Search results for query: *

Thank you @electricpete and @Gr8blu for the explanation.

Thank you very much @electricpete for the detailed information. It is very difficult sometimes to get to the reliable sources. We cannot ignore when they publish results based on some study (real or simulated). I would be grateful if you can share some docs or links on online motor monitoring...

Thanks @Gr8blu for your response. I guess WYE should be DELTA and DELTA should be WYE. @electricpete - thank you for your comments. I was interested in impedance unbalance calculation as there is a relation between impedance unbalance and loss in motor efficiency (exact relation I am looking...

Thank you Che and LittleInch for your comments.

I have recorded current and voltage through data logger (sampling rate 18000 Hz).

Hello, I have recorded 3 phase current and 3 phase voltage waveforms for a small induction motor (3 hp) with Delta connection. Voltages (phase) were measured with respect to a common ground. Load on the motor is about 60-70%. However, calculated power factor (real power/apparent power) is quite...

Thanks Gr8blu, At motor control center we can only measure three conductor currents (line currents), can we calculate impedance for Delta connected motors ? Phase voltage is different than what we are measuring!

Hello everyone, For a delta three phase motor, how to calculate impedance (and impedance unbalance) with three phase current and voltage measurement at motor control center ? Do we have to divide RMS line voltage with RMS current ? How the impedance unbalance related to motor efficiency loss, is...