Transformer_RFI_v2.pdf

DEPARTMENT OF THE AIR FORCE

UNITED STATES SPACE FORCE

SPACE LAUNCH DELTA 30

SUBJECT: Request for Information (RFI) – Pad-Mount Transformers

1. Exterior finish discrepancy The SOW lists two different exterior finish requirements in separate sections:

"Entire exterior of the pad-mount transformer and terminal components shall be painted with a Munsell-Green, outdoor color-finish."

"Transformers shall be painted with light grey, ANSI Color No. 70 finish, in compliance with IEEE C57.12.28 regardless of tank and cover material."

Please confirm which finish/color governs for award — Munsell-Green or ANSI Color No. 70 light grey — as these are mutually exclusive requirements.

The government requires for pad-mounted transformer and terminal components shall be finished in Munsell Green (Munsell 7.5GY 3.2/6.7 outdoor finish). This is a VSFB electrical requirement.

2. The SOW specifies “Mineral Oil-filled: Type FR-3 Fluid.” Please confirm whether FR3 natural ester fluid or conventional non-PCB mineral oil is required.

The transformer shall be filled with FR-3 Natural Ester Fluid.

3. Please provide the missing standard referenced in the incomplete DGA requirement: “as outlined in the latest…” SOW page 3.

The manufacturer shall perform a factory Dissolved Gas Analysis (DGA) test in accordance with IEEE Std C57.12.90. Oil sampling and laboratory analysis shall be executed per ASTM D3612/D3613, with gas limits evaluated per IEEE Std C57.104. Certified DGA test results shall be submitted to the Owner prior to equipment shipment.

4. Please confirm the required primary and secondary winding configurations, BIL ratings, phase displacement/vector group, and impedance values for each transformer.

1. Primary Winding Configuration & BIL Rating (All Items):

a. 12,000V and 12,470V Primary (Items 1–9): 3-wire Delta primary connection, 95 kV BIL.

2. Secondary Winding Configurations, BIL Ratings & Vector Group:

a. 120/208Y Secondary (Items 1, 4, 7): 4-wire Wye-Grounded secondary, 30 kV BIL, Dyn1 vector group (-30° displacement).

b. 277/480Y Secondary (Items 2, 5, 6, 8, 9): 4-wire Wye-Grounded secondary, 30 kV BIL, Dyn1 vector group (-30° displacement).

c. 120/240V Secondary (Item 3) : 4-wire Delta secondary with center-tapped high-leg on one phase, 30 kV BIL, Dd0 vector group (0° displacement).

All Units (225 kVA to 750 kVA): Nominal 4.5% to 5.75% in accordance with standard IEEE C57.12.34 manufacturing tolerances.

5. For CLIN 0003, please confirm the exact three-phase 120/240V secondary configuration, including whether a high-leg delta configuration is required.

The secondary winding shall be connected in Delta with one phase winding center-tapped and grounded to supply 120V phase-to-neutral on two legs, 240V phase-to-phase across all three phases, and approximately 208V high-leg phase-to-neutral on the third phase. High leg conductor shall be factory-identified per NEC Article 110.15/230.56.

6. Is radial feed mandatory, or may vendors quote loop-feed transformers for Government approval?

Radial feed is not mandatory. Vendors may quote loop feed transformers for government review and approval.

7. FAR 52.219-33 / Nonmanufacturer Rule The RFQ is a total small-business set-aside and incorporates FAR 52.219-33. Has SBA issued any class or individual nonmanufacturer-rule waiver applicable to the transformers in this acquisition? If no waiver applies, please confirm that a small-business prime may satisfy the requirement by furnishing end items manufactured or produced in the United States by one or more qualifying small-business manufacturers under NAICS 335311. If different qualifying small-business manufacturers are used for different CLINs, is that acceptable provided each applicable end item satisfies the clause?

The Nonmanufacturer Rule applies and must qualify as small business under the NAICS 335311.

Yes, different small-business manufacturers for different CLINs are acceptable.

8. Partial quotations / partial awards

The RFQ states that the Government reserves the right to award some or all line items. Will quotations that price only a subset of the nine CLINs be considered for award, or must an offeror quote all CLINs to be eligible for evaluation?

An offeror must quote all CLINs to be eligible for evaluation/award.

9. Delivery schedule

Is there a mandatory required-delivery date for all thirteen units? If not, may offerors propose staggered deliveries by CLIN/unit based on manufacturer production availability, with the proposed delivery schedule evaluated under the stated delivery factor?

There is no single mandatory required-delivery date for all thirteen (13) units simultaneously.

Offerors may propose staggered deliveries by CLIN/unit based on manufacturer production availability and lead times.

However, all units must be delivered no later than 24 weeks after contract award. Delivery schedules will be evaluated under the stated delivery evaluation factor.

10. Could you please provide the manufacturer/brand and model of the pad-mounted transformers previously supplied for the same requirement/project?

Cooper, ABB/Hitachi, Eaton.

11. Is the contractor responsible for unloading and placing the transformers at Building 11439, or will the Government provide unloading equipment?

The Government will inspect all units while they are still on the carrier vehicle; undamaged units that pass inspection will be offloaded and placed by the Government using Government-provided equipment. However, any transformer exhibiting shipping damage or non-conformance will not be accepted or offloaded, and the risk of loss, removal, and replacement remains entirely with the contractor.

12. The electrical requirements appear to conflict. Specifically the two bullets below:

• All stainless-steel construction (includes tank, cabinet, base, radiators, fasteners, hinges, etc.), stainless steel grade shall be 304L or 316L

• Mild steel high-voltage/low-voltage compartment barriers.

Mild steel is not permitted.

13. Would a remanufactured or rebuilt transformer be acceptable for this requirement, provided that it fully meets all specified technical, performance, testing, and applicable regulatory requirements?

No. Remanufactured or rebuilt transformers are not acceptable.

14. Would a U.S. small-business prime contractor be eligible to offer transformers manufactured in the People's Republic of China, provided the country of origin is properly disclosed in the quotation?

Reference R-DFARS 252.225-7002 for a list of qualifying country sources.

15. The RFQ requires a completed FAR 52.212-3 with the quotation, but Attachment 3 does not contain the full form. Will current SAM representations and certifications satisfy this requirement?

SAM.gov representations and certifications will suffice.

16. Any requirements not fully stated in the SOW, including vector group/winding connection, impedance and tolerance, BIL/insulation levels, tap range and steps, loss/efficiency guarantees, noise limits, enclosure details, accessories/monitoring, routine/type/FAT testing, warranty, etc.

All technical, administrative, and testing parameters not explicitly detailed in the Statement of Work shall default to standard manufacturer commercial designs and testing procedures. This includes compliance with U.S. Department of Energy efficiency standards, standard sound levels, routine factory acceptance testing, and standard commercial warranty coverage

17. Will the Government accept Windings in Aluminum in lieu of Copper?

Per technical specifications, both the high and low voltage windings must strictly be copper with no substitutions allowed.