Minneapolis HPFF Refurbishment Project
Substation, Underground Electric
Cathodic Protection Update Complete on Six 115 kV HPFF Lines
- The purpose of the project was to improve the cathodic protection on six 115 kV HPFF lines from existing underground transmission lines.
- Hooper Corporation’s Underground Electrical Department installed 16 solid-state isolation surge protectors to replace existing polarization cells and improve cathodic protection.
- Installation of two one-inch SDR 113.5 HDPE interdicts through Xcel’s existing distribution duct and manhole system with one reel of ADL-ADSS 48-count fiber-optic cable.
- Cable pipe junction boxes were installed to replace existing rectifier.
- Installed bonding of three two-inch fluid pipes.
- A majority of this work was completed in downtown Minneapolis.