State of Maine, 19 Union Street Data Center

Integrated Design Group, Inc.

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 1 Pre-purchase – 02/24/12

SECTION 26 32 13p

ENGINE GENERATORS – 1000 kW – PURCHASE

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Manufacturers

2. Engine-Generator Set

3. Engine

4. Fuel Oil Storage

5. Control And Monitoring

6. Generator Overcurrent And Fault Protection

7. Generator, Exciter, And Voltage Regulator

8. Outdoor Generator-Set Enclosure

9. Vibration Isolation Devices

10. Finishes

11. Source Quality Control

12. The engine generator unit shall include all essential and desirable appurtenances whether specifically mentioned in this specification or not. Provide all components and accessories required.

13. This section includes requirements for EPA Tier 2 rated engine generator(s).

14. The engine generator unit shall be completely prewired and piped so that only field connections to a master terminal strip for control, auxiliaries and alarms, power connections and fuel line connections will be required.

15. Field program control panel for protection of generator and conductors, alarms and modbus interface. Coordinate settings with architect and installer.

16. Coordinate with BMS installer for communication to BMS system.

17. Coordinate with installer and control system for engine starting, stopping, and alarms.

18. Refer to Drawings, including details for electrical requirements.

19. Electrical General Commissioning Requirements. Provide Manufacturer’s support as required to coordinate with the Commissioning Agent and support all commissioning efforts and paperwork, Acceptance and Integrated Systems Testing.

B. Meet the following performance requirements:

1. Engine generator system to provide source of standby power.

2. Description: NFPA 110, engine generator system to provide source of power for Level 1 applications.

3. System Capacity: Provide an engine generator unit rated a minimum of 1000 kW, 1250 kVA, 0.8 P.F., 3 phase, 60 hertz, 277/480 volts, 4 wire. Minimum engine or generator rating to be increased if required by performance requirements.

4. System Performance: The engine generator unit shall be guaranteed that within ten seconds, it will assume the load. Performance parameters and fuel supply shall be as indicated in the Specification and Drawings.

5. Generators shall be suitable to support at least 75% nonlinear load comprised of UPS systems with input filters.

6. The rated horsepower of the engine, at the generator synchronous speed with all accessories attached, shall not be less than that required to produce the output kW specified. In addition, the horsepower rating shall take into account generator efficiency and radiator fan losses. The engine shall be capable of producing this rated power continuously for the duration of any power outage at the operating conditions specified.

7. High Ambient Radiator - Radiator using propylene glycol coolant, sized to maintain safe engine temperature at 110 percent of full rated load in ambient temperature of 122 degrees F (50 degrees C). Radiator Air Flow Restriction: 0.5 inches of water (9.34 mm of

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 2 Pre-purchase – 02/24/12 mercury), maximum. Ambient temperature is measured at the alternator end of the unit and includes the temperature rise within the enclosure.

8. The engine generator set shall be furnished with a skid mounted cooling system having sufficient capacity for cooling the engine and all accessories when the diesel generator set is delivering 110% of full-rated load at the ambient scheduled.

9. Environmental Conditions: Engine-generator system shall withstand the following environmental conditions without mechanical or electrical damage or degradation of performance capability:

a. Ambient Temperature: Minus 15 deg C (5

F) to plus 50 deg C (122

F).

b. Relative Humidity: 0 to 95 percent.

c. Altitude: Sea level to 1000 feet (300 m).

10. Each engine shall not exceed the following emission data values:

a. Federal EPA requirements.

b. Local requirements.

11. Wind, snow, ice, flood and earthquake Performance: In accordance with Section 260009p -1.5.

C. System Description:

1. Engine-generator system located outdoors in an enclosure suitable to support non linear loads and to be operated as a separately derived electrical system with the neutral grounded at the generator.

2. The operation of the units shall be automatic such that upon closing of a remote starting contact, the engines shall start and attain rated voltage and frequency within ten seconds.

3. The engine generator unit and auxiliaries shall be installed in a sound attenuated, weatherproof enclosure as specified in paragraph 2.11.

D. Service and maintenance in addition to warranty requirements:

1. Provide under the provisions indicated in Section 26 00 09p.

1.2 RELATED WORK

A. Section 26 00 09p – Basic electrical requirements, is an integral part of this section.

Requirements and work indicated in 26 00 09p are not repeated in this Section.

1.3 COORDINATION

A. Coordinate work under provisions indicated in Section 26 00 09p.

B. Coordinate all work related to the engine generator and enclosure, provide labor and all components necessary, and schedule deliveries to provide a complete operational system within the contract schedule and requirements.

C. Deliver diesel engine-driven generator, its enclosure and its components properly packaged and mounted on pallets, or skids to facilitate handling of heavy items. Utilize factory-fabricated type containers or wrappings for engine-generator and components that protect equipment from damage and the weather. Delivery should be coordinate to coincide with the area of final installation being ready to accept the equipment.

D. Coordinate with the enclosure manufacturer performance parameters required for unit to operate at 100 percent of its capabilities.

E. Coordinate shipment of completely enclosed, factory tested generator to the enclosure manufacturer. Coordinate size and weights of shipping units with the method to lift the unit.

F. In the event that the coordination of delivery mentioned above is not achieved, instruct Installer on storage of the equipment. Use original packaging to protect from weather.

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G. Manufacturer is responsible for equipment protection and insurance during transit. Unloading and setting in place at the job site will be the responsibility of the Installer.

1.4 QUALIFICATIONS / QUALITY ASSURANCE

A. Conform to requirements indicated in Section 26 00 09p.

B. Manufacturer Qualifications: A qualified manufacturer. Maintain a service center capable of providing emergency on-site repairs in less than 24 hours, 7 days per week. Service center must be capable of providing training, parts, and emergency maintenance repairs.

C. Review enclosure design to ensure all operating requirements necessary to allow engine generator to perform as specified and to perform maintenance are provided and acceptable.

D. Safety Features – the engine generator unit shall be designed to minimize the danger of accidents to operating and maintenance personnel. The manufacturer shall prior to shipment, verify that all electrical connections are tight and that circuits are isolated, that on-set piping connections are well made, and that standard safety equipment is included and functions according to design.

1.5 REGULATORY REQUIREMENTS AND STANDARDS

A. Conform to requirements indicated in Section 26 00 09p:

B. Electrical Code Compliance: Comply with applicable local code requirements of the authority having jurisdiction and NFPA 70 pertaining to construction and installation of engine-generator systems.

C. NFPA Compliance: Comply with applicable requirements of NFPA 30 “Flammable and Combustible Liquids Code”, NFPA 37, "Installation and Use of Stationary Combustion Engines and Gas Turbines," and NFPA 110 “Standard for Emergency and Standby Power Systems” for a level 1 system.

D. UL Compliance: Comply with applicable requirements of the Underwriter's Laboratories including UL2200 – “Stationary Engine Generator Assemblies”. UL 142 “Steel Above Ground Tanks”. UL 2085 “Protected Above Ground Tanks for flammable and combustible liquids with secondary containment”.

E. ANSI/NEMA Compliance: Comply with applicable requirements of ANSI/NEMA MG 1, "Motors and Generators," and MG 2, "Safety and Use of Electric Motors and Generators."

F. IEEE Compliance: Comply with applicable portions of IEEE Std 446, "IEEE Recommended Practice for Emergency and Standby Power Systems for Industrial and Commercial Applications."

G. Insurance Underwriters Compliance: Comply with applicable requirements of the Owner's insurance underwriter Factory Mutual.

H. Environmental Compliance: Comply with all federal and local applicable noise, hazardous materials, and emissions control standards and any authorities having jurisdiction. Packaged Generator set shall be certified and in compliance with emissions regulations.

1.6 SUBMITTALS

A. Submit as required here in and under Section 26 00 09p.

B. General Submittals: Manufacturer shall, upon receipt of an order, proceed immediately with submittal requirements described below to meet proposed shipment date of the equipment

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 4 Pre-purchase – 02/24/12 package to the site. Submit one fully detailed, organized and marked up electronic PDF copy and three hard copies in three ring binders of the following:

1. Bill of Material - Itemized bill of materials for the major and minor systems and sub-systems.

2. Manufacturer's model numbers, brochures and system descriptions, including catalog cuts and/or data sheets describing the proposed equipment. Identify all options provided.

3. Specification Compliance Statement - A listing of all partial and full deviations from these specifications, and any manufacturer’s recommendations. Cite each paragraph and describe how equipment deviates from these specifications. Identify what is proposed in lieu of the required standard.

4. The size and capability of the local service organization, including experience level of service personnel, response time to service call, and escalation procedures.

5. Delivery date of the equipment to the site, allowing for two weeks for shop drawing review by the Architect.

6. Warranty terms, conditions, and maintenance agreement.

7. Recommended spare parts inventory, separately priced.

8. A detailed description of factory test procedures.

9. Manhours allocated for field testing and coordination.

10. Provide Manufacturer’s standard agreement for continued service and maintenance for a period of one year.

11. Operating data – Submit the values of the following items:

a. Air temperature rise through radiator

b. Delta temp of supply and return fuel oil

c. Direct axis transient time constant

d. Direct axis subtransient time constant

e. Direct axis transient reactance

f. Direct axis subtransient reactance

g. Synchronous reactance

h. Insulation class of generator

i. Generator form: wound or random wound

j. X/R ratio

k. Generator performance curve with leading and lagging power factor.

12. Foundation design recommendations and data required to completely design the foundations for the equipment package, including anchor bolt layout. Include underground conduit riser locations.

13. Factory certified drawings of the structural skid design.

14. Plans and elevations (1/4 inch scale or larger) showing the locations, size, and dimensions of all components and all required customer interfaces with the equipment package.

15. Complete piping flow diagrams.

16. Single-line and three-line diagrams showing control, instrumentation and protection devices.

17. Piping, duct and conduit layout.

18. Instrument control panel and connection box front views, internal layout, bus locations and dimensions, and interconnection wiring diagrams.

19. Assembly drawings with rigging points indicated.

20. Factory-certified horsepower, kW, power factor and fuel consumption data.

21. Engine starting battery calculations.

22. List of recommended fuel additives for extended storage and corrosion resistance:

23. Factory certified environmental data for sound and emissions.

24. Preliminary operations and maintenance manual.

25. Start-up and site test procedures.

C. Final Submittal - After responding satisfactorily to all review comments, submit record electronic and three hard copies of the above as the final submittal. This data shall be placed in the maintenance manuals in a neat and orderly manner, after revisions for "as-built"

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 5 Pre-purchase – 02/24/12 conditions have been made. A certified field service report describing start-up and on-site testing shall be furnished after start-up at the equipment.

1. Provide on CDs or DVDs all drawings as AutoCAD and as PDF files and all documents as PDF files per section 26 00 09p.

D. Manufacturer's Qualifications: Firms regularly engaged in manufacture of diesel engine-driven generator units and ancillary equipment, of types, ratings and characteristics required, whose products have been in satisfactory use in similar service for not less than 5 years.

1.7 EXTRA MATERIALS

A. Furnish under provisions indicated in Section 26 00 09p

B. Provide the following additional materials:

1. One spare set of consumables such as fuses, filters, etc.

2. One spare set of air, fuel and oil filters in addition to those to be installed after acceptance and integrated systems testing.

1.8 PROJECT RECORD DOCUMENTS

A. Submit under provisions indicated in Section 26 00 09p.

1.9 OPERATION AND MAINTENANCE DATA

A. Submit under provisions indicated in Section 26 00 09p.

1.10 WARRANTY

A. Provide under provisions indicated in Section 26 00 09p.

1.11 ALTERNATES

A. State the difference in the bid price for the engine generator set for each of the options listed below. Price shall include all incidental cost associated with the change as herein described.

B. Alternate No. 1 – Fuel Tank

1. State the differences in cost to increase the base mounted fuel tank to a size adequate to increase run time from 24 hours to 48 hours and 72 hours of run time at 100% load.

2. Include in this price any required permanent elevated platforms and stairways necessary to maintain ready access to controls and circuit breakers without portable ladders or stairs.

C. Alternate No. 2 – Generator Enclosure

1. State the difference in cost to provide a custom walk-in enclosure for the engine-generator set, in lieu of the enclosure specified.

2. The custom enclosure shall be equal to that produced by Pritchard-Brown, and shall provide a minimum reduction in sound transmission of 25 dBA in any direction.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Basis-of-Design Product: Subject to compliance with requirements provide the product indicated on the Drawings or the first listed manufacturer or product below. Subject to compliance with requirements a comparable product by one of the others listed may be acceptable:

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B. Manufacturers: Subject to compliance with requirements, provide products by the manufacturer specified:

1. Caterpillar; Engine Div. with EMCP 3.3 control panel.

2. Kohler Co.; Generator Division.

3. Onan/Cummins Power Generation; Industrial Business Group.

4. Substitutions: Under provisions of Section 26 00 09p.

2.2 ENGINE-GENERATOR SET

A. Factory-assembled and -tested, engine-generator set.

B. Mounting Frame: Maintain alignment of mounted components without depending on concrete foundation; and have lifting attachments.

1. Rigging Diagram: Inscribed on metal plate permanently attached to mounting frame to indicate location and lifting capacity of each lifting attachment and generator-set center of gravity.

C. Capacities and Characteristics:

1. Power Output Ratings: Nominal ratings as indicated on Drawings and specified under 1.1B Performance Requirements, with capacity as required to operate as a unit as evidenced by records of prototype testing.

2. Output Connections: Three-phase, four wire.

3. Nameplates: For each major system component to identify manufacturer's name and address, and model and serial number of component.

D. Generator-Set Performance:

1. Oversizing generator compared with the rated power output of the engine is permissible to meet specified performance.

a. Nameplate Data for Oversized Generator: Show ratings required by the Contract

Documents rather than ratings that would normally be applied to generator size installed.

2. Steady-State Voltage Operational Bandwidth: plus or minus 0.50 percent of rated output voltage from no load to full load.

3. Transient Voltage Performance:

a. Rated Kw at 0.9 power factor:

1) Not more than 10 percent variation for 50 percent step-load increase or decrease. Voltage shall recover and remain within the steady-state operating band within 0.5 seconds.

2) Not more than 40 percent variation for a 100 percent step load.Voltage shall recover and remain within the steady-state operating bend within 0.6 seconds.

b. Rated Kw at 0.9 power factor:

1) Not more than 10 percent variation for 50 percent step-load increase or decrease. Voltage shall recover and remain within the steady-state operating band within 0.5 seconds.

2) Not more than 40 percent variation for a 100 percent step load.Voltage shall recover and remain within the steady-state operating bend within 0.6 seconds.

4. Steady-State Frequency Operational Bandwidth: Plus or minus 0.25 percent of rated frequency from no load to full load.

5. Steady-State Frequency Stability: When system is operating at any constant load within the rated load, there shall be no random speed variations outside the steady-state operational band and no hunting or surging of speed.

6. Transient Frequency Performance:

a. Rated Kw @ 0.9 power factor:

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 7 Pre-purchase – 02/24/12

1) Less than 2-Hz variation for 50 percent step-load increase or decrease.

Frequency shall recover and remain within the steady-state operating band within two seconds.

2) Less than 5 Hz variation for a 100 percent step load.

7. Output Waveform: At no load, harmonic content measured line to neutral shall not exceed 5 percent total with no slot ripple.

8. Telephone influence factor, determined according to NEMA MG 1, shall not exceed 50 percent.

9. Sustained Short-Circuit Current: For a 3-phase, bolted short circuit at system output terminals, system shall supply a minimum of 300 percent of rated full-load current for not less than 10 seconds and then clear the fault automatically, without damage to winding insulation or other generator system components.

10. Excitation System: Performance shall be unaffected by voltage distortion caused by nonlinear loads.

a. Provide permanent magnet excitation for power source to voltage regulator.

11. Start Time: Comply with NFPA 110, Type 10, level 1 system requirements.

E. Steel Skid: To mount engine, generator, radiator and accessories - The engine/generator set and auxiliaries shall be mounted on a structural steel base. The base shall have necessary cross members, braces and lifting lugs. The base shall be designed with rigidity sufficient to resist all starting and operating forces. A hoisting diagram, showing lift points, weights and center of gravity, shall be provided.

2.3 ENGINE

A. Fuel: Ultra Low sulphur Fuel oil, Grade DF-2.

B. Rated Engine Speed: 1800 rpm.

C. Maximum Piston Speed for Four-Cycle Engines: 2250 fpm (11.4 m/s).

D. Lubrication System: The following items are mounted on engine or skid:

1. Filter and Strainer: Rated to remove 90 percent of particles 5 micrometers and smaller while passing full flow.

2. Thermostatic Control Valve: Control flow in system to maintain optimum oil temperature.

Unit shall be capable of full flow and is designed to be fail-safe.

3. Crankcase Drain: Arranged for complete gravity drainage to an easily removable container with no disassembly and without use of pumps, siphons, special tools, or appliances.

4. Provide redundant filters with valving and bypass piping to allow filters to be changed while the engine is operating.

E. Engine Fuel System:

1. Main Fuel Pump: Mounted on engine. Pump ensures adequate primary fuel flow under starting and load conditions.

2. Relief-Bypass Valve: Automatically regulates pressure in fuel line and returns excess fuel to source.

3. Fuel strainer, water separators, and filters with replaceable elements. Filters shall be in a valved bypass duplex arrangement, allowing filters to be replaced during engine operation. Similar to Raycor system.

4. DC solenoid valve for automatic fuel shut-off. Solenoid voltage compatible with engine starting battery.

5. Flexible fuel lines.

6. Auxiliary piston hand pump to prime engine fuel lines.

7. Check valve on engine fuel suction line.

8. Fuel oil cooler mounted to the radiator.

9. Provide list of recommended fuel additives for extended storage and corrosion resistance.

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 8 Pre-purchase – 02/24/12

F. Coolant Jacket Heater: Electric-immersion type, factory installed in coolant jacket system.

Comply with NFPA 110 requirements for Level 1 equipment for heater capacity.

G. Provide dual water jacket heaters with shut-off valves thermostatically controlled. Provide isolation valves for service of jacket water heaters. Heater shall be completely installed and wired at the factory. Heater shall be of sufficient size to maintain the jacket water at 110 F. in an ambient temperature of 10 F. Heater input voltage shall be 208/480 volts AC, 1 phase.

Heaters shall shut off when the engines start.

H. Governor: Adjustable isochronous, with speed sensing.

1. Furnish a governor and controller, with accessories, for each engine. Test each engine with its governor and controller.

2. The speed-governing system shall be an adjustable isochronous governor of the solid-state type equivalent to Woodward Model 2301A. The actuator and governor shall be compatible and capable of dividing the load required to operate in parallel with other units having similar governors and to maintain the specified stability without hunting, cycling or other irregularities. The governor shall include provisions for adjusting droop and speed while in operation.

3. Performance -

a. Minimum range of speed changer (% of rated speed) 15% to +5%

b. Frequency regulation (% of steady-state cycles) + 0.25%

c. Transient speed deviation (% of deviation for "sudden addition or removal of 25% load") + 3.0%

d. Time to return to stated frequency regulation after stated transient speed deviation 2 seconds

4. Equip governor with means for manual operation and adjustment.

I. Cooling System: Closed loop, liquid cooled, with radiator factory mounted on engine-generator-set mounting frame and integral engine-driven coolant pump. System shall be sized to provide adequate cooling under the provisions of paragraph 1.1B Performance Requirements.

1. Coolant: Solution of 50 percent propylene-glycol-based antifreeze and 50 percent water, with anticorrosion additives as recommended by engine manufacturer.

2. Size of Radiator: Adequate to contain expansion of total system coolant from cold start to 110 percent load condition.

3. Expansion Tank: Constructed of welded steel plate and rated to withstand maximum closed-loop coolant system pressure for engine used. Equip with gage glass and petcock.

4. Temperature Control: Self-contained, thermostatic-control valve modulates coolant flow automatically to maintain optimum constant coolant temperature as recommended by engine manufacturer.

5. Coolant Hose: Flexible assembly with inside surface of nonporous rubber and outer covering of aging-, ultraviolet-, and abrasion-resistant fabric.

a. Rating: 50-psig (345-kPa) maximum working pressure with coolant at 180 deg F (82 deg C), and noncollapsible under vacuum.

b. End Fittings: Flanges or steel pipe nipples with clamps to suit piping and equipment connections.

J. Muffler/Silencer: Critical type, sized as recommended by engine manufacturer and selected with exhaust piping system to not exceed engine manufacturer's engine backpressure requirements.

1. Minimum sound attenuation of 25 dB at 500 Hz.

2. Sound level measured at a distance of 10 feet (3 m) from exhaust discharge after installation is complete shall be 65 dBA or less.

K. Air-Intake Filter: Heavy-duty, engine-mounted air cleaner with replaceable dry-filter element and "blocked filter" indicator.

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Project 1101101 26 32 13p - 9 Pre-purchase – 02/24/12

L. Starting System: 12 or 24-DCV electric, with negative ground.

1. Components: Sized so they will not be damaged during multiple full engine-cranking cycles with ambient temperature at maximum specified in Part 1.1B "Performance Requirements" Article.

2. Cranking Motor: Heavy-duty unit that automatically engages and releases from engine flywheel without binding.

3. Provide redundant starters, and batteries

4. Provide redundant charger systems.

5. Cranking Cycle: As required by NFPA 110 for system level specified.

6. Heavy duty engine starting lead acid type

a. Battery: Adequate capacity to provide specified cranking cycle at least three times without recharging at 0 deg F (-18 deg C).

7. Battery Cable with Lugs: Size as recommended by engine manufacturer for cable length required. Include required interconnecting conductors and connection accessories.

Support all cables between terminals.

8. Battery Compartment: Factory fabricated of metal with acid-resistant finish or non-metallic and thermal insulation. Include accessories required to support and fasten batteries in place.

9. Thermostatically controlled heater shall be arranged to maintain battery above 10 deg C (50 deg F) regardless of external ambient temperature within range specified in Part 1.1B Performance Requirements.

10. Battery-Charging Alternator: Factory mounted on engine with solid-state voltage regulation and 35-A minimum continuous rating to charge batteries and power all accessories during engine operation.

11. Static Battery Charger: SENS NRG (no substitutions) with battery monitoring, current-limiting, automatic-equalizing and float-charging type. Provide parallel redundant 10A minimum battery chargers for each generator set battery bank. Generator sets incorporating two battery banks shall be provided with two charger sets separated by diodes so that a fault on one bank cannot effect the other. Units shall comply with UL 1236 and include the following features:

a. Operation: Equalizing-charging rate of 10 A shall be initiated automatically after battery has lost charge until an adjustable equalizing voltage is achieved at battery terminals. Unit shall then be automatically switched to a lower float-charging mode and shall continue to operate in that mode until battery is discharged again.

b. Automatic Temperature Compensation: Adjust float and equalize voltages for variations in ambient temperature from minus 40 deg C (-40 deg F) to plus 60 deg C (140 deg F) to prevent overcharging at high temperatures and undercharging at low temperatures.

c. Automatic Voltage Regulation: Maintain constant output voltage regardless of input voltage variations up to plus or minus 10 percent.

d. Ammeter and Voltmeter: Flush mounted in door. Meters shall indicate charging rates.

e. Safety Functions: Sense abnormally low battery voltage and close contacts providing low battery voltage indication on control and monitoring panel. Sense high battery voltage and loss of ac input or dc output of battery charger. Either condition shall close contacts that provide a battery-charger malfunction indication at system control and monitoring panel.

f. Enclosure and Mounting: NEMA 250, Type 1, wall-mounted cabinet.

g. Output current rating of at least 1/20th of ampere-hour capacity of battery. The charger shall be capable of charging a fully discharged battery without damage to the charger. It shall be capable of returning a fully discharged battery to a fully charged condition within 24 hrs.

h. Automatic and manual switching between low rate (float) and high rate (equalize) mode.

i. Automatic cut-off switch when engine generator is operating.

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j. Solid state rectifiers, DC voltmeter and ammeter, fused input and output, 120 VAC, 1 phase input and output VDC to match battery float/equalize voltage.

k. Malfunction alarm light for loss of AC voltage, low battery voltage, high battery voltage, loss of charge and battery failure or trouble. Provide two form "C" type auxiliary contacts for alarm summary remote signal.

l. Associated regulator to insure quick recharge of the batteries after an engine start.

12. Connections to battery.

13. Provide wiring to the engine control panel so all charger alarms can be transmitted to the

BMS system through the control panel Modbus interface.

2.4 GENERATOR, EXCITER, AND VOLTAGE REGULATOR

A. The generators shall be 4-pole, brushless, form or random wound, permanent magnet, revolving field type, six lead (for mounting of differential current transformers), with static exciter and SCR voltage regulator. Generators shall be direct connected to the engines through a heavy duty, flexible disc to insure permanent alignment.

B. Comply with NEMA MG 1.

C. Drive: Generator shaft shall be directly connected to engine shaft. Exciter shall be rotated integrally with generator rotor.

D. Electrical Insulation: Class H.

E. Rate of rise: Class F. 105 deg C (221 deg F) above a 40 deg C (104 deg F) ambient.

F. Stator-Winding Leads: Brought out to terminal box to permit future reconnection for other voltages if required.

G. Construction shall prevent mechanical, electrical, and thermal damage due to vibration, overspeed up to 125 percent of rating, and heat during operation at 110 percent of rated capacity.

H. Enclosure: Dripproof.

I. Instrument Transformers: Mounted within generator enclosure.

J. Voltage Regulator: Solid-state type, separate from exciter, providing performance as specified.

1. Adjusting rheostat on control and monitoring panel shall provide plus or minus 5 percent adjustment of output-voltage operating band.

2. Voltage Regulation - Include generator-mounted volts per Hertz exciter-regulator to match engine and generator characteristics, with voltage regulation ± one percent from no load to full load. Include manual controls to adjust voltage drop ± 5 percent voltage level, and voltage gain.

3. Furnish a solid-state, digital, volts per hertz 3 phase voltage regulator and accessories for each engine.

4. Provide a VAR Power Factor controller (which may be part of the voltage regulator) if paralleling with utility.

5. Performance - The voltage regulation shall be +1% from no load to full load and +0.5% frequency variation tracking RMS voltage levels. Regulator drift shall be less than 1% per 72 F. ambient temperature change. The wave form harmonic distortion shall be less than 5% total RMS and 3% for any single harmonic at full rated load with 65% non-linear load.

IEEE 519 shall be used to calculate distortion. Provide a VOLTS/HERTZ module to control voltage dip, adjustable. Provide a touchpad entry system with LED digital display and PC communications capability.

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K. Exciter: Provide brushless type exciter with the excitation system having a response ratio of not less than 0.5.

1. The exciter shall be designed and constructed to be capable of supplying, without exceeding its nameplate continuous load rating, ample field excitation when generator is operating at 115% rated power output, rated power factor, rated frequency, and 105% rated voltage.

2. Temperature rise and insulation of the exciter shall not exceed generator values given here.

3. The unit will be designed to operate at 125% of rated speed without exceeding the unit stresses.

4. Silicon diode type rotating rectifiers with series connected fuses for protection against diode failure. Provide indicating type fuses.

5. Capacity of components shall be ample enough to not curtail generator output when 20% of the rectifier units are out of service.

6. The exciter shall be air-cooled and shall be capable of operating throughout the entire load range at the specified generator design temperature.

7. The method of mounting the exciter shall be such that either its armature or field can be readily removed for ventilation and shall be designed to minimize air friction losses.

8. The excitation system shall be capable of providing 1.5 times the excitation required for the maximum rated full load condition.

L. Anti-Condensation Strip Heater: Thermostatically controlled unit arranged to maintain stator windings above dew point.

M. Windings: Optimum winding pitch for minimum total harmonic distortion and fully linked amortisseur winding.

N. Subtransient Reactance: 13 percent maximum at 125C rise.

O. Bearings - Bearings shall be pre-lubricated ball bearings with provisions for adding and/or changing grease through grease pipes extended to the generator exterior. Minimum B-10 bearing life shall be 40,000 hours for single bearing units.

P. Provide RTDs in the generator bearings and stator windings and two per phase all wired to a local terminal block and as a monitored point in the generator control panel.

2.5 CONNECTION BOX:

A. Located on right side (looking from alternator end). Load connections shall be made in minimum 50% oversized junction box. The box construction shall allow connection to the load through the top, bottom or either side of the junction box. Generator leads shall terminate in a bus detailed for connection of the incoming cables. A ground bus shall be provided for termination of incoming ground cables. Provide NEMA two hole drilling of buses for manufacturer provided long barrel two hole compression lugs with inspection holes for all conductor connection provisions.

1. The box shall be sized to accommodate terminations of nine 600 kCM copper cables per phase and a total of nine 600 kCM copper ground cables with box space for eight - four inch conduits plus space for an additional four - four inch conduits.

2. Busses - Provide NEMA two hole drilling for manufacturer supplied long barrel two hole compression lugs, with inspection holes.

3. Coordinate openings into enclosure to match connection box size and control conduits.

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2.6 CONTROL AND MONITORING

A. Automatic Starting System Sequence of Operation: When mode-selector switch on the control and monitoring panel is in the automatic position, remote-control contacts in one or more separate automatic transfer switches or switchboards, switchgear, etc. shall initiate starting and stopping of generator set. When mode-selector switch is switched to the on position, generator set starts. The off position of same switch initiates generator-set shutdown. When generator set is running, specified system or equipment failures or derangements automatically shut down generator set and initiate alarms. Operation of a remote emergency-stop switch also shuts down generator set. Mode selector switch position other than “auto” shall cause an alarm signal to be sent.

B. Configuration: Operating and safety indications, protective devices, basic system controls, and engine gages shall be grouped in a common control and monitoring panel mounted on the generator set. Mounting method shall isolate the control panel from generator-set vibration.

C. Configuration: Operating and safety indications, protective devices, basic system controls, engine gages, instrument transformers, generator disconnect switch or circuit breaker, and other indicated components shall be grouped in a combination control and power panel.

Control and monitoring section of panel shall be isolated from power sections by steel barriers.

Panel features shall include the following:

1. Wall-Mounting Cabinet Construction: Rigid, self-supporting steel unit complying with NEMA ICS 6. Power bus shall be copper. Bus, bus supports, control wiring, and temperature rise shall comply with UL 891.

2. Current and Potential Transformers: Instrument accuracy class.

D. Indicating and Protective Devices and Controls: As required by NFPA 110 for Level 1 system, and the following:

1. AC voltmeter.

2. AC ammeter.

3. AC frequency meter.

4. DC voltmeter (alternator battery charging).

5. Engine-coolant temperature gage.

6. Engine lubricating-oil pressure gage.

7. Running-time meter (non-resettable).

8. Ammeter-voltmeter, phase-selector switch(es) or push button.

9. Generator-voltage adjusting rheostat.

10. Fuel tank derangement alarm.

11. Fuel tank high-level shutdown of fuel supply alarm.

12. Generator overload.

13. Start-stop switch.

14. Overspeed shutdown device.

15. Coolant high-temperature shutdown device.

16. Coolant low-level shutdown device.

17. Oil low-pressure shutdown device.

E. Supporting Items: Include sensors, transducers, terminals, relays, and other devices and include wiring required to support specified items. Locate sensors and other supporting items on engine or generator, unless otherwise indicated.

F. Connection to Data Link: A separate terminal block, factory wired to Form C dry contacts, for each alarm and status indication is reserved for connections for data-link transmission of indications to remote data terminals. Data system connections to terminals are covered in Division 26 Section "Electrical Power Monitoring and Control."

G. Common Remote Audible Alarm: Comply with NFPA 110 requirements for Level 1 systems.

Include necessary contacts and terminals in control and monitoring panel.

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 13 Pre-purchase – 02/24/12

1. Overcrank shutdown.

2. Coolant low-temperature alarm.

3. Control switch not in auto position.

4. Battery-charger malfunction alarm.

5. Battery low-voltage alarm.

H. Remote Alarm Annunciator: Comply with NFPA 99. An LED labeled with proper alarm conditions shall identify each alarm event and a common audible signal shall sound for each alarm condition. Silencing switch in face of panel shall silence signal without altering visual indication. Connect so that after an alarm is silenced, clearing of initiating condition will reactivate alarm until silencing switch is reset. Cabinet and faceplate are surface- or flush-mounting type to suit mounting conditions indicated.

I. Remote Emergency-Stop Switch: Surface mounted on exterior of generator outdoor enclosure; and labeled. Push button shall be protected from accidental operation.

2.7 ENGINE/GENERATOR INSTRUMENTATION CONTROL PANEL

A. The control panel shall be designed and built by the engine-generator manufacturer. It shall be mounted on the generator set and incorporate 100% solid-state microprocessor based control circuitry and digital instrumentation. All electronic control components are to be mounted in sealed, dust tight, watertight, metal housings. Housings that must be opened for service or setup are not acceptable. All output circuits greater than l00mA shall be fuse or circuit breaker protected. The panel shall be labeled with ISO symbols and comply with IEC 144, IP 22, and NEMA 12 for external environmental resistance, and IP 44 and NEMA 12 for resistance of the internal sealed modules. The control panel shall be capable of facing the right, left, or rear and shall be vibration isolated.

B. The panel shall include the following equipment I functions:

1. Automatic remote start capability with mode of operation selectable from a panel-mounted 4-position switch (Stop, Manual, Automatic, Reset).

2. Cycle crank with adjustable "crank" and "rest" times.

3. Adjustable cooldown timer.

4. Emergency Stop push button requiring manual reset. Provide contacts for a remote emergency stop.

5. Voltage adjustment potentiometer to adjust voltage +10, -25% of rated.

6. A communications adapter shall be provided to allow Modbus communications between the generator set and the building BMS. Use of the adapter will allow the generator set to be remotely started or stopped and provide access to any of the engine or generator operational parameters as well as all alarms, shutdowns, or diagnostic codes. Provide any hardware or software translators required to interface to the BMS system through Modbus.

7. Individual flashing LED's shall be provided. The use of a common alarm or shutdown lamp that depend on a separate display to determine the alarm or fault condition is not acceptable. Separate LED annunciation shall be provided for:

a. Overspeed (red)

b. Overcrank (red)

c. High Coolant temperature (red)

d. Low Oil pressure (red)

e. Emergency Stop (red)

f. Low Coolant Level (red)

8. NFPA 99 alarm module with common alarm and silence switch. Separate LED annunciation shall be provided for:

a. Approach High Coolant Temperature (Amber)

b. Approach Low Oil Pressure (Amber

c. Low Water Temperature (Amber)

d. Low DC Volts (Red)

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

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e. Low Fuel (Amber)

f. Fuel Tank Rupture (Red)

g. Ground Fault (Red)

h. Generator “not in auto”.

9. Customer Interface Module

a. The engine generator shall include auxiliary dry contacts for all alarm and shutdown functions.

b. The Customer Interface Module shall be mounted at the generator terminal box.

c. Customer interface to control and alarm system through Modbus.

10. Panel illumination lights (2) with ON/OFF switch

11. Separate digital displays shall be provided for the engine and generator parameters.

These displays shall allow the simultaneous display of AC parameters and at least one (selectable) engine parameter to be displayed at the same time. Requirements for these displays are as indicated below:

a. Digital display and phase selector switch for generator operational parameters. True

RMS sensing of these parameters shall be utilized to minimize distortion due to non-linear loads and ensure accuracy.

1) AC volts (+/- 0.5% accuracy)

2) AC amps (+/- 0.5% accuracy)

3) Hertz (+1-0.3 Hz accuracy)

4) Kilowatts (Total and per phase)

5) Kilovars (Total)

6) Kilovolt – Amps KVA (Total)

7) Kilowatt – Hours KWHR (Total)

8) Kilovar – Hours KVAR-HR (Total)

9) Percent of rated power (Total)

10) Power Factor (Average Total and per phase)

b. Digital display for:

1) Engine RPM (+/- 0.5% accuracy)

2) DC voltage (+/- 0.5% accuracy)

3) Oil pressure (+/- 0.5% accuracy)

4) Coolant temperature (+/- 0.5% accuracy)

5) Operating hours

c. Diagnostic capability: Must provide dual level diagnostics identifying both system level and component level. The diagnostic codes shall be maintained in a history log specifying the number of occurrences, and second/minute/hr at which they occur.

12. Protective Relaying (Programmable trip point and time delay)

a. Overvoltage (alarm & shutdown)

b. Undervoltage (alarm & shutdown)

c. Overfrequency (alarm & shutdown)

d. Underfrequency (alarm & shutdown)

e. Overcurrent (alarm & shutdown)

f. Reverse Power (shutdown)

13. Sensors: Sensors providing a pulse width modulated output shall be utilized for oil pressure, coolant temperature sensing and shall be protected against a fault to battery.

The usable output range of the sensor shall be limited to 5% to 95% duty cycle. Output outside the usable range shall be diagnosed as a fault condition and appropriate diagnostic shall be provided. Separate speed sensing signals shall be provided for overspeed protection and electronic governor.

14. Ambient parameters:

a. operating: -40C to +70C (-40 F to +158 F)

b. storage: -55 C to +85 C (-67 F to +185 F)

c. humidity: 0 to 100% relative humidity

15. Must be impervious to salt spray, fuel, oil and oil additives, coolant, spray cleaners, chlorinated solvents, hydrogen sulfide and methane gas, and dust.

16. Provide anti-condensation heater in panel, 100W, 120V.

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

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2.8 CUSTOMER INTERFACE MODULE

A. Provide all necessary devices to permit full system integration to manufacturer’s equipment from a third party source. Supply all necessary hardware, software, documentation and connection devices required to allow access to the packaged equipment control system by other monitoring systems. The hardware shall use industry standard Modbus protocol to allow full access to equipment real-time status information through serial communications. Any proprietary protocols shall be noted and protocol documentation provided to allow integrator access to data. Communications shall operate at speeds no less than 9600 baud through industry standard EIA232, EIA485 ports.

1. Equipment shall be mounted, wired and programmed at time of equipment delivery or during installation of equipment on site. Manufacturer shall provide a factory representative during system checkout that will perform point verification with the selected systems integrator during checkout on manufacturers specific equipment.

2.9 GENERATOR OVERCURRENT AND FAULT PROTECTION

A. Generator Circuit Breaker: 1600 Molded-case, electronic-trip type; 100 percent rated;

complying with UL 489.

1. Tripping Characteristics: Adjustable long-time and short-time delay and instantaneous.

2. Trip Settings: Selected to coordinate with generator thermal damage curve.

3. Shunt Trip: Connected to trip breaker when generator set is shut down by other protective devices.

4. Mounting: Adjacent to or integrated with control and monitoring panel.

B. Generator Protector: Microprocessor-based unit shall continuously monitor current level in each phase of generator output, integrate generator heating effect over time, and predict when thermal damage of alternator will occur. When signaled by generator protector or other generator-set protective devices, a shunt-trip device in the generator disconnect switch shall open the switch to disconnect the generator from load circuits. Protector shall perform the following functions:

1. Initiates a generator overload alarm when generator has operated at an overload equivalent to 110 percent of full-rated load for 60 seconds. Indication for this alarm is integrated with other generator-set malfunction alarms.

2. Under single or three-phase fault conditions, regulates generator to 300 percent of rated full-load current for up to 10 seconds.

3. As overcurrent heating effect on the generator approaches the thermal damage point of the unit, protector switches the excitation system off, opens the generator disconnect device, and shuts down the generator set.

4. Senses clearing of a fault by other overcurrent devices and controls recovery of rated voltage to avoid overshoot.

C. Ground-Fault Indication: Comply with NFPA 70, "Emergency System" signals for ground-fault.

Integrate ground-fault alarm indication with other generator-set alarm indications.

2.10 VIBRATION ISOLATION DEVICES

A. Mounting - Provide unit with suitable spring-type vibration isolators and mount on structural steel base. The engine/generator/radiator skid shall include vibration isolation from the enclosure. Steel spring isolators shall be sized and provided in quantities determined by a qualified isolation vendor to permit a minimum static determined by a qualified vibration isolation vendor to permit a minimum static deflection of ¾ inch under operating load. The vibration isolators shall be positioned to accept the weight and weight distribution from uniform loading and deflection. Mount between engine generator set steel skid and the base fuel tank.

The vibration isolators shall incorporate a neoprene pad or cup between the base of the steel spring and the base of the isolator. Vibration isolators shall be in-housed and restrained to Mason Industries Type SLR, or as approved. Provide sufficient number so that floor-bearing

Section 26 32 13p – Engine Generators – 1000 kW - Purchase

Project 1101101 26 32 13p - 16 Pre-purchase – 02/24/12 pressure under each isolator is within floor loading specification and load per isolator is not more than 75% of isolator load rating. Provide vibration switch mounted directly to the engine block with two auxiliary dry contacts for remote annunciation.

B. Elastomeric Isolator Pads: Oil- and water-resistant elastomer or natural rubber, arranged in single or multiple layers, molded with a nonslip pattern and galvanized-steel baseplates of sufficient stiffness for uniform loading over pad area, and factory cut to sizes that match requirements of supported equipment.

1. Material: Standard neoprene.

2. Durometer Rating: 50.

3. Number of Layers: Two.

2.11 OUTDOOR GENERATOR-SET ENCLOSURE

A. Description: Prefabricated or preengineered sound attenuated enclosure with the following features:

1. Construction: Galvanized-steel, metal-clad, integral structural-steel-framed building erected on concrete foundation.

2. Structural Design and Anchorage: Comply with ASCE 7 for site conditions indicated in Section 26 00 10.

3. Louvers: Equipped with bird screen and filter arranged to permit air circulation when engine is not running while excluding exterior dust, birds, and rodents.

4. Hinged Doors: With padlocking provisions.

5. Ventilation: Louvers equipped with bird screen and filter arranged to permit air circulation while excluding exterior dust, birds, and rodents.

6. Thermal Insulation: Manufacturer's standard materials and thickness selected in coordination with space heater to maintain winter interior temperature within operating limits required by engine-generator-set components.

7. Muffler Location: Within enclosure.

B. Engine Cooling Airflow through Enclosure: Maintain temperature rise of system components within required limits when unit operates at…