Attach 1_SOW.pdf

v2.5 – FEBRUARY2023

PR #

STATEMENT OF WORK

(SOW)

45 KVA 3-PHASE POWER TRANSFORMER FOR SEAWOLF CLASS

N66604-23-SIMACQ-NPT-15-0111

1.0 Background

The Naval Undersea Warfare Center (NUWC), Division Newport, Rhode Island is seeking vendor proposals in order to procure one power transformer for SEAWOLF-class submarine applications.

1.1 Places of Performance. Design, Fabrication, and Factory Acceptance Testing (FAT) will be performed at the contractor’s facility or at a mutually acceptable facility. The government reserves the right to witness and/or obtain FAT test results. Shock qualification testing will be performed in conjunction with the government, either in Newport, RI or NSWC, Philadelphia, PA, or at a mutually acceptable private testing facility.

1.2 Authorized Users. N/A.

1.3 Sponsors. This effort will be funded by PMS-401 and PMS-394 (Advanced

Submarine Systems)

1.4 Types of Funding. Direct Cite PMS394, Direct Cite PMS401.

2.0 Scope

The Naval Undersea Warfare Center, Division Newport, Rhode Island is seeking vendor proposals in order to procure one (1) three phase 45 KVA power transformers to accommodate unforeseen growth in electrical power demand for SEAWOLF-class submarine applications.

The transformers will be continuous duty devices with the electrical characteristics listed below and will be required to meet Grade A shock requirements per MIL-S-901D as well as the requirements of SEAWOLF-Class Transformer Specification PSSSN21C-941.

As part of their proposal process, qualified vendors will demonstrate the ability to design and fabricate power transformers for U.S. Navy shipboard applications. Additionally, responding vendors will be furnished with support documentation containing Controlled Unclassified Information (CUI), formerly referred to as For Official Use Only (FOUO). Qualified contractors will have the capability to handle CUI documents in accordance with DoDI 5200.48.

Interested vendors will be furnished with the applicable ship specifications, relevant drawings and test data. Vendors will be required to develop their own Factory Acceptance Tests in accordance with section 4 and test procedures which will be subject to review of, and approval by the government. The transformer will be required to undergo (and survive) Grade A medium weight shock qualification testing at Naval Undersea Warfare Center, Division Newport, Rhode Island. The vendor will provide logistical and technical support for this test.

In the event of a shock test failure, the government will assure the vendor is provided with the relevant test data. The vendor will perform an analysis and redesign of the unit to correct the failures and redesign will need to be completed within 3 months after initial EQT results. The government will schedule a follow-up shock test to prove the design.

3.0 Applicable Documents

The contractor shall perform the tasking required in Section 4.0 in accordance with the below Applicable Documents.

3.1 DoD Issuances

3.1.1 DoDI 5200.48; Controlled Unclassified Information (CUI), 6 March 2020

3.2 Government Issuances

3.2.1 PSSSN21C-94; Product Specification, Transformers, Power, Dry-Type, 60-Hertz (Hz)

Three Phase, Nuclear High Speed Attack Submarines, Seawolf Class, General Specifications For, September 1987

3.2.2 MIL-S-901D; Shock Tests, H.I. (High-Impact) Shipboard Machinery, Equipment, and Systems, Requirements For, 20-Jun-2017

3.2.3 MIL-STD-740; Airborne and Structureborne Noise Measurements and Acceptance Criteria of Shipboard Equipment

3.2.4 MIL-STD-167-1A; Department of Defense Test Method Standard Mechanical Vibrations of Shipboard Equipment, November 2005

3.2.5 MIL-DTL-2036; Enclosures for Electric and Electronic Equipment, Naval Shipboard, 4 June 2019

3.2.6 MIL-STD-108; Definitions of and Basic Requirements for Electrical and Electronic Equipment

3.2.7 SEAWOLF Class Project Peculiar Document (PPD) No. 802-6335704; Shock Tests, H.I.

(High Impact), Shipboard Machinery, Equipment and Systems, Requirements for, 1 May

3.3 Industry Standards

3.3.1 Vendors are encouraged to follow industry best practices to the maximum extent possible without violating any of the standards in 3.1 or 3.2.

4.0 Technical Requirements

NUWC Division Newport, working in conjunction with NAVSEA 05Z32 Engineering Manager in Support of Shipboard Electrical Interfaces Naval Surface Warfare Center, Philadelphia Division (NSWCPD), have developed technical requirements contained in this section. The vendor shall produce one three-phase dry-type power transformers in accordance with SEAWOLF specification PSSSN21C-94 meeting the following requirements:

4.1 KVA capacity:

The KVA capacity of the transformers shall be 45 KVA at 50°C ambient temperature.

4.2 Voltage rating:

The voltage rating of the transformers shall be 450V primary winding, 120V secondary winding.

4.3 Number of Phases:

The transformers shall be three-phase, with the configuration denoted in 4.5.

4.4 Frequency:

The transformer frequency shall be 60 Hz.

4.5 Winding configuration.

The transformers shall be configured in the delta-to-delta configuration.

4.6 Insulation type:

The transformers shall be dry type transformers.

4.7 Cooling:

Natural convection shall be used to cool the transformers.

4.8 Duty:

The transformers shall operate continuously as described herein.

4.9 Maximum Temp Rise:

Maximum winding temperature rise of the transformers shall be 80°C; maximum core temperature rise shall be 90°C.

4.10 Maximum Ambient Temp:

The transformers shall operate, as described herein, at a maximum ambient temperature of 50°C.

4.11 Weight:

The weight of the individual transformers shall not exceed 640 pounds per Table A of PSSSN21C-94.

4.12 Volume:

The volume of the transformers shall not exceed 9,960 cubic inches per Table A of PSSSN21C-94.

4.13 Losses:

Transformer losses shall not exceed 160 watts (no load) and 870 watts (total) per Table A of PSSSN21C-94.

4.14 Impedance:

Transformer impedance shall have a tolerance of +/- 7.5% of the 2% value specified in Table A of PSSSN21C-94.

4.15 Exciting current:

Transformer exciting current shall not exceed 5% per Table A of PSSSN21C-94.

4.16 Peak inrush current:

Transformer peek inrush current shall not exceed 19 times peak rated primary current per Table A of PSSSN21C-94.

4.17 Cable compartment location:

The cable compartment shall be located at the top of the transformer enclosure.

4.18 Mounting:

The transformers shall be deck mounted and adhere to the dimensions per Figure 3 of PSSSN21C-94 for a 45 KVA transformer.

4.19 Dimensions:

Overall size of transformers shall be limited to the dimensions in Table B of PSSSN21C-94 for 45 KVA: Depth 14.0 inches. Height 21.0 inches, Width 28.0 inches.

4.20 Structureborne Noise:

The transformer structureborne noise shall conform to the acceptance criteria of Figure 4 of PSSSN21C-94 per MIL-STD-740-2.

4.21 Airborne Noise:

The transformer airborne noise shall conform to the limits of Table H of PSSSN21C-94 per MIL-STD-740-1.

4.22 Vibration:

Test per MIL-STD-167-1A, 4 – 14 Hz.

4.23 Shock:

In accordance with Grade A shock testing, MIL-S-901D. Nine blows are required for MWSM testing: 3 blows per direction (half hammer height/full 3” table travel, full hammer height/full 3” table travel, full hammer height/half 1.5” table travel). Hammer height is based on weight on the table.

4.23.1 Vertical:

3 blows, conducted on 25 Hz Ballasted Spring Deck Fixture (BSDF)

4.23.2 Side-over:

3 blows, inclined 90 degrees side-over

4.23.3 Front-over:

3 blows, inclined 30 degrees front-over

4.24 Shock Test Mounting:

The transformers shall be mounted on the Medium-weight shock machine in accordance with Figures 14 or 15 of SEAWOLF Class PPD No. 802-63357041.

4.25 Enclosure:

Drip proof in accordance with class I of MIL-E-2036 and MIL-STD-108

4.26 Group A Tests:

Both transformers shall be subjected to the group A tests specified in Table E of

PSSSN21C-94.

4.27 Qualification Tests:

The contractor shall perform qualification testing of one transformer in accordance with Table E of PSSSN21C-94.

5.0 Progress Reports

The Contractor shall prepare a Contractor’s Status Report that indicates the progress of work, status of the program(s), and existing or potential problem areas for all assigned tasks. The Contractor shall submit the Contract Status Report for the same timeframe as each invoice submitted in the Wide Area Workflow (WAWF) Module of the Procurement Integrated Enterprise Environment (PIEE).

6.0 Government Furnished Information

The following Government Furnished Information (GFI) will be made available under this contract/order (Insert Contract Number).

6.1 PSSSN21C-94; Product Specification, Transformers, Power, Dry-Type, 60-Hertz

(Hz) Three Phase, Nuclear High Speed Attack Submarines, Seawolf Class, General Specifications For, September 1987

6.2 SEAWOLF Class Project Peculiar Document (PPD) No. 802-6335704; Shock Tests, H.I. (High Impact), Shipboard Machinery, Equipment and Systems, Requirements for, 1 May 1987

6.3 L3 Communications Drawing No. 29545 Rev. C, Transformer, Power, Type-45KVA, 3-Phase, 60HZ, 80°c Rise

6.4 Hi-Test Report No. 629, Medium Weight Impact Shock Testing of 45KVA, 3 Phase Transformer Manufactured by Magnetek Power Magnetics, 1 November 1994

6.5 Wells, P.M., NUWC Division Newport, RI Ranges, Engineering, and Analysis Department; High Impact Shock Test Report for the L3 Communications 45KVA Transformer, 5 August 2011

7.0 Quality Surveillance and Performance Standards

The Government will conduct quality surveillance via various methods including formal and informal meetings, review of technical reports, review of monthly progress reports, and review of deliverables. Contractor performance will be evaluated in the areas of technical quality, schedule/timeliness, management, and regulatory compliance as follows:

Technical Quality: The government will evaluate technical quality using the criteria defined in the CDRL, in applicable documents in section 3.0, section 4.0 and GFI in Section 6.0.

Schedule/Timeliness: The government will evaluate the contractor’s ability to meet negotiated milestones and delivery schedules.

Management: The government will evaluate the contractor’s ability to integrate and coordinate all activities needed to execute the contract.

Regulatory Compliance: The government will evaluate the contractor’s compliance with the terms and conditions of the contract relating to applicable regulations and codes.

8.0 Exception From Information and Communication Technology Accessibility

Requirements

The Government has determined that this procurement is an exception to the Information and Communication Technology (ICT) Accessibility Standards (36 C.F.R. § 1194.3 - Chapter 2 E202 General Exceptions of Section 50 Refresh). Notwithstanding that an exception exists, the Contractor may furnish items or services provided under this contract that comply with the ICT Accessibility Standards (36 C.F.R. § 1194- Chapters/WCAG to Section 508 Refresh).