13.2kV Underground Feeder

Allgeier Martin designed the conversion of a short 13.2 kV feeder originating from an existing substation in Southwest Missouri. The project replaced a 4/0 ACSR conductor with 477 ACSR supported by parallel underground 500 MCM aluminum ties. A new padmount switchgear was installed to enable interconnection with an existing circuit. Construction included building new lines while converting older infrastructure to minimize service disruption.

The design incorporated interconnections to three existing circuits, with multiple overhead switches installed to enhance switching flexibility. One of these circuits serves a heavily loaded commercial area, making this upgrade critical for relieving system stress. Combining overhead and underground construction created a robust backbone, improving reliability and maintaining aesthetics in high-traffic zones.