Měřící Energetické Aparáty
40
From the active power values P(l) found out in the individual measuring time intervals
T
m
with the serial numbers l = 1, 2, … L, the average active power is obtained for each of
the recording intervals T
z
(12)
and the minimum and maximum active power
(13)
From the reactive power Q(l) in the measuring intervals T
m
, the average reactive power is
determined from each of the recording intervals T
z
(14)
and the minimum maximum reactive power values.
During the recording interval T, the active energy
E
PZ
= T
Z
P
Z
(15)
and the reactive energy
E
QZ
= T
Z
Q
Z
(16)
was transmitted.
e above data characteristic for the recording intervals are obtained for all three phases.
DETERMINATION OF THE QUARTER-HOUR MAXIMUM CURRENTS
e algorithm used in the universal monitor MEg40
+
with 16 MB memory card in the
version with FW and SW 2008 is modied to allow equivalent evaluation of the quarter-
hour maximum currents and daily diagrams on the day of occurrence of the quarter-hour
maximum current for any selected evaluation period, and besides, the daily diagram
evaluation is also possible in any selected day.
( )
∑
=
=
L
l
z
lP
L
P
1
1
( )
∑
=
=
L
l
z
lQ
L
Q
1
1
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