Lubbock Power & Light
Executed concurrently, these projects consisted of equipment upgrades to four different substations; Chalker, CO-OP, MacKenzie, and McDonald; for Lubbock Power & Light.
The improvements varied between stations, but primarily included replacements of older 69kV OCB’s with new 2000A 69kV SF6 gas breakers and removal of old electromechanical relays and installation of new digital protective relay panels. The scope of work also included removal of old relay panels associated with the LP&L power transformers and installation of new digital protective relay panels. The 69kV disconnects and three phase gang operated switches, associated with the breakers, were also replaced with 2000A devices. M&S Engineering completed all the design and drawings necessary for these station upgrades and included new relay settings for the digital protective relay panels.
At the McDonald facility the T1 345/138kV Autotransformer was replaced with a larger capacity unit and the electromechanical protective relaying was removed and replaced with a new digital relay panels.
At the CO-OP station there was a new digital 69kV Bus Differential panel install.