7 Grid Monitoring
SMA Solar Technology AG
48
SCCP-JP-BA-A4-en-12
User Manual
7.6 Setting the Medium Voltage
The medium voltage of the Sunny Central must match the medium voltage of the medium-voltage grid.
It is important that the transmission ratio of the external MV transformer is adjusted at the same time. The undervoltage
side is already preset for the specific device.
Refer to the parameter list (see Section 12.1.2 "Grid Monitoring/Grid Limits", page 98) for the default value of the
parameter
VRtg.
Procedure:
1. Log into the user interface.
2. Set the parameter
TrfVolExlHi
3. Set the parameter
VRtg
.
4. Confirm the parameter entry with [
Save
].
7.7 Activating the Manual Resume Mode
If the Sunny Central has switched off due to grid limit infringement, you can prevent an automatic restart of the
Sunny Central. The Sunny Central will not switch back on until the error has been acknowledged. You can activate the
Manual Resume Mode for individual errors of grid limit infringement. You can read off the reason for the current restart
block in the instantaneous value
ManResStt
.
Procedure:
1. Log into the user interface.
2. To activate the Manual Resume Mode for individual disturbances, set the desired parameters to
On
:
3. Confirm the parameter entry with [
Save
].
Manual Resume Mode after
Parameter
Disconnection due to overvoltage
ManResOvrVol
Disconnection due to undervoltage
ManResUndrVol
Disconnection due to overfrequency
ManResOvrFrq
Disconnection due to underfrequency
ManResUndrFrq
Disconnection due to passive islanding detection
ManResPID
Disconnection due to disturbance in a line
conductor
ManResPLD
