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  1. ele.engineer

    10 MW synchronous generator cleaning

    Dear All experts, we have 10 MW 6600 volt synchronous generator, Lube oil was leaking inside the generator from DE bearing which cause a dirty winding as the attached photo. we make megger test (5 KVdc - 1 min )all readings was good and more than 2G ohm. I am wondering ,what is the effect of...
  2. ele.engineer

    Relay contacts connection

    My dears, I'm wondering if it is possible to use two different contacts with two different power sources (24 and 120 VDC) for the same relay ? I'm not sure that this situation is allowed by code.
  3. ele.engineer

    Generator Vibration

    Hello, I first want to say thank you in advance for those who help. I need your advise for the following problem Generator (10 MW and 6600 volt)coupled to gas turbine via gear box. we make re winding for the generator stator winding and after generator operation it have high vibration reading...
  4. ele.engineer

    Dears, If we have a 3phase synchro

    Dears, If we have a 3phase synchronous generator, mechanically connected to gas turbine. and both the generator and the turbine are off, and by fault the circuit breaker become closed , is the the generator shaft will rotate?? Note : for normal operation after starting the turbine the generator...
  5. ele.engineer

    effect of ambient temperature on the motor

    Hello Experts: we have a 3 phase motor working at ambient temperature about 55 deg. Celsius (attached name plate data) what is the effect of the ambient temperature on the motor at the long term...
  6. ele.engineer

    rewinding effects

    hi friends we have a ground fault in the synchronous generator 10 MW so we transfer it to specialized work shop for Re-winding, and after rewinding the generator and make alignment for the generator with the gear box shaft and start the generator we noticed very high vibration in the generator...

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