SMA SC 200 - Manual (Page 66)

External Grid Monitoring Relay (optional) SMA Solar Technology AG
66 SC-BEN100262 User Manual
12.3.3 Parameters
Voltage measurement
Voltage transformer configuration
Adjust the setting for the primary voltage transformer to the medium-voltage value to match your
system. This setting has no effect on monitoring, but only on the display of voltage readings.
12.3.4 Monitoring
This parameter is masked out as soon as you have set the "voltage measurement" parameter to three-
wire system.
When setting the voltage thresholds please note the following:
• Sunny Central with integrated transformer: set the threshold values as absolute values in volts,
corresponding to those present at the grid connection.
Voltage measurement
Four-wire system / three-wire system
Do not change
Voltage transformer secondary
Device-specific presetting, do not change.
Voltage transformer primary
For Sunny Central devices without an integrated
transformer, enter the voltage of the medium-voltage
side (e.g. 20 kV).
For Sunny Central devices with an integrated
transformer, this parameter is preset according to the
specific device and the setting must not be
changed.
Monitoring for...
Three-wire / four-wire system; default for Sunny
Central with integrated transformer: four-wire
system; default for Sunny Central without
integrated transformer: three-wire system
Do not change