About George V. Noller Expertise I can answer questions about operating/dispatching an electric power grid. This can include the generation, transmission and distribution of power as well as the facilities involved. I will answer questions regarding system disturbances or blackouts. I can also answer questions about power flow concepts and system protection.
I cannot answer questions about equipment at voltages below 4 kV nor can I answer questions about customer wiring.
Experience I am currently a transmission system dispatcher and assistant trainer for a major California utility. I have been in system operations for 25 years with 20 years as a system dispatcher. I have experience in transmission dispatching, generation dispatching and intertie scheduling.
Organizations I am a member of the Western Electricity Coordinating Council Operator Training Subcommittee and a member of the California Electric Training Advisory Committee.
Education/Credentials I completed a power systems certificate course at UCLA in 2004, with emphasis on power flow and system protection. I am also a NERC certified system operator.
Question I have rewire twice (around 6 month ago) the electric motor on a Elliot
Magnetek genertor 250 Kva (motor Century 2000). I am running well below
capacity, and I'm not been able to track way we have such failure.
Answer Hello Jose.
I'm sorry to hear about the problem with your generator.
Generally speaking, the causes of winding or stator failure on a generator are heat and short circuit stresses. You say that the generator is running well below capacity. Based on the size of this generator, I'm going to assume this is an induction machine, not a synchronous machine.
Check the load again and make certain you are not exceeding the kVA capability of the machine. Remember, kVA does not equal kW. If you need further clarification on that, let me know.
Also check to see if you have some heavy duty motor load connected. The starting current on those motors may be stressing the machine. Have you had any short circuits? Are you powering a heavy duty arc welder? These can also stress the machine.
Is the machine ventilated properly? If not, even moderate loads can cause the machine to overheat.
Finally, if everything else is fine, you may just have a lemon of a machine.
If you cannot determine these items on your own, you may need to hire an electrician to help you solve this.
I hope this answers your question. Please let me know what you find.
