Power Transformer Replacement Program & Criteria
Power Transformer Replacement Program & Criteria
(OP)
Do you have the substation power transformer replacement program? Criteria?
Is there any publication of literature about this subject?
Thanks
Is there any publication of literature about this subject?
Thanks






RE: Power Transformer Replacement Program & Criteria
Results of oil tests and other maintenance testing are more important than the age of the transformers.
And the number of through-faults, I suppose.
RE: Power Transformer Replacement Program & Criteria
As the part of the Asset Management, we are now trying to develop a replacement program that is "Condition Based".
Thanks
RE: Power Transformer Replacement Program & Criteria
RE: Power Transformer Replacement Program & Criteria
Because of the nature of my business, all of them had specific requirements for periodic on-line and off-line testing. the data gathered were trended to note deteriorating conditions and remedial efforts were taken if one of the little things started to head towards self-destruction.
I can think of several units that went into service in 1940-1945 and they're still chugging along. Some have been rebuilt, some not, and some are and a more stringent testing regimen due to age and indications, but they're still out there. I know of one 45 kV station service transformer that was dated 1902, still in service in 1993. With the cost of replacement transformers, I'd certainly be reluctant to apply a hard age-based criteria to replacement.
I would, however, look at my more critical transformers a bit harder and take an active stance towards remediation on my schedule rather than waiting for failure.
old field guy
RE: Power Transformer Replacement Program & Criteria
There is only one reason to replace a power transformer: exhausting of isolation. Direct method for assessment is measurement of furfural, indirect method - polimerization steppe /PS/. The first trafo has PS=580, the second one - 280.
As You know when PS<250 begins process of degradation of cellulose isolation and that will be the end of the transformer.
Something terrible is stalking between the high voltage potentials