FUNCTION CHARACTERISTICS
91
NVA100X-D - Manual - 02 - 2016
Directional active overpower - 32P
Preface
The active power is calculated as:
P
=
U
L1
I
L1
cos
φ
L1
+
U
L2
I
L2
cos
φ
L2
+
U
L3
I
L3
cos
φ
L3
where:
U
L1
,
U
L2
,
U
L3
are the fundamental components of the phase-to-neutral voltages
I
L1
,
I
L2
,
I
L3
are the fundamental components of the phase currents
cos
φ
L1
, cos
φ
L2
, cos
φ
L3
are the phase power factors
φ
L1
,
φ
L2
,
φ
L3
, are the displacement angles of phase currents
I
L1
,
I
L2
,
I
L3
respect to the phase voltages
U
L1
,
U
L2
,
U
L3
, (positive when lag currents compared the phase voltages).
Operation and settings
The element is enabled for start and trip on the base of the direction setting for the two indepen-
dently programmable thresholds.
P1> Tripping direction:
P Forward
:
P1> Tripping direction:
P Reverse
:
P1> Tripping direction:
P Forwaed/Reverse
:
—
•
•
•
P
Q
TRIP
P
1
>
P1> Tripping direction: P Forward:
General operation time characteristic for the directional active overpower element - 32P
P
Q
TRIP
P
1
>
P1> Tripping direction: P Forward:
General operation time characteristic for the directional active overpower element - 32P
P
Q
Caratteristica d’intervento relativa alla soglia P1> della funzione di Massima potenza attiva
direzionale (32P)
Impostazione Direzione d’intervento: P Inversa
TRIP
P
1
>
P
Q
Caratteristica d’intervento relativa alla soglia P1> della funzione di Massima potenza attiva
direzionale (32P)
Impostazione Direzione d’intervento: P Inversa
TRIP
P
1
>
P
Q
TRIP
P
1
>
TRIP
P
1
>
P1> Tripping direction: P Forward/Reverse:
General operation time characteristic for the directional active overpower element - 32P
P
Q
TRIP
P
1
>
TRIP
P
1
>
P1> Tripping direction: P Forward/Reverse:
General operation time characteristic for the directional active overpower element - 32P
