Thytronic XMR-D - Directional Reactive Overpower - 32 Q

FUNCTION CHARACTERISTICS
109
— Directional reactive overpower - 32Q
Preface
The ractive power is calculated as:
Q=U
L1
I
L1
sinf
L1
+ U
L2
I
L2
sinf
L2
+U
L3
I
L3
sinf
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
• f
L1
, f
L2
, f
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 independent-
ly programmable thresholds.
Q1> Tripping direction:
QForward:
Q1> Tripping direction: QReverse:
Q1> Tripping direction: QForward/Reverse:
The element has two adjustable thresholds with time definite delay.
P
Q
TRIP
Q
1
>
Q1> Tripping direction: Q Forward:
General operation time characteristic for the directional reactive overpower element - 32Q
P
Q
TRIP
Q
1
>
Q1> Tripping direction: Q Reverse:
General operation time characteristic for the directional reactive overpower element - 32Q
P
Q
TRIP
TRIP
Q
1
>
Q
1
>
Q1> Tripping direction: Q Forward/Reverse:
General operation time characteristic for the directional reactive overpower element - 32Q
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021