SMA SHP 75-10 - Frequency-Dependent Disconnection; Disconnection Due to Underfrequency; Disconnection Due to Overfrequency; Connection, Reconnection and Disconnection

2 Grid Protection Settings
SMA Solar Technology AG
Technical InformationSTP60-SHP75-10-Parameter-TI-en-126
Parameter name Setting option
MAN_RST_UN_VTG on (1), off (0)
MAN_RST_OV_FREQ on (1), off (0)
MAN_RST_UN_FREQ on (1), off (0)
MAN_RST_PID on (1), off (0)
MAN_RST_AID on (1), off (0)
2.5 Frequency-Dependent Disconnection
2.5.1 Disconnection due to Underfrequency
The underfrequency disconnection function has two related values: the first value indicates the frequency level in Hertz,
the second value indicates the tripping time in seconds. Underfrequency disconnection works in the way that if the grid
frequency drops below the value stated in FMIN, the inverter stays connected to the grid for the time period stated in
T_FMIN. 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
FMIN 45Hz to FNOM 0.01 Hz
T_FMIN 0.05s to 90.0s 0.01s
2.5.2 Disconnection due to Overfrequency
The overfrequency disconnection function has two related values: the first value indicates the frequency level in Hertz,
the second value indicates the tripping time in seconds. Overfrequency disconnection works in the way that if the
power frequency exceeds the value stated in FMAX, the inverter stays connected to the grid for the time period stated
in T_FMAX. 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
FMAX FNOM to 66Hz 0.01 Hz
T_FMIN 0.05s to 90.0s 0.01s
2.6 Connection, Reconnection and Disconnection
2.6.1 Connection Time
The connection time is the time period of grid monitoring between start of the inverter and start of grid feed-in.
Parameter name Setting range Step size
T_CON 0s to 1800s 0.01s