DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS
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Rev 19JUN09 j:\Projects\Active\com-deca_design_criteria_revisions-04071\Guide Specifications\TJG Innformation
SECTION 16231
PACKAGED ENGINE GENERATORS
Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.
PART 1. GENERAL
1.1 RELATED DOCUMENTS
1.1.1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division1 Specification Sections, apply to this Section.
1.2 SUMMARY
1.2.1. This Section includes packaged diesel-engine generator sets with the following features and accessories:
Adjust list below to suit Project. Delete second subparagraph for gas-fueled engines.
1.2.1.1. Battery charger.
1.2.1.2. Day tank.
1.2.1.3. Engine-generator set.
1.2.1.4. Muffler.
1.2.1.5. Exhaust piping external to set.
1.2.1.6. Outdoor enclosure.
1.2.1.7. Remote annunciator.
1.2.1.8. Remote stop switch.
1.2.1.9. Starting battery.
1.2.2. Related Sections include the following:
List below only products, construction, and equipment that the reader might expect to find in this Section but are specified elsewhere.
1.2.2.1. Division16 Section "Transfer Switches" for transfer switches including sensors and relays to initiate automatic-starting and -stopping signals for engine-generator sets.
1.3 DEFINITIONS
Retain abbreviation and terms that remain after this Section has been edited.
1.3.1. Operational Bandwidth: The total variation from the lowest to highest value of a parameter over the range of conditions indicated, expressed as a percentage of the nominal value of the parameter.
1.3.2. Steady-State Voltage Modulation: The uniform cyclical variation of voltage within the operational bandwidth, expressed in Hertz or cycles per second.
1.4 SUBMITTALS
1.4.1. Product Data: Include the following:
1.4.1.1. Data on features, components, accessories ratings, and performance.
1.4.1.2. Thermal damage curve for generator.
1.4.1.3. Time-current characteristic curves for generator protective device.
1.4.2. Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.
1.4.2.1. Dimensioned outline plan and elevation drawings of engine-generator set and other components specified.
1.4.2.2. Design Calculations: Signed and sealed by a qualified professional engineer. Calculate requirements for selecting vibration isolators and seismic restraints and for designing vibration isolation bases.
1.4.2.3. Vibration Isolation Base Details: Signed and sealed by a qualified professional engineer. Detail fabrication, including anchorages and attachments to structure and to supported equipment. Include base weights.
1.4.2.4. Wiring Diagrams: Power, signal, and control wiring.
Retain paragraph below if procedures for welder certification are retained in "Quality Assurance" Article.
1.4.3. Welding certificates.
Retain paragraph and subparagraphs below if required by seismic criteria applicable to Project. Coordinate with Division16 Section "Seismic Controls for Electrical Work."
Delete option in paragraph below if day tank is not used or if engine is gas fueled.
1.4.4. Manufacturer Seismic Qualification Certification: Submit certification that day tank,engine-generator set, batteries, battery racks, accessories, and components will withstand seismic forces defined in Division16 Section "Seismic Controls for Electrical Work." Include the following:
1.4.4.1. Basis for Certification: Indicate whether withstand certification is based on actual test of assembled components or on calculation.
Retain one of first two subparagraphs below to define the term "withstand" as it applies to this Project. Definition varies with type of building and occupancy and is critical to valid certification. Second definition is used for essential facilities where equipment must operate immediately after an earthquake. Use the second definition for units serving remote commissaries in areas of high seismic probability.
a. The term "withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified."
b. The term "withstand" means "the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the unit will be fully operational after the seismic event."
1.4.4.2. Dimensioned Outline Drawings of Equipment Unit: Identify center of gravity and locate and describe mounting and anchorage provisions.
1.4.4.3. Detailed description of equipment anchorage devices on which the certification is based and their installation requirements.
Coordinate paragraph below with qualification requirements in Division1 Section "Quality Requirements" and as supplemented in "Quality Assurance" Article.
1.4.5. Qualification Data: For Installer and testing agency.
See Editing Instruction No.3 in the Evaluations for discussion about prototype-unit testing.
1.4.6. Certified summary of prototype-unit test report.
1.4.7. Certified Test Reports: For components and accessories that are equivalent, but not identical, to those tested on prototype unit.
Retain first paragraph below for generator sets specified to meet performance requirements and for generator sets serving sensitive loads.
1.4.8. Certified Summary of Performance Tests: Demonstrate compliance with specified requirement to meet performance criteria for sensitive loads.
1.4.9. Test Reports:
1.4.9.1. Report of factory test on units to be shipped for this Project, showing evidence of compliance with specified requirements.
1.4.9.2. Report of sound generation.
Normally delete subparagraph below. See Evaluations.
1.4.9.3. Report of exhaust emissions showing compliance with applicable regulations.
Retain subparagraph below if Contractor is responsible for field quality-control testing.
1.4.9.4. Field quality-control test reports.
1.4.10. Certification of Torsional Vibration Compatibility: Comply with NFPA110.
1.4.11. Operation and Maintenance Data: For packaged engine generators to include in emergency, operation, and maintenance manuals. In addition to items specified in Division1 Section ‘Phase Turnover and Contract Closeout," include the following:
1.4.11.1. List of tools and replacement items recommended to be stored at the Project for ready access. Include part and drawing numbers, current unit prices, and source of supply.
1.4.12. Warranty: Special warranty specified in this Section.
1.5 QUALITY ASSURANCE
1.5.1. Installer Qualifications: Manufacturer's authorized representative who is trained and approved for installation of units required for this Project.
Revise subparagraph below to suit Project location.
1.5.1.1. Maintenance Proximity: Not more than [four] <Insert number> hours' normal travel time from Installer's place of business to Project site.
Delete subparagraph below if Contractor is not required to assume responsibility for engineering.
1.5.1.2. Engineering Responsibility: Preparation of data for vibration isolators and seismic restraints of engine skid mounts, including Shop Drawings, based on testing and engineering analysis of manufacturer's standard units in assemblies similar to those indicated for this Project.
1.5.2. Manufacturer Qualifications: A qualified manufacturer. Maintain, within [200 miles] <Insert number of miles> of Project site, a service center capable of providing training, parts, and emergency maintenance repairs.
1.5.3. Source Limitations: Obtain packaged generator sets and auxiliary components through one source from a single manufacturer.
Retain paragraph below to allow drawing details based on one manufacturer's product to establish requirements and still allow competition. Coordinate with Division1 requirements.
1.5.4. Product Options: Drawings indicate size, profiles, and dimensional requirements of packaged generator sets and are based on the specific system indicated. Refer to Division1 Section "Product Requirements."
Retain first paragraph below if welding is required. Delete "and cooling" option if generator does not have remote radiator. Retain "Welding certificates" Paragraph in "Submittals" Article if retaining paragraph.
1.5.5. Welding: Qualify procedures and personnel according to ASME Boiler and Pressure Vessel Code: SectionIX for welding exhaust-system piping.
1.5.6. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA70, Article100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.
1.5.7. Comply with NFPA37.
1.5.8. Comply with NFPA70.
Retain paragraph below if generator is automatically started. See Editing Instruction No.4 in the Evaluations.
1.5.9. Comply with NFPA110 requirements for Level[1] [2] emergency power supply system.
Retain paragraph below for state or local compliance. Edit to suit Project.
1.5.10. Engine Exhaust Emissions: Comply with applicable state and local government requirements.
Retain below for installations with critical noise-abatement requirements, particularly outdoor generator sets. Coordinate with noise-reduction features in the design, including those relating to cooling-air intake and discharge arrangement and muffler specification and its location and orientation as shown on Drawings.
1.5.11. Noise Emission: Comply with [applicable state and local government requirements] <Insert other Project criteria> for maximum noise level at [adjacent property boundaries] <Insert other critical locations> due to sound emitted by generator set including engine, engine exhaust, engine cooling-air intake and discharge, and other components of installation.
1.6 COORDINATION
1.6.1. Coordinate size and location of concrete bases. Cast anchor-bolt inserts into bases. Concrete, reinforcement, and formwork requirements are specified in Division3.
1.7 WARRANTY
When warranties are required, verify with Owner's counsel that special warranties stated in this Article are not less than remedies available to Owner under prevailing local laws. Coordinate with Division1 Section "Product Requirements."
1.7.1. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of packaged engine generators and associated auxiliary components that fail in materials or workmanship within specified warranty period.
Verify available warranties for units and components.
1.7.1.1. Warranty Period: Five years from date of Substantial Completion.
1.8 MAINTENANCE SERVICE
Retain this Article for critical installations and consider including a provision for submitting a continuing maintenance agreement proposal. Revise starting date if required. Obtain a copy of maintenance agreement before retaining or editing below. Maintenance contracts may not be allowed for publicly funded projects.
1.8.1. Initial Maintenance Service: Beginning at Substantial Completion, provide [12] <Insert number> months' full maintenance by skilled employees of manufacturer's designated service organization. Include quarterly exercising to check for proper starting, load transfer, and running under load. Include routine preventive maintenance as recommended by manufacturer and adjusting as required for proper operation. Maintenance agreements shall include parts and supplies as used in manufacture and installation of original equipment.
1.9 EXTRA MATERIALS
Extra materials may not be allowed for publicly funded projects.
1.9.1. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.
Quantities below are examples only. Revise subparagraphs to suit Project.
1.9.1.1. Fuses: One for every 10 of each type and rating, but not less than one of each.
1.9.1.2. Indicator Lamps: Two for every six of each type used, but not less than two of each.
1.9.1.3. Filters: One set each of lubricating oil, fuel, and combustion-air filters.
PART 2. PRODUCTSÉ
2.1 MANUFACTURERS
See Editing Instruction No.1 in the Evaluations for cautions about naming manufacturers and products.
2.1.1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:
2.1.1.1. Caterpillar; Engine Div.
2.1.1.2. Generac Power Systems, Inc.
2.1.1.3. Kohler Co; Generator Division.
2.1.1.4. MagneTek, Inc.
2.1.1.5. Onan Corp./Cummins Power Generation; Industrial Business Group.
2.1.1.6. Spectrum Detroit Diesel.
2.1.1.7. Insert manufacturer's name.
2.2 ENGINE-GENERATOR SET
2.2.1. Packaged engine-generator set shall be a coordinated assembly of compatible components.
Coordinate first paragraph below with prototype test requirements in Part1 "Submittals" Article and in Part2 "Source Quality Control" Article.
2.2.2. Power Output Ratings: Nominal ratings as indicated, with capacity as required to operate as a unit as evidenced by records of prototype testing.
2.2.3. Output Connections: Three phase, four wire.
2.2.4. Safety Standard: Comply with ASMEB15.1.
2.2.5. Nameplates: Each major system component shall be equipped with a nameplate to identify manufacturer's name and address, and model and serial number of component.
Retain first paragraph below for projects in seismic areas.
2.2.6. Fabricate engine-generator-set mounting frame and attachment of components to resist generator-set movement during a seismic event when generator-set mounting frame is anchored to building structure.
2.2.7. Mounting Frame: Adequate strength and rigidity to maintain alignment of mounted components without depending on concrete foundation. Mounting frame shall be free from sharp edges and corners and shall have lifting attachments arranged for lifting with slings without damaging components.
Delete below for units where rigging is not required.
2.2.7.1. 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.
2.3 GENERATOR-SET PERFORMANCE FOR SENSITIVE LOADS
Retain this Article for loads involving sensitive electronic equipment, significant nonlinear load elements, or uninterruptible power supply systems. Coordinate with "Governor" and "Generator, Exciter, and Voltage Regulator" articles. See Evaluations.
2.3.1. Meet ISO 8528-5 G3 requirements. Oversizing generator compared with the rated power output of the engine is permissible to meet specified performance.
2.3.1.1. Nameplate Data for Oversized Generator: Show ratings required by the Contract Documents rather than ratings that would normally be applied to generator size installed.
2.3.2. Steady-State Voltage Operational Bandwidth: +/- 2 percent of rated output voltage from no load to full load.
2.3.3. Steady-State Voltage Modulation Frequency: Less than 1 Hz.
2.3.4. Transient Voltage Performance: 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 second.
2.3.5. Steady-State Frequency Operational Bandwidth: Plus or minus 0.25 percent of rated frequency from no load to full load.
2.3.6. 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.
2.3.7. Transient Frequency Performance: Less than 5.0% 2-Hz variation for a 50 percent step-load increase or decrease. Frequency shall recover and remain within the steady-state operating band within three seconds.
2.3.8. Output Waveform: At no load, harmonic content measured line to neutral shall not exceed 2 percent total with no slot ripple. The telephone influence factor, determined according to NEMAMG1, shall not exceed 50 percent.
2.3.9. Sustained Short-Circuit Current: For a 3-phase, bolted short circuit at system output terminals, the 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.
2.3.10. Excitation System: Performance shall be unaffected by voltage distortion caused by nonlinear load.
Below requires 10-second maximum start time under specific conditions and includes startup only, not load assumption. Retain, delete, or revise to suit Project.
2.3.11. Start Time: Comply with NFPA110, Type10, system requirements.
2.4 SERVICE CONDITIONS
2.4.1. Environmental Conditions: Engine-generator system shall withstand the following environmental conditions without mechanical or electrical damage or degradation of performance capability:
Retain first option in subparagraph below if generator-set start time must be within NFPA110 limits. This temperature range usually implies installation indoors in heated space. Coordinate with Drawings.
2.4.1.1. Ambient Temperature: [5 to 40 degC] [Minus 15 to plus 40 degC].
Delete first subparagraph below for outdoor units.
2.4.1.2. Relative Humidity: 0 to 95 percent.