Superconductors are remarkable materials that reveal their full potential at very low temperatures (around -200°C). They offer very high resistance when the current is excessive (in the event of a fault) yet has no impact on the transport of electricity when the current is at a normal level.

This brilliant solution is particularly relevant to DC networks, since it is a passive system offering maximum security without the need for high-speed circuit breakers.

SuperGrid Institute has therefore developed a prototype resistive superconducting fault current limiter (RSFCL) which ensures perfect conductivity in normal operation and very high resistance in the event of a fault current.