
FUNCTION CHARACTERISTICS
30
NA20 - Manual - 04 - 2022
• Rolling demand (
I
L1ROL
,
I
L2ROL
,
I
L3ROL
, ±
P
ROL
, ±
Q
ROL
)
Inside an adjustable time interval
N
ROL
∙
t
ROL
, an average magnitude is calculated for phase currents
I
L1
,
I
L2
,
I
L3
, active power ±
P
and reactive power ±
Q
of measures taken every second, where
t
ROL
is
the length of any time subinterval and
N
ROL
is the number of the time intervals. The average values
are stored at the end of the same time subinterval.
• Peak (
I
L1MAX
,
I
L2MAX
,
I
L3MAX
, ±
P
MAX
, ±
Q
MAX
)
Inside an adjustable time interval
t
ROL
, the maximum magnitude is calculated for phase currents
I
L1
,
I
L2
,
I
L3
, active power ±
P
and reactive power ±
Q
of measures taken every second. The average values
are stored at the end of the same time interval
t
ROL
(Rolling demand common parameter).
• Minimum (
I
L1MIN
,
I
L2MIN
,
I
L3MIN
, ±
P
MIN
, ±
Q
MIN
)
Inside an adjustable time interval
t
ROL
, the minimum magnitude is calculated for phase currents
I
L1
,
I
L2
,
I
L3
, active power ±
P
and reactive power ±
Q
of measures taken every second. The average values
are stored at the end of the same time interval
t
ROL
(Rolling demand common parameter).
Use of over-described measures is shown in the following tables.
Rol-Demand.ai
Esempio media mobile con
N
ROL=4
I
L1ROL
I
L 2ROL
I
L 3ROL
(
I
n
)
I
L2
I
L1
I
L3
0
1
2
3
4
5
1s
t
ROL
t
ROL
N
ROL
t
ROL
t
ROL
t
ROL
6
t
ROL
Media aritmetica nell’inervallo
t
ROL
I
L xROL
=
I
L xk
t
ROL
∙60
t
R OL
∙60
k=1
∑
N
R OL
n=1
n
∑
1
N
ROL
1
Max-Demand.ai
Massimo valore delle medie nell’inervallo
t
ROL
Media aritmetica nell’inervallo
t
ROL
I
L1MA X
I
L 2MA X
I
L 3MA X
(
I
n
)
I
L2
I
L1
I
L3
1s
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
MAX
I
L xMA X
=
I
L xn
t
ROL
∙60
t
R OL
∙60
n=1
∑
1
Min-Demand.ai
Minimo valore delle medie nell’inervallo
t
ROL
Media aritmetica nell’inervallo
t
ROL
Reset
I
L1MIN
I
L 2MIN
I
L 3MIN
(
I
n
)
I
L2
I
L1
I
L3
1s
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
t
ROL
MIN
I
L xMIN
=
I
L xn
t
ROL
∙60
t
R OL
∙60
n=1
∑
1
Содержание NA20
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