This is a fault detection process using a sophisticated infra-red digital thermography camera that detects loose electrical cables or connections that are becoming hot from carrying currents above their rated capacity. This tool ensures the reliability of power supply, especially important for factories that operate on a 24-hour cycle.
This is recommended once a year, and this will to reduce fire risk, and well as reduce unplanned power failures. (Some insurance companies offer discounts on fire premiums if you have a thermo-graphic scan every year)