Motor starting

Motor switching inrush current

Motor switching inrush current: The recorded Current Waveform view, as shown in the caption picture above for a few milliseconds, shows normal oscillations with the 3phae system voltage and motor currents of a motor starting with soft starter for a Tyre Industry's Banbury Mixture Motor of rating 400kw, 660v, 3ph, 50hz. The RMS snapshot view, as shown in the picture below lasting about 7seconds, shows that after the initial millisecond starting oscillations, both the system voltage and motor currents drooped back to their rated values, which depicts a normal motor starting characteristics.