2 Grid Protection Settings
SMA Solar Technology AG
Technical Information
STP60-SHP75-10-Parameter-TI-en-12
6
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
Summary of Contents for SHP 75-10
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