SMA SC 400HE - Manual (Page 68)

6 External Grid Monitoring Relay SMA Solar Technology AG
68 SC4-63HE-BE-BEN103280 Operating Manual
Adjust the setting for the "primary voltage converter" in accordance with the level of the medium
voltage at your system. This setting has no effect on monitoring, but only on the display of voltage
readings.
If you exit a menu in which a parameter was previously changed, the change is automatically saved.
6.3.5 Monitoring
The relay can monitor either the string voltages (four-conductor grid) or the line-to-line voltages (three-
conductor grid). In the case of medium voltage systems, it is usually the line-to-line voltages which are
monitored.
This parameter will no longer be displayed if you have set the parameter "Voltage measurement" to
three-conductor grid.
6.3.6 Overvoltage Monitoring
Monitoring for ...
Four-conductor/three-conductor grid; do not alter
Overvoltage monitoring ON/OFF
ON = overvoltage monitoring is activated. The
following parameters of this function are displayed.
OFF = overvoltage monitoring is deactivated. The
following parameters of this function will not be
displayed.
Parameters for "Three conductor grid": Threshold value for tripping at overvoltage in level 1.
Delay time for threshold value with overvoltage in
level 1