MI 2883 Energy Master
Theory and internal operation
145
A
– 10/12-cycle quantity value marked as “active”,
M
– number of 10/12 cycles measurements with active (non zero) value.
Arithmetic active average:
M
j
j
avgact
N
M
A
M
A
1
;
1
(60)
Where:
A
avgact
– quantity average over active part of given aggregation interval,
A
– 10/12-cycle quantity value in “active” part of interval,
M
– number of 10/12 cycles measurements with active (non zero) value.
Power and energy recording
Active power is aggregated into two different quantities: import (positive-consumed P+)
and export (negative-generated P-). Nonactive power and power factor are aggregated
into four parts: positive inductive (i+), positive capacitive (c+), negative inductive (i+)
and negative capacitive (c-).
Consumed/generated and inductive/capacitive phase/polarity diagram is shown on
figure below:
