KMB NOVAR 2600, Operating Manual

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NOVAR 2600 Operating Manual
5.3.3.3 Recorded Values Aggregation
At models equipped with datalogging capability all of measured and evaluated data can be optionally
archived into the instrument's memory. The record period is presetable in a wide range and
aggregated data are archived.
The shortest aggregation interval is 1s while the longest configurable interval is 2 hours. If seconds
are selected then intervals are aggregated according to cycle count at actual frequency. Intervals
longer than one minute are aggregated according to a real time tick.
Where applicable not only the average value but minimum and maximum values over aggregation
interval can be stored too.
5.3.4 Embedded Electricity Meter
For electric energy measurement, stand-alone unit – electricity meter - is implemented inside
instruments. Energies are evaluated in compliance of the IEC 62053-24 standard : active energy from
full harmonic spectrum and reactive energy from the fundamental harmonic component only.
Except of electric energy, maximum active power demands are registered in the unit.
5.3.4.1 Electric Energy Processing
Measured values of electrical energy are recorded separately in four quadrants : active energy
consumed (
I
, import), active energy supplied (
E
, export), reactive energy inductive (
L
) and reactive
energy capacitive (
C
). Both single-phase and three-phase energies are processed.
In addition at selected models, three-phase energies are evaluated in three preset tariff zones ( time
of use ). The actual tariff can be controlled either by an actual RTC time using preset tariff zone table
with one hour resolution or by an external signal through a digital input.
Internal energy counters have sufficient capacity in order not to overflow during the whole instrument
lifetime. On the instrument's display only 9 digits can be viewed – therefore, after energy value
exceeds 999999999 kWh/kvarh, instrument's display format automatically switches to MWh/Mvarh,
then to GWh/Gvarh.
At selected models, electricity meter data can be periodically archived with a preset registering interval
into the instruments memory and can be analysed later after being downloaded into a PC.
5.3.4.2 Maximum Demand Registration
From the instantaneous measured values of all active powers the instrument evaluates their average
values per preset period using preset averaging method. In the electricity meter unit, such quantities
are called
actual demands ( AD ). Note that the actual demands are processed individually and their
averaging period is presetable independently on standard average values ( P
AVG
).
Their maximum values reached since the last clearing are called maximum demands ( MD ).
The AD values are not displayed on the instrument display – only their registered three-phase
maximums
3MD are.
The total maximums can be cleared independently of standard average maximums/minimums.
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