The Fronius String Control 250/30 DCD DF string monitoring system has been specifically developed to meet the requirements of central inverters. With a current-carrying capacity of 250 A and maximum input voltage of 1 000 V, the device is suitable for the monitoring of photovoltaic systems that use Fronius Agilo inverters.
Module strings can now be professionally monitored and their data compared. Up to 30 module strings can all be connected together on one DC main line. This early fault detection feature prevents loss of yield.
If a problem such as shading, module failure or broken or chafed cabling occurs in one or more strings, the relevant monitoring system informs the operator immediately. As the cables are connected directly to the DC main line (V terminals) installation can be carried out without any special tools. The all-pole fuse protection of the strings on the DC side complies with standards in Australia, Great Britain and France.
The integrated, externally accessible DC disconnector ensures safe isolation of the PV generator from the inverter. With a separate DC power supply available as an option, the device is suitable for distances of more than 100 m between the solar modules and the Fronius monitoring system.