Equations for the inductance and short-circuit forces of 3-phase busses comprised of 120-degree angles

THREE-PHASE busses comprised of 120-degree-angle conductors, as shown in Fig. 1, possess certain very desirable electrical-mechanical characteristics. Thus, they can be closely nested to the end that the reactance per unit length of bus, and thus the voltage drop per unit length of bus, are much smaller than on other shaped busses of similar current-carrying capacity. Again, 120-degree-angle conductors have considerable mechanical rigidity with which to withstand short-circuit forces. Finally, their shape enables an open, compact construction which simplifies ventilation and heat-dissipation problems, minimizes the space required for installation, and provides easy tap-off to individual loads.