SMA SC 400HE - Manual (Page 71)

SMA Solar Technology AG 6 External Grid Monitoring Relay
Operating Manual SC4-63HE-BE-BEN103280 71
6.3.9 Underfrequency Monitoring
Hysteresis for the overfrequency monitoring; this must
be exceeded before any reconnection is possible.
Underfrequency monitoring ON / OFF
ON = underfrequency monitoring is activated. The
following parameters of this function are displayed.
OFF = underfrequency monitoring is deactivated. The
following parameters of this function will not be
displayed.
Threshold value for tripping at underfrequency level 1
Delay time for threshold value with underfrequency
level 1
Threshold value for tripping at underfrequency level 2.
Delay time for threshold value with underfrequency
level 2
Hysteresis for the underfrequency; this must be
exceeded before any reconnection is possible.