The Naval Facilities Engineering Systems Command Pacific is conducting a market survey to identify potential sources for a transformer protection relay with performance equal to the brand name SEL-587Z, intended for the Electrical Backbone project at Pearl Harbor Naval Shipyard in Hawaii. The relay must provide high-impedance differential bus protection, ground fault protection, bus monitoring, event reporting, and communications integration. Interested parties must submit detailed technical data for government evaluation. Submissions are due by 2:00 p.m. HST on 30 July 2026. No budget amount is specified for this market research notice.