SMA SC 500CP XT - Manual (Page 114)

The tripping threshold is defined by the parameter FRTDbVolNomMin.
10.5.2.3 Dynamic Undervoltage Detection
The dynamic undervoltage detection extends the grid support in the event of undervoltage and changes the switch-off
behavior. The grid limits, which are stepped by default, are replaced by a continuous grid-limit function.
Figure 41: Maximum duration of a voltage dip that the inverter can work through without disconnecting from the utility grid
Position Parameter Description
1 VCtllLim Grid voltage limit level 1
2 VCtlllLim Grid voltage limit level 2
3 − Time at which the inverter disconnects from the utility grid.
A VCtllCharTm The delay time of the dynamic undervoltage detection defines the in-
tersection of the continuous grid-limit function with the time axis.
B VCtllLimTm Delay time for grid limit level 1
The function of the dynamic undervoltage detection is activated via the parameter VCtllCharEna. The function of the
dynamic undervoltage detection is activated by default for Romania.
10 Function Description SMA Solar Technology AG
User Manual SCCPXT-BA-E4-en-54 114