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  1. vtakev

    HV Substation Design

    You can order a copy on paper from www.abb.com - just search for "ABB switchgear manual". Price is about 50 EUR
  2. vtakev

    Utilization Factor

    Hi Thorangle Usually the designer gives the UF in the project papers and its applied when has to be designe dthe distribution switchgear. In fact UF depends on the type of the load and installation (i.e. there is no target). It could vary too much. By using the UF you calculate the rated...
  3. vtakev

    Power Transformer Capacity

    Rbulsara is right - at least give us a hint:) - rated primary and secondary voltage, type (oil, dry) and appr. dimensions.
  4. vtakev

    HV Substation Design

    It's a difficult task, believe me. Try to find ABB Switchgear manual, 10th edition - there is an excellent description of the basic idea.
  5. vtakev

    Functions of Regulators and Capacitor Banks

    Check where are connected exactly the capacitor banks. If there are asynchr. motors with drives and/or DC motors with ddrives, some bad choise of capacitors, missing of reactors etc. can a reason for appearing of high level harmonics (5, 7 and 11 usually) and capacitors "reinforce" them.
  6. vtakev

    electrical symbols

    Hi Jonnza Try following sites: http://www.mvps.org/visio/3rdparty.htm - good site http://www.visiocafe.com/ - something could appear Anyway, it's hard to find good stencils. If you have couple of free days try to create by yourself.
  7. vtakev

    Why Protection didnÆt TRIP

    I suppose there was an arc between busbars in LV switchgear. Any short-circuit fault or overload would trip the CBs. If the inside air is not clean (even a close standing motorway could cause this) arc could appear and it will destroy the switchgear before any action from main CB.
  8. vtakev

    IEC 61363-1

    Ijl is right - go to www.abb.com, then search for DOCWin. ABB SACE will send it for free. I'm using it and it works.
  9. vtakev

    Power factor correcting

    [thumbsup2] Hi Sparkodean Everything said from other guys is correct. Just pay attention to high level harmonics. If you have frequency drives or softstarters for your motors they could create 5, 7 and 11 harmonics. In this case you will need reactors on the capacitor banks or harmonic filter...
  10. vtakev

    Elictrical panel boards fabrication

    Hi Suntop! Leave destructive answers:)) and take a look at my idea. I'm working in ABB for already 6 years and main activities are LV switchgears. To built your own switchgear system (type tested structure) will cost a lot of money, mainly for testing and preliminary desiging. I propose you to...
  11. vtakev

    converting visio fills into autocad files

    Sorry for the answer, but there is no way to do this. If you wnat use *.wmf files. For sure, any save of Visio file in CAD format will cause loss of formats. What I do - I save the *.vsd file in *.pdf format, than using Adobe Acrobat I save it like *.htm or *.xml.
  12. vtakev

    Short circuit current abbreviations (ICC)

    Hi! Use the fllowing definitions: Short - circuit is the accidental or deliberate connection across a comparatively low resistance or impedance between two or more points of a circuit which usually have deiffering voltage. Therefore short circuit current Icc 0s the current in an electrical...

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