SMA Sunny Boy Control - Manual (Page 141)

Sunny Boy Control
SMA Technologie AG
User Manual SUNBC - 14 : NE0206 137
Transmission signal strongly dampened
Most frequently, transmission failures result from a damping of the carrier signal. The
reason may be that the distance between the inverters and the Sunny Boy Control is
too long, but most often, it is the presence of other electric devices connected to the
same line. Devices with a high input capacity can strongly dampen the carrier signal,
regardless of whether the device is switched on or not. Examples of such devices are:
washers, dryers, ranges, microwave ovens, PCs, and fluorescent lamps.
The easiest countermeasure is to connect the troubling device to another line and/or
another phase (refer to 1. in Fig. 9.9). Another possibility is to install an anti-
interference filter in the power supply line to the troubling device (refer to 2. in
Fig. 9.9).
In the rare event that the cable length or layout should be the cause for the transmis-
sion failure, it may be necessary to install a separate line from the inverters to the
Sunny Boy Control (refer to 3. in Fig. 9.9).
Betrieb Oper ation Erdschluss Earth Fault Stör ung Failure
Pho tovo ltaik -Stringwe chse lrichte r Photov oltaic string inverter SWR 1100E Betrieb
Oper ation Erdschl uss Earth Fault Störung Failure
Photovoltaik -Stringwechselrichter Photov oltaic string inverter SWR 1100E Betrieb
Operation Erdsc hluss Eart h Fau lt Störung Failure
Photovoltaik -Stringwechselrichter Photovoltaic string inver ter SWR 1100 E
PAC 1273 W
2. Device
filter
interfering
device
3. Branch line
1. reconnect
to another phase
House distribution
Connection
to utility
Sunny Boy
Control
Fig. 9.9: Interference suppression in case of strong signal damping