| normal and an emergency power source. The Main Control Console in the EOS additionally has a power source selector switch which will allow the existing automation system to be fed from the 18kVA UPS, a regulated power source or emergency power source. The existing propulsion SCR controls are fed from the 18kVA UPS. The new Propulsion Control System shall be fed from the 18kVA UPS via two separate feeder breakers (see Appendix G for details). Preliminary meetings with the USCG and ABS indicate that the existing system in general meets their requirements. 1.C.5 Equipment to be retained Some of the existing equipment on the MCC shall be retained and reused with the replacement system. A list of these items is located in Appendix A. This equipment is being retained as it is supportable and/or part of an existing system that will not be modified. Other equipment, such as the controls and indicators on the propulsion local control panel, can be retained by the contractor on the replacement system. Equipment that the contractor wants to retain must be approved by Military Sealift Command in advance. Equipment that will be retained will not be available for use during the factory mock-up or factory acceptance testing as the equipment will remain in use on the vessel until the start of the installation process. 1.C. 6 Console Mock-Up In order to minimize the shipboard installation time the contractor shall be required to build a full scale mock-up of the Main Control Console (MCC) at their facility. The console mock-up shall be used to build pre-wired panels and desktops to ensure that they will fit properly into the existing ship’s MCC. All panels shall be pre-fabricated with wiring harnesses/terminations to mate up to the existing cables and for internal interconnection. 1.C.7 Main Generator Cylinder Temperature Thermocouples (see Appendix D) The existing five (5) main generator diesel engines have thermocouple inputs to the existing automation system for each of their 20 cylinders plus one combined exhaust manifold temperature. The existing system shall be replaced as described in Appendix D. The existing system will be incompatible with the new system and has many operational problems. 1.C.8 Independent Control and Monitoring Systems (see Appendix E) Due to the inflexibility of the existing automation system, there have been a number of independent alarm and control panels added inside the EOS. The contractor shall integrate these into the new Automation System as described in Appendix E. D. SCR Drives (see Appendix B) There are 14 existing SCR drives that provide power to the propulsion motors (2) and thruster motors (4). Up to five (5) SCR drives can be assigned to each propulsion motor and one to each thruster motor. The existing assignment configuration shall be retained. 1.D.1 SCR bridges and Electronics Replace the existing analog controlled SCR drives (power conversion bridges and control electronics) with new digital controlled SCR drives. The drives must fit in the existing SCR enclosures with no major changes to the DC power cabling or the propulsion switchboard bus work. 1.D.2 Not Used 1.D.3 Field Exciters There are three (3) sets of existing exciters, one (1) set for the propulsion motors and two (2) sets of thruster motor exciters for the bow and stern thrusters. Each set contains three (3) exciters, one assigned to each motor in the set and one standby exciter which can be assigned to either motor in the set. The replacement field exciters shall be configured the same as the existing exciters with the same assignment capability. Replacement exciters shall however be full reversing regenerative bridges to allow for motor reversal. 1.D.4 Onboard SCR Ship Test The contractor shall be responsible for performing an onboard ship test of a replacement SCR unit. The test will require a complete SCR drive, field exciter and a dummy load to be temporarily installed on the vessel. The system shall be temporarily connected to the vessel’s propulsion switchboard bus and must operate through its full range with the vessel’s propulsion thrusters and mission systems in operation. This is to verify that the replacement SCR drive and field exciter electronics will function under the anticipated harmonic distortion (42% THD). It shall be the contractor’s responsibility to provide all equipment required to perform the test as well as installation and removal of the equipment. The contractor shall perform the test based on a test plan that is to be provided to MSC for approval. 1.D.5 SCR Enclosure Mock-Up The contractor will be required to build a full scale mock-up of one SCR enclosure (SCR power bridges and control sections). This is to ensure that the equipment will fit properly into the ship’s SCR enclosures. 1.D.6 SCR Testing Multiple levels of SCR testing shall be required; ? SCR Enclosure Mock-up (one unit only) ? SCR Factory Tests (to meet ABS/USCG requirements) ? SCR shipboard test ? Combined Factory Acceptance Testing E. Combined Factory Acceptance Testing In order to minimize the installation and commissioning time a combined factory acceptance test shall be performed by the contractor. This combined test shall include the complete Automation and Propulsion System hardware and software. This shall include, but not be limited to; ? MCC console mock-up ? Propulsion local control panel equipment ? All SCR unit controls ? All field exciter controls ? All remote panels/equipment provided by the contractor Note the existing equipment that will be re-used will not be available for the Combined Factory Acceptance Test. The contractor shall however be responsible for demonstrating the interfaces (both mechanical and electrical) to this equipment during the Combined Factory Acceptance Test. 2. Scope of Work: The contractor shall provide: A. Detailed Design (Base Contract, CLIN 0001) 2.A.1 All engineering and drawings 2.A.2 System and hardware that meets the requirements of the ABS Rules for Building and Classing Steel Vessels, USCG 46 CFR Subchapter “J” and IEEE Standard 45. 2.A.3 Detailed design verification shipcheck. This shipcheck shall be performed by the contractor after contract award to gather all of the information required to complete the detailed design and installation drawings. The time and location of the shipcheck shall be determined by the ship’s schedule. 2.A.4 Documentation to support the installation of the new equipment. 2.A.5 Tech manuals for new equipment and systems. Technical Manuals are to be ship specific commercial manuals. 2.A.6 Tech manual inserts for revised wiring of existing equipment. 2.A.7 List of recommend spares for 30 days, one year and 5 years. List shall contain at a minimum, one (1) of each electronic module or printed circuit board used. 2.A.8 List of special tools and test equipment required for onboard diagnostics and maintenance B. Fabrication and Factory Acceptance Testing (Option 1, CLIN 1001) 2.B.1 All hardware and software. 2.B.2 Full scale mock-up and combined factory testing as approved by the government, ABS and USCG. 2.B.3 Onboard SCR test during ship operations. C. Installation, Testing and Trials (Option 2, CLIN 2001) 2.C.1 Refurbish existing equipment as noted in this specification. 2.C.2 Rip-out and removal of the existing equipment from the vessel. The existing equipment is to be turned over to MSC after removal from the vessel. 2.C.3 Installation of all equipment onboard the vessel, including cabling, bulkhead penetrations, and foundations. The EOS is enclosed by A-60 rated bulkheads and decks. 2.C.4 Proof of satisfactorily performance of all equipment and systems during sea trials. 2.C.5 Technical support and troubleshooting for propulsion sea trials and acceptance sea trials. 2.C.6 Crew operational and maintenance training, including 30 day ship rider on vessel’s first mission (worldwide location). Ship rider must be a US citizen with a secret clearance. 2.C.7 As-Built Technical Manuals and Drawings D. Shipboard Spare Parts and Logistics Support (Option 3, CLIN 3001) 2.D.1 Provide one ship set of onboard spare parts based on contractor’s list of recommended spare parts. 2.D.2 |
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