SMA SC 400HE - Manual (Page 58)

4 Sunny Central Control SMA Solar Technology AG
58 SC4-63HE-BE-BEN103280 Operating Manual
4.9.5 Setting the Medium Voltage
The medium voltage of the inverter must match with the medium voltage of the MV grid.
It is important that the transmission ratio of the external medium-voltage transformer is adjusted at the
same time. The undervoltage side is already preset according to the specific device.
The default value of the parameter "VRtg" is specified in the parameter list (see section 9.4 "Grid
Decoupling / Voltage", page 96).
1. Select Device Set-up > Parameters > Grid decoupling > Voltage > VRtg.
2. Select the parameter "VRtg" and confirm by pressing [ENTER].
3. Select Device Set-up > Parameters > Grid decoupling > Voltage > TrfVolExlHi.
4. Select the parameter "TrfVolExlHi" and confirm by pressing [ENTER].
4.9.6 Configuring the Decoupling Protection Ramp
After a grid fault, the Sunny Central restarts at a maximum 10% of nominal power per minute using
a decoupling protection ramp. You have the option of switching this decoupling protection ramp on
or off.
If you switch the decoupling protection ramp off, the Sunny Central quickly returns to maximum
power.
If you wish to deactivate the decoupling protection ramp, consult the SMA Serviceline.