Is there a IEEE standard for scheduling motor bake and dip frequency?
Is there a IEEE standard for scheduling motor bake and dip frequency?
(OP)
I am doing work for a facility that has a robust PM program based on plant experience. They wish to convert experience into written procedures. I am seeking published industry standards or article to support (or correct) their procedures.
We have been tracking down recognized standards that support their practice, but have not found one for recommending motor bake and dip frequency or criteria for when this should be accomplished. Is there an article or standard that offers guidelines?
[The facility has a good track record of scheduling motor PM including vibration monitoring, bearing temp, winding, on-line electrical tests and bake and dip PM. I do power distribution work and am not familiar with the details of the motor programs.]
We have been tracking down recognized standards that support their practice, but have not found one for recommending motor bake and dip frequency or criteria for when this should be accomplished. Is there an article or standard that offers guidelines?
[The facility has a good track record of scheduling motor PM including vibration monitoring, bearing temp, winding, on-line electrical tests and bake and dip PM. I do power distribution work and am not familiar with the details of the motor programs.]





RE: Is there a IEEE standard for scheduling motor bake and dip frequency?
RE: Is there a IEEE standard for scheduling motor bake and dip frequency?
I am pretty sure there is no IEEE standard which recommends PERIODIC dip and bake.
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RE: Is there a IEEE standard for scheduling motor bake and dip frequency?
I might have misunderstood whether they are performing dip and bake on schedule. I thought they were cleaning the windings (steam?) then baking to drive out impurities and then dip to restore any lost insulation. That is a guess. My questions was whether there is an industry standard based on service/severity and you have answered my question.
RE: Is there a IEEE standard for scheduling motor bake and dip frequency?
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RE: Is there a IEEE standard for scheduling motor bake and dip frequency?
I have dealt with some specifications where a "dip" is required every time the motor is repaired. I realize that that is an extreme and you are not advocating it. But I have always felt that "dipping" is of questionable value and advise that it not be part of a specification. Do we "dip"? Sometimes, ultimately the customer is right, they pay the bill (but we won't warranty it). Do we recommend it? No.
RE: Is there a IEEE standard for scheduling motor bake and dip frequency?
As a rewinder, I never dip or revarnish windings during repairs and overhaul. The machine is dipped and baked only when it is freshly wound. Subsequent dips will only degrade the residual life of the windings due to heat trapping by additional thermal layer of varnish. Also, any inaccessible accumulated winding dust will be permanently trapped by the varnish dip.