Attachment J-1602000-03 Electrical Distribution.xlsx

This is an electrical distribution asset inventory spreadsheet for the Naval Research Laboratory (NRL) facility located in Washington, DC. The document itemizes electrical power distribution equipment organized by location and system classification, providing a comprehensive catalog of infrastructure supporting the facility's electrical utilities.

The inventory includes detailed asset information for switch stations, substations, circuits, and associated equipment across multiple NRL buildings. Switch station assets at NRL-35B contain five pad-mounted load break switches (SW-C53, SW-C55, SW-C61, and spares) rated at 13,800 volts, along with corresponding enclosures, all installed in 1980. Substation equipment is distributed across multiple buildings, including NRL-207 (containing transformers T-155 through T-158 with capacities ranging from 500 to 1,500 kVA, along with associated circuit breakers and electromechanical relays), NRL-210 (with multiple unit substation switches, transformers T-171 through T-185 rated 1,250 to 2,000 kVA, and a programmable logic controller installed in 2015), and NRL-246 (the main switch station with extensive protective relay equipment and battery systems updated in 2015). Circuit distribution assets span multiple feeder routes (designated as NRL-EL-CKT combinations such as C53/D50, C55/D52, C61/D57, E51/F56, E58/F59, E60/F59, G5 through G13, and H5 through H12) with pad-mounted distribution transformers ranging from 500 to 2,500 kVA, load break switches, disconnect switches, and associated protective relays. Equipment installation dates range from 1964 to 2021, with recent upgrades in 2015, 2017, and 2019 for solid-state relays and vacuum fault interrupters. The inventory also includes underground primary distribution lines rated at 15,000 volts and electric meters serving various facility buildings and distribution circuits.