SMA Sunny Boy Control Light - Manual (Page 75)

Sunny Boy Control Light Chapter 7: Appendix
SUNBCL-11:NE
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SMA Regelsysteme GmbH
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Larger facilities: The optimal position of the phase coupler is sometimes difficult
to find. Main distribution and sub distribution are sometimes very far apart and
result in different reasonable positions of the phase coupler.
connection to
public grid
phase coupler
House electricity distribution
L1
L2
L3
sub-distribution
phase coupler
Sunny Boy
Control Light
Sunny Boy Sunny Boy
Fig. 7.8: Phase coupling for communication over different phases
Interfering Signals on the Grid
The data transmission is done with a frequency of 132.45 kHz. If other consumers
also use this frequency, the transmission may be disturbed when a certain level is
exceeded. Interfering signals can be developed by electric devices in the own
household (insufficiently filtered switching power supply or similar), but also by
devices in neighboring houses (e.g. electric devices with high power consumption in
the neighborhood).