too little informtion, too many variables.
automatic or manual?
Last year I had an old Onan switch replaced with on from this company
The advantage is now I have automatic weekly test run and emergency start an
transfer under tighter tolerances. Previously all 3 phases has to fail
before it would auto start. In addition when power "stuttered" (rapid on off
events) the gen would try to start an stop instantly causing an overcrank
breaker to pop.
Unfortunately all new automatic transfer switches seem to be about half
computer thus more subject to computer type failures.
Also unfortunately I expect the computerized aspects will become rapidly
outmoded due to unavailability of parts so even if the electro - mechanical
portion of the switch remains pristine it will become non functional and
non-repairable in a few years.
Reliability is really quite good, although that is not to say that a
controller will never fail. I don't think obsolescence will be a problem, at
least not in a "few years" time frame. As long as you stay with one of the
name brands, you should be able to get a replacement control board or
retrofit a newer controller if it becomes necessary.
Benjamin D Miller, PE
When a major brand name controller fries on a blue sky day AND the service
techs say "oh we see a lot of this on this particular board" AND they charge
a small fortune for labor plus part on a 2 year old unit, that cost over
$36,000 I start to wonder about the next time and the time after that and
how long before management reaches the point where they say just don't get
it fixed anymore.
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