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Equipment's Life Service

thread248-28345

Equipment's Life Service

Equipment's Life Service

(OP)
Does anyone know the service mean life of some typical electrical equipments (switchboards, power transformers, cos Fi correction batteries, protections)? If not, where can I find this information?

Thnaks

RE: Equipment's Life Service

The Gold Book IEEE 493-1997 has info on reliability of electrical (power) equipment.  The failure rate and particularly failure rate as a function of age may be helpful in judging the equipment's useful life.  To completely answer that question you will also need to know cost of failures and maintenance cost of exisitng equipment as compared to replacment/maintenance cost of new equipment.

Never an easy question and I haven't seen many pat answers. The failure rate studies are the place to start IMHO.

RE: Equipment's Life Service

One definition of service life that has recently become more in vogue is:

the point in time when the cumulative repair cost equals 1/2 the replacement cost

TTFN

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