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2.2. ACTIVE ENERGY
Based on successive values of the instant power, KES Energy Saver can manage the count
of the
total energy consumed
per hour, day, week or month, as well as calculating daily, weekly
and monthly average consumptions.
KES can also make
estimations of the energy
that would be consumed during a whole day if the
current value of the instant power were kept constant for 24 hours. This estimation can be
expressed in terms of consumption (kWh) and in terms of cost (local currency).
Daily, weekly and monthly values of the actual energy consumed can be expressed in terms of
consumption (kWh), of cost (local currency), or even in terms of the CO
2
(kgCO
2
) sent to the
atmosphere in order to produce such quantity of energy.
If both, estimations and energy consumption, are set to be expressed in terms of cost, KES allows
specifying up to four different tariff values (in cents of the local currency per kWh).
2.3. POWER LIMITS
KES can also monitor the level of the consumed power in relation to certain limits, initially
defined by parameter:
upper limit
and
lower limit
(linked to an overconsumption alarm and to a
low-consumption indicator, respectively), and a certain margin (or
deadband
) respect to each of the
two limits.
Figure 2.1 shows an example of the process. When the instant power is higher than the upper limit,
KES sends an overconsumption alarm (if configured) and this will not be deactivated until the
instant power is back again lower than the upper limit minus the margin band. If the value of the
instant power keeps decreasing, KES will send (if configured) a low-consumption indicator as soon
as the power is lower than the lower limit. This indicator will remain active until the power is back
again higher than the lower limit plus the margin band.
