Excellent tips motorhead1 and BJC!
When storing large motors for prolonged periods of time, it is a good idea to diassamble the motor. Also, your storage programme should include scheduled peroidical (annual or biannual?)visual and insulation checks. Visual checks shall be done to see any signs...
Electricpete
This motor is driving a pump at one of our client's petrochem site. An increase in the load is anticipated due to modifications to the piping system.
The manufacture basically agreed to our assumption that we could overload this motor as long as the expected temperature rise is...
We discussed the issue in detail with the motor manufacturer. I am glad to note that the manufacturer agrees that this motor may be run at 107% of SF=1 load without seeing any detrimental effect on the winding or bearing life.
Thank you all once again for participation.
KJB
Jal
You need to provide some more information. What type of motor it is - shunt, series or compound? The figure 1.25V across armature does not make sense. You are saying that the motor does not rotate so the given voltages are at standstill. Is it a compound motor with a high resistance...
:-):-)From the views expressed by the knowledgable participants, I derive the confidence about the correctness of my initial assumption. The conclusion is as follows:
Running the motor at 107% of the rated load will cause a temperature rise of approximately 92C.
Expected temperature rise is...
Many thanks for the quick response motorhead1!:-)
You are absolutely right that the continuous operation of the motor at SF=1.15 load would cut the winding life to half.
However, in view of the following, I would be inclined to think that it should be safe to run this particular motor on...
Gentlemen
I am new to eng-tips and am fascinated by the enlightening discussions going on.
I have a question about a 3 Ph induction motor 2000HP, 4.16kV, SF 1.15, Max Amb Temp. 40C, Temp Rise for Design: RTD 85C at SF = 1, Insulation Class: F, EEMAC Design B. The motor is currently running at...
