Six-wire Hexagonal-section Alternately Connected Balanced Feeder

Author: Edmund A. Laport

This type of line (Fig. 4.27) has occasional use, especially when a very low impedance balanced line is required with large power-handling capacity or very low pickup from external fields. The low characteristic impedance reduces insulation loss for a given power-transmission capacity, and the equal current division among the three wires on each side of the circuit ensures maximum copper utilization for the reduction of copper loss.

Figure 4.28 shows a method of construction. Equations for this line are

When h >> a,

FIG. 4.28. Construction for type XIX feeder.