Siemens SICAM, Manual, Page: 39 / 174

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
Table B-5 .
i
i
NOTE
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
The following power-flow direction parameters define the polarity of the CT/LoPo sensor for I
1
, I
2
, and I
3
meas-
urements:
•
I
1
power-flow direction
•
I
2
/I
N
power-flow direction
•
I
3
power-flow direction
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
I
1
Power-Flow Direction, Page 124 .
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
N
angle, I
N
power-flow direction, and I
N
> fault direction. The corrected angles for I
1
, I
2
,
and I
3
are displayed in the Modbus input register.
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
N
affects the I
N
power-flow direction, I
N
fault direction, and watt-metric
ground current. The original I
N
angle before correction is displayed in the Modbus input register and is used
for deriving the I
2
angle.
The power-flow direction reversal for I
1
and I
3
affects the respective power-flow direction, fault direction, and
power. The corrected angles for I
1
and I
3
are displayed in the Modbus input register.
If the power-flow direction parameters are set to
not reversed
, the fault direction is shifted by 180°.
P,Q Sign
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.
4.1.11
4.1.12
Device Functions
4.1 Description
SICAM, Feeder Condition Monitor, Manual 39
E50417-H8940-C580-A4, Edition 03.2019