jatin333

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  • 2012/10/27 at 2:02 pm in reply to: Variable speed devices y continius chemical process indutries #13249
    jatin333
    Participant

    you can perform this phenomena through VFD 

    2012/10/27 at 1:58 pm in reply to: question on electrical machine #13246
    jatin333
    Participant

    As you defined slip is infinite than your machines speed is almost zero,in induction machine initialy at zero speed torque is zero.

    2012/10/27 at 1:38 pm in reply to: ON off control of AC motor/Pump. #13243
    jatin333
    Participant

    use on-off sequential timer in control for motor starter 

    pref. make- SELEC ,SIEMENS,AEG

    We can set our required time for on and off ,

    your purpose will solve with this

     

    good day

    jatin333

    2011/10/31 at 4:34 pm in reply to: Inrush current in transformer #12613
    jatin333
    Participant

    while transformer is charges theres capacitive effect between turns of winding of x'-mer and it act as a capacitive load when switched on which in turns huge inrush current when switched on.

    2011/10/31 at 4:30 pm in reply to: Isolation Transformer for X-Ray Machine #12612
    jatin333
    Participant

    isoaltion x'mers isolate system from jerks,sudden changes in power DC Contents comming from mains which could mis interpritate x-ray machine

    2011/10/31 at 4:27 pm in reply to: 11 KV SUBSTATION / under ground cable tripped on earth fault #12611
    jatin333
    Participant

    dear,

    nothing to worry as per my opinion protetion system mal functioned,pl. check if protection system electronic PCB based

     

    it's ok

    nothing serious

    2011/07/15 at 2:58 pm in reply to: Convert single phase to three phase #12319
    jatin333
    Participant

    use Variable freq.Drive for converting 1-phase to three phase power

    2011/06/09 at 2:25 pm in reply to: two phase power calculation #12169
    jatin333
    Participant

    thanx Mr.

    Spir Georges GHALI

    2011/06/08 at 1:55 pm in reply to: upgrading power #12161
    jatin333
    Participant

    first you check nominal current rating of your existing cable if ampere rating is below your requirment then lay same size cable parallel to existing cable size will get double and so ampere capacity

    2011/04/25 at 5:29 am in reply to: what is % impedance of transformer? #12012
    jatin333
    Participant

    thanx guys

    2011/04/05 at 4:36 pm in reply to: phase sequance correction circuits #11934
    jatin333
    Participant

    karam_2010 said:

    heloo ,i want to known about phase sequance correction.

    thanks

    procure phase sequence meter which is enable to help you correct phase sequence,which will reduce your work in electrical installation

    2011/03/20 at 5:05 pm in reply to: Which mm armoured cable required #11910
    jatin333
    Participant

    as looking your load 50,70sq. mm cable is not much enough if you are optimising total load than current will be approx. 400amp since your supply voltage is 220v3-ph.

    so main cable you need 300sq. mm aluminium as incomming and then distributo via distribution box to all four machines your 40HP load machines need 70Sq. mm aluminium and  25HP Machine need 35sq.mm Aluminium Cable

    conductor dia. increase b'caouse of your 220v 3-phase power

    2011/03/03 at 5:20 pm in reply to: What is the major cuase of heating in circuit breakers? #11873
    jatin333
    Participant

    harmonics

    2011/03/03 at 5:18 pm in reply to: if a generator is generating 20MW and only 5MW is used where does the other 15MW goes? #11871
    jatin333
    Participant

    if generator is not operating on fullload it consumes basic fuel,and other resources,means you are not lossing 15MW of power but by not optimising generator you loss fuel required to operate 20mw instead of opeate 5mw generator,and  fuel required to operate generator of 5mw in full load is less than fuel required to operate 20mw DG in 5MW load 

    2011/01/20 at 4:12 pm in reply to: Correct generator size #11579
    jatin333
    Participant

    Puka said:

    Supposing I have 3phase power installation, 80A/phase, with 420V/phase as well, what is the calculation for generator to be installed as standby?

    generator capacity always in KVA  Your Connected Load  = 1.73*420*80/1000=58KVA Approx.

    You have to choose DG Capacity =62.5KVA If your power installation operation in full phase,ok

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