Fast Calculation of Gradients for the Center Phase of a Three-Phase Bundle Conductor Line with Any Number of Subconductors

The calculation of gradients for the center phase of a three-phase line in flat arrangement is discussed. A simple way is shown to calculate gradients with a very fair accuracy and without the use of a computer. An even faster way to proceed using an extremely short computer program is also described. The method applies to bundles with any number of subconductors.