The shortest distance between two conductive parts, through air, is referred to as clearance, while creepage refers to the shortest path along the surface of an insulating material between those same conductive parts. Software tools designed to determine these distances assist engineers in ensuring electrical safety and preventing dielectric breakdown. For example, these tools might consider parameters like voltage, pollution degree, and altitude to calculate the required minimum distances.
Accurate determination of these critical distances is paramount for the reliable and safe operation of electrical equipment. Sufficient spacing prevents arcing and flashover, which can lead to equipment malfunction or even catastrophic failure. Historically, these values were often determined using manual look-up tables and conservative estimates. Modern computational tools offer greater precision and allow for optimized designs, leading to more compact and efficient devices.
