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Recent content by rob46

  1. rob46

    Testing of Signal Reference Grid

    Article "Bonding with signal reference grids" EC&M, December 1, 1999 has the following recommendations: "The AC current on any portion of the SRG should not exceed 250mA. AC current exceeding this level will cause voltages that can affect data signals. • Measure the equipment-grounding...
  2. rob46

    equipment grounding for a data rack

    ScottyUK, You are right. Best regards.
  3. rob46

    equipment grounding for a data rack

    The grounding infrastructure shall be in compliance with IEEE Standard 1100, TIA-942 and TIA-607 requirements. See article G.5.1.6 of TIA-942 for the particular equipment bonding requirements.
  4. rob46

    equip compatibility to voltage sag

    What equipment? Please see SEMI F47 "Specification for Semiconductor Processing Equipment Voltage Sag Immunity"
  5. rob46

    Wiring in industrial environment reference book

    You may be interested in "Electrical Systems Analysis and Design for Industrial Plants" by Irwin Lazar (ISBN 0-07-036789-2).
  6. rob46

    NGR, NER Monitor

    Please review the attachment. Best regards.http://files.engineering.com/getfile.aspx?folder=76e9c4e2-dc27-47c4-a361-840c846a8619&file=Generator_ground_fault_relay.pdf
  7. rob46

    Electrical/Comm. cable separation?

    The UTP cable should be installed some distance away from an EMI sources. Cabling pathways standard, EIA-569 table 4.8-5 provides those guidelines (source LANs/cabling-faq that refers to Northern Telecom, doc # IBDN-UM-9105, 1991): Minimum Separation Distance from Power Source...
  8. rob46

    Load calculations

    Please reviewthe following document.You may find it on the web. Electrical Engineering Preliminary Considerations Military Handbook.
  9. rob46

    Feeder protection vs. Differential protection on Distributed Generatio

    You may consider GFA300 ground fault relay between generator neutral and ground.
  10. rob46

    Lightning Shielding Software

    https://ifs.ul.com/lps/lightningprotectionhome.nsf/LookupDocsByID/5949FCF483D3056E8625720A006EF4B8/$FILE/LPS%20Calculation%20%20Aid%2096A%20&%20NFPA%20780%20Revised%206-1-05.xls?OpenElement
  11. rob46

    Transformer Economics

    Please review the attached file..http://files.engineering.com/getfile.aspx?folder=454f18fb-189b-432f-b851-bb197db57fbf&file=Scann001.PDF
  12. rob46

    Neutral....

    Please review the attached file which shows the neutral bonding requirements.http://files.engineering.com/getfile.aspx?folder=a1f0c66d-41ab-483b-bbd3-ca4967784394&file=ATS_Generator_grounding.pdf
  13. rob46

    Grounding 4000A feeder

    Please review http://www.electrician2.com/electa1/ground2.html
  14. rob46

    Reference for Backfeed Transformer In-rush

    Please see the attached article.http://files.engineering.com/getfile.aspx?folder=7ad3b70e-cf68-4292-8d12-748f04a91a71&file=Reverse_feed_transformer.PDF
  15. rob46

    Arc Flash-flooded type U.P.S. Battery strings

    http://www.arcadvisor.com/faq/dc_direct_current_arc.html
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