Useful life expectancy
Useful life expectancy
(OP)
Does anyone know of an IEEE standard that describes the "Useful Life Expectancy" of electrical equipment, eg. panelboards, switchboards, circuit breakers, motor control centers, transformers, etc.???
If a standard doesn't exist, can anyone point me to studies that may have been completed and published?
Thanks in advance,...
If a standard doesn't exist, can anyone point me to studies that may have been completed and published?
Thanks in advance,...






RE: Useful life expectancy
"End of Life" is an economic decision that you make taking into account equipment reliability (as function of age), maintenance cost (as function of age), and replacement equipment cost.
RE: Useful life expectancy
To address the first and important part(Insulation), You may refer IEEE 43-1974, at clause 4.5.2, which gives a fair idea about diagnostic procedure.
Regarding the metal moving parts life expectancy, we may have to depend upon the type tests results(quality cponformance tests reports ), carried out by each manufacturer for each design.Hard to believe, we can rely on independent testing house interpretaion, and so on.
Hope I understood your question to some extent.
RE: Useful life expectancy
RE: Useful life expectancy
http://www.ise.nus.edu.sg/proceedings/apors2000/fullpapers/17-01-fp.htm
Thsi one is bhttp://www.siemenstd.com/prods/mv/techtopics/TechTopics15Rev0.pdfy
by Siemens and called Life Expectancy of electrical equipment.
Try searching google for "Electrical Equipment" and MTBF "mean time between failure". There are milspecs for these and suppliers have them for goverment contracts. NASA also compiled a lot data on this subject. I got a few hits under "bathtub curves"
Search Google under "electrical equipment life expectancy" you will get lots of hits. I use to do this more when I was in the nuclear business and thats when I found the NASA data on failure rates and life expectancy. Now most of the projects I work on lives of less that 10 years and get reworked in 3 or so.