3 Grid Failure
SMA Solar Technology AG
Technical Information
STP60-SHP75-10-Parameter-TI-en-12
8
3.2
Phase Failure Detection
The phase failure detection is used to determine the failure of one or more line conductors of the utility grid. In case of
a grid failure, the grid relays open.
Parameter name
Setting options
OPEN_PH_DETECT
on (1)
off (0)
The ramp-in factor describes the ramp for the power up of the inverter. More details can be found in the settings for
grid management services under parameter
Connection/reconnection ramp rate
.
3.3
Rate of Change of Frequency
The parameter
RoCoF
or
Rate of Change of Frequency
measures the change in frequency. If the change in
frequency exceeds the stated maximum limit for a longer period of time, the inverter disconnects from the utility grid.
The frequency can change very rapidly if one or several line conductors fail.
Parameter name
Setting range
Step size
LOM_ROC
0 Hz/s to 10 Hz/s
0.01 Hz/s
LOM_ROC
0 Hz/s to 10 Hz/s
0.01 Hz/s
T_LOM_ROC
0 s to 1800 s
0.01 s
LOM_ROC_THR
0 Hz to 5.0 Hz
0.01 Hz
Summary of Contents for SHP 75-10
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