Sonoma County Supplier Systems #0000002207

Sonoma County procurement for one 500 kVA outdoor pad-mounted transformer

The County of Sonoma is seeking one specialized 500 kVA pad-mounted transformer for its Youth Crisis Center at Los Guilicos. - Government buyer: County of Sonoma, Purchasing Division / SPI Purchasing; procurement contact listed as Soms Suvanaseng. No sub-agency is identified. - OEMs and vendors: No transformer manufacturer, OEM, or supplier is named. Bidders must identify the proposed manufacturer, model, and catalog number. - Product requested: One new, factory-assembled and factory-tested, three-phase, 60 Hz outdoor pad-mounted transformer; no part number is provided. - Electrical configuration: 12,470 V delta primary and 480Y/277 V secondary; copper windings; less-flammable seed-oil insulating fluid; 95 kV primary BIL, 30 kV secondary BIL, and 5.75% impedance with ±7.5% tolerance. - Performance: 65°C temperature rise, 120°C insulation class, two 2.5% full-capacity taps above and below nominal, operation up to 3,300 feet altitude, at least 99.35% efficiency at 50% load, and sound level no greater than 56 dB. - Configuration and components: dead-front loop-feed design; six one-piece 15 kV-class 600 A primary bushings; six 15 kV distribution-class MOV surge arresters; four-position 600 A T-blade under-oil switch; and no internal fusing. - Includes specified gauges, valves, drain and sampling provisions, pressure-relief equipment, nitrogen test/fill provisions and blanket, tamper-resistant fasteners, permanent nameplate, and outdoor-suitable finish. - Standards and submissions: Applicable IEEE C57, UL, and federal energy-efficiency requirements apply. Bidders must provide technical specifications, drawings, compliance documentation, certified dimensions, weight and center-of-gravity information, factory testing and a certified test report, warranty information, and disclosure of exceptions. - Delivery and scope: Equipment-only procurement, including accessories, documentation, testing, shipment coordination, and delivery FOB destination, freight prepaid. Installation and field construction are excluded. Delivery timing is specified in the solicitation; no ongoing service term or option period is stated. - Notable conditions: Substitute or alternate products are not accepted. Award is based on the lowest responsive and responsible bid that meets or exceeds the specifications.

Description

The County of Sonoma is soliciting bids to furnish and deliver one new, factory-assembled and factory-tested 500 kVA three-phase outdoor pad-mounted transformer for the Youth Crisis Center at Los Guilicos in Santa Rosa, California. This is an equipment-only procurement; installation and field construction are excluded. The transformer must meet the stated minimum electrical, performance, accessory, standards, and testing requirements, and the bid must include required technical submittals and documentation. Delivery is F.O.B. destination, freight prepaid, and award will be made to the lowest responsive and responsible bidder meeting or exceeding the specifications.

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