XFR POL 00560

Burlington Electric Department (BED) is requesting quotations for single phase, 60 Hz, mineral oil immersed, self-cooled, 65-degree C rise, overhead type distribution transformers. The RFQ specifies a quantity of 12 units with a nominal high voltage rating of 13800 Grd Y/7970 volts at 95 kV BIL, and low voltage options of either 120/240 volts, 277 volts, or 240/480 volts at 30 kV BIL. The transformers must comply with ANSI/IEEE standards C57.12.00, C57.12.20, C57.12.31, C57.12.90, and C57.91. Impedance voltage must be between 1.60 percent and 2.25 percent for units rated 15-167 kVA.

All transformers shall undergo comprehensive testing including no-load losses at 20°C/100 percent voltage, total losses at 85°C/100 percent voltage, percent impedance at 85°C, and exciting current at 100 percent rated voltage. Manufacturers must provide guaranteed average and maximum loss values, which will be used in BED's loss evaluation formula. Full wave voltage impulse testing and short circuit criteria verification per ANSI/IEEE standards are required. Complete certified test reports by serial number must be delivered prior to shipment for BED approval. The nameplate must be permanently marked on corrosion-resistant material, and the transformer and oil must be certified PCB-free.

Delivery must be made FOB destination with freight allowed to BED's dock. The delivery deadline is no later than February 6, 2026 at 5:00 PM EST. Quotations are due as soon as possible and must be uploaded to BED's secure website. All quotations must include outline drawings showing transformer dimensions, one-line diagrams, average percent positive impedance and X/R values, percent exciting current, average and guaranteed maximum total load losses and no-load losses, tank corrosion minimization methods, and warranty information with location of nearest manufacturer service shop. Any exceptions to specifications must be documented in writing and specifically granted by BED. Failure to meet quoted losses may result in financial penalties determined via BED's loss evaluation formula.