3 phase 1 neutral 220V 50Hz power line with transformers 220V-10kV

220

02:16:52

Tried to recreate a 3 phase line with transformers. Can anyone explain why the graphs look weird at the start? 

Трехфазная сеть с нейтралью 220В 50Гц с трансформаторами 220В-10кВ. Кто-нибудь объяснит, почему графики странно себя ведут в начале?

published 6 years ago

hurz

6 years ago

so called inrush current

hurz

6 years ago

still the wrong voltage 220Vpeak is not 220V rms! Check your previews circuit.

elek20

6 years ago

Thanks for replying! I see... also wondering why two of the phases have high currents on start while the third phase has current close to nominal.

elek20

6 years ago

Added amperemeters... It looks like it has high voltages but low currents on start, is it correct? Also I'm puzzled by what the amperemeters show... One phase has like 73-75A fluctuating current, the 2nd one shows around 5A, the 3rd one is around -75A... I'm totally confused.

hurz

6 years ago

the key to understand inrush is ∆u/∆t in other words the change of voltage within a constant time frame. Compare that of all three cases and think about the properties of inductivities!

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