Siemens' SICAM FSI is a fault detection device for medium voltage overhead line networks that offers two versions: one without communication for local fault signaling via LEDs, and another with communication that transmits fault data to a control center. It enhances the reliability and availability of overhead line networks through quick fault detection, high sensitivity, energy-efficient design, and maintenance-free operation, with a battery life of 10 years. The system allows for flexible local and remote monitoring, thereby optimizing operations and facilitating faster restoration of power during outages.