amend 2.pdf

W912BU-11-B-0021

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

1. The reason for this modification is to change the wording in line item 0001, by total items 000101 + 000102 to 0001AA and 0001AB.

2. Also in Section I, contract clause 52.228-1 Bid Guarantee, Page 191, States: ( c ) The amount of the bid guarantee shall be 100 percent of the bid price or $ 10,000,000.00 whichever is less. This will be replaced with, “The amount of the bid guarantee shall be 20% percent of the bid price”.

3. Contract Section C733 ELECTRICAL POWER PLANT (page 105) shall be replaced with the revised section below. The revised section will resolve the discrepancy between the drawings and specification regarding the generator size.

C733 ELECTRICAL POWER PLANT

A. DIESEL GENERATOR SET REQUIREMENTS

The Contractor shall provide and install one diesel generator set equal to a Caterpillar C9. The diesel generator set will be located in the Machinery Room. The drawings provided incorrectly show a Caterpillar C18. During the Engineering and Scheduling phase, the Contractor shall revise all drawings including the systems associated to the generator to meet this specification.

The diesel generator set shall be 4-cycle marine type. The diesel generator shall be 215KW at

0.8 power factor at 60 Hz and 1800 rpm. The generator shall be set up to supply 480 volt AC, 3-phase, 3-wire, ungrounded, 60 Hz electrical power.

The generator shall be sized to run all loads on the vessel and provide off vessel power to the attending towboat.

The generator shall be equipped with an amortisseur winding and shall be capable of delivering 110 percent load for two hours without exceeding permissible limits of temperature rise. The generator, along with its regulation and excitation systems shall be capable of supporting overload conditions as well as maintaining short circuit currents of such magnitude and duration as required to properly actuate selective tripping of downstream protective devices.

The voltage regulator shall be a solid-state, volts-per-hertz voltage regulator capable of automatically maintaining constant rated generator voltage throughout the load range of the generator. The voltage regulator shall be capable of maintaining steady state regulation within 1 percent of rated voltage from no load condition to 110 percent rated load condition and shall include a voltage adjusting rheostat with a plus and minus 10 percent adjustment range.

The voltage dip on the generator shall not exceed 25 percent while starting the largest motor on the vessel across the line with the main bus load at 30 percent capacity.

The generator shall have a separate voltage regulator for mounting on the switchboard.

The generator shall have a block heater for the engine and a space heater for the generator power from the 208Y/120VAC main panel.

The diesel engine and generator shall be provided with the following features and options:

• Approved by ABS.

• Voltage droop on the generator that is adjustable.

• The generator shall have a drip proof, guarded enclosure and shall be air cooled and self-ventilated.

• A brushless excitation system and an automatic solid-state voltage regulator.

• An engine mounted fuel pump.

• Set up for battery start.

• Set up to receive combustion air from outside the generator space.

• The combustion air shall pass through a primary marine filtration system similar to

AmerKleen, size 2500, 3-cell, with weather louver housing provided by American Air Filter.

• Dedicated DC control system including battery and charger for controls and automatic shutdowns.

• Electronic governor.

• Emergency stop pushbutton.

• Turbocharged-aftercooled.

• Configured as a closed jacket water cooling system using radiators. Coolant level sensors and gauges to be provided.

• Auxiliary expansion tanks and/or larger jacket water pumps if required to handle the cooling system volume.

• A jacketed manifold and dry exhaust system.

• Engine turbochargers and exhaust manifolds shall be insulated or jacketed to maintain an outer skin temperature of less than 125 degrees F.

• The engine shall be equipped with a crankcase ventilation system similar to a Alfa Laval

Defender 500 centrifugal vent separator recirculator.

• Generator supplied with an electric heater.

• The water, lube and fuel lines to all engine connections shall be fitted with USCG and

ABS approved flexible connections.

• Diesel engine oil sumps shall be fitted with a ball valve and quick disconnect fitting so that oil can be added to or drawn from the sumps.

• A steel base frame with drip pan under the engine.

• Mounted on vibration mounts in order to isolate engine vibration. See contract Clause

C180 for noise and vibration requirements.

• Engines shall be supplied with lifting eyes and mounting support. The Contractor is responsible for supplying suitable foundations for the engines and generators.

• Switchgear controls and instrumentation shall be provided and installed as outlined in contract Clause C740.

• Load bank testing of the diesel engine and generator shall be in accordance with Section

E of the contract.

• Four sets of manuals shall be supplied for the diesel engines and generator sets. See contract Clause H16.

• Spare parts in accordance with contract Clause C800.

The diesel engine and generator set and all associated equipment shall be installed in strict compliance with the engine manufacturer’s recommendations and approved by the manufacturer’s field representative.

B. GENERATOR SET STARTING/STOPPING

The diesel generator set shall be set up to permit starting and stopping locally, at the generator control panels. Start key switches and stop push buttons for the engines shall be installed on the local engine control panel.

The diesel generator set shall be provided with its own dedicated, electric start. The electric starting system shall including starter motor, batteries, battery charging alternator, ammeter, and regulator. The size of the DC starting batteries (12 or 24-volt) shall be as recommended from the engine manufacturer. See Clause C706.

The starting batteries shall be marine, heavy duty, rated in accordance with the engine manufacturer’s recommendations. The Contractor shall provide and install a battery box with cover for the diesel generator set starting batteries.

The generator shall automatically shut down on activation of the CO2 system.

C. GENERATOR SET ALARMS & INSTRUMENTATION

The diesel generator set shall be set up to automatically shutdown upon activation of the following engine alarms:

• engine overspeed

• low lube oil pressure

• high jacket water temperature

Alarms shall be provided for the generator set. The alarm panels shall be located both in the machinery room and in the office. The panels shall be set up such that silencing an alarm at one panel automatically silences the alarm at a second panel.

The alarms shall have both audible and visual signals at both the generator room panel and at the office panel. The alarms shall be provided with fault light lock-in circuitry, lockout of additional alarm lights after engine shutoff, alarm silence buttons, and circuit test buttons.

The following alarms shall be included for the generator set at both the generator panel and the office panel:

• engine overspeed

• low lube oil pressure

• high jacket water temperature

• low starting battery voltage

The diesel generator manufacturer shall provide a local control panel, installed at the generator set. Each panel shall have, as a minimum, the following instrumentation:

• engine hour meter

• jacket water temperature gauge (degrees F)

• lube oil pressure gauge (psi)

• fuel pressure gauge (psi)

• tachometer

• amp meter

• volt meter

• watt meter

• frequency meter

An instrument panel shall be provided and installed at the generator set and office. The following instrumentation shall be included on the panel:

• generator power available light

• jacket water temperature gauge

• lube oil pressure gauge

The following instrumentation and alarms shall be installed in the office for the generator set:

• generator set running light

• generator trouble light and audible alarm

The diesel generator trouble alarm shall be provided with fault light lock-in circuitry, lockout of additional alarm lights after engine shutoff, and alarm silence button.

D. ENGINE COMBUSTION AIR

The generator engine shall be fitted for a dedicated source of outside air for combustion.

The combustion inlet shall be fitted with an intake air cartridge filters. The Contractor shall size the filters to exceed the engine manufacturer’s combustion requirements for the engine. The filters shall be designed and installed so that they are easily removed and cleaned.

(End of Summary of Changes)