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39 Comments

  • in my system light flactuation is very high plz suggest that how i can rectified this problem

    • I hope that you can find answers in a technical guide about Lighting circuits, Selection, dimensioning and practical recommendations. 2008 edition

  • i would like an article on installing electronic systems,installing vsat and tv-ro also on installing indusrial and central air conditioner. thanks

  • HARMONICS REDUCTION IN INVERTER DRIVES BY USING R-C NETWORK i want information about it

  • Sir/Mam
    i m rushabh chheda
    i need to know about new inventions that i can make fr ma new projexts
    i need ur help very much
    because i wann get selected fr elecrama 2010
    plz reply me fast so that i can make ma new projects as soon as possible

    • hello,
      ELECRAMA is in INDIA / Bombay 20-24 January 2010: a world class forum for convergence of trade and users of the Electrical and Electronics Industry
      can you explain the criteria of selection that are expected? therefore some one can help …

      we wish you a full success!

  • sir, i wanna know wat will happen if the power supply is still on even after the battery is fully recharged. for eg laptop n mobile. will this causw discharging or any harm to battery?

  • Well, it looks like this site and it’s Q/A section are off to a good start.

    Continued success!

    Jeffrey S. Elwood
    Unlimited Electrical Journeyman
    State of Oklahoma, USA

  • i need to get my hands on some software that i can use for electrical installation design and estimation,does anyone know any software thats free!

  • We are a US engineering firm and providing design services in the Gulf countries.  We are well accustomed to NEC rules, but British Standards and local codes. 
    We are trying to determine the code or general practice requirements for equipment and circuits to install RCBO breakers. 
    We find discussion of ELCB breakers – and think the same circuit elements would require RCBO for residual current detection.
    Does BS7671 specifically call out what equipment/circuits require residual current?
    We are designing commercial facilities using MEM panelboards MEMSHIELD 2 MCB Distribution Boards.. 
    Sincerely,
    DJ Hatton, P.E., LEED® AP
    Associate Electrical Engineer, Aviation & Facilities Group
    Burns & McDonnell

    • we suggest that you read IET who publish BS7671:
      IET publishes Wiring Matters Magazine which contains many articles such as RCDs.
      There are two such articles which can be accessed via the following link:

      http://www.theiet.org
      Publishing
      Wiring Regulations
      Wiring Matters Magazine
      Issue 15 Summer 2005 Inspection and testing RCDs
      Issue 19 Summer 2006 Understanding RCDs

  • project reports on ac & dc high voltage test set, primary injection test set, secondary injection test set, impulse generators, variacs, oil test set and other testing instruments.

  • how should we sizing the damping wire in the tube in high voltage substations?is there any standard for it?
    please email me the answer if you know but i try to check this page too.
    jabbarpour@gmail.com

    • sorry, i do not understand the question : what do you mean by “damping” ? and where this wire is located inside the HV/MV substation ? is you expect an answer be much more specific !

  • THANKS FOR YOURINFORMATIONS PLEAS YOU CAN ADD REMOT CONTROLLING SYSTEMS
    ONCE MORE THANKS
    HUSSEIN MOHAMED SHERIF

  • I m calling from BAHRAIN. I need 12volt car battery charger via soler panel & charging in 4 to 6 hrs to use in my home. Because I have UPS sistem making 12v to 220v 50Hz 1.5Kv using in my home.Can u help me how I can get this soler charger for 12v battery? I m electrical engineer and I want to make a bisinous by this way in my area. please halp me. THANKS

  • We are going to set up a biomass power plant of 8MW near Jaipur and looking for an electrical engineer 10 to:
    > 12 yrs. of experience in the same project.
    > It will be very kind of you if you help me to find out such a candidate. Salary no bar for the right
    candidate.

  • Hello,

    I work as one of the engineers planning the maintenance and expansion of the energy transmission system in my country if somebody has some interesting info or articles about transmission lines, transmission systems or related in any way i would appreciate it.

    Somebody told me about this blog and i really think its great.

    Thanks in advance.

  • good morning
    I need the software to use in electrical distribution in the case safety and default medium voltage
    is it possible

  • i m a 7th sem EE student…..i want to make a minor project on any topic any one can help me???

  • wana know about the modern machines introduced, how it operates and wat are the knowledge required when working with these machines from the electrical engineering side. cost of the machine how fast the machine is (in rpm).

  • sir,
    i disigned a circuit for street lights with RTC & RMS voltage regulation in output & it is 100% solid state. i used back to back SCR in power stage & it gives wonderfull results & there is no flicker is observed in MH, hpsv ,florocent,MV& incandicent .only draw back is hormonics it is observed in one premier test house in south asia (CPRI) they give report. it says max 60% current hormonics in single phase & 260% in three phase. can you suggest a circuit it is helpfull.
    thank you
    with warm regards
    gururaj

  • Can someone advise on the following:

    we draw Power from a 33KV Line.The metering is thru a CT and PT and charges are based on KVA Drawn from the system.
    What will be the effect on the total Demand in case of rise in Voltage with total load remaining unchanged.
    Will the demand rise or fall?

  • I NEED TO LEARN MORE ABOUT ELCTRICITY SO FAR I HAVE DONE N3 TO N5.
    THIS IA WHAT I LIKE IN MY ENTIRYER LIFE PLEASE ACCEST ME TO FIND A JOB.
    I NEED TO BE INCLUDET IN THE NEW SA

  • Hi,

    I would like to get guidance on how to improve power factor correction in a system that generates alot of harmonics. Currently, i am running a High Frequency solid state induction welder (11kv,300kw/350KHZ)Tube mill from South Korea and whenever the machine is loaded, power factor deteroriates from approximately 0.98 to 0.70 inductive, for which we are penalized by the State electricity Power supply company.
    The machine main power line is connected in parallel with an automatic power factor correction bank (415V, 50Hz,405Kvar) capacity.

  • I live rural area .there no electricity so i want to establish a solar panal .pls help via circuit diagram.

  • hii this is trishla goyal
    i m a final year student and i have to make a runing project so plz help me out..

  • I am looking for PE in NY to ask for the reference to transfer my PE license from CA to NY by reciprocity. I carry PE registration in CA for more then 10 years and was affiliated with many projects as engineer in records (CA license # E-16656). References are available from my former co workers. Unfortunately I don’t have acquaintances with PE license in NY where I have recently moved. Accordingly to NY PE Board one reference should be from licensed engineer in State of NY. Please e-mail to primordialllc@gmail.com and I will provide with details on that.
    Regards
    Alex

  • We want to keep everything nice and clear and hold back the approaches of weeds, giving our favoured plants room to breathe and grow.
    It’s called Cynthia, generally often known as a painted lady butterfly larva, or caterpillar. With Organic Gardening fertilizers you will be using the fungi and nutrients already found in the soil naturally.

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