Inverter Operation
SMA
Technologie AG
Page 84
SI5048-11:EE4206
Technical Description
12.5 Automatic Frequency Adjustment
Clocks that depend on the stability of the grid frequency for their accuracy become
increasingly inaccurate when there are constant frequency deviations. Frequency
fluctuations, i.e. deviations from the nominal frequency occur, for example, in stand-
alone grid systems that operate with a diesel generator.
The "
A
utomatic
FR
equency
A
djustment (AFRA)" function of the Sunny Island 5048, also
referred to as a tertiary control, allows the trouble-free use of grid-connected clocks in
these types of stand-alone systems. This function is activated using the "#270.08
TertCtlEna" parameter (activated by default).
The time difference is somewhat compensated on average.
Messages can be displayed at any time while the device is in operation and they
have priority over the Home Screen display.
The internal clock in the Sunny Island 5048 is quartz-controlled and thus operates
correctly (within the tolerance limits). The adjustment refers to externally connected
clocks that depend on the grid frequency.
Summary of Contents for Sunny Island 5048
Page 22: ...The Sunny Island 5048 SMA Technologie AG Page 22 SI5048 11 EE4206 Technical Description...
Page 26: ...Safety Instructions SMA Technologie AG Page 26 SI5048 11 EE4206 Technical Description...
Page 94: ...Battery Management SMA Technologie AG Page 94 SI5048 11 EE4206 Technical Description...
Page 114: ...Connecting External Sources SMA Technologie AG Page 114 SI5048 11 EE4206 Technical Description...
Page 160: ...Contact SMA Technologie AG Page 160 SI5048 11 EE4206 Technical Description...
Page 169: ...SMA Technologie AG Glossary Technical Description SI5048 11 EE4206 Seite 169...
Page 171: ......