earth SurfaceIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) hat do not encounter unusual difficulties such as may be found with extensive grounding systems, abnormally high stray ac or de currents, etc. IEEE Sid 81 (Pari I) has been extensively revised and updated. Part 1 was approved in 1983 and reaffirmed in 1991. Illis part of the guide (Part II) is entit ieee standard81 2 (noi dat) led IEEE Sfd 81.2 1991. IEEE Guide for Measurement of Impedance and Safety Characteristics of Large. Extended or Interconnected Grounding Systems. Thiieee standard81 2 (noi dat)
s new pail covers measurement of very low values of ground impedance (less than 1 Q). The extensive use of specialized instrumentation, measuring techIEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPowe ieee standard81 2 (noi dat) Interconnected Grounding Systems Working Group of the RLC Measurements Subcommittee of the Power Systems Instr umentation and Measurements Committee of the IEEE Power Engineering Society.At the time that this standard was completed, the working group had the following membership ieee standard81 2 (noi dat) IEEE std 81.2-1991IEEE Guide for Measurement of Impedance and Safety Characteristics of Large, Extended or Interconnected Grounding SystemsSponsorPoweGọi ngay
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