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  1. Leendabests

    Overheated sign on stator coil

    Hi, I would like to get an advise and opinion regarding to the overheated coil in the induction motor. Recently I have dissemble 1 unit 315 KW Induction motor . We found out that the rotor has marked such as the color of metal at the rotor turned to rainbow color. It is sign of the motor is...
  2. Leendabests

    Switched Reluctance Motor Inductance Test

    Dear All, I have done an inductance and winding resistance test for 75 KW SRM Motor. How could I determine whether the motor is in good condition or not based on the Inductance test result. The test has been done offline. 1) Inductance test at 100 HZ using LCR Meter : A1-A2 @ 100Hz Lmin = 0.93...
  3. Leendabests

    Electric motor insulation drop after cleaning

    Dear Team, I have experienced several problem regarding to the compressor motor. Our client have sent the compressor motors range between 250 HP to 450 HP. We are following standard service step by step. After dissemble the motor, we have done IR test at each phase of coil to check the healthy...
  4. Leendabests

    DC Motor heavy sparking

    Dear friends, Currently i am facing a problem With DC Motor.problem is mentioned below: 1. DC motor was overhauled.Rewound Field Interpole and armature windings.all windings are in good condition with 2000 Mohms value. 2.Polished and skimmed the commutator,,drop tested. found ok. 3.Brush and...
  5. Leendabests

    DC Motor cant turn

    Hi friends, Im facing problem with DC motor at our factory which is cant turn on load or rotate very slow. We have checked all the insulation at Field coil and armature coil and they are all having good IR which is Field coil(2000 Megaohm), Armature coil(2000 MegaOhm). Carbon brush just changed...
  6. Leendabests

    Electric Motor using at escalator overspeed

    Dear All, I have one case where there is an escalator speed up while going down when loads of people on the escalator. The electric motor that has been used is 4 pole. My question, how the motor can ran overrated rpm? The motor still in the good condition. Thank you. Hope to hear from you...
  7. Leendabests

    DC Motor Failed to run on load

    Hello, Im using DC motor to run the conveyor but suddenly the armature shows high current 130 A for 30 V power and the speed cant increase anymore. The motor power stated in the name plate is 93.8 KW, Armature voltage is 453 V and Armature ampere is 225 A. The motor can run free load after...

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