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  1. Spgema

    Switching or turning on a 3000 kVA transformer with a soft starter (SS) - to reduce inrush current

    Thank you all, and before I close this matter, like to share a different case of switching on a much larger transformer rated 20 MVA, 22 kV primary voltage with secondary open circuited, as follows:- Afrer demagnetize the 20 MVA transformer,the inrush current was in the range less than 350%...
  2. Spgema

    Switching or turning on a 3000 kVA transformer with a soft starter (SS) - to reduce inrush current

    Thank you all for replies, and insight provided. I do not have the budget for CSD, and also this is LV switching unlike HV and MV with more budget. I will adopt an economical yet difficult method as I am switching on LV Breakers which do not have CSD functionality found in HV and MV. What I...
  3. Spgema

    Switching or turning on a 3000 kVA transformer with a soft starter (SS) - to reduce inrush current

    Hi Participants out there, I have an interesting problem to solve , as you all know that switching on an unloaded txf can see 5 to 10 time its rated current, depending on any remnant magnetism , and point of voltage at instant of turning on. I intend to use soft starter, and ramp the voltage up...
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