Being located close to energy end-users, Secondary Distribution Substations (SDS) are equipments that always exist in large numbers, spreading throughout the territory. In order to fight the theft of equipment in SDS that affects electrical utilities across the world, it is urgent to be able to , online and remotely. Eneida’s Theft Avoidance Smart System provides a robust online and real time surveillance of assets in SDS. With GSM/GPRS communication, our system reports any abnormal situation such as theft attempts, cable cutting-off and intrusion in facilities of pole-mounted and cabinet SDS. Primary energy failure is also reported. The energy backup, based on supercap technology, provides large operating temperatures operating range and an extended life and, as a smart system it avoids false alarms and allows remote configuration, diagnose and software update.