Section_C-1_Specification_Ship_Service_-_Revised.pdf

Department of Homeland Security (DHS)

United States Coast Guard (USCG)

270’ MEDIUM ENDURANCE CUTTER (WMEC)

SERVICE LIFE EXTENSION (SLEP)

ELECTRICAL POWER GENERATION

70Z02319RAVS03000

Attachment C-1

TECHNICAL SPECIFICATION:

SHIP SERVICE & EMERGENCY DIESEL

GENERATOR SETS

September 11, 2019

Attachment C-1: TECHNICAL SPECIFICATION: 270’ WMEC SLEP SSDG & EDG

Table of Contents

1.0 Shipboard Service Diesel Generator and Emergency Diesel Generator Set

1.1 General Requirements

1.2 Generator Set Mounting

1.3 Piping

1.4 Fasteners

1.5 Electric Cables

1.6 Electric Enclosures

1.7 Starting and Operational Ambient Air

1.8 Shutdown

2.0 Diesel Engine (Prime Mover)

2.1 Rating

2.2 Emissions

2.3 Manual Rotation

2.4 Lubricating Oil System

2.5 Cooling Water System

2.6 Fuel Oil System

2.7 Starting Air System for Shipboard Service Diesel Generator (SSDG) Sets

2.8 Electrical Start for Emergency Diesel Generator (EDG) Sets

2.9 Turbochargers

2.10 Exhaust System

2.11 Engine Regulation and Protection

2.12 Emergency Shutdowns

2.13 Crankshaft

2.14 Guards and Shields

2.15 Access and Inspection Covers

2.16 Designation and Marking

3.0 Generators

3.1 General

3.2 Generator Cooling System

3.3 Generator Heaters

3.4 Excitation

3.5 Voltage Control

3.6 Load Control

3.7 Parallel Operation

3.8 Insulation Resistance

3.9 Designation and Marking

4.0 Coast Guard Machinery Control System (CGMCS)

4.1 General

4.2 Control, Monitoring, & Alarm

1.0 Shipboard Service Diesel Generator and Emergency Diesel Generator Set

1.1 General Requirements

1.1.1 Guiding Requirements: The electrical power generation components specified within this Spec shall be designed in accordance with 46 CFR and IEEE Recommended Practice for Electrical Installation on Shipboard Standard 45 (IEEE Std 45). The diesel engine (prime mover) shall be designed in accordance with ABS Steel Vessel Rules, 2018 (ABS-SVR).

1.1.2 Generator Set Specifications: The individual generator sets (ship service or emergency) shall have identical power ratings and shall produce Type I power in accordance with MIL-STD-1399.

Generator sets within the range of 475 kW to 498 kW are anticipated to have the least impact to switchboard configuration. Generator sets may have maximum power ratings up to 575 kW if

Contractor can safely upgrade the switchboards and electrical components within existing dimensional constraints. If required, the electrical output may be regulated or limited through local controls to minimize the impact to the electrical distribution system. Power shall be supplied at 450

Volts ungrounded 3 phase, 60 Hz at 0.8 lagging power factor.

Output Power 475ekW - 575ekW

Voltage 450 Volts

Phases Ungrounded 3 Phase

Frequency 60 Hz

Power Factor 0.8

Speed (Maximum) 1800 rpm

1.1.3 Generator Set Size Limitations: The entire diesel generator set including all accessories mounted on a common skid shall fit into the existing dimensional envelope. The existing envelope allows for an

18 to 24 inch maintenance envelope in all directions. Diesel generator sets that exceed any of the dimensions below may not be feasible for installation on the cutter:

Length Width Height

Diesel Generator Set 147 inches 62 inches 81 inches

1.1.4 Marine Use: The diesel generator sets shall be designed and approved for marine use and have a documented service record of at least five years of operation, with at least one generator set having a documented two years or 5,000 hours of marine service. Documented service shall be for the full generator set in proposed configuration.

1.1.5 Vibration: All equipment, components, parts and accessories shall be capable of withstanding normal shipboard vibrations. All machinery and equipment units shall be designed to meet the following requirements:

1.1.5.1 Environmental Vibration: Shall meet the environmental vibration requirements as defined in MIL-STD-167-1A, Type I vibration up to and including 50 Hz. ANSI S2.26 is an acceptable alternative for MIL-STD-167-1A, Type I requirements and testing. Exception to this requirement may be allowed for equipment that has ABS Type Approval and/or been previously installed on Coast Guard, Naval, or Commercial vessels.

1.1.5.2 Internally Excited Vibration: Rotating commercial marine equipment shall meet the balance requirements of MIL-STD-167-1A, Type II. ISO 21940-11 is an acceptable alternative for MIL-STD-167-1A, Type II requirements and testing. If ISO 21940-11 is used, the generator set shall have a balance grade of G2.5, or better.

1.1.5.3 Torsional Vibration: Shall meet the torsional vibration requirements as defined in ANSI

S2.27.

1.1.6 Noise. Sound level emitted from generator sets shall not exceed 115 dBA. Noise measurements shall be taken at head level, in the operational orientations defined in MIL-STD-1474E Table II.

1.1.7 EMI. The complete diesel generator set shall meet the Electromagnetic Interference (EMI) control requirements specified in MIL-STD-461, as applicable for surface ships, equipment located below deck.

1.1.8 Painting. Generator sets shall be painted in the same manner as for commercial delivery. Internal oil wetted surfaces shall not be painted. No paint, plastic or zinc coating shall be applied to the interior of gear housings, lubricating oil sumps, or any other interior surfaces that will be in contact with lubricating fuel or hydraulic oil.

1.1.9 Interface Commonality. All mechanical interfaces shall use imperial sizes meeting the applicable

ANSI, SAE, JIS, or MIL standards. If imperial sizes are not standard, then the Contractor shall provide adapters. This will help avoid integration issues during installation.

1.2 Generator Set Mounting

1.2.1 Generator sets in which the generator is not mounted off of the engine crankcase shall be sub-base

(skid) mounted with a structural torque-reaction coupling directly bolted between the engine and the generator. The generator rotor shall be directly coupled to and in line with the engine crankshaft. The use of gear, belt, or chain drives for the generator shall be prohibited.

1.2.2 Sub-base (skid) mounted. Sub-base mounted generator sets shall consist of a diesel engine and generator and the attached accessories assembled and aligned as a unit on a welded steel sub base

(skid) which forms a rigid self-supporting structural unit for installation on its foundation in the ship without further stiffening or bracing.

1.2.2.1 Sub-base (skid) shall contain no pockets which can retain liquids.

1.2.2.2 Sub-base (skid) shall be arranged to provide sufficient clearance for servicing and disassembling parts such as generators, circulating pumps, air coolers, pistons, and valves without dismantling other machinery, structure, or piping.

1.2.2.3 All sub-base (skids) shall be designed and constructed so that positive and accurate alignment of equipment and components is maintained.

1.2.2.4 The rigidity of sub-base (skid) and supporting structure shall be sufficient to prevent misalignment which would interfere with operation of the machinery and equipment and to preclude excessive vibratory motion or rocking on the sub-base (skid).

1.2.3 Generator Bearings. The Contractor shall ensure that bearing loadings and speeds are within bearing manufacturer tolerance for a minimum L10 bearing life equal to the diesel engine's center section time between overhaul. Shaft and carrier diameter shall be within the bearing manufacturer tolerance. Lubrication shall be appropriate for the temperature and speed factor. Calculations shall be provided to the KO.

1.2.3.1 Single-bearing generators. Sets furnished with single bearing generators shall have the engine end of the generator shaft piloted in either the engine flywheel or the engine crankshaft.

1.2.3.2 Bearing Seals. Either integral seals or re-greasable bearings are acceptable. If integral seals are to be used, then the integral seals are to be rated for at least the number of hours between engine overhauls in accordance with routine overhaul schedule.

1.2.4 Disassembly. Generator set shall be designed such that the diesel engine and the generator can be separated and removed independently of each other. Both the diesel engine and the generator shall each have specific lifting points to allow them to be removed individually.

1.2.5 Lifting Means. Eyebolts, lugs, holes or equivalent means shall be provided to permit lifting the generator set and attached accessories as a complete unit. The diesel engine and the generator shall have provisions for lifting individually after decoupling. Eyebolts or other means of lifting the generator or diesel engine alone shall not be used for lifting the assembled generator set.

1.2.6 Resilient Mounting. Generator Set and/or alternator shall be resiliently mounted to the skid.

Resilient mounting such as steel spring type resilient vibration and noise isolation mounts are desired.

1.3 Piping

1.3.1 The engine attached piping shall be strapped and properly and adequately supported by the engine structure to minimize the effects of vibration as defined in Section 1.1.5 of this Technical

Specification.

1.3.2 Take-down joints in fuel systems shall be kept to a minimum.

1.3.3 Flanged connections to the engine and ancillary equipment piping shall be in accordance with ANSI

B16.5 (150 psi). All adapters necessary to produce Imperial-type connections (i.e. ANSI flange, SAE

J514 flare, or NPT) shall be provided by the Vendor. All interfaces with ship’s systems shall be one of these sizes.

1.3.4 Piping for jacket water, lube oil and fuel oil shall be seamless non-galvanized carbon steel complying with ASTM A-53 or stainless steel complying with A-312.

1.3.5 High pressure fuel injector tubing shall be double wall construction with a weep hole or tell-tale.

1.4 Fasteners

1.4.1 Fasteners shall not be torque to yield.

1.4.2 Threaded parts shall be in accordance with the screw thread standards of FED STD H28A or commercial equivalent. Nuts and other threaded fastenings on the engine and auxiliaries shall be secured by wire, lock washers or other means to prevent the part from working loose under operating conditions. Threaded holes in aluminum intended for bolts or studs shall have steel inserts.

1.5 Electric Cables

1.5.1 Cables and wires shall be neatly arranged on the diesel generator sets and shall be protected from heat, oil and mechanical damage. All electrical cables and equipment shall comply with 46 CFR, IEEE Standard 45 (Recommended Practice and Electrical Installation on Shipboard, 2002) and MIL-

DTL-24643C (Cables, Electrical, Low Smoke Halogen-Free, For Shipboard Use, General

Specification, 2009).

1.6 Electric Enclosures

1.6.1 Enclosures for all electrical equipment shall be rated for installation in a machinery space with 50°C temperature rating and shall comply with all requirements of NEMA 250-2008, Enclosures for

Electrical Equipment (1000 Volts Maximum) and ABS SVR.

1.7 Starting and Operational Ambient Air

1.7.1 Cold start requirement for First Article Test (FAT) is 35°F. Operating envelope is 40-122°F.

1.8 Shutdown

1.8.1 In the event of a normal or an automatic/emergency generator set shutdown, the generator set controls shall send appropriate shutdown signals to CGMCS (see Section 4.0).

1.8.2 Shutdown signals shall also be tied to shunt-trip inputs on the generator circuit breakers to open them upon shutdown.

2.0 Diesel Engine (Prime Mover)

2.1 Rating

2.1.1 The diesel engine's OEM shall make the declaration of International Organization for

Standardization (ISO) standard power. The diesel engine's declaration of power shall be ISO standard power as defined in ISO 3046-1 (Reciprocating internal combustion engines –

Performance).

2.1.2 The rated power shall be attained under the following conditions:

o Atmospheric pressure – 14.5 psia or 100 kPa o Air inlet temperature – 122 °F o Sea water inlet temperature – 28°F to 95 °F o With jacket water and lube oil at standard operating temperature.

2.2 Emissions

2.2.1 The engines shall be certified by the OEM that they comply with exhaust emission regulations of

International Maritime Organization (IMO) MARPOL (73/78) Annex VI and EPA Regulation 40

CFR 1042 (Control of Emissions from New and In-Use Marine Compression-Ignition Engines and

Vessels). Compliance shall be based on a proposed installation date of March 2021.

2.3 Manual Rotation

2.3.1 A manual barring gear shall be provided and shall be capable of rotating the engine crankshaft through a full revolution by one person.

http://www.responseboatproject.net/rbmcontract/sections/Section_J/References/References.htm#MARPOL73_78

2.4 Lubricating Oil System

2.4.1 Lubricants: The engine shall use OEM approved lubricants for engine service classification and viscosity grade. It is desired but not required for the engine to use MIL-PRF-9000 Symbol 9250

SAE 40 without jeopardizing warranty or emissions certification.

2.4.2 Oil Sump: The engine shall be supplied with an integral oil sump capable of adequately maintaining lube oil pump pickup submergence in the static and dynamic conditions listed in Section 4.3 of the

SOW.

2.4.3 Lubrication Pumps: The engine shall be equipped with one or more engine driven pumps to provide an adequate engine lubrication at all operating loads, inclinations, and speeds. If required by engine design, an electric motor driven prelube oil pump shall also be provided.

2.4.4 Lubricating Oil Coolers: Lubricating oil coolers capable of maintaining temperature of oil at the pump suction at not more than temperature prescribed by the engine OEM under any conditions of machinery operation shall be provided.

2.4.4.1 The engine lubricating oil shall be cooled by jacket water from the engine cooling water system.

2.4.4.2 Lube oil coolers shall be an integral part of the engine design.

2.4.5 Lube Oil Heater: The lube oil shall be maintained at a temperature sufficient to permit rapid starting and application of load.

2.4.6 Lube Oil Filter Assembly: The engine shall be equipped with an automatic lube oil filter assembly approved by the engine OEM. The filter assembly shall be monitored for pressure differential. A relief valve shall be provided external to the filter casing or other means shall be provided to ensure positive flow. The mechanism shall bypass oil around the filter when the pressure drop across the filter exceeds operating limits. A tee pipe fitting shall be installed in the lube oil supply line to the filter for the purpose of sampling. A ¼” sampling valve and rated above the lube oil system design pressure & temperature shall be fitted to this tee. The valve shall be capped and the cap chained to the valve.

2.4.7 Operational Make-up Oil: Provisions shall be made on the engine oil sump for measuring and adding lubricating oil to the engine while the engine is operating. A “normal” and “add” or “low oil”, mark shall be shown to indicate normal operation and the need to add.

2.4.8 Lube Oil Spinners: If spinners can be used by the new generator sets, then the preference is to utilize existing shipboard spinners on the SSDGs as shown on USCG drawing number 901-WMEC-

264-003 for A-Class cutters or 905-WMEC-264-003 for B-Class cutters. Details on the spinners are contained in the USCG Technical Publication 4692A. No spinners are currently installed with the

EDG.

2.4.9 Lube Oil Testing: Equipment and instructions for testing lube oil quality shall be provided.

(SpectroVisc Q3000 Series or equivalent.)

2.4.10 Crankcase Ventilation:

2.4.10.1 Closed Crankcase Ventilation: Shall be supplied and mounted if required by engine manufacture’s design or EPA regulations.

2.4.10.2 Crankcase Vacuum: Vacuum in the crankcase is not mandatory but is encouraged.

2.5 Cooling Water System

2.5.1 The engine shall be cooled by means of a closed, self contained, treated fresh water system in which the jacket water is circulated by means of an attached engine driven pump.

2.5.2 Seawater is currently provided by the ASW system at 145 gpm at 28°F to 95F.

2.5.3 A drain cock or other effective means for water drain off is to be provided at the lowest point of the cylinder block.

2.5.4 The engine jacket water pump drive arrangement shall prevent water leakage into the engine lubrication system. The pump shall be so mounted or provided with a continuous vent to prevent the entrapment of air. Pumps which are not self draining shall be provided with petcocks or other means of being drained completely without the use of special tools. The pumps shall be installed with the outlet horizontal or upward to prevent air binding of pump casings. The pump shall have galvanic corrosion protection.

2.5.5 After-Cooler: The cooler shall be provided with an air vent if there is a possibility of air entrapment within the cooler. Materials shall be suitable for medium used for cooling.

2.5.6 Jacket Water Cooler: The jacket water cooler shall be capable of maintaining jacket water within the manufacturers recommended range for standard conditions at all loads up to 110% rated load, when operating with sea water inlet temperatures of 28 to 95 F. Coolers shall be sized for adequate cooling up to 145 gpm of seawater.

2.5.7 Jacket Water Heater: The engine jacket water system shall be provided with electric heaters and thermostatic controls to maintain the jacket water at a temperature sufficient to allow starting and rapid acceptance of load from a shutdown condition. A flow switch in the heater control circuit shall be provided, which will de-energize the heater elements in the event of a loss of flow. Ambient compartment temperature shall be considered to be 40 F.

2.5.8 Jacket Water Expansion Tank: An external jacket water expansion tank shall be installed above the engine in the compartment. The tank shall be equipped with a gage glass. Provision shall be made for the addition of chemical treatment to the expansion tank.

2.5.9 Jacket Water Test Kit: A jacket water conditioner test kit shall be furnished with the diesel engine.

It shall be capable of indicating the inhibiter concentration level and the presence of chlorides in the cooling water.

2.6 Fuel Oil System

2.6.1 Fuel: The engine shall be capable of using commercial distillate marine fuel (ISO 8217 Grade

DMA). Diesel Engines shall be compatible with NATO F-76 Naval Distillate Fuel meeting MIL-F-

16884 as well as aircraft jet engine fuel grade JP-5 (NATO F-44) meeting Mil-DTL-5624U.

2.6.2 Connections: Connections to ship’s supply system shall be steel 37° flare fittings in accordance with

SAE J514.

2.6.3 Prohibited Materials: Magnesium alloys, zinc, and aluminum parts shall not be used in the fuel system.

2.6.4 Duplex Pressure Gauge: A duplex pressure gauge shall be furnished to indicate the pressure drop across each filter assembly. The fuel system shall be capable of operating with a 10 foot static suction lift.

2.6.5 Duplex Strainer: A duplex strainer, which can be changed without interrupting the fuel supply to the engine, shall be installed on the suction side of the supply pump if the primary filter is on the discharge side of the pump and shall be fitted with drain valves. If the primary filter is on the suction side of the pump, a final filter shall be installed after the pump discharge. A differential pressure gauge shall be installed on each filter.

2.7 Starting Air System for Shipboard Service Diesel Generator (SSDG) Sets

2.7.1 The starting of the Shipboard Service Diesel Generator sets shall be accomplished by the existing shipboard compressed air starting system.

2.7.2 The compressed air starting system shall consist of an air starting motor or distributor, applicable valves, strainer, lubricator, lines connections, and fittings.

2.7.3 The air starting system shall be compatible with the ship’s air supply. The engine shall be capable of starting with a minimum pressure of 70 psig.

2.7.4 The system shall be capable of sustained firing within 5 seconds following initiation of a start with engine in standby mode.

2.7.5 The engine shall be supplied with all necessary starting components and controls.

2.7.6 The system shall include a device to automatically shut-off the starting air when the engine starts.

2.7.7 Existing start air receivers shall be utilized. Start air storage capacity is 508 gallons @ 250 psig.

2.8 Electrical Start for Emergency Diesel Generator (EDG) Sets

2.8.1 The engine on the Emergency Diesel Generator shall be capable of starting with the existing shipboard electric starting system. The current system configuration is eight (8) lead acid (8D) batteries supplying 24V DC and charging system.

2.9 Turbochargers

2.9.1 Balancing: Rotors shall be dynamically balanced at a speed equal to the natural period of the balancing machine and rotor combined.

2.9.2 Lubrication: Turbochargers shall receive lubrication from the engine lubricating oil system.

2.9.3 Housing: Turbochargers shall be capable of containing within the housing any parts of the rotating members which may become fragmented due to loosening, shattering or over speeding.

2.9.4 Air Filtration and Combustion: The engine shall use compartment air for combustion, and shall be fitted with a heavy duty air cleaner system. Filter elements shall be replaceable.

2.10 Exhaust System

2.10.1 Manometer Fittings: Pipe fittings shall be provided near the turbocharger inlet and exhaust flange in an easily accessible location for the connection of manometer gauges.

2.10.2 Exhaust Cooling: The exhaust system components shall be water-cooled, water blanketed, or heat-shielded.

2.10.3 Exhaust Connections: Connections shall be ANSI B16.5, 150 psi flat-faced flanges manufactured from ASTM A182 grade 321 stainless steel. The Vendor shall furnish any necessary adapters to create this connection.

2.10.4 Exhaust Materials: Material for exhaust system (silencer, expansion joint and piping) shall be corrosion resistant steel (CRES) grades 316L, 321 or 347. Steel 316L shall not be used where temperatures may exceed 750 °F.

2.10.5 Exhaust Silencers: Exhaust silencers shall be of the dry-type, marine rated spark arresting silencers with soot collectors, manufactured from ASTM A240 grade 321 stainless steel and shall be of the type suitable for vertical or horizontal mounting in the uptake and approved by the engine manufacturer.

2.10.5.1 The thickness of shell and internal baffles shall be minimum 3/16”.

2.10.5.2 Silencer shall be fitted with a low point drain with cutout valve.

2.10.5.3 Silencers shall have isolation mounts.

2.10.5.4 An access for inspection and cleaning shall be provided.

2.10.5.5 SSDG Silencers: The SSDG silencers shall provide noise attenuation of at least 15 dB over the octave band center frequency range of 63 to 8000 hertz, plus an additional noise attenuation of at least 10 dB over the middle area of this octave range. The overall length shall not exceed 85” and the diameter shall not exceed 26”. The configuration shall be side inlet and center exhaust, and the outlet connection shall be an 8” 150 psi ANSI

B16.5 flange.

2.10.5.6 EDG Silencers: The overall length of the EDG silencer shall not exceed 48” and the diameter shall not exceed 24”. The configuration shall be center inlet and exhaust, and the connections shall be 12” 150 psi ANSI B16.5 flanges.

2.11 Engine Regulation and Protection

2.11.1 Governor: Each engine governor shall be of the electrical load and speed sensing type with the required control devices for paralleling and operating the generator from the switchboards.

2.11.1.1 Governors shall be equipped with a back-up system to permit manual/local control of the engine in the event of a control system failure.

2.11.1.2 In the event of failure of the electrical circuits or components of the governor, three-phase short circuits on the generator or loss of excitation, the governor shall retain speed control of the engine.

2.11.1.3 The governor shall maintain the steady state frequency within a variation of ± 3%, with a worst-case excursion, including frequency modulation and transients, of ± 5.5%, for all loads from no load to full load.

2.11.1.4 With the sudden application or removal of 50% rated load, applied at a zero load condition and removed to a zero load condition, the frequency variation shall not exceed the limits of Type I power described in MIL-STD 1399 Section 300b. The frequency is to return to within ± 1% of the final state condition in no more than two (2) seconds.

2.11.1.5 The generators shall operate in parallel with zero speed droop when the load sensing governor is in use and with speed droop when paralleling with shore power.

2.11.2 Over Speed: The engine shall be capable of running at 1.2 times the rated speed for a period of two minutes without damage to generator set or components.

2.11.2.1 Over Speed Trip: The engine shall be equipped with an over speed trip mechanism, capable of stopping the engine when 115% rated speed is reached. Over speed trip shall still function in the event of a control system failure.

2.11.3 Low Lube Oil Pressure: A two stage low lube oil pressure alarm shall be installed. The second stage shall initiate engine shutdown.

2.11.4 No other automatic engine trips other than over speed and lube oil system failure are required.

2.12 Emergency Shutdowns

2.12.1 The engine shall be provided with an emergency shutdown device independent of the governor. The device shall be operable by a pull handle or pushbutton. It shall function by interrupting fuel flow to the engine and shall stop the engine without damage within 60 seconds. The device shall require manual resetting before the engine can be restarted. The device may be combined with the over speed trip device. Means shall also be provided to actuate the trip locally at the engine.

2.13 Crankshaft

2.13.1 Coupling flanges shall be secured to the crankshaft in accordance with ABS SVR. Means shall be provided for centering the flange with the mating part of the flywheel or driven unit. Nuts shall be accessible and locked or keyed in place. Provisions shall be made on the free end of the crankshaft for attaching a torsiograph drive.

2.14 Guards and Shields

2.14.1 Suitable shielding or guards for protection of personnel shall be provided for hot surfaces and for flywheel couplings and other external moving parts. Flange shielding shall be installed on fuel and lube oil lines as well as strainers filters. In accordance with NVR 2-2-1 3.12.4, hot machinery surfaces shall be shielded or insulated so that no external surface may exceed 220°C (428°F). This is to prevent flash fires.

2.15 Access and Inspection Covers

2.15.1 Suitable access and inspection covers shall be designed for inspection and repair. Crankcase explosion relief valves shall be furnished if required per ABS SVR. A flame arrestor shall be incorporated in the relief valve.

2.16 Designation and Marking

2.16.1 An identification plate shall be located on the engine block near the controls. A plate with an arrow showing the direction of rotation shall be secured to the engine block at the power take-off end of the engine.

2.16.2 The engine identification plate information shall be engraved, etched or stamped on corrosion resisting metal. The following items shall appear on the identification plate:

o Name of manufacturer o Engine model o Engine serial number o Number of cylinders o Bore and stroke o Continuous horsepower o Continuous RPM o Approximate dry weight o Date of manufacture o Emissions rating and compliance data

2.16.3 The flywheel rim or other rotating parts of large diameter attached to the crankshaft shall be marked to permit checking of the valve and injection pump timing.

2.16.4 Complete accessory components such as pumps, coolers, governors and other such items shall be provided with nameplates that show: manufacturer’s name, type, part number or model.

3.0 Generators

3.1 General

3.1.1 Generators shall be capable of operating continuously at any load up to its maximum continuous power rating

3.1.2 Generators shall be capable of operating at least 110% of continuous maximum kW rating for a period of 2 hours.

3.1.3 All generators shall be capable of supplying power to the electric system such that the supply to all consuming equipment shall be within the limits defined as Type I power in MIL-STD-1399 Section

300b.

3.1.4 Generator shall be capable of sustaining 150% of rated current without damage for a period of 30 seconds (see ABS SVR 4-8-3/3.7.1).

3.2 Generator Cooling System

3.2.1 The generator windings shall be water cooled.

3.2.2 Water cooling system shall be capable of maintaining generator winding temperature within OEM specified temperatures when seawater is between 28 and 95 °F.

3.2.3 The generators shall be designed to operate at temperatures up to 120 °F ambient temperature.

3.2.4 Generator bearing temperatures as specified by the OEM shall not be exceeded.

3.3 Generator Heaters

3.3.1 Electric heaters shall be provided for each generator in order to prevent the condensation of moisture on the windings while the generator is idle. These heaters shall be automatically de-energized whenever the diesel engine for the generator is started.

3.4 Excitation

3.4.1 Excitation shall be provided by a static, brushless exciter for which no external source of power is required.

3.4.2 The excitation system shall be fail-safe by limiting maximum generator voltage to 115% of rated voltage under any abnormal condition or failure within the excitation system. See NVR 3-3-2 7.1.3.

3.4.3 Under short-circuit conditions, the excitation system shall be capable of maintaining a steady-state short-circuit current of at least three times the full load current for at least 2 seconds. The generator shall be capable of withstanding the mechanical and thermal stresses induced by this short-circuit current without damage or degradation. See SVR 4-8-3/3.13.2.

3.5 Voltage Control

3.5.1 The sensitivity of voltage regulators shall be ± 1% for the ship service and emergency generators.

Sensitivity represents the band or zone of voltage expressed in terms of the normal value of regulated voltage, within which the regulator will normally hold the voltage under steady load conditions and all environmental conditions without reactive droop compensation. In addition, the voltage dip upon sudden application of a two per unit impedance, 0.4 power factor load shall not exceed the limits of Type I power as defined in MIL-STD-1399, Section 103. Regulators shall employ adjustable individual droop compensation in order to provide for proper parallel operation.

3.5.2 Each voltage regulator shall be used during factory tests of its associated generator set.

3.5.3 The voltage regulation and excitation systems shall incorporate the following features:

a) Voltage regulator components, controls and switches shall be easily replaceable and shall be suitable for mounting in a drip-proof switchboard.

b) A means to manually control or adjust the generator voltage through controls installed on the switchboard. Manual regulation shall permit a degree of accuracy of + 5% and – 3%.

c) When the automatic voltage regulator is in use, operation of the manual control shall not change the regulated voltage.

3.6 Load Control

3.6.1 Under any load, power factor, rated frequency and not more than 4% reactive droop compensation, the voltage regulator shall maintain the division of reactive load among controlled generators so that the maximum difference in kvar supplied from either generator shall not exceed 6% of the continuous kvar rating of either generator.

3.7 Parallel Operation

3.7.1 Each generator shall be capable of operating continuously in parallel with any other generator at any load up to their combined maximum continuous power rating.

3.7.2 Each generator shall be capable of synchronizing with shore power and be capable of briefly operating in parallel with shore power in order to enable the transfer of the electrical load from shore to generator or generator to shore without any electrical disruptions.

3.7.3 The ratio of kW load to kW rating of any paralleled generator shall not differ from the ratio of total kW load to combined kW rating of both paralleled generators by more than 5%.

3.7.4 Synchronization shall be controlled by both manual and automatic means from the main and emergency switchboards. Paralleling shall be accomplished by manually or automatically controlling the oncoming generator's speed, voltage and phase angle to match, within required limits, that of the generator supplying the bus, then manually operating the breaker, which connects the oncoming electrical source.

3.8 Insulation Resistance

3.8.1 Insulation resistance between current-carrying conductors and ground and between current-carrying conductors of opposite polarity shall not to be less than 1 MΩ.

3.9 Designation and Marking

3.9.1 An identification plate shall be located on the generator showing generator specifications, manufacturer, serial number, date of manufacture, etc.

4.0 Coast Guard Machinery Control System (CGMCS)

4.1 General

4.1.1 The Coast Guard Machinery Control System (CGMCS) currently monitors numerous parameters on both ship service diesel generator sets and the emergency diesel generator set. It also provides limited controls.

4.2 Control, Monitoring, & Alarm

4.2.1 The existing control, monitoring and alarm functions in CGMCS shall be maintained as currently configured for existing SSDGs and the EDG.

4.2.2 In order to interface with CGMCS, the generator sets shall be capable of providing the following parameters utilizing the MODBUS/TCP-IP protocol for monitoring, control and indication functions:

SSDG Engine Speed RPM

SSDG Crankcase Pressure

SSDG Lube Oil Pressure

SSDG Winding Temperature

SSDG Lube Oil Sump Level -Low

SSDG Engine Running/Stopped Indication

SSDG Stop Command

SSDG Run Command

SSDG Standby Mode Indication

SSDG Pre Lube Pump Running/Stopped Indication

SSDG Pre Lube Pump Stop Command

SSDG Pre Lube Pump Run Command

SSDG Engine Lube Oil Pressure

SSDG Lube Oil Temperature Before Cooler

SSDG Lube Oil Temperature After Cooler

SSDG Engine Fuel Oil Pressure

SSDG Engine Individual Cylinder Temperatures

SSDG Engine Exhaust to Turbo Temperature

SSDG Engine Exhaust from Turbo Temperature

SSDG Starting Air Pressure

SSDG Jacket Water Pressure

SSDG Jacket Water Temperature from Cooler

SSDG Jacket Water Temperature from Engine

SSDG Air Inlet Temperature

SSDG Generator Power

SSDG Generator Voltage

SSDG Generator Current

SSDG Generator Frequency

SSDG Generator Bearing Temperature

SSDG Generator Air Temperature

Breaker Shunt Trip Command (SSDG 1, SSDG 2, EDG)

EDG Engine Speed RPM

EDG Engine Running Indication

EDG Engine Run/Stop Indication

EDG Engine Standby Indicator

EDG Engine Prelube Pump Indicator

EDG Engine Lube Oil Pressure

EDG Engine Lube Oil Temperature to Cooler

EDG Engine Lube Oil Temperature from Cooler

EDG Fuel Oil Pressure

EDG Engine Exhaust Temperature to Turbo

EDG Engine Exhaust Temperature from Turbo

EDG Engine Inlet Air Pressure

EDG Engine Inlet Air Temperature

EDG Engine Jacket Water Pressure

EDG Engine Jacket Water Heater on Indicator

EDG Engine Jacket Water to Engine Temperature

EDG Engine Jacket Water from Engine Temperature

EDG Engine Seawater from Cooler Temperature

EDG Engine Seawater to Cooler Temperature

EDG Engine Seawater Pump Running Indicator

EDG Engine Seawater Pressure

EDG Generator Power

EDG Generator Current

EDG Generator Winding Temperature

EDG Generator Frequency

EDG Generator Bearing Temperature