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  • Users: pumpo
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  1. pumpo

    start condition

    If we are starting a centrifigul pump at 50% discharge will that affect the start power conditions?
  2. pumpo

    calculate voltage

    We are using an outdated DA program to record test data. our system calculates start current from the rms measured by a few yokagawa's. the start current is calculated Irms/Vrms X Vrated= Istart to really mess things up upon motor start we are seeing a 36% Vdrop A 500Kw motor being powered By a...
  3. pumpo

    start voltage current relationship

    Start voltage / amprage relation ship was given to me by one of our engineers as Arated/Ameasured = Vrated/Vmeasured so that if you see a V drop at the motor you will also see a decrease in Ampreres. Is this correct????
  4. pumpo

    severe voltage drop

    We are experiencing a severe voltage drop at motor start. The motor 500Kw 3ph 2pole. 2300V rated. Generator, cummins 2Mw set to 460 approx, 4-1 transformer, resistive load bank between gen/trans. we get 36%Vd at motor start. estimated start current is fine it is at or just above estimated value...

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