0307_B_MOTOR_CONTROL_CENTER_M05_ALTERNATE_POWER_SOURCE_(T-ALT_370).docx

USNS CARL BRASHEAR

(T-AKE 7)

MOTOR CONTROL CENTER M05 ALTERNATE POWER SOURCE (T-ALT 370)

1.0 ABSTRACT

This item describes the installation of a Manual Transfer Switch (MTS) switch that provides an alternate source of power for motor control center (MCC) M05.

2.0 REFERENCES

2.1 MSC Drawing No. 320-8393000, Lewis & Clark Class Motor Control Center M05 MTS Installation.

3.0 ITEM LOCATION/QUANTITY/DESCRIPTION

3.1 Locations/Quantity

3.1.1 Locations: Sewage Treatment Room (3-75-6) and Engineer Operating Station (3-66-2).

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIALS/SERVICES:

5.0 NOTES

5.1 The contractor and all subcontractors regardless of tier shall consult the General Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors regardless of tier must comply with the requirements of all applicable GTRs including but not limited to GTRs 1 through 7 and 23.

5.2 The contractor and all subcontractors regardless of tier are advised to review other work items under this contract, to determine their effect on the work required under this work item. Many of the definitions relating to performance of this work item are found in Work Item 001.

5.3 This class of ships contains High Voltage (HV) electrical systems (6.6 kV). The contractor and subcontractors shall obey all posted and verbal instructions regarding safety and exclusion from High Voltage areas. At no time shall a contractor or subcontractor approach, work on, or enter a High Voltage area without proper authorization.

5.4 THE T-AKE 1 CLASS ELECTRICAL COLOR CODING DOES NOT FOLLOW CONSISTENT COLOR SCHEME. THE SHIP IS KNOWN TO HAVE CURRENT CARRYING CONDUCTORS COLORED GREEN, BLUE, BLACK AND WHITE. THE CONTRACTOR SHALL ASSUME ALL ELECTRICAL CABLES ARE ENERGIZED UNTIL TESTED OTHERWISE. THE CONTRACTOR SHALL TEST ALL ELECTRICAL CABLES TO ENSURE THEY ARE DE-ENERGIZED PRIOR TO WORK ON THE ITEM.

6.0 QUALITY ASSURANCE REQUIREMENTS: None additional.

7.0 STATEMENT OF WORK

7.1 Arrangement/Outfitting: None additional.

7.2 Structural: Install MTS, near MCC M05 using manufacturer’s instructions as guidance. Install location shall be approved by Military Sealift Command Representative (MSC REP).

7.3 Mechanical Fluids: None additional.

7.4 Electrical

7.4.1 Removals

Disconnect existing cable SS2-15 from MCC M05 and pull back for re-connection and termination to the MTS, using reference 2.1 as guidance.

7.4.2 Installations

a. Re-connect power cable SS2-15 to normal power terminal of MTS, using Reference 2.1 as guidance.

b. Install EATON MTS (or equal), with the following salient characteristics, using reference 2.1 as guidance.

· 200 ampere rating

· Withstand 30kA spec/10kA any

· 60 Hz, 480 VAC

· 3 Pole

· Instantaneous phase failure operation

· NEMA 3R Enclosure

c. Connect MTS to MCC M05 and circuit SS1-54, using Reference 2.1 as guidance.

d. MSC REP shall approve installation location(s) before work begins.

e. Cable lengths are approximate only, Contractor shall determine actual length(s) at the time of installation.

7.5 Electronics: None additional

7.6 Preparation of Drawings

7.6.1 Any deviations from drawing shall be noted on Reference 2.1.1 via redlines. An electronic .dwg and .pdf version shall be provided to the MSC REP.

7.6.2 Upon completion, installation shall be inspected and tested to the satisfaction of the Chief Engineer, Port Engineer and/or regulatory bodies.

7.7 Testing and Inspecting

a. Designated MSC REP to inspect and approve installation prior to power application.

b. Upon completion, installation shall be inspected and tested to the satisfaction of the MSCREP.

c. End-to-end continuity and electrical insulation resistance test on new, modified, overhauled, or repaired system cables shall be performed. The Military Sealift Command Norfolk Representative (MSCREP) shall be immediately notified if insulation values of equipment or cables are less than 1 Mega Ohm (MΩ). Do not test electronic equipment.

7.8 Painting

7.6.1 Paint all new and disturbed surfaces to match surrounding surfaces.

7.9 Marking

7.7.1 Install name plates, notices and markings for all new and modified systems.

7.10 Manufacturer's Representative: None

8.0 GENERAL REQUIREMENTS: None additional.

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