Denton Ionwave #9158 Addendum 2

Denton seeks utility instrument transformers for substations

The City of Denton is seeking utility-grade instrument transformers for its substations, with estimated quantities spanning a five-year purchasing period. - Government buyer: City of Denton, Purchasing, Denton, Texas. - Requested products and estimated quantities: - Potential transformers (PTs): 69 kV (3), 138 kV (80), 345 kV (36), 13.2 kV dry type (3), and 24.9 kV dry type (3). - Extended-range current transformers (CTs): 69 kV (3) and 138 kV (6). - Capacitive-coupled voltage transformers (CCVTs): 345 kV (36). - Quantities are estimates over five years; manufacturers and catalog numbers are to be proposed. No transformer OEM is specified. - Key technical requirements: - Equipment must be completely assembled and tested, meet applicable ANSI/IEEE requirements, and include certified factory test reports. - PTs require at least 0.3% accuracy; CTs require at least 0.15% accuracy. Voltage-specific ratios, burdens, thermal ratings, insulation, and construction are specified. - The 345 kV CCVT specification includes 362 kV maximum system voltage, 1,550 kV BIL, at least 0.3% accuracy, and specified burden and ratio requirements. The City may review a proposed 680 kV dry-withstand alternative to the specified 785 kV rating if supporting specifications are provided. - Dry-type 13.2 kV and 24.9 kV PTs must use cast hydrophobic cycloaliphatic epoxy (HCEP) or an equivalent material. - Grounding lugs must be 4/0 soft-drawn bare copper, NEMA two-hole compression type. Burndy (YA28A5) and Anderson (VACL4012BN) are cited as examples for the lugs, not as transformer manufacturers. - Delivery and support: FOB destination to Denton-area substations, fully assembled and ready for installation. Offers must include delivery costs and provide schedules, design drawings, instructions, manufacturer-backed warranty, and replacement support. A minimum 12-month warranty from first energization is specified. - Term: One-year initial term, four optional one-year renewals, and a possible extension of up to six months.

Description

The City of Denton is requesting proposals to supply completely assembled and tested electric utility instrument transformers for its 13.2kV, 24.9kV, 69kV, 138kV, and 345kV systems. The transformers are to be delivered FOB to the Spencer Utility Site or other Denton-area substations as directed, and proposals may cover one or more requested product categories. The solicitation includes technical, quality-control, testing, warranty, and delivery requirements; responses and cost solutions must be submitted sealed through IONWAVE or by hard copy, and email submissions are not accepted. The contract is intended to run for one year, with four optional one-year renewals.

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