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  1. alhafeedh

    motor hunting

    what cause hv motor to hunt during starting?
  2. alhafeedh

    hi i have rotor ground fault motor

    hi i have rotor ground fault motor was tripped on overexcitation found thyristor gate signal block defective when received and spares tested rotor found it was grounded and the motor was having EF detector and vabration and temperature were normal before it fails. is there is possibility that...
  3. alhafeedh

    Synchronoun Motor Fluctuating

    We have HP & MP 15MW injuction synchronous motors the MP with voith coupling start fluctuating during loading 55% of its running load, the motor PF and load current fluctuate and tripped on rotor earth fualt. all excitation circuit tested and found okay. this is the second time any help?
  4. alhafeedh

    Motor starting resistor failure

    thread237-41223 Compressor motor 11.5MW, 240 bar with starting resistor 3 ohms fail (overheat)2 time after vendor RCA replaced with 1 ohm but it fail twice. we do not know reason why? is it because of rotor damper cracked or process problem?

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