Underground Distribution Switchgear

This contract involves the procurement of a specific underground distribution switchgear model 633 designed for 15KV nominal voltage operations with a 25KA symmetrical interrupting capacity and 900A continuous current rating. The equipment features a submersible undercover style with a stainless steel tank and submersible wiring to ensure durability and reliability in underground installations. It includes a 1200A main bus, three 900A source interrupting switches, and three 900A vacuum fault load interrupting switches equipped with vacuum fault interrupters. The switchgear is designed with three-phase gang tripping bushing wells supplied with removable studs and provisions to accommodate future source-transfer equipment. Optional features incorporated in the package include potential indication with test features and provisions for low phasing, six two-hole ground pads (one per way), a remote low-pressure alarm with pre-wired connections for future use, three-pole manual fault interrupters on all vacuum fault interrupter ways, and a set of relay control cables with a USB connector that interfaces with NES laptop computers, making the switchgear remote supervisory control ready. The solicitation is issued by Nashville Electric Service in Tennessee, with the solicitation number Z4385 and a response deadline of May 7, 2026. The contract specifies that approved manufacturers or equivalent products must meet the standards set forth, with specific part numbers provided for compliance. Interested vendors are encouraged to submit proposals by the deadline via the NES vendor portal. The point of contact for this procurement is Bailey Allen, who can be reached via phone or email for additional information. This acquisition is part of Nashville Electric Service’s efforts to enhance and maintain its electrical distribution infrastructure with high-reliability underground switchgear suited for demanding electrical network environments.