A contactless system for measuring centricity and diameter includes an optical measuring device for determining the external diameter and the position of a cable on an optical, perpendicular plane that runs transversally to the central axis Z of a measuring device. Further, when the second robots move to the shadow area where the first robots have been moved, the system performs the seamless localization by determining a relative location of the second robots based on the first robots on which the relative localization has been performed, thereby determining an absolute location of the second robots based on the relative location of the second robots. and a load of 300 gcm2, and a process for producing the same. The technician observes whether the breaker performs within the specifications for the selected protective function.