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Recent content by struja

  1. struja

    primary test, liine diff protection with transformer and cabel....

    Hi.... Does enybody has any experiens or any idea of making some kind of primary test for testing the line differential Protection. My question is, is it possible to performe this kind of test (and is it necessary from tehnical point of view) for uderground cabel, 2,5 km long, 35kV, between two...
  2. struja

    Transformer stability test, ct in neutral

    Thank you all for your comments..... I agree that 3ph and 3ph to ground are basicly same thing..... I am just wondering, let say for the attached picture, (is's easier to explane with picture :) ) next few things: 1. Will there be any current flowing through CT3 (maybe some percentage), or this...
  3. struja

    Generator minimum voltage

    Hi... ....scottyUK and waross... many thanks for your help. It is very hepful for me to get such detail comments. At the moment I don't know exactlly all dana that you waross asked from me because generator and everything regarding generator is a scope of another company so I have to search a...
  4. struja

    Generator minimum voltage

    ...thx waross... As it is plan to make stability test of step-up transformer 15/400kV with short ciruit on HV side...please if you can just clarify next: 1. In our case, load will be thre-phase short circuit. Is this ok? 2. While increaseing excitation, means we will increase voltage from 0V up...
  5. struja

    Generator minimum voltage

    Hi.. Rated voltage is 15kV and it is a gas turbine. I am not sure does it have PGM. And one subquestion....to generate some voltage on generator terminals, normaly we start as FSNL condition. But if we have FSNL condition,, do we have nominal voltage at that time (for example 15kV) or we have...
  6. struja

    Generator minimum voltage

    Hi iceworm... The point is to use generator as a source for, for example, to make a stability test of transformer. Generaly, question is, is it possible to get around 415 V and, while have short circuit in HV side of transformer, to get around 1000A from generator, and keep it like this for some...
  7. struja

    Transformer stability test, ct in neutral

    Thank you krisys, this helps me a lot.....
  8. struja

    Transformer stability test, ct in neutral

    Thanks for your replay. Maybe I did not explane what exactly is my concern. If CT in the neutral is simple EF Protection, (not some REF Protection which is comparing current from the neutral of the power transformer, and the lines). And if we make 3ph to ground short ciruit out of zone for TR...
  9. struja

    Transformer stability test, ct in neutral

    Hello.... I have some doubt and would appriciate if somebody could help me. If we would like to do transformer stability test on ynd11 transformer with one CT conected in neutral of the transformer (wye HV side), and inject 400v on LV side of transformer and make 3ph short circuit (to ground) on...
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