Polymer Suspension Insulator

The contract calls for the supply of 115 kV one-piece polymer suspension insulators rated for 12,500 lbs rupture strength, designed for use in high-voltage transmission systems. These insulators must be made from silicone or silicone alloy-based materials and meet strict electrical performance criteria, including a critical flashover voltage of 695 kV for positive polarity and 670 kV for negative polarity, with an air gap of 43 inches. The insulators must withstand a 60 Hz dry flashover of 435 kV and a wet flashover of 295 kV, and maintain a minimum leakage distance of 57 inches to ensure reliable performance under contaminated conditions. Mechanical fittings are specified as a Y-clevis for the ground end and an ANSI 52-5 ball for the line end, ensuring compatibility with standard transmission hardware. Approved manufacturers and part numbers include specific models from LOCKE, VICTOR, OHIO, HUBBELL, RELIABLE, SEDI, and LAPPIN, all of which must meet exact technical specifications to qualify for procurement. The solicitation, identified as Z4919, is issued by Nashville Electric Service under the Tennessee state agency, targeting SLED segment buyers with a response deadline of August 6, 2026, at 7:00 PM. The posting date is August 3, 2026, and the place of performance is Nashville, Tennessee. Procurement inquiries and communications are directed to Bailey Allen, the primary point of contact, reachable via email at ballen1@nespower.com or by phone at 615-747-3724. Additional details and submission requirements are accessible through the vendor portal at the provided UI link, and all bidders must ensure compliance with the listed insulator models and performance standards to be considered eligible.