The use of the reno 100 magnetic field program for inductance calculation in three-phase systems

The inductance of one phase conductor of a three-phase supply system is expressed as the mutual inductance between loops formed of this phase and the two other phases then this mutual inductance is calculated as the flux cross-section is divided into small sections for which the flux is computed as flux density in the center of the section times area of the section. The flux density is calculated as by the RENO 100 program. This RENO 100 is transformed into the RENO 400 by sifting out the geometry of the source loop and the field-loop into subroutines. Truncated parts of the field loop require another (truncation) subroutine. As a typical example the inductance of a phase of a three phase busbar system supplying an arc furnace in a steel-work is given.