On 4/15/2011 10:48, John R Pierce wrote:
> On 04/15/11 4:38 AM, Howard Fleming wrote:
>> I have used several Best Ferrups UPSs over the years, other than one
>> that toasted it's transformer, have never had any trouble out of them
>> (just replace the battery every 3 to 4 years....).
>>
>> They are picky about their input power, do not run not connect them to
>> an auto regulating transformer (not the proper term?), or on the output
>> of other UPSs, it can cause interesting problems...
>
> I don't think they make any FerrUPS anymore. Those were based on a
> massive ferroresonant transformer which, yes, is very sensitive to the
> input frequency. Specifically, they don't like generator power, unless
> it has extremely well regulated frequency output (such as a DC generator
> with a digital sinusoidal converter)
Eaton has the Ferrups line now (still available as far as I know).
I have actually run into the input frequency problem in the past with
the Ferrups.
I was working at a gas company that for political reasons generated
their own power inhouse. Had one Ferrups UPS (of 10?) that was
complaining about it (kept going online/offline/online.... There is a
parameter in the settings that can be adjusted to allow a greater input
freq range on the UPS (59.5 - 60.5 hz is the default range, from what I
remember). In this case that took care of the problem.
I have 3 1.4kw units at home, no trouble to date running them off of my
backup generator (Campbell 5k unit). They are also 18 years old at this
point and still going... :o). Running 3 of my CentOS servers at home in
fact.
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
http://lists.centos.org/mailman/listinfo/centos
