2 Grid Protection Settings
SMA Solar Technology AG
Technical Information
5
STP60-SHP75-10-Parameter-TI-en-12
2.3.2
10-Minute Average Value
The ten-minute average value is defined in the standard EN 50160 as maximum threshold for a continuous high
voltage in the grid. If this value is exceeded, the inverter is disconnected from the utility grid.
Parameter name
Setting range
Step size
U10M_AVG
UNOM to 350 Vac (L-N)
0.1 Vac (L-N)
T_U10M_AVG
0.05 s to 90.0 s
0.01 s
2.3.3
Disconnection due to Overvoltage
The overvoltage disconnection function has two related values: the first value indicates the voltage level in volt, the
second value indicates the tripping time in seconds. Overvoltage disconnection works in the way that if the grid
voltage exceeds the value stated in
UMAX
, the inverter stays connected to the grid for the time period stated in
T_UMAX
. After this time has elapsed, the inverter must disconnect from the utility grid. Depending on the applied
standard, these two values can either be a maximum, minimum or mean value. Refer to the relevant standard to see
which of the three key values is used in your file.
Parameter name
Setting range
Step size
UMAX
UNOM to 350 Vac (L-N)
0.1 Vac (L-N)
T_UMAX
0.05 s to 90.0 s
0.01 s
2.4
Manual Restart
With the function Manual Restart, you can configure whether the inverter is to revert to feed-in operation automatically
after the fault has occurred, or whether feed-in operation should remain interrupted until it is manually reactivated.
2.4.1
Activating Manual Restart
The parameter
RST_MOD
activates the manual restart. A value of 1 causes that the user must start the inverter after a
grid fault. A value of 0 causes that the inverter reverts to feed-in operation automatically after the grid fault has been
rectified.
Parameter name
Setting option
RST_MOD
on (1), off (0)
2.4.2
Events Causing Grid Faults
The following events cause the inverter to interrupt feed-in operation and that the feed-in operation must be activated
through manual restart.
• Overvoltage
• Undervoltage
• Active islanding detection
• Passive islanding detection
• Overfrequency
• Underfrequency
If one of the parameters is set to value 1 and a corresponding grid fault occurs, a specific event is generated and the
inverter interrupts the feed-in operation until it is restarted manually.
Parameter name
Setting option
MAN_RST_OV_VTG
on (1), off (0)
Summary of Contents for SHP 75-10
Page 21: ......
Page 22: ...www SMA Solar com...
