For the Dy-11 transformer type, the secondary side of the transformer lags the primary side of the transformer
by a phase of 330°. As such the transformer angle is set to 330°.
If the
Primary voltage
parameter is not set to 400/√3, the settings for transformer type, voltage correc-
tion, and transformer angle do not have any relevance.
i
i
NOTE
Presently, the transformer-type options other than Dy-11 are not supported.
Voltage Measurement via Integrated Voltage-Detecting Systems
The SICAM FCM (6MD2322-0AA10-1AA0) can be used to measure the primary voltages in a medium-voltage
system by connecting to integrated voltage-detecting systems (VDS) with low resistance modified (LRM) inter-
face. Both the SICAM FCM and VDS device are connected in parallel connections. For the current measure-
ments, the inputs are provided via LoPo sensors or CT adaptor.
[dw_sfcm-volmsrmtVDS, 2, en_US]
Figure 4-22
SICAM FCM - Voltage Measurement in VDS
The capacitances C1 and C2 are located internally to the RMU bushing and in the VDS device respectively.
When the device is connected for the first time as per the scheme, you must calibrate the device via the HMI
or Modbus to get the accurate voltage measurements.
Auto Calibration
You must calibrate the device when it is connected in the VDS system. You can calibrate the device via the HMI
or Modbus.
i
i
NOTE
The auto calibration can be performed when there is no fault condition.
To auto calibrate the device at rated network voltage, proceed as follows.
²
Set the rated primary voltage with HMI or Modbus (Address 10).
²
Set the auto calibration primary voltage with HMI or Modbus (Address 49). The auto calibration voltage is
the actual primary voltage calibrated during the auto calibration.
²
Navigate to Process Parameters > Auto calibration.
4.1.32
Device Functions
4.1 Description
54
SICAM, Feeder Condition Monitor, Manual
E50417-H8940-C580-A4, Edition 03.2019