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  1. Kdanijel

    why is CCVT Cheaper than VT

    Hello, Musabeh. Your answer is partially correct. Difference is in copper for primary and secondary winding as well as magnetic core, oil quantity and insulator diameter. However, Capacitor Voltage Transformer (CVT, or you can call it CCVT if it is at the same time used as Coupling Capacitor)...
  2. Kdanijel

    3V0 (broken delta) Resistor Sizing

    I agree, good and useful discussion. I just want to give some points regarding ferroresonance damping. Use of 100 KOhm resistor proposed by CaptElectron is not a solution, since it would not do much to damp ferroresonance. Practice and some calculations show that decreasing resistance connected...
  3. Kdanijel

    Magnetizing reactance of Instrument transformer

    I will try to answer directly original questions. Basic difference is in their purpose and connection to power system. VT will be connected in parallel, and thus always see voltage of the system (rated and maximum expected, defined by voltage factor – 1,5 or 1,9). Current through VT primary...
  4. Kdanijel

    123 kV Capacitor bank connection

    Hello everybody! I am trying to simulate drainage of the capacitor bank over the primary of a voltage transformer in EMTP. I have a good model of the voltage transformer, but I am not sure which connection of the capacitor bank to use: wye or delta. Please, tell me what is the practise for...
  5. Kdanijel

    Methods for ferroresonance study?

    I am trying to study ferroresonance in CVT. For that I am using an EMTP time-domain simulation. I have read about other methods, like continuation method (based on the bifurcation theory) and methods for direct computation of steady state (Poincare map fixed point method...). They seem to be...

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