Power line monitoring is an intelligent system for monitoring high-voltage lines. Self-powered sensors are installed directly on the lines and record inclination, temperature, current load and other operating data. This maximizes current-carrying capacity (ampacity) and detects line sag, icing and possible damage at an early stage. Wireless, encrypted communication enables reliable data transmission even under difficult conditions. The system helps grid operators to optimize line capacities, avoid outages and plan maintenance measures more efficiently.