[Nut-upsdev] [nut-commits] svn commit r1765 - in trunk: . drivers man
Arjen de Korte
nut+devel at de-korte.org
Mon Feb 16 12:45:31 UTC 2009
>>>>> 629 dstate_setinfo("ups.realpower", "%d",
>>>>> (int)((float)(p*256 + p) * 0.6)) ;
>> The output in W is 0.6 * VA
> This is getting confusing. Please explain what is reported here.
Can you please explain what is measured here? For the upcoming
nut-2.4.1 release I will comment this part out, as I believe this to
be in error.
Note that while the relationship
ups.realpower.nominal = 0.6 * ups.power.nominal
may be perfectly valid for this range of UPS (rated W will be
somewhere between 0.6 and 0.9 rated VA for most if not all UPS
devices), there is no way to make this assumption for
ups.realpower = 0.6 * ups.power
which is the actually delivered W and VA. This relationship depends on
the characteristics of the load (not the UPS). So you can't calculate
one by multiplying by a fixed value (this has to be measured).
Best regards, Arjen
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