VEGA74
EN - 46
12.5. MEASURING METHOD: OUTLINES
The meter is capable of measuring: voltages, currents, active powers, inductive and
capacitive reactive powers, apparent powers, inductive and capacitive power factors,
energies, analogical or pulse parameters. All these parameters are analysed in a digital
way for each phase (voltage and current) and calculated based on formulas of the
previous sections.
Aggregation time
The storage of all the data would require a huge memory capacity. Therefore we’ve tried to
find out a storage method which permits to compress the information to be saved providing
significant data. The selected method is the integration one: after a certain period called
“
aggregation time
”, which can be set from
2
seconds
to 30 minutes
, the meter extracts
from the sampled values the following values:
•
MINIMUM value of the parameter during the aggregation time (harmonics excluded).
•
AVERAGE value of the parameter (intended as arithmetic average of all the values
recorded during the aggregation time).
•
MAXIMUM value of the parameter during the aggregation time (harmonics excluded).
Only this information (repeated for each parameter to be stored) are saved in the memory
along with starting time and date of the aggregation time. Once these data are stored, the
instrument restarts to take measurements for a new interval.
