80NSSC21760796Q RFQ.pdf

1 V1.07 DEC 2020

National Aeronautics and Space Administration

NASA Shared Services Center Stennis Space Center, MS 39529-6000

3/10/2021

SUBJECT: Request for Quotation (RFQ) 80NSSC21760796Q, Generator and ATS(Automatic Transfer Switches) for IACP Secondary Pumps

This solicitation includes the following sections:

1. Statement of Work/Bid Schedule – Section 1

2. Instructions to Offerors – Section 2

3. Solicitation Provisions/Representations and Certifications – Section 3

4. Clauses/Terms and Conditions – Section 4

5. Quote Evaluation Criteria – Section 5

2 V1.07 DEC 2020

SECTION 1

STATEMENT OF WORK/BID SCHEDULE

This a Brand Name or Equal To requirement.

ENTER SOW/BID SCHEDULE:

The following equipment should be procured to include delivery to KSC site. NASA SI to witness factory testing onsite for generator only.

• One New enclosed KOHLER EPA Certified Diesel Generator Set 500kW, @ 0.8 PF, 60 Hz, Three Phase, UL 2200, 277/480 VOLT, with two kirked key l ine circuit breakers 3 Pole, 100% Electronic LSI, 1000A.

o Model: 500REOZJB

• One cable tap box 1000AMPERE, 4X 304 STAINLESS 277/480 VOLT, Wall mounted, mechanical lugs for permanent connection, female camlocs for load bank connection.

• One Automatic Transfer Switch rated at 277/480 Volt, Three Phase, NEMA 1, 400 AMP, 4 POLE, 35KAIC o Model: KCS-AMVC-0400s.

• Four Automatic Transfer Switches rated at 277/480 Volt, Three Phase, NEMA 1, 260 AMP, 4 POLE, 35KAIC o Model: KCS-AMVC-0260s.

Diesel generator set should be in accordance with Specifications called out on drawing 79K40836 Section 26 32 15.00 10 Part

2. Below is snapshot taken from 79K40836.

PART 2 PRODUCTS

2.1 SYSTEM REQUIREMENTS

a. Provide and install each engine-generator set complete and totally functional, with all necessary ancillary equipment to include: air filtration; starting system; generator controls, protection, and isolation; instrumentation; lubrication; fuel system; cooling system; and engine exhaust system.Each engine-generator set shall satisfy the requirements specified in the Engine-Generator Parameter Schedule.

b. Each set shall consist of one engine, one generator, and one exciter mounted, assembled, and aligned on one base; and other necessary ancillary equipment which may be mounted separately. Sets having a capacity of 750 kW or smaller shall be assembled and attached to the base prior to shipping. Sets over 750 kW capacity may be shipped in sections. Each set component shall be environmentally suitable for the location shown and shall be the manufacturer's standard product offered in catalogs for commercial or industrial use. Any nonstandard products or components and the reason for their use shall be specifically identified.

2.1.1 Engine-Generator Parameter Schedule

Submit description of the generator features which mitigate the effects of the non-linear loads l isted.

ENGINE-GENERATOR PARAMETER SCHEDULE

Power Rating Optional Standby

ENGINE-GENERATOR PARAMETER SCHEDULE

Service Load 100-percent rated load

Motor Starting kVA (Max.) 105 kVA

Power Factor 0.8 lagging

Engine-Generator Applications stand-alone

Maximum Speed 1800 rpm

Heat Exchanger Type fin-tube (radiator)

Voltage Regulation (No Load to Full Load)(Stand alone applications)

+ 2 percent (maximum)

Voltage Bandwidth (steady state) + 2 percent

Frequency 60 Hz

Voltage 277/480 volts

Phases 3 Phase, Wye

Minimum Generator Subtransient Reactance 13.7 percent

Nonlinear Loads 500 kVA

Max Step Load Increase 100 percent of Service Load at 80 percent

PF

Transient Recovery Time with 100% Step Load Increase (Voltage)

3 seconds

Transient Recovery Time with 100% Step Load Increase (Frequency)

3.5 seconds

Maximum Voltage Deviation with Step Load Increase 40.2 percent of rated voltage

Maximum Frequency Deviation with Step Load Increase

22.3 percent of rated frequency

Max Step Load Decrease (without shutdown) 100 percent of Service Load at 80 percent

PF

Max Time to Start and be Ready to Assume Load 10 seconds

Max Summer Outdoor Temp (Ambient) 104 degrees F

Min Winter Outdoor Temp (Ambient) 0 degrees F

Installation Elevation 20' above sea level

ENGINE-GENERATOR PARAMETER SCHEDULE - Governor

Governor Type Isochronous Frequency Bandwidth (steady state) 0.25 percent

ENGINE-GENERATOR PARAMETER SCHEDULE - Governor

Governor Type Droop Frequency Regulation (droop) (No Load to Full Load) 3 percent (maximum) Frequency Bandwidth (steady state) + 0.5 percent

2.1.2 Rated Output Capacity

Each engine-generator-set shall provide power equal to the sum of Service Load plus the machine's efficiency loss and associated ancillary equipment loads. Rated output capacity shall also consider engine and/or generator oversizing required to meet requirements in paragraph Engine-Generator Parameter Schedule.

2.1.3 Power Ratings

Power ratings shall be in accordance with EGSA 101P.

2.1.4 Transient Response

The engine-generator set governor and voltage regulator shall cause the engine-generator set to respond to the maximum step load changes such that output voltage and frequency recover to and stabilize within the operational bandwidth within the transient recovery time. The engine-generator set shall respond to maximum step load changes such that the maximum voltage and frequency deviations from bandwidth are not exceeded.

2.1.5 Engine-Generator Set Enclosure

The engine-generator set enclosure shall be corrosion resistant and fully weather resistant, 180 mph wind and impact rated with Professional Engineer certification. The enclosure shall contain all set components and provide ventilation to permit operation at Service Load under secured conditions. Doors shall be provided for access to controls and equipment requiring periodic maintenance or adjustment. Removable panels shall be provided for access to components requiring periodic replacement. The enclosure shall be capable of being removed without disassembly of the engine-generator set or removal of components other than the exhaust system. The enclosure shall reduce the noise of the generator set to within the l imits specified in the paragraph SOUND LIMITATIONS.

Provide danger l imit warning labels indicating hazards such as rotating machinery and burning hot surfaces, on access panels.

2.1.6 Vibration Isolation

The engine-generator set shall be provided with a vibration-isolation system in accordance with the manufacturer's standard recommendation. Submit vibration isolation system performance data for the range of frequencies generated by the engine-generator set during operation from no load to full load and the maximum vibration transmitted to the floor plus description of seismic qualification of the engine-generator mounting, base, and vibration isolation. Submit torsional analysis including prototype testing or and calculations which certify and demonstrate that no damaging or dangerous torsional vibrations will occur when the prime mover is connected to the generator, at synchronous speeds, + 10 percent. Vibration-isolation systems shall be designed and qualified (as an integral part of the base and mounting system in accordance with the seismic parameters specified. Where the vibration-isolation system does not secure the base to the structure floor or unit foundation, seismic restraints shall be provided in accordance with the seismic parameters specified.

2.1.7 Fuel Consumption

Engine fuel consumption shall not exceed the following maximum limits based on the conditions l isted below.

Size Range Net kW Percent of Rated Output Capacity Fuel Usage lbs/kWH

100 - 299 75 and 100 0.600

50 0.643

300 - 999 75 and 100 0.392

50 0.600

1000 - 2500 75 and 100 0.536

50 0.573

Conditions:

a. Net kW of the Set corrected for engine auxiliaries that are electrically driven, where kW is electrical kilowatt hours.

b. 19,350 Btu/pound high-heat value for fuel used.

c. Sea level operation.

d. Intake-air temperature not over 90 degrees F.

e. Barometric pressure of intake air not less than 28-1/4 inches of mercury.

2.1.8 Harmonic Requirements

Non-linear loads to be served by each engine-generator set are as indicated. The maximum linear load demand (kVA @ PF) when non-linear loads will also be in use is as indicated.

2.1.9 Starting Time Requirements

Upon receipt of a signal to start, each engine generator set will start, reach rated frequency and voltage and be ready to assume load within the time specified. For standby sets used in emergency power applications, each engine generator set will start, reach rated frequency and voltage, and power will be supplied to the load within the starting time specified.

2.2 NAMEPLATES

Each major component of this specification shall have the manufacturer's name, type or style, model or serial number and rating on a plate secured to the equipment. As a minimum, nameplates shall be provided for:

Engines

Generators

2.3 SAFETY DEVICES

Exposed moving parts, parts that produce high operating temperatures, parts which may be electrically energized, and parts that may be a hazard to operating personnel shall be insulated, fully enclosed, guarded, or fitted with other types of safety devices. The safety devices shall be installed so that proper operation of the equipment is not impaired.

2.4 MATERIALS AND EQUIPMENT

Submit certification stating that where materials or equipment are specified to comply with requirements of UL, written proof of such compliance has been obtained. The label or l isting of the specified agency, or a written certificate from an approved, nationally recognized testing organization equipped to perform such services, stating that the items have been tested and conform to the requirements and testing methods of the specified agency are acceptable as proof.

2.4.1 Filter Elements

Fuel-oil, lubricating-oil, and combustion-air filter elements shall be manufacturer's standard.

2.5 ENGINE

Each engine shall operate on No. 2-D diesel fuel conforming to ASTM D975, shall be designed for stationary applications and shall be complete with ancillaries. The engine shall be a standard production model shown in the manufacturer's catalog describing and depicting each engine-generator set and all ancillary equipment in sufficient detail to demonstrate complete specification compliance. The engine shall be naturally aspirated, supercharged, or turbocharged. The engine shall be 2- or 4-stroke-cycle and compression-ignition type. The engine shall be vertical in-line, V- or opposed-piston type, with a solid cast block or individually cast cylinders. The engine shall have a minimum of two cylinders. Opposed-piston type engines shall have not less than four cylinders. Each block shall have a coolant drain port. Each engine shall be equipped with an overspeed sensor.

2.6 FUEL SYSTEM

The entire fuel system for each engine-generator set shall conform to the requirements of NFPA 30 and NFPA 37 and contain the following elements.

2.6.1 Pumps

2.6.1.1 Main Pump

Each engine shall be provided with an engine driven pump. The pump shall supply fuel at a minimum rate sufficient to provide the amount of fuel required to meet the performance indicated within the parameter schedule. The fuel flow rate shall be based on meeting the load requirements and all necessary recirculation.

2.6.2 Fuel Filter

Provide a minimum of one full-flow fuel filter for each engine. The fi lter shall be readily accessible and capable of being changed without disconnecting the piping or disturbing other components. The fi lter shall have inlet and outlet connections plainly marked.

2.6.3 Relief/Bypass Valve

Provide a relief/bypass valve to regulate pressure in the fuel supply l ine, return excess fuel to a return l ine and prevent the build-up of excessive pressure in the fuel system.

2.7 LUBRICATION

Each engine shall have a separate lube-oil system conforming to NFPA 30 and NFPA 37. Each system shall be pressurized by engine-driven pumps. System pressure shall be regulated as recommended by the engine manufacturer. A pressure relief valve shall be provided on the crankcase for closed systems. The crankcase shall be vented in accordance with the manufacturer's recommendation except that it shall not be vented to the engine exhaust system.

2.7.1 Lube-Oil Fi lter

Provide one full-flow filter for each pump. The fi lter shall be readily accessible and capable of being changed without disconnecting the piping or disturbing other components.The fi lter shall have inlet and outlet connections plainly marked.

2.7.2 Lube-Oil Sensors

Equip each engine with lube-oil pressure sensors located downstream of the filters and provide signals for required indication and alarms. Submit two complete sets of fi lters, required for maintenance, supplied in a suitable storage box. These fi lters shall be in addition to fi lters replaced after testing.

2.8 COOLING SYSTEM

Provide each engine with its own cooling system to operate automatically while its engine is running. The cooling system coolant shall use a combination of water and ethylene-glycol sufficient for freeze protection at the minimum winter outdoor temperature specified. The maximum temperature rise of the coolant across each engine shall not exceed that recommended below. Submit a letter which certifies that the engine-generator set and cooling system function properly in the ambient temperature specified, stating the following values:

a. The maximum allowable inlet temperature of the coolant fluid.

b. The minimum allowable inlet temperature of the coolant fluid.

c. The maximum allowable temperature rise in the coolant fluid through the engine.

2.8.1 Coolant Pumps

Coolant pumps shall be the centrifugal type. Each engine shall have an engine-driven primary pump.

2.8.2 Heat Exchanger

2.8.2.1 Fin-Tube-Type Heat Exchanger (Radiator)

Heat exchanger may be factory coated with corrosive resistant film, provided that correction measures are taken to restore the heat rejection capability of the radiator to the initial design requirement via over sizing, or other compensating methods. Internal surfaces shall be compatible with liquid fluid coolant used.

Materials and coolant are subject to approval by the Contracting Officer. Heat exchangers shall be pressure type incorporating a pressure valve, vacuum valve and a cap. Caps shall be designed for pressure relief prior to removal. Each heat exchanger and the entire cooling system shall be capable of withstanding a minimum pressure of 7 psi and shall be protected with a strong grille or screen guard. Each heat exchanger shall have at least two tapped holes; one tapped hole shall be equipped with a drain cock, the rest shall be plugged.

2.8.3 Expansion Tank

The cooling system shall include an air expansion tank which will accommodate the expanded water of the system generated within the normal operating temperature range, limiting the pressure increase at all components in the system to the maximum allowable pressure at those components. The tank shall be suitable for operating temperature of 250 degrees F and a working pressure of 125 psi. The tank shall be constructed of welded steel, tested and stamped in accordance with ASME BPVC SEC VIII D1 for the stated working pressure. A bladder type tank shall not used. The tank shall be supported by steel legs or bases for vertical or steel saddles for horizontal installation.

2.8.4 Thermostatic Control Valve

A modulating type, thermostatic control valve shall be provided in the coolant system to maintain the coolant temperature range submitted in paragraph SUBMITTALS.

2.8.5 Temperature Sensors

Each engine shall be equipped with coolant temperature sensors. Temperature sensors shall provide signals for pre-high and high indication and alarms.

2.9 SOUND LIMITATIONS

Submit sound power level data for the packaged unit operating at 100 percent load in a free field environment. The data should demonstrate compliance with the sound limitation requirements of this specification. Submit certification from the manufacturer stating that the sound emissions meet the specification. The noise generated by the diesel generator set operating at 100 percent load shall not exceed the following sound pressure levels when measured in a free field at a radial distance of 22.9 feet 7 meters at 45 degrees apart in all directions. Maximum acceptable sound level (decibels average): 77dB(A).

2.10 AIR INTAKE EQUIPMENT

Filters and silencers shall be provided in locations that are convenient for servicing. The silencer shall be of the high-frequency filter type, located in the air intake system as recommended by the engine manufacturer. Silencer shall be capable of reducing the noise level at the air intake so that the indicated pressure levels specified in paragraph SOUND LIMITATIONS will not be exceeded. A combined fi lter-silencer unit meeting requirements for the separate fi lter and silencer items may be provided.

Expansion elements in air-intake lines shall be rubber.

2.11 EXHAUST SYSTEM

The system shall be separate and complete for each engine. Piping shall be supported to minimize vibration. Where a V-type engine is provided, a V-type connector, with necessary flexible sections and hardware, shall connect the engine exhaust outlets.

2.11.1 Flexible Sections and Expansion Joints

A flexible section shall be provided at each engine and an expansion joint at each muffler. Flexible sections and expansion joints shall have flanged connections. Flexible sections shall be made of convoluted seamless tube without joints or packing. Expansion joints shall be the bellows type.

Expansion and flexible elements shall be stainless steel suitable for diesel-engine exhaust gas at the maximum exhaust temperature that is specified by the engine manufacturer.

Expansion and flexible elements shall be capable of absorbing vibration from the engine and compensation for thermal expansion and contraction.

2.11.2 Exhaust Muffler

A chamber type exhaust muffler shall be provided. The muffler shall be constructed of welded steel and designed for inside horizontal mounting. Eyebolts, lugs, flanges, or other items shall be provided as necessary for support in the location and position indicated. Pressure drop through the muffler shall not exceed the recommendations of the engine manufacturer. Outside mufflers shall be zinc coated or painted with high temperature 2000 degrees resisting paint. The muffler and exhaust piping together shall reduce the noise level to less than the maximum acceptable level l isted for sound limitations in paragraph SOUND

LIMITATIONS. The muffler shall have a drain valve, nipple, and cap at the low-point of the muffler.

2.11.3 Exhaust Piping

Horizontal sections of exhaust piping shall be sloped downward away from the engine to a drip leg for collection of condensate with drain valve and cap. Changes in direction shall be long radius. Exhaust piping, mufflers and silencers installed inside any building shall be insulated in accordance with paragraph THERMAL INSULATION and covered to protect personnel. Vertical exhaust piping shall be provided with a hinged, gravity-operated, self-closing, rain cover.

2.12 EMISSIONS

The finished installation shall comply with Federal, state, and local regulations and restrictions regarding the l imits of emissions, as l isted here: EPA Tier 2. Submit certification from the engine manufacturer stating that the engine exhaust emissions meet the federal, state, and local regulations and restrictions specified. At a minimum this certification shall include emission factors for criteria pollutants including nitrogen oxides, carbon monoxide, particulate matter, sulfur dioxide, non-methane hydrocarbon, and for hazardous air pollutants (HPAs).

2.13 STARTING SYSTEM

The starting system for engine generator sets used in non-emergency applications shall be as follows.

2.13.1 Controls

An engine control switch shall be provided with functions including: run/start(manual), off/reset, and, automatic mode.Start-stop logic shall be provided for adjustable cycle cranking and cooldown operation. The logic shall be arranged for manual starting and fully automatic starting in accordance with paragraph AUTOMATIC ENGINE-GENERATOR-SET SYSTEM OPERATION. Electrical starting systems shall be provided with an adjustable cranking l imit device to l imit cranking periods from 1 second up to the maximum duration.

2.13.2 Capacity

The starting system shall be of sufficient capacity, at the maximum outdoor summer temperature specified to crank the engine without damage or overheating. The system shall be capable of providing a minimum of two cranking periods with 15 second intervals between cranks. Each cranking period shall have a maximum duration of 45 seconds.

2.13.3 Electrical Starting

Manufacturers recommended dc system, utilizing a negative circuit ground.

2.13.3.1 Battery

A starting battery system shall be provided and shall include the battery, battery rack, intercell connectors, spacers, automatic battery charger with overcurrent protection, metering and relaying. The battery shall be in accordance with SAE J537. The battery shall be lead-acid, with sufficient capacity, at the minimum outdoor and maximum outdoor temperature specified, to provide the specified cranking periods. Valve-regulated lead-acid batteries are not acceptable.

Provide insulated disconnects for battery main wiring to facilitate battery system maintenance and replacement.

2.13.3.2 Battery Charger

A current-limiting battery charger, conforming to UL 1236, shall be provided and shall automatically recharge the batteries. Submit battery charger sizing calculations. The charger shall be capable of an equalize-charging rate for recharging fully depleted batteries within 24 hours which is manually adjustable in a continuous range and a floating charge rate for maintaining the batteries at fully charged condition. A timer shall be provided for the equalize-charging-rate setting. A battery is considered to be fully depleted when the output voltage falls to a value which will not operate the engine generator set and its components.

2.13.4 Starting Aids

The manufacturer shall provide one or more of other following methods to assist engine starting.

2.13.4.1 Jacket-Coolant Heaters

A thermostatically controlled electric heater shall be mounted in the engine coolant jacketing to automatically maintain the coolant within plus or minus 3 degrees F of the control temperature. The heater shall operate independently of engine operation so that starting times are minimized. Power for the heaters shall be 208 volts ac.

2.13.4.1.1 Standby Rated Sets

The control temperature shall be the temperature recommended by the engine manufacturer to meet the starting time specified at the minimum winter outdoor temperature.

2.13.5 Exerciser

The exerciser shall be in accordance with Section 26 28 21.00 40, AUTOMATIC TRANSFER

SWITCHES.

2.14 GOVERNOR

Each engine shall be provided with a governor which maintains the frequency within a bandwidth of the rated frequency, over a steady-state load range of zero to 100 percent of rated output capacity. The governor shall be configured for safe manual adjustment of the speed/frequency during operation of the engine-generator set, without special tools, from 90 to 110 percent of the rated speed/frequency, over a steady state load range of 0 to 100 percent or rated capacity. Submit two complete sets of special tools required for maintenance (except for electronic governor handset). Special tools are those that only the manufacturer provides, for special purposes, or to reach otherwise inaccessible parts. The tools shall be supplied complete with a suitable tool box. One handset shall be provided for each electronic governor when required to indicate and/or change governor response settings. Isochronous governors shall maintain the midpoint of the frequency bandwidth at the same value for steady-state loads over the range of zero to 100 percent of rated output capacity. Droop governors shall maintain the midpoint of the frequency bandwidth linearly for steady-state loads over the range of zero to 100 percent of rated output capacity, with 3 percent droop.

2.15 GENERATOR

Each generator shall be of the synchronous type, one or two bearing, conforming to the performance criteria in NEMA MG 1, equipped with winding terminal housings in accordance with NEMA MG 1, equipped with an amortisseur winding, and directly connected to the engine. Submit calculations of the engine and generator output power capability, including efficiency and parasitic load data. Insulation shall be Class H.

a. Generator design shall protect against mechanical, electrical and thermal damage due to vibration, 25 percent overspeeds, or voltages and temperatures at a rated output capacity of 110 percent for prime applications and 100 percent for standby applications.

b. Generator ancillary equipment shall meet the short circuit requirements of NEMA MG 1.

Frames shall be the drip-proof type.

c. Submit manufacturer's standard data for each generator (prototype data at the specified rating or above is acceptable), listing the following information:

(1) Direct-Axis subtransient reactance (per unit).

(2) The generator kW rating and short circuit current capacity (both symmetric and asymmetric).

2.15.1 Current Balance

At 100 percent rated output capacity, and load impedance equal for each of the 3 phases, the permissible current difference between any 2 phases shall not exceed 2 percent of the largest current on either of the 2 phases. Submit certification stating that the flywheel has been statically and dynamically balanced and is capable of being rotated at 125 percent of rated speed without vibration or damage.

2.15.2 Voltage Balance

At any balanced load between 75 and 100 percent of rated output capacity, the difference in line-to-neutral voltage among the 3 phases shall not exceed 1 percent of the average l ine-to-neutral voltage. For a single-phase load condition, consisting of 25 percent load at unity power factor placed between any phase and neutral with no load on the other 2 phases, the maximum simultaneous difference in l ine-to-neutral voltage between the phases shall not exceed 3 percent of rated line to neutral voltage. The single-phase load requirement shall be valid utilizing normal exciter and regulator control. The interpretation of the 25 percent load for single phase load conditions means 25 percent of rated current at rated phase voltage and unity power factor.

2.16 EXCITER

The generator exciter shall be of the brushless type. Semiconductor rectifiers shall have a minimum safety factor of 300 percent for peak inverse voltage and forward current ratings for all operating conditions, including 110 percent generator output at 104 degrees F ambient. The exciter and regulator in combination shall maintain generator-output voltage within the l imits specified.

2.17 VOLTAGE REGULATOR

Each generator shall be provided with a solid-state voltage regulator, separate from the exciter. The regulator shall maintain the voltage within a bandwidth of the rated voltage, over a steady-state load range of zero to 100 percent of rated output capacity. Regulator shall be configured for safe manual adjustment of the engine-generator voltage output without special tools, during operation, from 90 to 110 percent of the rated voltage over the steady state load range of 0 to 100 percent of rated output capacity. Regulation drift shall not exceed plus or minus 0.5 percent for an ambient temperature change of 68 degrees F. Reactive droop compensation or reactive differential compensation shall load share the reactive load proportionally between sets during parallel operation. The voltage regulator shall have a maximum droop of 2 percent of rated voltage over a load range from 0 to 100 percent of rated output capacity and automatically maintain the generator output voltage within the specified operational bandwidth.

2.18 GENERATOR ISOLATION AND PROTECTION

Devices necessary for electrical protection and isolation of each engine-generator set and its ancillary equipment shall be provided. The generator circuit breaker (IEEE Device 52) ratings shall be consistent with the generator rated voltage and frequency, with continuous, short circuit withstand, and interrupting current ratings to match the generator capacity.

The generator circuit breaker shall be manually operated. A set of surge capacitors, to be mounted at the generator terminals shall be provided. Monitoring and control devices shall be as specified in paragraph GENERATOR PANEL.

2.18.1 Devices

Switches, circuit breakers, switchgear, fuses, relays, and other protective devices shall be as specified in Section 26 20 00, LOW-VOLTAGE DISTRIBUTION.

2.19 SAFETY SYSTEM

Devices, wiring, remote panels, local panels, etc. shall be provided and installed as a complete system to automatically activate the appropriate signals and initiate the appropriate actions. The safety system shall be provided with a self-test method to verify its operability. Alarm signals shall have manual acknowledgment and reset devices. The alarm signal systems shall reactivate for new signals after acknowledgment is given to any signal. The systems shall be configured so that loss of any monitoring device shall be dealt with as an alarm on that system element.

2.19.1 Audible Signal

The audible alarm signal shall sound at a frequency of 70 Hz at a volume of 75 dB at 10 feet. The sound shall be continuously activated upon alarm and silenced upon acknowledgment.Signal devices shall be located as shown.

2.19.2 Visual Signal

The visual alarm signal shall be a panel light. The l ight shall be normally off, activated to be blinking upon alarm. The l ight shall change to continuously lit upon acknowledgement.If automatic shutdown occurs, the display shall maintain activated status to indicate the cause of failure and shall not be reset until cause of alarm has been cleared and/or restored to normal condition. Shutdown alarms shall be red; all other alarms shall be amber.

2.19.3 Alarms and Action Logic

2.19.3.1 Shutdown

Simultaneous activation of the audible signal, activation of the visual signal, stopping the engine, and opening the generator main circuit breakers shall be accomplished.

2.19.3.2 Problem

Activation of the visual signal shall be accomplished.

2.19.4 Local Alarm Panel

A local alarm panel shall be provided with the following shutdown and alarm functions as indicated and including the l isted Corps of Engineer requirements mounted either on or adjacent to the engine generator set.

Device/ Condition/ Function

What/Where/ Size

NFPA 99 NFPA 110

Level 1

NFPA 110

Level 2

Corps of Engineers Required

Shutdowns w/Alarms

High engine temperature

Automatic/ jacket/ water/ cylinder

SD/CP VA SD/CP VA SD/CP VA SD VA

Low lube-oil pressure

Automatic/ pressure/ level

SD/CP VA SD/CP VA SD/CP VA SD VA

Overspeed Shutdown & Alarm

(110 percent ( + 2 percent of rated speed)

SD/CP VA SD/CP VA SD/CP VA SD VA

Overcrank, Failure to start

Automatic/Fail to start

SD/CP VA SD/CP VA SD/CP VA

When used SD/CP VA SD/CP VA

Air shutdown damper (200-600kW)

When used SD/CP VA SD/CP VA

Function

What/Where/ Size

NFPA 99 NFPA 110

Level 1

NFPA 110

Level 2

Corps of Engineers Required

Red emergency stop switch

Manual Switch SD/CP VA SD/CP VA SD VA

Alarms

Low fuel level

Main tank, 3 hrs remaining

VA/AA CP VA CP VAO CP VA

Integral Main Fuel Storage Tank High Fuel Level

95 percent volume

CP VA

Pre-High Temperature jacket water/ cylinder

CP VA CP VA CP VAO CP VA

Pre-Low Lube-oil Pressure

CP VA CP VA

High battery Voltage

CP VA CP VAO

Low battery Voltage

CP VA CP VAO

Battery charger AC Failure

AC supply not available

CP VA CP VAO

Function

What/Where/ Size

NFPA 99 NFPA 110

Level 1

NFPA 110

Level 2

Corps of Engineers Required

Control switch not in AUTO

CP VA CP VAO

Low starting Air pressure

CP VA CP VAO

Low starting hydraulic pressure

CP VA CP VAO

SD Shut Down

CP On Control Panel

VA Visual Alarm

AA Audible Alarm

O Optional

2.19.5 Time-Delay on Alarms

For startup of the engine-generator set, time-delay devices shall be installed bypassing the low lubricating oil pressure alarm during cranking, and the coolant-fluid outlet temperature alarm. Submit the magnitude of monitored values which define alarm or action set points, and the tolerance (plus and/or minus) at which the devices activate the alarm or action for items contained within the alarm panels. The lube-oil time-delay device shall return its alarm to normal status after the engine starts. The coolant time-delay device shall return its alarm to normal status 5 minutes after the engine starts.

2.19.6 Remote Alarm Panel

Provide a remote alarm panel as indicated and as follows.

Function

What/Where/ Size NFPA 99 NFPA 110 Level 1 NFPA 110 Level 2

Remote annunciator panel Battery Powered Alarms

Loads on genset VA

Battery charger malfunction

VA

Low lube-oil Pressure/level VA/AA AA AAO

Function

What/Where/ Size NFPA 99 NFPA 110 Level 1 NFPA 110 Level 2

Low temperature Jacket water VA/AA AA AAO

High temperature Jacket water/ cylinder

VA/AA AA AAO

Low fuel level Main tank, 3 hrs remaining

VA/AA AA AAO

Overcrank Failure to start VA/AA AA AAO

Overspeed VA/AA AA AAO

Pre-high temperature

Jacket water/ cylinder

AA

Control switch not in

AUTO

AA

Common alarm contacts for local & remote common alarm

X X

Audible alarm silencing switch

X O

Air shutdown damper

When used AA AAO

Common fault alarm AA

X Required

SD Shutdown

CP On Control Panel

VA Visual Alarm

AA Audible Alarm

O Otional

2.20 ENGINE GENERATOR SET CONTROLS AND INSTRUMENTATION

Devices, wiring, remote panels, local panels, etc. shall be provided and installed as a complete system to automatically activate the appropriate signals and initiate the appropriate actions.

2.20.1 Controls

Provide a local control panel with controls as indicatedand as follows mounted. Provide a remote control panel fully redundant to the local control panel. Control annunciator communication interface protocol shall be Mod Bus TCP/IP.

Function

Corps of Engineers Requirements

NFPA 110 Level 1 NFPA 110 Level 2 Manufacturer Offering

Switch: run/start -off/reset - auto

CP CP/STD

Emergency stop switch & alarm

CP CP/STD

Lamp test/ indicator test

CP CP VA CP VA CP/STD

Common alarm contacts/ fault relay

X X CP/O

Panel l ighting CP CP/STD

Audible alarm & silencing/ reset switch

CP

Voltage adjust for voltage regulator

CP CP/STD

Remote emergency stop switch

CP VA CP VA

Remote fuel shutoff switch

X Required

STD Manufacturers Standard Offering CP On Control Panel VA Visual Alarm O Otional

2.21 PANELS

2.21.1 Enclosures

Enclosures shall be designed for the application and environment, conforming to NEMA ICS 6.

Locking mechanisms shall be keyed alike.

2.21.2 Electronic

Electronic indicating instruments shall be true RMS indicating instruments, 100 percent solid state, state-of-the-art, microprocessor controlled to provide specified functions. Control, logic, and function devices shall be compatible as a system, sealed, dust and water tight, and shall utilize modular components with metal housings and digital instrumentation. An interface module shall be provided to decode serial link data from the electronic panel and translate alarm, fault and status conditions to set of relay contacts. Instrument accuracy shall be not less than 98 percent for unit mounted devices and 99 percent for control room, panel mounted devices, throughout a temperature range of minus 4 to 158 degrees F. Data display shall utilize LED or back l it LCD. Additionally, the display shall provide indication of cycle programming and diagnostic codes for troubleshooting. Numeral height shall be .025 inch.

2.21.3 Parameter Display

Indication or readouts of the tachometer, lubricating-oil pressure, ac voltmeter, ac ammeter, frequency meter, and safety system parameters shall be provided. A momentary switch shall be specified for other panels.

2.22 AUTOMATIC ENGINE-GENERATOR-SET SYSTEM OPERATION

Fully automatic operation shall be provided for the following operations: engine-generator set starting and load transfer upon loss of normal source. Devices shall automatically reset after termination of their function.

2.22.1 Automatic Transfer Switch

Automatic transfer switches shall be in accordance with Section 26 28 21.00 40, AUTOMATIC TRANSFER SWITCHES.

2.22.2 Monitoring and Transfer

Devices shall be provided to monitor voltage and frequency for the normal power source and each engine-generator set, and control transfer from the normal source and retransfer upon restoration of the normal source. Functions, actuation, and time delays shall be as described in Section 26 28 21.00 40, AUTOMATIC

TRANSFER SWITCHES.

2.23 MANUAL ENGINE-GENERATOR-SET SYSTEM OPERATION

Complete facilities shall be provided for manual starting and testing of each set without load, loading and unloading of each set, and synchronization of each set with an energized bus.

2.24 BASE

The base shall be constructed of steel. The base shall be designed to rigidly support the engine-generator set, ensure permanent alignment of rotating parts, be arranged to provide easy access to allow changing of lube-oil, and ensure that alignment is maintained during shipping and normal operation. The base shall permit skidding in any direction during installation and shall withstand and mitigate the affects of synchronous vibration of the engine and generator.The base shall be provided with suitable holes for anchor bolts and jacking screws for leveling.

2.25 THERMAL INSULATION

Thermal insulation shall be provided as standard per manufacturer.

2.26 PAINTING AND FINISHING

The engine-generator set shall be cleaned, primed and painted in accordance with the manufacturer's standard color and practice.

2.27 FACTORY INSPECTION AND TESTS

All factory test data recorded to be sent for acceptance prior to shipping the generator. Submit complete reproducible copies of the factory inspection result on the checklist format specified below.

Perform the factory tests on each engine-generator set. The component manufacturer's production l ine test is acceptable as noted. Each engine-generator set shall be run not less than 1 hour at rated output capacity prior to inspections. Inspections shall be completed and all necessary repairs made, prior to testing. Engine generator controls and protective devices that are provided by the generator set manufacturer as part of the standard package shall be used for factory tests. When controls and switchgear are not provided as part of the generator set manufacturer's standard package, the actual controls and protective devices provided for the project are not required to be used during the factory test. The Contracting Officer may provide one or more representatives to witness inspections and tests.

2.27.1 Factory Inspection

Perform inspections prior to beginning and after completion of testing of the assembled engine-generator set. Inspectors shall look for leaks, looseness, defects in components, proper assembly, etc. and note any item found to be in need of correction as a necessary repair. The following checklist shall be used for the inspection:

INSPECTION ITEM GOOD BAD NOTES

Drive belts

Governor and adjustments

Engine timing mark

Starting motor

Starting aids

Coolant type and concentration

Radiator drains

Block coolant drains

Coolant fi ll level

All coolant line connections

All coolant hoses

Combustion air filter

Combustion air silencer

Lube oil type

Lube oil sump drain

Lube-oil filter

Lube-oil-level indicator

Lube-oil-fill level

All lube-oil l ine connections

All lube-oil l ines

Fuel type and amount

All fuel-line connections

All fuel l ines

Fuel fi lter

Coupling and shaft alignment

Voltage regulators

Battery-charger connections

All wiring connections

Instrumentation

Hazards to personnel

Base

Nameplates

Paint

Exhaust-heat recovery unit

Switchboard

Switchgear

2.27.2 Factory Tests

Submit a letter giving notice of the proposed dates of factory inspections and tests at least 14 days prior to beginning tests, including:

a. A detailed description of the manufacturer's procedures for factory tests at least 14 days prior to beginning tests.

b. Six copies of the Factory Test data described below in 8-1/2 by 11 inch binders having a minimum of 3 rings from which material may readily be removed and replaced, including a separate section for each test. Sections shall be separated by heavy plastic dividers with tabs.

Data plots shall be full size (8-1/2 by 11 inch minimum), showing grid lines, with full resolution.

(1) A detailed description of the procedures for factory tests.

(2) A list of equipment used, with calibration certifications.

(3) A copy of measurements taken, with required plots and graphs.

(4) The date of testing.

(5) A list of the parameters verified.

(6) The condition specified for the parameter.

(7) The test results, signed and dated.

(8) A description of adjustments made.

On engine-generator set tests where the engine and generator are required to be connected and operated together, the load power factor shall be the power factor specified in the engine generator set parameter schedule. For engine-generator set with dual-fuel operating capability the following tests shall be performed using the primary fuel type. Electrical measurements shall be performed in accordance with IEEE 120.

Definitions of terms are in accordance with IEEE Stds Dictionary. Temperature limits in the rating of electrical equipment and for the evaluation of electrical insulation shall be in accordance with IEEE 1. In the following tests where measurements are to be recorded after stabilization of an engine-generator set parameter (voltage, frequency, current, temperature, etc.), stabilization is considered to have occurred when measurements are maintained within the specified bandwidths or tolerances, for a minimum of four consecutive readings.Tests specifically for the generator may be performed utilizing any prime mover.

a. Frequency and Voltage Stability and Transient Response. Verify that the engine-generator set responds to addition and dropping of blocks of load in accordance with the transient response requirements. Document maximum voltage and frequency variation from bandwidth and verify that voltage and frequency return to and stabilize within the specified bandwidth, within the specified response time period. Document results in tabular form and with high resolution, high speed strip chart recorders or comparable digital recorders, as approved by the Contracting Officer.

Tabular data shall include the following:

(1) Ambient temperature (at 15 minute intervals).

(2) Generator output current (before and after load changes).

(3) Generator output voltage (before and after load changes).

(4) Frequency (before and after load changes).

(5) Generator output power (before and after load changes).

(6) Graphic representations shall include the actual instrument trace of voltage and frequency showing: charts marked at start of test; observed steady-state band; mean of observed band;

momentary overshoot and undershoot (generator terminal voltage and frequency) and recovery time for each load change together with the voltage and frequency maximum and minimum trace excursions for each steady state load condition prior to and immediately following each load change. Generator terminal voltage and frequency transient recovery time for each step load increase and decrease.

(a) Perform and record engine manufacturer's recommended pre-starting checks and inspections.

(b) Start the engine, make and record engine manufacturer's after-starting checks and inspections during a reasonable warm-up period and no load. Verify stabilization of voltage and frequency within specified bandwidths.

(c) With the unit at no load, apply the Maximum Step Load Increase.

(d) Apply load in steps equal to the Maximum Step Load Increase until the addition of one more step increase will exceed the Service Load.

(e) Decrease load to the unit such that addition of the Maximum Step Load Increase will load the unit to 100 percent of Service Load.

(f) Apply the Maximum Step Load Increase.

(g) Decrease load to zero percent in steps equal to the Maximum Step Load Decrease.

(h) Repeat steps (c) through (g).

j. Test Voltage Unbalance with Unbalanced Load (Line-to-Neutral) to the performance criteria specified in paragraph GENERATOR. Prototype test data is acceptable in lieu of the actual test. Submit manufacturer's standard certification that prototype tests were performed for the generator model proposed. This test may be performed using any prime mover.

(1) Start and operate the generator set at rate voltage, no load, rated frequency, and under control of the voltage regulator. Read and record the generator frequency, l ine-to-neutral voltages, and the l ine-to-line voltages.

(2) Apply the specified load between terminals L1-L2, L2-L0, and L3-L0 in turn. Record all instrument readings at each l ine-neutral condition.

(3) Express the greatest difference between any two of the line-to-line voltages and any two of the line-to-neutral voltages as a percent of rated voltage.

(4) Compare the largest differences expressed in percent with the maximum allowable difference specified.

Automatic transfer switches should be based on the Specifications called out on drawing 79K40836 Section 26 28 21.00 40 Part 2. Below is snapshot taken from 79K40836.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Provide an automatic transfer switch with a time-delay feature that is field-adjustable from 2 to 30 minutes.

The switch delays the automatic transfer back to normal power until the normal source voltage and frequency reach at least 95 percent of the rated voltage. However, if the emergency power fails and the normal source is again available at 90 percent of the rated voltage, bypass the time-delay circuitry, and transfer the load immediately back to the normal source. Provide the capability for manual transfer in either direction. Operate sensing relays without contact chatter or false response during voltage variations between dropout and pickup.

Submit connection diagrams showing the relations and connections of contacts, indicating l ights, and terminal board by showing the general physical layout of all controls and the interconnection of one system (or portion of system) with another.

Submit fabrication drawings for contacts, indicating lights, terminal board enclosures, and accessories, consisting of fabrication and assembly details to be performed in the factory.

Submit installation drawings for automatic transfer equipment in accordance with paragraph

INSTALLATION.

Submit equipment and performance data for automatic transfer equipment including useful l ife, test, system functional flows, safety features, and mechanical automated details.

2.1.1 Performance Requirements

2.1.1.1 Application

Provide an automatic transfer switch capable of transferring the load from the normal power source to emergency power source, and from an emergency source to the normal power source. Locate the switch here indicated. Provide a switch that is solenoid-operated, mechanically held, double-throw, rated for continuous duty, capable of transferring in 100 milliseconds or less, and conforming to the applicable requirements of UL 1008 and NFPA 70, Article 700, except as herein modified.

Provide an automatic transfer switch of the two-pole type for single-phase application, and three-pole type for three-phase application. Provide an additional switched neutral pole.

Ensure that the automatic transfer switch is capable of being placed in either the normal or the emergency position.

2.1.1.2 Operation

Monitor the normal source voltage across phase l ines by sensing devices. If the normal source voltage in phase drops to 90 percent or less for a timed period, ensure that the automatic transfer switch starts the emergency source and transfers the load to the emergency source when voltage and frequency reach rated values; or, if the emergency source is on, verify the voltage and frequency of the alternate source and transfer the load to the alternate source. Field-adjust this time period from 1 to 30 seconds. Provide a voltage and frequency sensor relay to monitor the rated values on the emergency side to prohibit transfer until the emergency source voltage and frequency reach at least 95 percent of the required rating. Provide phase failure protection, with a 65- to 70-percent drop and a 92- to 95-percent voltage pickup rating.

2.1.1.3 Self-Test Capability

Provide an automatic transfer switch with a control-circuit self-test feature capable of verifying the proper operation of the switch control circuit without moving the main contactor or causing discontinuity of service to the load. Include the following characteristics in the self-test circuit:

a. A key-operated test switch that includes an auto, off, no-load engine test and a load test position.

Include a white l ight to indicate that the switch is in the off position. Ensure that the transfer switch controller includes a programmable engine exerciser with the following selections: Disabled; 7-, 14-and 28-day intervals; and 15 minutes fixed time, load or no load with Failsafe.Design the key-operated switch to prevent removal of the key while the switch is in the self-test mode.

2.2 COMPONENTS

2.2.1 Contacts

Provide main contacts with a wiping-action silver alloy that, when rated for operation at 50 amperes or greater, are protected against arcing. Ensure that auxiliary contacts and control transfer relay contacts have a minimum continuous-current rating of not less than 10-amperes inductive at 120 volts ac.

Provide the following for auxiliary contacts:

a. Generator-control contacts, normally open, that close on undervoltage or loss of normal power as specified, remaining closed until transfer back to normal power

b. Emergency-position contacts, normally open when the switch is in the normal position, that close when the switch is in the emergency position

c. An automatic transfer switch with a switched neutral. Ensure that the switched neutral has: normal position contacts that are normally closed when the switch is in the normal position and opens when the switch is in the emergency position. Ensure that the neutral pole is fully rated and part of the main pole assembly, so that it is switched simultaneously with the main bus contacts.

Use two-pole auxiliary contacts.

Provide an automatic transfer switch with overlapping neutral transfer contacts in addition to the two- or…