Protection of mixed overhead-underground lines
CFD offers a reliable, fully passive, line differential (87L) or Earth Overcurrent (50G) solution
Flexible Current Transformer SDO FCT
ARTECHE’s SDO FCT is a passive, flexible, optical current transformer.
Passive: The SDO FCT does not need any external power source, it receives the light pulses that ARTECHE’s SDO MU CFD sends and, thanks to ARTECHE’s Faraday-effect based current sensing technology, it provides a Class 5P current measurement.
Easy to install: The current sensing is done in a 20m sensing cable. This is a loose cable that has to be wrapped around the overhead-underground transition point (at the insulated cable side, so no additional insulator is necessary). It is not necessary to make any changes to the overhead-underground transition, which makes it suitable both for new lines and for retrofitting existing lines.