Power-Flow Direction Reversal; P,Q Sign - Siemens SICAM Manual

If Correction Factor parameter (holding register address 79) is set to 1 (enabled), then the correction
factors with the holding addresses 80 to 91 are set to the default values. For more information about holding
registers, refer to
NOTE
i
i
The voltage magnitude and voltage angle offset are applicable only for the 3.25/√3 LoPo VT.
The current magnitude and current angle offset are applicable only for the LoPo current sensor.

Power-Flow Direction Reversal

4.1.11
The following power-flow direction parameters define the polarity of the CT/LoPo sensor for I
urements:
•
I power-flow direction
1
•
I /I power-flow direction
2 N
•
I power-flow direction
3
If the CT/LoPo sensor is connected in the opposite direction, the current measured using the CT/LoPo sensor
has an additional phase shift of 180°. The power-flow direction parameters are used to compensate the addi-
tional phase shift.
If the power-flow direction parameters are set to reversed, the power-flow direction is reversed by adding
180° to the respective measured phase-current angle.
If the power-flow direction parameters are set to not reversed, it restores the power-flow direction to the
original direction.
For more information about power-flow direction parameters, refer to
Power-Flow Direction Reversal for Solidly-Grounded System
The following power-flow direction reversal parameters affect the respective power-flow direction, fault direc-
tion, and power:
•
I
1
•
I
2
•
I
3
They also affect the I
and I are displayed in the Modbus input register.
3
If the power-flow direction parameters are set to reversed, the fault direction is shifted by 180°.
Power-Flow Direction Reversal for Resonant/Isolated Grounded System
The power-flow direction reversal for I
ground current. The original I
for deriving the I
The power-flow direction reversal for I
power. The corrected angles for I
If the power-flow direction parameters are set to not reversed, the fault direction is shifted by 180°.

P,Q Sign

4.1.12
The P,Q sign parameter is used to reverse the sign of active power (P) and reactive power (Q) for all phases.
The P,Q sign parameter cannot be configured for individual phases.
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019
Table B-5.
angle, I power-flow direction, and I
N N
affects the I
N
angle before correction is displayed in the Modbus input register and is used
N
angle.
2
and I
1
and I are displayed in the Modbus input register.
1 3
I
1
> fault direction. The corrected angles for I
N
power-flow direction, I
N
affects the respective power-flow direction, fault direction, and
3
Device Functions
4.1 Description
, I , and I
1 2
Power-Flow Direction, Page
fault direction, and watt-metric
N
meas-
3
124.
, I ,
1 2
39