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  1. drivechanger

    Earth Monitoring Check On IT System(Neural Non-ground)

    I've never used BENDER but have evaluated it several times for retrofit to existing IT or ungrounded power system.s It requires a single high-impedance connection to earth and a connection to one power phase, through which it pulses a low-energy, high-frequency signal that is able to propogate...
  2. drivechanger

    high induced voltage

    Good discussion....sorry for the delayed post. Amen to the chorus of faithful "hangers-on" to the ancient practice of measuring electrical quantities with a moving coil! As much as I like DMMs, I still prefer a moving-coil meter for checking for potentially-lethal voltage. It is also...
  3. drivechanger

    Running 2-winding motor on BOTH windings

    I have a 2-winding, 2-speed, 4160V induction motor rated for 2100kW/1400kW at 1200/900 RPM, respectively. I need 2500kW at the higher speed. Is it possible to excite the 8-pole windings (900 RPM) at 80 Hz using a medium-voltage inverter, while running the 6-pole windings across-the line? With...
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