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PROJECT MANUAL
REPLACE AND UPGRADE EMERGENCY GENERATOR AT DENTON DISTRICT COURT, CAROLINE COUNTY FOR THE DEPARTMENT OF GENERAL SERVICES (DGS)
DGS PROJECT NO: BC-781-130-001
DATE: June 14, 2013
Minority Business Enterprises are Encouraged to Respond to this Solicitation DEPARTMENT OF GENERAL SERVICES BOARD OF PUBLIC WORKS Alvin Collins, Secretary 301 West Preston Street, Room 1405 Baltimore, Maryland 21201
Martin O’Malley, Governor Peter Franchot, Comptroller Nancy K. Kopp, Treasurer
L.S. GRIM CONSULTING ENGINEERS 19922 Jefferson Blvd. Hagerstown, MD 21742
PROFESSIONAL CERTIFICATION The contract documents for the indicated public improvement were prepared under my supervision and to the best of my knowledge, information, and belief; they comply with the requirements of the Building code of the State of Maryland.
Consulting Engineers L.S. Grim Consulting Engineers 19922 Jefferson Blvd. Hagerstown, MD 21742 Leslie S. Grim, PE, LEED AP
___________________ Signature MD Registration No.14401
TABLE OF CONTENTS
DIVISION 0 - PROCUREMENT & CONTRACTING REQUIREMENTS -Notice to Bidders – Solicitation Fact Sheet (eMarylandMarketplace attachment) -Instructions to Bidders for Construction Projects (March 2007) (eMarylandMarketplace attachment) -General Conditions for Construction Contracts (March 2007) (eMarylandMarketplace attachment) -Bid Proposal Affidavit (eMarylandMarketplace attachment) -Contractor Questionnaire -Bid Bond, if applicable (eMarylandMarketplace attachment) -Minority Business Enterprise Utilization Procedures (November 2010) (eMarylandMarketplace attachment) -MBE Form Attachment A (eMarylandMarketplace attachment) -List of Prevailing Wage Rates, if applicable -Addenda, if any (eMarylandMarketplace attachment) -List of Drawings DIVISION 1 – GENERAL REQUIREMENTS Section 01010
Summary of Work
DIVISIONS 2 Thru 15 – (NOT USED) DIVISIONS 16 – ELECTRICAL Section 16010 Section 16060 Section 16070 Section 16100 Section 16235 Section 16400 Section 16442 Section 16496
Electrical – General Provisions Grounding and Bonding for Electrical Systems Hangers & Supports for Electrical Systems Basic Materials and Methods Emergency/Standby Power Systems Service and Distribution Panelboards Automatic Transfer Switches – Low Voltage
LIST OF DRAWINGS C-1 Cover Sheet E-1 Main Electrical Room Demolition Plan E-2 Main Electrical Room New Work Plan E-3 Overall Building Electrical Plan E-4 Site Electrical Part Plan, Site Plan
END OF TABLE OF CONTENTS
SECTION 01010 – SCOPE OF WORK PART 1 – GENERAL 1.1
RELATED DOCUMENTS A.
Drawings and general provisions of the Contract including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
1.2
PROJECT A.
The Project consists of the replacement of the existing emergency generator assembly and associated distribution equipment. As part of this project, additional equipment, existing to the building, will be added to the new emergency generator assembly. All construction must be staged so that any down time occurs during weekends only. The existing generator provides the electrical energy to energize the existing emergency lights and therefore must be operational during normal business hours.
PART 2 – PRODUCTS
(Not Applicable)
PART 3 – EXECUTION
(Not Applicable)
END OF SECTION
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SECTION 16010 - ELECTRICAL - GENERAL PROVISIONS
The General Conditions, Supplementary General Conditions, and Division 1 - General Requirements, are a part of this section. WORK INCLUDED A.
Furnish all supervision, labor, materials, tools, equipment and services, necessary and incidental to install all electrical work and related systems shown on the drawings, indicated in this specification or necessary to provide a finished installation. The finished installation shall be in perfect working condition and be ready for continuous and satisfactory operation.
B.
The following definitions shall apply: 1.
2.
C.
Where the word provide is used, in connection with a system, equipment or item, it shall be construed to mean the furnishing and installing of the system, equipment, or item. Where the phrase as directed is used, it shall be construed to mean as directed by the Architect or his authorized representative.
Work Included: The installation of the electrical systems shall include but not be limited to the following: 1. 2. 3. 4.
New service from meter to each panelboard. Electrical service, panelboards, lighting, branch wiring, and receptacles as shown on the drawings. Site Work: Including lights, wiring and conduit, pole bases, trenching and backfill. All disconnects and final equipment connections.
LOCAL CONDITIONS A.
Supports for electrical work shall be by means of securely attached fasteners adequately spaced and of type utilizing metal. Wood plugs, plastic or composition plug supports shall not be used.
PERMITS AND INSPECTIONS A. B.
Obtain and pay for all necessary drawings, permits, and certificates required by the various governing agencies having jurisdiction. Furnish and pay for both local and Fire Underwriter's certificates of inspection and approval of the work.
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CODES, STANDARDS, AND MATERIALS A.
All equipment furnished under this Specification shall be free from defects in workmanship and materials. All equipment, systems, and work shall meet the requirements published by the following organizations as minimum standards. 1. National Fire Protection Association. 2. National Electric Code, latest edition. 3. Underwriter's Laboratories, Inc. 4. National Electrical Manufacturer's Association. 5. American National Standards Institute. 6. Local Power Company Regulations. 7. Local codes and amendments.
SHOP DRAWINGS A.
Submit detailed, dimensioned shop drawings covering all items of equipment and brochures for the following: 1. Panelboards. 2. Generator Assembly. 3. Wiring devices. 4. Automatic Transfer Equipment
MINOR DEVIATIONS A.
The general arrangement of conduit, wiring, and equipment shall be as shown on the contract drawings. Detailed drawings of proposed changes because of field conditions or other causes shall be submitted to the Engineer for approval. Such changes shall be made without the additional cost to the owner. The Contractor shall carefully examine all contract drawings and shall be responsible for the proper fittings of materials and equipment in each location as indicated, without substantial alteration.
CUTTING AND PATCHING A.
All openings around cables, sleeves, etc., shall be sealed for weather and air infiltration.
B.
Saw cut all paving and concrete slabs neatly, patch to match existing. END OF SECTION
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SECTION 16060 - GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS PART 1 GENERAL 1.1
SUMMARY A.
1.2
1.3
Section Includes: 1. Wire. 2. Mechanical connectors.
REFERENCES A.
Institute of Electrical and Electronics Engineers: 1. IEEE 142 - Recommended Practice for Grounding of Industrial and Commercial Power Systems. 2. IEEE 1100 - Recommended Practice for Powering and Grounding Electronic Equipment.
B.
International Electrical Testing Association: 1. NETA ATS - Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems.
C.
National Fire Protection Association: 1. NFPA 70 - National Electrical Code. 2. NFPA 99 - Standard for Health Care Facilities.
SYSTEM DESCRIPTION A.
Grounding systems use the following elements as grounding electrodes: 1. 2. 3. 4. 5.
1.4
PERFORMANCE REQUIREMENTS A.
1.5
Existing Metal underground water pipe. Metal building frame. Concrete-encased electrode. Rod electrode. Plate electrode.
Grounding System Resistance: 5 ohms maximum.
SUBMITTALS A.
Product Data: Submit data on grounding electrodes and connections.
B.
Test Reports: Indicate overall resistance to ground and resistance of each electrode.
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1.6
CLOSEOUT SUBMITTALS A.
1.7
QUALITY ASSURANCE A.
1.8
1.9
Project Record Documents: Record actual locations of components and grounding electrodes.
Provide grounding materials conforming to requirements of NEC, IEEE 142, and UL labeled.
QUALIFICATIONS A.
Manufacturer: Company specializing in manufacturing Products specified in this section with minimum three years experience.
B.
Installer: Company specializing in performing work of this section with minimum 5 years experience.
DELIVERY, STORAGE, AND HANDLING A.
Accept materials on site in original factory packaging, labeled with manufacturer's identification.
B.
Protect from weather and construction traffic, dirt, water, chemical, and mechanical damage, by storing in original packaging.
C.
Do not deliver items to project before time of installation. Limit shipment of bulk and multiple-use materials to quantities needed for immediate installation.
PART 2 PRODUCTS 2.1
WIRE A.
Material: Stranded copper.
B.
Foundation Electrodes: 4 AWG.
C.
Grounding Electrode Conductor: Copper conductor bare.
D.
Bonding Conductor: Copper conductor bare
PART 3 EXECUTION 3.1
EXAMINATION A.
Verify final backfill and compaction has been completed before driving rod electrodes.
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3.2
PREPARATION A.
3.3
3.4
3.5
Remove surface contaminants at connection points.
EXISTING WORK A.
Modify existing grounding system to maintain continuity to accommodate renovations.
B.
Extend existing grounding system using materials and methods [compatible with existing electrical installations, or] as specified.
INSTALLATION A.
Install grounding and bonding conductors concealed from view.
B.
Bond together metal siding not attached to grounded structure; bond to ground.
C.
Bond together reinforcing steel and metal accessories in [pool] [and] [fountain] structures.
D.
Install continuous grounding using underground cold water system and building steel as grounding electrode. Where water piping is not available, install artificial station ground by means of driven rods or buried electrodes.
E.
Permanently ground entire light and power system in accordance with NEC, including service equipment, distribution panels, lighting panelboards, switch and starter enclosures, motor frames, grounding type receptacles, and other exposed non-current carrying metal parts of electrical equipment.
F.
Install branch circuits feeding isolated ground receptacles with separate insulated grounding conductor, connected only at isolated ground receptacle, ground terminals, and at ground bus of serving panel.
G.
Accomplish grounding of electrical system by using insulated grounding conductor installed with feeders and branch circuit conductors in conduits. Size grounding conductors in accordance with NEC. Install from grounding bus of serving panel to ground bus of served panel, grounding screw of receptacles, lighting fixture housing, light switch outlet boxes or metal enclosures of service equipment. Ground conduits by means of grounding bushings on terminations at panelboards with installed number 12 conductor to grounding bus.
H.
Grounding electrical system using continuous metal raceway system enclosing circuit conductors in accordance with NEC.
I.
Permanently attach equipment and grounding conductors prior to energizing equipment.
FIELD QUALITY CONTROL A.
Inspect and test in accordance with NETA ATS, except Section 4.
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B.
Grounding and Bonding: Perform inspections and tests listed in NETA ATS, Section 7.13.
C.
Perform ground resistance testing in accordance with IEEE 142.
D.
Perform leakage current tests in accordance with NFPA 99.
E.
Perform continuity testing in accordance with IEEE 142.
F.
When improper grounding is found on receptacles, check receptacles in entire project and correct. Perform retest. END OF SECTION
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SECTION 16070 - HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS PART 1 GENERAL 1.1
SUMMARY A.
1.2
Section Includes: 1. Conduit supports. 2. Formed steel channel.
REFERENCES A.
ASTM International: 1. ASTM E84 - Standard Test Method for Surface Burning Characteristics of Building Materials. 2. ASTM E119 - Standard Test Methods for Fire Tests of Building Construction and Materials. 3. ASTM E814 - Standard Test Method for Fire Tests of Through-Penetration Fire Stops. 4. ASTM E1966 - Standard Test Method for Fire-Resistive Joint Systems.
B.
FM Global: 1. FM - Approval Guide, A Guide to Equipment, Materials & Services Approved By Factory Mutual Research For Property Conservation.
C. National Fire Protection Association: 1. NFPA 70 - National Electrical Code. D. Underwriters Laboratories Inc.: 1. UL 263 - Fire Tests of Building Construction and Materials. 2. UL 723 - Tests for Surface Burning Characteristics of Building Materials. 3. UL 1479 - Fire Tests of Through-Penetration Firestops. 4. UL 2079 - Tests for Fire Resistance of Building Joint Systems. 5. UL - Fire Resistance Directory. E. 1.3
DEFINITIONS A.
1.4
Intertek Testing Services (Warnock Hersey Listed): 1. WH - Certification Listings.
Firestopping (Through-Penetration Protection System): Sealing or stuffing material or assembly placed in spaces between and penetrations through building materials to arrest movement of fire, smoke, heat, and hot gases through fire rated construction.
SUBMITTALS A.
Shop Drawings: Indicate system layout with location and detail of trapeze hangers.
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1.5 A.
Product Data: 1. Hangers and Supports: Submit manufacturers catalog data including load capacity. 2. Firestopping: Submit data on product characteristics, performance and limitation criteria.
B.
Firestopping Schedule: Submit schedule of opening locations and sizes, penetrating items, and required listed design numbers to seal openings to maintain fire resistance rating of adjacent assembly.
C. Design Data: Indicate load carrying capacity of hangers and supports. D. Manufacturer's Installation Instructions: 1. Hangers and Supports: Submit special procedures and assembly of components. 2. Firestopping: Submit preparation and installation instructions.
1.6
E.
Manufacturer's Certificate: Certify products meet or exceed specified requirements.
F.
Engineering Judgements: For conditions not covered by UL or WH listed designs, submit judgements by licensed professional engineer suitable for presentation to authority having jurisdiction for acceptance as meeting code fire protection requirements.
DELIVERY, STORAGE, AND HANDLING A.
Accept materials on site in original factory packaging, labeled with manufacturer's identification.
B.
Protect from weather and construction traffic, dirt, water, chemical, and mechanical damage, by storing in original packaging.
PART 2 PRODUCTS 2.1
CONDUIT SUPPORTS A.
Manufacturers: 1. O-Z Gedney Co or Approved equal
B.
Hanger Rods: Threaded high tensile strength galvanized carbon steel with free running threads.
C. Beam Clamps: Malleable Iron, with tapered hole in base and back to accept either bolt or hanger rod. Set screw: hardened steel. D. Conduit clamps for trapeze hangers: Galvanized steel, notched to fit trapeze with single bolt to tighten.
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2.2
E.
Conduit clamps - general purpose: One hole malleable iron for surface mounted conduits.
F.
Cable Ties: High strength nylon temperature rated to 185 degrees F (85 degrees C). Self locking.
FORMED STEEL CHANNEL A.
Manufacturers: 1. Unistrut Corp. or Approved equal
B.
Product Description: Galvanized 12 gage (2.8 mm) thick steel. With holes 1-1/2 inches (38 mm) on center.
PART 3 EXECUTION 3.1
INSTALLATION - HANGERS AND SUPPORTS A.
Anchors and Fasteners: 1. Concrete Structural Elements: Provide expansion anchors. 2. Steel Structural Elements: Provide beam clamps. 3. Concrete Surfaces: Provide expansion anchors. 4. Hollow Masonry, Plaster, and Gypsum Board Partitions: Provide toggle bolts and hollow wall fasteners. 5. Solid Masonry Walls: Provide expansion anchors 6. Sheet Metal: Provide sheet metal screws. 7. Wood Elements: Provide wood screws.
B.
Inserts: 1. Install inserts for placement in concrete forms. 2. Install inserts for suspending hangers from reinforced concrete slabs and sides of reinforced concrete beams. 3. Provide hooked rod to concrete reinforcement section for inserts carrying pipe over 4 inches (100 mm). 4. Where concrete slabs form finished ceiling, locate inserts flush with slab surface. 5. Where inserts are omitted, drill through concrete slab from below and provide through-bolt with recessed square steel plate and nut
C. Install conduit and raceway support and spacing in accordance with NEC. D. Do not fasten supports to pipes, ducts, mechanical equipment, or conduit. E.
Install multiple conduit runs on common hangers.
F.
Supports: 1. Fabricate supports from structural steel or formed steel channel. Install hexagon head bolts to present neat appearance with adequate strength and rigidity. Install spring lock washers under nuts. 2. Install surface mounted cabinets and panelboards with minimum of four anchors.
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3. 4.
In wet and damp locations install steel channel supports to stand cabinets and panelboards 1 inch (25 mm) off wall. Support vertical conduit at every [other] floor. END OF SECTION
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SECTION 16100 - BASIC MATERIALS AND METHODS
IDENTIFICATION A.
Provide typed directories for panelboards.
OUTLET BOXES A.
Provide an outlet box for each and every outlet, device, fixture, etc., called for on the drawings, specified and required by the NEC. Outlet boxes shall be of approved design, construction form, and dimension suitable for the specific location, the kind of device, fixture, etc., to be used, the number of wires used, the arrangement of conduit connected.
B.
Generally, outlet boxes concealed in construction shall be galvanized steel type. Exterior boxes shall be cast aluminum with tapped openings, cast aluminum covers, and rubber gaskets. Boxes shall be set so that the edge of the collar is flush with the finished plaster, masonry or other finished surfaces.
WIRE AND CABLES A.
Unless otherwise indicated, all wire cable for feeder and branch circuits shall be coated, soft drawn copper, and shall have 600 volt insulation. Minimum size shall be no. 12 American Wire Gauge for feeders and #14 for control circuit wiring. Conductors shall be rated 75 degrees, minimum and suitable for use in wet or dry locations.
B.
Unless otherwise noted on the drawings, general branch circuit wiring shall be copper, Type THWN cable with ground.
C.
Conceal all electrical wiring in finished areas. Where wiring is exposed in unfinished areas, it shall be in conduit, 3/4" min. Provide wiring in conduit as follows: 1. 2. 3. 4. 5. 6.
Indoors, above grade Home Runs: EMT with compression fittings. Below slab on grade: PVC In concrete: PVC Outdoors, exposed: RGS Outdoors, below grade: PVC Concealed in wall partitions only, branch circuits downstream of home run junction, "MC Cable."
WIRE CONNECTIONS AND DEVICES A.
For wire No. 10 AWG and smaller, splices shall be made with wire caps.
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PLATES A.
Provide brushed stainless steel #302 wall plates of appropriate type and size for all switches, receptacles, wiring and control devices, and signal and telephone outlets.
END OF SECTION
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SECTION 16235 - EMERGENCY/STANDBY POWER SYSTEMS
Part 1. GENERAL 1.01
Scope
A.
Provide complete factory assembled generator set equipment with digital (microprocessor-based) electronic generator set controls, digital governor, and digital voltage regulator.
B.
Provide factory test, startup by a supplier authorized by the equipment manufacturer(s), and on-site testing of the system.
C. The generator set manufacturer shall warrant all equipment provided under this section, whether or not is manufactured by the generator set manufacturer, so that there is one source for warranty and product service. Technicians specifically trained and certified by the manufacturer to support the product and employed by the generator set supplier shall service the generator sets. D. The generator set supplier shall be responsible for complete compliance to all specification requirements for both the generator set and the paralleling equipment. E. 1.02 A.
Prototype testing, factory testing, site testing. Codes and Standards The generator set installation and on-site testing shall conform to the requirements of the following codes and standards, as applicable. The generator set shall include necessary features to meet the requirements of these standards. 1. ANSI S1.13-1971—Measurement of Sound Pressure Levels in Air 2. CSA 282, 1989 Emergency Electrical Power Supply for Buildings 3. IEEE446 – Recommended Practice for Emergency and Standby Power Systems for Commercial and Industrial Applications 4. NFPA 30 – Flammable and Combustible Liquids 5. NFPA 37 – Standard For the Installation and Use of Stationary Combustion Engines and Gas Turbines 6. NFPA 70 – National Electrical Code. Equipment shall be suitable for use in systems in compliance to Article 700, 701, and 702. 7. NFPA 99 – Essential Electrical Systems for Health Care Facilities 8. NFPA 110 – Emergency and Standby Power Systems. The generator set shall meet all requirements for Level 1 systems. Level 1prototype tests required by this standard shall have been performed on a complete and functional unit, component level type tests will not substitute for this requirement.
B.
The generator set and supplied accessories shall meet the requirements of the following standards: 1. NEMA MG1-1998 part 32. Alternator shall comply with the requirements of this standard.
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2. UL142 – Sub-base Tanks 3. UL1236 – Battery Chargers 4. UL2200. The generator set shall be listed to UL2200 or submit to an independent third party certification process to verify compliance as installed. C. The control system for the generator set shall comply with the following requirements. 1. CSA C22.2, No. 14 – M91 Industrial Control Equipment. 2. EN50082-2, Electromagnetic Compatibility – Generic Immunity Requirements, Part 2: Industrial. 3. EN55011, Limits and Methods of Measurement of Radio Interference Characteristics of Industrial, Scientific, and Medical Equipment. 4. FCC Part 15, Subpart B. 5. IEC8528 part 4. Control Systems for Generator Sets 6. IEC Std 801.2, 801.3, and 801.5 for susceptibility, conducted, and radiated electromagnetic emissions. D. The generator set manufacturer shall be certified to ISO 9001 International Quality Standard and shall have third party certification verifying quality assurance in design/development, production, installation, and service, in accordance with ISO 9001. 1.03
Acceptable Manufacturers
Only approved bidders shall supply equipment provided under this contract. Equipment specifications for this project are based on microprocessor-based generator sets manufactured by Cummins Power Generation. Equipment by other suppliers that meets the requirement of this specification are acceptable, if approved not less than 2 weeks before scheduled bid date. Proposals must include a line by line compliance statement based on this specification. 1.04 A.
Submittals Shop drawings: 1. Outline drawings of assembly. 2. One line diagrams and wiring diagrams for assembly and components. 3. Interconnection wiring diagrams 4. Submit names, experience level, training certifications, and locations for technicians that will be responsible for servicing equipment at this site.
B.
Product data: 1. Technical data on all major components. Technical data must include an alternator thermal damage curve, description, and operating characteristics of the alternator protection device and an alternator reactive capability curve. 2. Certification of the emissions performance of the generator set engine by the engine manufacturer. 3. Seismic certification, as required.
C. Project information: 1. Test reports and certifications. L.S. Grim Consulting Engineers Page 15 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-130-001
2. Factory test procedures. D. Contract closeout information: 1. Operating and maintenance data. 1.05
Qualifications
A.
The generation set manufacturer shall be certified to ISO 9001 International Quality Standard and shall have third party certification verifying quality assurance in design/development, production, installation, and service, in accordance with ISO 9001.
B.
The manufacturer of this equipment shall have produced similar equipment for a minimum period of ten years. When requested by the Engineer, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.
1.06
Regulatory Requirements
A.
The generator set shall be UL2200 listed and labeled
B.
The generator set overcurrent protection shall be UL listed as a utility grade protective device.
C. The generator set engine shall comply will all applicable emissions standards at the date of installation. 1.07
Warranty
A.
The contractor shall warrant the material and workmanship of the generator set for a minimum of two (2) years from registered commissioning and start-up.
B.
The warranty shall be comprehensive. No deductibles shall be allowed for travel time, service hours, repair parts cost, etc. shall be allowed during the minimum noted warranty period described in paragraph A above.
Part 2. PRODUCTS 2.01 A.
Generator set Ratings 1. The generator set shall operate at 1800 rpm and at a voltage of: 277/480 Volts AC, Three phase, 4-wire, 60 hertz. 2. The complete generator set shall be rated per ISO8528 at 200 kW at 0.8 PF Standby rating, based on site conditions of: Altitude 50 meters, ambient temperatures of 40 degrees C and measured at the air inlet closest to the alternator for outdoor equipment. 3. The generator set rating shall be based on emergency/standby service and marked as such per NFPA110.
B.
Performance 1. Voltage regulation shall not exceed one percent for any constant load between no load and rated load for both parallel and non-parallel applications. Random voltage variation with any steady load from no load to full load shall not exceed plus or minus 0.5 percent.
2. Frequency regulation shall be isochronous from steady state no load to steady state rated load. Random frequency variation with any steady load from no load to full load shall not exceed plus or minus 0.25%. L.S. Grim Consulting Engineers Page 16 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-130-001
3. The diesel engine-generator set shall be capable of single step load pick up of 100% nameplate kW and power factor, less applicable derating factors, with the engine-generator set at operating temperature. 4. Motor starting capability shall be a minimum of 790 kVA. The generator set shall be capable of sustaining a minimum of 90% of rated no load voltage with the specified kVA load at near zero power factor applied to the generator set. 5. The alternator shall produce a clean AC voltage waveform, with not more than 5% total harmonic distortion at full linear load, when measured from line to neutral, and with not more than 3% in any single harmonic, and no 3rd order harmonics or their multiples. Telephone influence factor shall be less than 40. 6. The generator set shall be certified by the engine manufacturer to be suitable for use at the installed location and rating, and shall meet all applicable exhaust emission requirements at the time of commissioning. 7. The time required to automatically start, accelerate to rated speed and voltage, synchronize and parallel all generator sets to the system bus on a normal power failure shall not exceed 15 seconds, assuming that the generator sets are in an ambient temperature of 15C or greater, and water jacket heaters are operating properly. 8. The generator set, complete with sound attenuated enclosure, shall be tested by the generator set manufacturer per ANSI S1.13. Data documenting performance shall be provided with submittal documentation. C. Construction 1. The engine-generator set shall be mounted on a heavy-duty steel base to maintain alignment between components. The base shall incorporate a battery tray with holddown clamps within the rails. 2. All switches, lamps, and meters in the control system shall be oil-tight and dust-tight. There shall be no exposed points in the control (with the door open) that operate in excess of 50 volts. 3. All outdoor equipment shall be enclosed with corrosion-protected materials. Steel components used in enclosures shall be powder coated and baked, and shall provide fade and corrosion resistance in compliance to Dry film thickness shall be shd3363 of 2H+all a minimum of 1.8 Mils, gloss at 60degrees per ASTMD523 of 80+/- 10, pencil hardness per ASTM D3363 D. Connections 1. The generator set load connections shall be composed of silver or tin plated copper bus bars, drilled to accept mechanical or compression terminations of the number and type as shown on the drawings. Sufficient lug space shall be provided for use with cables of the number and size as shown on the drawings. 2. Power connections to auxiliary devices shall be made at the devices, with required protection located at a wall-mounted common distribution panel. 3. Generator set control interfaces to other system components shall be made on a common, permanently labeled terminal block assembly. 2.02
Engine and Engine Equipment
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A.
The engine shall be diesel, 4 cycle, radiator and fan cooled. Minimum displacement shall be 8-9 liters, with 6 cylinders. The horsepower rating of the engine at its minimum tolerance level shall be sufficient to drive the alternator and all connected accessories. Two cycle engines are not acceptable. Engine accessories and features shall include:
B.
An electronic governor system shall provide automatic isochronous frequency regulation. The governing system dynamic capabilities shall be controlled as a function of engine coolant temperature to provide fast, stable operation at varying engine operating temperature conditions. The control system shall actively control the fuel rate and excitation as appropriate to the state of the generator set. Fuel rate shall be regulated as a function of starting, accelerating to start disconnect speed, accelerating to rated speed, and operating in various isochronous or parallel states.
C. Skid-mounted radiator and cooling system rated for full load operation in 50 degrees C ambient as measured at the generator air inlet, based on 0.5 in H2O external static head. Radiator shall be sized based on a core temperature which is 10C higher than the rated operation temperature, or prototype tested to verify cooling performance of the engine/radiator/fan operation in a controlled environment. Radiator shall be provided with a duct adapter flange. The cooling system shall be filled with a 50/50-ethylene glycol/water mixture by the equipment manufacturer. Rotating parts shall be guarded against accidental contact. D. Electric starters capable of three complete cranking cycles without overheating. E.
Positive displacement, mechanical, full pressure, lubrication oil pump.
F.
Full flow lubrication oil filters with replaceable spin-on canister elements and dipstick oil level indicator.
G. An engine driven, mechanical, positive displacement fuel pump. Fuel filter with replaceable spin-on canister element. Fuel cooler, suitable for operation of the generator set at full rated load in the ambient temperature specified shall be provided if required for operation due to the design of the engine and the installation. H. Replaceable dry element air cleaner with restriction indicator. I.
Flexible supply and return fuel lines.
J.
Engine mounted battery charging alternator, 40-ampere minimum, and solid-state voltage regulator.
K.
Coolant heater 1. Engine mounted, thermostatically controlled, coolant heater(s) for each engine. Heater voltage shall be as shown on the project drawings. The coolant heater shall be UL499 listed and labeled. 2. The coolant heater shall be installed on the engine with SAEJ20 compliant materials. Steel tubing shall be used for connections into the engine coolant system wherever the length of pipe run exceeds 12 inches. The coolant heater installation shall be specifically designed to provide proper venting of the system. The coolant heaters shall be installed using isolation valves to isolate the heater for replacement of the heater element. The design shall allow the heater element to be replaced without draining the engine cooling system or significant coolant loss. 3. The coolant heater shall be provided with a 24VDC thermostat, installed at the engine thermostat housing. An AC power connection shall be provided for a single AC power
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connection to the coolant heater system. 4. The coolant heater(s) shall be sized as recommended by the engine manufacturer to warm the engine to a minimum of 40C in a 15C ambient, in compliance with NFPA110 requirements, as a minimum, or the temperature required for starting and load pickup requirements of this specification. L.
Provide vibration isolators, spring/pad type, quantity as recommended by the generator set manufacturer. Isolators shall include seismic restraints if required by site location.
M. Starting and Control Batteries shall be lead acid type, 24 volt DC, sized as recommended by the engine manufacturer for compliance to NFPA110 starting requirements, complete with battery cables and connectors. N. Provide exhaust silencer(s) for each engine of size and type as recommended by the generator set manufacturer and approved by the engine manufacturer. The mufflers shall be critical grade. Exhaust system shall be installed according to the engine manufacturer’s recommendations and applicable codes and standards. O. Provide 1 fully regulated, constant voltage, current limited, multi-rate battery charger(s) for each generator set. The chargers shall be designed for heavy-duty industrial service, primarily to quickly recharge and maintain batteries that start internal combustion engines. Charger shall be rated a minimum of 12 amps, and be capable of operating in parallel with another like charger for reliability and added charging capacity. 1. Charger shall provide 4 distinct charge states: “dead battery”, “bulk charge”, “absorption”, and “float”. Charge rate shall be temperature compensated to provide proper charging in ambient conditions from –20 to +55C. 2. Provider LED indication of general charger condition, including charging, fault, and equalize. Provide a 2 line LCD display to indicate charge rate, battery voltage, faults, and provide for charger set up. Charger shall provide relay contacts for fault conditions as required by NFPA110. 3. The charger shall operate properly during fault conditions, including battery disconnection while charging, reversed battery polarity connections, and shorted battery. 4. The charger shall be compliant to the same RFI/EMI and voltage surge performance as are specified for the genset control. P.
Provide a 336 gallon capacity, dual wall construction, sub base fuel tank for each generator set. Provide alarms for low fuel and tank rupture. Provide an area in the tank for conduit stub up.
2.03 A.
Low Voltage AC Alternator The AC alternator shall be; synchronous, four pole, 2/3 pitch, brushless, revolving field, drip-proof construction, single prelubricated sealed bearing, air cooled by a direct drive centrifugal blower fan, and directly connected to the engine with flexible drive disc. The alternator design shall prevent shaft current from flowing and eliminate the need for insulated bearings. All insulation system components shall meet NEMA MG1 requirements for Class H insulation systems. Actual temperature rise measured by resistance method at full load shall not exceed 105 C in a 40 C ambient.
B.
The alternator shall be capable of delivering rated output (kVA) at rated frequency and
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power factor, at any voltage up to 5 percent above or below rated voltage. C. The alternator shall be supplied with an dedicated, independent power source for the voltage regulation system, which provides sufficient excitation for the alternator to supply 300% of rated output current for 10 seconds. D. The subtransient reactance of the alternator shall not exceed 12 percent, based on the standby rating of the generator set. E.
Provide an anti-condensation heater for the alternator for generator sets installed outdoors or in unheated environments.
F.
Provide two embedded resistance temperature detectors per phase and temperature indication equipment. The control system shall annunciate high alternator temperature as a fault condition.
2.04 Generator set Control. The generator set shall be provided with a microprocessor-based control system that is designed to provide automatic starting, monitoring, and protection and control functions for the generator set. The control system shall also be designed to allow local monitoring and control of the generator set, and remote monitoring and control as described in this specification. The control shall be mounted on the generator set. The control shall be vibration isolated and prototype tested to verify the durability of all components in the system under the vibration conditions encountered. The generator set mounted control shall include the following features and functions: A.
Control Switches 1. Mode Select Switch. The mode select switch shall initiate the following control modes. When in the RUN or Manual position the generator set shall start, and accelerate to rated speed and voltage as directed by the operator. In the OFF position the generator set shall immediately stop, bypassing all time delays. In the AUTO position the generator set shall be ready to accept a signal from a remote device to start and accelerate to rated speed and voltage. 2. EMERGENCY STOP switch. Switch shall be Red "mushroom-head" push-button. Depressing the emergency stop switch shall cause the generator set to immediately shut down, and be locked out from automatic restarting. The switch shall include a lockout provision for use in safely disabling the generator set for necessary service. 3. RESET switch. The RESET switch shall be used to clear a fault and allow restarting the generator set after it has shut down for any fault condition. 4. PANEL LAMP switch. Operating the panel lamp switch shall cause the entire panel to be lighted with DC control power. The panel lamps shall automatically be switched off 10 minutes after the switch is operated, or after the switch is operated a second time.
B.
Generator Set AC Output Metering. The generator set shall be provided with a metering set including the following features and functions: a)
Analog voltmeter, ammeter, frequency meter, and kilowatt (KW) meter. Voltmeter and ammeter shall display all three phases. Ammeter and KW meter scales shall be color coded in the following fashion: readings from 0-90% of generator set standby rating: green; readings from 90-100% of standby rating: amber; readings in excess of
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100%: red. b)
Digital metering set, 0.5% accuracy, to indicate generator RMS voltage and current, frequency, output current, output KW, KW-hours, and power factor. Generator output voltage shall be available in line-to-line and line-to-neutral voltages, and shall display all three phase voltages (line to neutral or line to line) simultaneously.
C. Generator Set Alarm and Status Display. 1. The generator set shall be provided with alarm and status indicating lamps to indicate non-automatic generator status, and existing warning and shutdown conditions. The lamps shall be high-intensity LED type. The lamp condition shall be clearly apparent under bright room lighting conditions. The generator set control shall indicate the existence of all alarm, shutdown, and status conditions associated with the generator set, including all paralleling control functions and the engine ECM on an alphanumerical display on the genset. The following alarm, shutdown, and status conditions are required, as a minimum: low oil pressure (alarm) low oil pressure (shutdown) oil pressure sender failure (alarm) low coolant temperature (alarm) high coolant temperature (alarm) high coolant temperature (shutdown) engine temperature sender failure (alarm) low coolant level (alarm or shutdown--selectable) fail to crank (shutdown) fail to start/overcrank (shutdown) overspeed (shutdown) low DC voltage (alarm) high DC voltage (alarm) weak battery (alarm) low fuel-daytank (alarm) high AC voltage (shutdown) low AC voltage (shutdown) under frequency (shutdown) over current (warning) over current (shutdown) short circuit (shutdown) ground fault (alarm) over load (alarm) emergency stop (shutdown) 2. Provisions shall be made for indication of four customer-specified alarm or shutdown conditions. Labeling of the customer-specified alarm or shutdown conditions shall be of the same type and quality as the above specified conditions. The non-automatic indicating lamp shall be red, and shall flash to indicate that the generator set is not able to automatically respond to a command to start from a remote location. D. Engine Status Monitoring. 1. The following information shall be available from a digital status panel on the generator set control: engine oil pressure (psi or kPA) L.S. Grim Consulting Engineers Page 21 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-130-001
engine coolant temperature (degrees F or C) engine oil temperature (degrees F or C) engine speed (rpm) number of hours of operation (hours) number of start attempts battery voltage (DC volts) 2. The control system shall also incorporate a data logging and display provision to allow logging of a minimum of the last 20 warning or shutdown indications on the generator set, the time of the last fault of each type, and the number of faults of each type, and total time of operation at various loads as a percent of the standby rating of the generator set. E.
Engine Control Functions. 1. The control system provided shall include a cycle cranking system, which allows for user selected crank time, rest time, and # of cycles. Initial settings shall be for 3 cranking periods of 15 seconds each, with 15-second rest period between cranking periods. 2. The control system shall include an engine governor control, which functions to provide steady state frequency regulation as noted elsewhere in this specification. The governor control shall include adjustments for gain, damping, and a ramping function to control engine speed and limit exhaust smoke while the unit is starting. The governor control shall be suitable for use in paralleling applications without component changes. 3. The control system shall include time delay start (adjustable 0-300 seconds) and time delay stop (adjustable 0-600 seconds) functions. 4. The control system shall include sender failure monitoring logic for speed sensing, oil pressure, and engine temperature which is capable of discriminating between failed sender or wiring components, and an actual failure conditions. 5. The control system shall include all interfaces necessary for proper operation with the paralleling equipment provided under this contract.
F.
Alternator Control Functions: 1. The generator set shall include an automatic microprocessor-based voltage regulation system that is matched and prototype tested by the engine manufacturer with the governing system provided. It shall be immune from misoperation due to load-induced voltage waveform distortion and provide a pulse width modulated output to the alternator exciter. The voltage regulation system shall be equipped with three-phase RMS sensing and shall control buildup of AC generator voltage to provide a linear rise and limit overshoot. The voltage regulation system shall be based on a full wave rectified input, pulse-width modulated output design. The system shall include a torque-matching characteristic, which shall reduce output voltage in proportion to frequency below an adjustable frequency threshold. The voltage regulator shall include adjustments for gain, damping, and frequency roll-off. Adjustments shall be broad range, and made via digital raise-lower switches, with an alphanumeric LED readout to indicate setting level. Rotary potentiometers for system adjustments are not acceptable. 2. Controls shall be provided to monitor the output current of the generator set and initiate an alarm (over current warning) when load current exceeds 110% of the rated current of the generator set on any phase for more than 60 seconds. The controls shall shut
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down and lock out the generator set when output current level approaches the thermal damage point of the alternator (over current shutdown). The protective functions provided shall be in compliance to the requirements of NFPA70 article 445. 3. Controls shall be provided to individually monitor all three phases of the output current for 1, 2, or 3-phase short circuit conditions. The control/protection system shall monitor the current level and voltage. The controls shall shut down and lock out the generator set when output current level approaches the thermal damage point of the alternator (short circuit shutdown). 4. Controls shall be provided to monitor the KW load on the generator set, and initiate an alarm condition (over load) when total load on the generator set exceeds the generator set rating for in excess of 5 seconds. Controls shall include a load shed control, to operate a set of dry contacts (for use in shedding customer load devices) when the generator set is overloaded. 5. An AC over/under voltage monitoring system that responds only to true RMS voltage conditions shall be provided. The system shall initiate shutdown of the generator set when alternator output voltage exceeds 110% of the operator-set voltage level for more than 10 seconds, or with no intentional delay when voltage exceeds 130%. Under voltage shutdown shall occur when the output voltage of the alternator is less than 85% for more than 10 seconds. 6. A battery monitoring system shall be provided which initiates alarms when the DC control and starting voltage is less than 25VDC or more than 32 VDC. During engine cranking (starter engaged), the low voltage limit shall be disabled, and if DC voltage drops to less than 14.4 volts for more than two seconds a "weak battery" alarm shall be initiated. 7. The control System shall include a ground fault monitoring relay. The relay shall be adjustable from 3.8-1200 amps, and include adjustable time delay of 0-10.0 seconds. The relay shall be for indication only, and not trip or shut down the generator set. Note bonding and grounding requirements for the generator set, and provide relay that will function correctly in system as installed. 8. The voltage regulation system shall include provisions for reactive load sharing without voltage droop and electronic voltage matching for paralleling applications. Motorized voltage adjust pot is not acceptable for voltage matching. G. The generator set shall be provided with a network communication module to allow real time communication with the generator set control by remote devices. The control shall communicate all engine and alternator data; alarm, shutdown, and status conditions; and allow starting and stopping of the generator set via the network in both test and emergency modes. H. Provide and install a 20-light LED type remote alarm annunciator with horn, located as shown on the drawings or in a location that can be conveniently monitored by facility personnel. The remote annunciator shall provide all the audible and visual alarms called for by NFPA Standard 110 for level 1 systems; and in addition shall provide indications for high battery voltage, low battery voltage, loss of normal power to the charger. Spare lamps shall be provided to allow future addition of other alarm and status functions to the annunciator. Provisions for labeling of the annunciator in a fashion consistent with the specified functions shall be provided. Alarm silence and lamp test switch (es) shall be provided. LED lamps shall be replaceable, and indicating lamp color shall be capable of changes needed for specific application requirements. Alarm horn shall be switchable L.S. Grim Consulting Engineers Page 23 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-130-001
for all annunciation points. Alarm horn (when switched on) shall sound for first fault, and all subsequent faults, regardless of whether first fault has been cleared, in compliance with NFPA110 3-5.6.2. I.
The generator set shall be provided with a utility grade protective relay, designed to provide thermal overload protection for the alternator, and performance certified for that purpose by a 3rd party testing organization. The supplier shall submit time overcurrent characteristic curves and thermal damage curve for the alternator, demonstrating the effectiveness of the protection provided. Relay shall be installed to allow shutdown of the generator excitation system on an alternator overload condition, with the engine operating for a cool-down period before shutdown. The relay shall not include an instantaneous trip function.
J.
Control Interfaces for Remote Monitoring: 1. No field connections for control devices shall be made in the AC power output enclosure. Provide the following features in the control system: 2. Form "C" dry contact set rated 2A @ 30VDC to indicate existence of any alarm or shutdown condition on the generator set. 3. One set of contacts rated 2A @ 30VDC to indicate generator set is ready to load. The contacts shall operate when voltage and frequency are greater than 90% of rated condition. 4. A fused 10 amp switched 24VDC power supply circuit shall be provided for customer use. DC power shall be available from this circuit whenever the generator set is running. 5. A fused 20 amp 24VDC power supply circuit shall be provided for customer use. DC power shall be available from this circuit at all times from the engine starting/control batteries. 6. The control shall be provided with a direct serial communication link for the communication network interface as described elsewhere in this specification and shown on the drawings.
Part 3. OTHER REQUIREMENTS 3.01
Prototype Testing (submit evidence of prototype testing; manufacturer’s certificate etc.)
3.02
Factory Testing.
A.
The generator set manufacturer shall perform a complete operational test on the generator set prior to shipping from the factory. A certified test report shall be provided. All testing shall be performed with calibrated metering.
B.
Factory testing may be witnessed by the owner and consulting engineer. Costs for travel expenses will be the responsibility of the owner and consulting engineer. Supplier is responsible to provide two weeks notice for testing.
C. Generator set factory tests on the equipment shall be performed at rated load and rated power factor. Generator sets that have not been factory tested at rated power factor will not be acceptable. Tests shall include: D. Make these bullets: run at full load, maximum power, voltage regulation, transient and steady-state governing, single step load pickup, and function of safety shutdowns. L.S. Grim Consulting Engineers Page 24 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-130-001
3.03
Installation
A.
Equipment shall be installed by the contractor in accordance with final submittals and contract documents. Installation shall comply with applicable state and local codes as required by the authority having jurisdiction. Install equipment in accordance with manufacturer's instructions and instructions included in the listing or labeling of UL listed products.
B.
Installation of equipment shall include furnishing and installing all interconnecting wiring between all major equipment provided for the on-site power system. The contractor shall also perform interconnecting wiring between equipment sections (when required), under the supervision of the equipment supplier.
C. Equipment shall be installed on concrete housekeeping pads. Equipment shall be permanently fastened to the pad in accordance with manufacturer’s instructions and seismic requirements of the site. D. Equipment shall be initially started and operated by representatives of the manufacturer. All protective settings shall be adjusted as instructed by the consulting engineer. E.
All equipment shall be physically inspected for damage. Scratches and other installation damage shall be repaired prior to final system testing. Equipment shall be thoroughly cleaned to remove all dirt and construction debris prior to initial operation and final testing of the system.
F.
On completion of the installation by the electrical contractor, the generator set supplier shall conduct a site evaluation to verify that the equipment is installed per manufacturer’s recommended practice.
3.04
On-Site Acceptance Test:
A.
The complete installation shall be tested to verify compliance with the performance requirements of this specification following completion of all site work. Testing shall be conducted by representatives of the manufacturer, with required fuel supplied by Contractor. The Engineer shall be notified in advance and shall have the option to witness the tests. The generator set manufacturer shall provide a site test specification covering the entire system. Tests shall include:
B.
Prior to start of active testing, all field connections for wiring, power conductors, and bus bar connections shall be checked for proper tightening torque.
C. Installation acceptance tests to be conducted on-site shall include a "cold start" test, a two hour full load (resistive) test, and a one step rated load pickup test in accordance with NFPA 110. Provide a resistive load bank and make temporary connections for full load test, if necessary. D. Perform a power failure test on the entire installed system. This test shall be conducted by opening the power supply from the utility service, and observing proper operation of the system for at least 2 hours. Coordinate timing and obtain approval for start of test with site personnel. E. 3.05 A.
The generator set supplier shall issue a test report documenting the results of testing, and including a complete list of all settings in the control system. Training The equipment supplier shall provide training for the facility operating personnel covering operation and maintenance of the equipment provided. The training program shall be
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not less than 4 hours in duration and the class size shall be limited to 5 persons. Training date shall be coordinated with the facility owner. 3.06
Service and support
A.
The generator set supplier shall maintain service parts inventory for the entire power system at a central location which is accessible to the service location 24 hours per day, 365 days per year. The inventory shall have a commercial value of $3 million or more. The manufacturer of the generator set shall maintain a central parts inventory to support the supplier, covering all the major components of the power system, including engines, alternators, control systems, paralleling electronics, and power transfer equipment.
B.
The generator set shall be serviced by a local service organization that is trained and factory certified in generator set service. The supplier shall maintain an inventory of critical power system replacement parts in the local service location. Service vehicles shall be stocked with critical replacement parts. The service organization shall be on call 24 hours per day, 365 days per year. The service organization shall be physically located within 50 miles of the site.
C. The manufacturer shall maintain model and serial number records of each generator set provided for at least 20 years.
END OF SECTION
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SECTION 16400 - SERVICE AND DISTRIBUTION
SERVICE DESCRIPTION A.
Principal electrical distribution within the building and outside the building shall be as indicated on the plans.
PANELBOARDS A. B.
Panelboards shall be Cutler-Hammer with cover, door and ground bar or approved equal by Square-D or Siemens. Provide an aluminum nameplate, (Seton #2065-30-PA, 3 line), for exterior panels or a Seton Ply nameplate, (Seton #2060-30-PA, 3 line), for Interior panels, labeling the panel callout, voltage and amperage.
END OF SECTION
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SECTION 16442 ……………………………………………………………………PANELBOARDS PART 1 GENERAL 1.1
1.2
SUMMARY A.
Section includes distribution and branch circuit panelboards, electronic grade branch circuit panelboards.
B.
Related Sections: 1. Section 16060 - Grounding and Bonding for Electrical Systems. 2. Section 16075 - Identification for Electrical Systems.
REFERENCES A.
Institute of Electrical and Electronics Engineers: 1. IEEE C62.41 - Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits.
B.
National Electrical Manufacturers Association: 1. NEMA AB 1 - Molded Case Circuit Breakers and Molded Case Switches. 2. NEMA FU 1 - Low Voltage Cartridge Fuses. 3. NEMA ICS 2 - Industrial Control and Systems: Controllers, Contactors, and Overload Relays, Rated Not More Than 2000 Volts AC or 750 Volts DC. 4. NEMA ICS 5 - Industrial Control and Systems: Control Circuit and Pilot Devices. 5. NEMA KS 1 - Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts Maximum). 6. NEMA PB 1 - Panelboards. 7. NEMA PB 1.1 - General Instructions for Proper Installation, Operation, and Maintenance of Panelboards Rated 600 Volts or Less.
C. International Electrical Testing Association: 1. NETA ATS - Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems. D. National Fire Protection Association: 1. NFPA 70 - National Electrical Code. E.
1.3
Underwriters Laboratories Inc.: 1. UL 67 - Safety for Panelboards. 2. UL 1283 - Electromagnetic Interference Filters. 3. UL 1449 - Transient Voltage Surge Suppressors.
SUBMITTALS A.
Shop Drawings: Indicate outline and support point dimensions, voltage, main bus ampacity, integrated short circuit ampere rating, circuit breaker and fusible switch arrangement and sizes.
B.
Product Data: Submit catalog data showing specified features of standard products.
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1.4
1.5
CLOSEOUT SUBMITTALS A.
Project Record Documents: Record actual locations of panelboards and record actual circuiting arrangements.
B.
Operation and Maintenance Data: Submit spare parts listing; source and current prices of replacement parts and supplies; and recommended maintenance procedures and intervals.
QUALIFICATIONS A.
Manufacturer: Company specializing in manufacturing products specified in this section with minimum three years [documented] experience.
PART 2 PRODUCTS 2.1
DISTRIBUTION PANELBOARDS A.
Manufacturers: 1. Square D, Siemens, or Approved equal.
B.
Product Description: NEMA PB 1, circuit breaker type panelboard.
C. Panelboard Bus: Copper current carrying components, ratings as indicated on Drawings. Furnish copper ground bus in each panelboard. D. Minimum integrated short circuit rating: 100,000 amperes rms symmetrical for 240/208 volt panelboards; 100,000 amperes rms symmetrical for 480 volt panelboards, or as indicated on Drawings. E.
Molded Case Circuit Breakers: NEMA AB 1, circuit breakers with integral thermal and instantaneous magnetic trip in each pole. Furnish circuit breakers UL listed as Type HACR for air conditioning equipment branch circuits.
F.
Molded Case Circuit Breakers with Current Limiters: NEMA AB 1, circuit breakers with replaceable current limiting elements, in addition to integral thermal and instantaneous magnetic trip in each pole.
G. Enclosure: NEMA PB 1, Type 1. H. Cabinet Front: Surface door-in-door type, fastened with finished in manufacturer's standard gray enamel. I.
Product Description: NEMA PB1, circuit breaker type, lighting and appliance branch circuit panelboard.
J.
Panelboard Bus: Copper current carrying components, ratings as indicated on Drawings. Furnish copper ground bus in each panelboard.
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K.
Minimum Integrated Short Circuit Rating: 22,000 amperes rms symmetrical for 240 volt panelboards; 65,000 amperes rms symmetrical for 480 volt panelboards, or as indicated on Drawings.
L.
Molded Case Circuit Breakers: NEMA AB 1, [bolt-on] [plug-on] type thermal magnetic trip circuit breakers, with common trip handle for all poles, listed as Type SWD for lighting circuits, Type HACR for air conditioning equipment circuits, Class A ground fault interrupter circuit breakers as indicated on Drawings. Do not use tandem circuit breakers.
M. Current Limiting Molded Case Circuit Breakers: NEMA AB 1, circuit breakers with integral thermal and instantaneous magnetic trip in each pole, coordinated with automatically resetting current limiting elements in each pole. Interrupting rating 100,000 symmetrical amperes, let-through current and energy level less than permitted for same size NEMA FU 1, Class RK-5 fuse. N. Enclosure: NEMA PB 1, Type 1. O. Cabinet Front: Surface cabinet front with concealed trim clamps, concealed hinge, metal directory frame, and flush lock keyed alike. Finish in manufacturer's standard gray enamel. PART 3 EXECUTION 3.1
EXISTING WORK A.
Disconnect abandoned panelboards. Remove abandoned panelboards.
B.
Maintain access to existing panelboard remaining active and requiring access. Modify installation or provide access panel.
C. Clean and repair existing panelboards to remain or to be reinstalled. 3.2
INSTALLATION A.
Install panelboards in accordance with NEMA PB 1.1.
B.
Install panelboards plumb.
C. Install recessed panelboards flush with wall finishes. D. Height: 6 feet (1800 mm) to top of panelboard; install panelboards taller than 6 feet (1800 mm) with bottom no more than 4 inches (100 mm) above floor. E.
Install filler plates for unused spaces in panelboards.
F.
Provide typed circuit directory for each branch circuit panelboard [and load center]. Revise directory to reflect circuiting changes to balance phase loads.
G. Ground and bond panelboard enclosure. Connect equipment ground bars of panels in accordance with NFPA 70. L.S. Grim Consulting Engineers Page 30 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-130-001
3.3
FIELD QUALITY CONTROL A.
Inspect and test in accordance with NETA ATS, except Section 4.
B.
Perform circuit breaker inspections and tests listed in NETA ATS, Section 7.6.
C. Perform switch inspections and tests listed in NETA ATS, Section 7.5. D. Perform controller inspections and tests listed in NETA ATS, Section 7.16.1. END OF SECTION
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SECTION 16496 - AUTOMATIC TRANSFER SWITCHES – LOW VOLTAGE
PART 1 1.01
GENERAL
SCOPE A. Furnish and install the low voltage automatic transfer switches having the ratings, features/accessories, and enclosures as specified herein and as shown on the contract drawings.
1.02
RELATED SECTIONS
1.03
REFERENCES A. The automatic transfer switches and all components shall be designed, manufactured and tested in accordance with the latest applicable standards of UL and NEMA as follows: 1. UL 1008 – Transfer Switches 2. UL 991 - Tests for Safety-Related Controls Employing Solid-State Devices 3. NFPA 70 – National Electrical Code 4. NFPA 99 – Essential Electrical Systems of Health Care Facilities 5. NFPA 110 – Emergency and Standby Power Systems 6. NEMA ICS 10 – AC Transfer Switch Equipment 7. IEEE 446 – Recommended Practice for Emergency and Standby Power Systems
1.04
SUBMITTALS – FOR REVIEW/APPROVAL A. The following information shall be submitted to the Engineer: 1. Front view and plan view of the assembly 2. Schematic diagram 3. Conduit space locations within the assembly. 4. Assembly ratings including: a. Withstand and Closing rating b. Voltage c. Continuous current rating d. Short-Time rating if applicable e. Short-circuit rating if ordered with integral protection 5. Cable terminal sizes 6. Product Data Sheets. B. Where applicable, the following additional information shall be submitted to the Engineer: 1. Busway connection 2. Connection details between close-coupled assemblies
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3. Composite front view and plan view of close-coupled assemblies 1.05
SUBMITTALS – FOR CONSTRUCTION A. The following information shall be submitted for record purposes: 1. Wiring diagrams 2. Certified production test reports 3. Installation information 4. Seismic certification as specified B. The final (as-built) drawings shall include the same drawings as the construction drawings and shall incorporate all changes made during the manufacturing process.
1.06
QUALIFICATIONS A. The manufacturer of the assembly shall be the manufacturer of the major components within the assembly. B. For the equipment specified herein, the manufacturer shall be ISO 9001 or 9002 certified. C. The manufacturer of this equipment shall have produced similar electrical equipment for a minimum period of five (5) years. When requested by the Engineer, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.
1.07
REGULATORY REQUIREMENTS A. Provide a certificate of compliance with UL 1008 for the transfer switches furnished under this section.
1.08
DELIVERY, STORAGE AND HANDLING A. Equipment shall be handled and stored in accordance with manufacturer’s instructions. One (1) copy of these instructions shall be included with the equipment at time of shipment.
1.09
FIELD MEASUREMENTS
1.10
OPERATION AND MAINTENANCE MANUALS A. Equipment operation and maintenance manuals shall be provided with each assembly shipped, and shall include instruction leaflets and instruction bulletins for the complete assembly and each major component.
1.11
EXTRA PRODUCTS
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PART 2 2.01
PRODUCTS
MANUFACTURERS A. Eaton / Cutler-Hammer products B. Cummins Power C. Square D The listing of specific manufacturers above does not imply acceptance of their products that do not meet the specified ratings, features, and functions. Manufacturers listed above are not relieved from meeting these specifications in their entirety. Products in compliance with the specification and manufactured by others not named will be considered only if pre-approved by the engineer ten (10) days prior to bid date.
2.02
RATINGS A. The transfer switch shall have equal 3 second withstand; closing and interrupting ratings of 65 kAIC at 480 volts. Wording used other then short-time rating is not recognized by UL1008. B. The transfer switch shall be 100% equipment rated for continuous duty. C. The voltage rating of the transfer switch shall be no less than the system voltage rating. The continuous current rating of the transfer switch shall be no less than the maximum continuous current requirements of the system. D. The transfer switch shall be 100% equipment rated for continuous duty as shown on the drawings and shall conform to the applicable requirements of UL 1008 for emergency system total load. E. The automatic transfer switches shall be fully rated to protect all types of loads, inductive and resistive, from loss of continuity of power, without derating, either open or enclosed.
2.03
CONSTRUCTION A. Switches rated 30-1000 Amps shall be Wall Mount construction. B. Switches rated 800-5000 Amps shall be Floor Mounted construction. C. The switching panel shall consist of completely enclosed contact assemblies and a separate control or transformer panel. Control power for all transfer operations shall be derived from the line side of the source to which the load is being transferred. D. Each transfer switch shall be positively interlocked both mechanically and electrically to prevent simultaneous closing of both sources under either automatic or manual operation. Main contacts shall be mechanically locked in position in both normal and emergency positions. E. Transfer switches shall be capable of being operated manually under full rated load conditions. Manual operation shall be accomplished by a permanently attached manual operator, or by integrally mounted pushbuttons. Removable manual operating handles, and handles that may move in the event of an electrical operation
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during the manual operation, are not acceptable. Manual operators requiring source or load disconnection prior to manual operation are not acceptable. F. On transfer switches requiring a fourth pole for switching the neutral, the neutral shall be fully rated with equal withstand, closing and interrupting ratings to the power poles. Switched neutral poles which are add-on or overlap, or that are not capable of breaking full rated load current are not acceptable. G. The transfer switch shall have a multi-tap voltage selection plug for ease of voltage adjustment in the field. H. Where shown on the drawings, transfer switches applied as service entrance equipment shall be provided with over-current trip units and a service entrance label. A key-operated selector switch shall be provided to disconnect the power supplies. Indicators shall be provided to show the availability of each source as well as breakers in a disconnected position. Provide a neutral disconnect link for three-pole solid neutral switches, and a neutral-to-ground main bonding jumper for all switches to meet UL service entrance requirements. Ground fault protection shall be provided for all switches rated 1000 amperes or more applied on 480Y/277 Vac systems in accordance with NEC Article 230-95. I.
2.04
Where indicated on the drawings, the transfer switches shall be provided with a draw-out mechanism to allow easy access for preventive maintenance, testing, or inspection. The draw-out mechanism shall provide visual indicators as to the position of the switch/breaker during the draw-out operation.
MICROPROCESSOR-BASED CONTROLLER (OPEN TRANSITION) A. References 1. The automatic transfer switch controllers shall meet or exceed the following standards in addition to the basic switch standards: a. IEC 61000-4-2 - EMC Testing and Measurement Techniques - Electrostatic Discharge Immunity Test b. IEC 61000-4-3 - EMC Testing and Measurement Techniques - Radiofrequency, Electromagnetic Field Immunity Test c. IEC 61000-4-4 - EMC Testing and Measurement Techniques - Electrical Fast Transient/Burst Immunity Test d. IEC 61000-4-5 - EMC Testing and Measurement Techniques - Surge Immunity Test e. IEC 61000-4-6 - EMC Testing and Measurement Techniques - Immunity to Conducted Disturbances, Induced by Radio-frequency Fields f. IEC 61000-4-11 - EMC Testing and Measurement Techniques - Voltage Dips, Short Interrupts and Voltage Variations Immunity Tests g. CISPR11, Class A - Industrial, Scientific and Medical Radio-frequency Equipment - Electromagnetic Disturbance Characteristics - Limits and Methods of Measurement h. FCC Part 15, Subpart B, Class A
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B. For contactor switches: 1. The microprocessor-based logic controller shall be door mounted and shall provide the operator with an overview of the transfer switch status, parameters, and diagnostic data. The controller shall have a voltage range of 0-790 volts (50/60 Hz) and an accuracy of +/- 1% of nominal input voltage. The controller shall have a frequency range of 40-70 Hz and an accuracy of +/- .3 Hz. Control power input range from 65 VAC – 145 VAC RMS 50/60 Hz. The controller shall be listed under UL Standard 1008 and shall be Cutler-Hammer type ATC-300 or approved equal. 2. The microprocessor-based logic controller shall have an operating environmental range of: a. Operation –20C to +70C degrees b. Storage –30C to +85C degrees c. Relative Humidity (Non-Condensing) 0-95% C. The microprocessor-based controller display shall be UV resistant and include a backlit LCD display, 2-line, 16 character and shall display the following: 1. Connected Source voltages on all phases 2. Connected Source frequency 3. Real time clock for Time / Date stamp 4. Historical data 5. Programming and set point information 6. Password entry 7. Timer countdown for each timer while functioning 8. Help function for detailed description of displayed messages D. The microprocessor-based controller shall include five (5) individual LED’s for indicating the following: 1. Unit Status 2. Mimic Diagram showing Availability status of NORMAL source. 3. Mimic Diagram showing Availability status of EMERGENCY source. 4. Mimic Diagram showing Connection status of NORMAL source. 5. Mimic Diagram showing Connection status of EMERGENCY source. E. The microprocessor-based controller shall contain the following features: 1. Password programming protection 2. Set points shall be stored in Non-Volatile memory, and use of an external battery source to maintain operation during “dead” periods shall not be required 3. Historical Data Storage to include: a. Engine Run Time b. NORMAL source Available time c. EMERGENCY source Available time d. NORMAL source Connected time e. EMERGENCY source Connected time L.S. Grim Consulting Engineers Page 36 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-080-003
f. g. h. i. j. k.
LOAD Energized Time Number of Transfers Date, Time and Reason for Last Sixteen (16) transfers Monitor Mode Event Fail Safe Event Aborted Test
F. The microprocessor-based controller shall contain the following voltage and frequency features: 1. The voltage of each phase of the NORMAL source and the EMERGENCY source shall be monitored, with under-voltage dropout adjustable from 50% to 97% of nominal and pickup adjustable from dropout setting +/-2% to 99% of nominal. 2. The frequency of the NORMAL source and the EMERGENCY source shall be monitored, with under-frequency dropout adjustable from 90% to 97% of nominal and pickup adjustable from dropout setting +1 Hz to 99% of nominal. G. The microprocessor-based controller shall contain the following time delay features: 1. A time delay shall be provided on transfer to EMERGENCY source, adjustable from 0 to 1800 seconds. TDNE – Time Delay Normal to Emergency 2. A time delay shall be provided to override a momentary power outage or voltage fluctuation, adjustable from 0 to 120 seconds. TDES – Time Delay engine start. 3. A time delay shall be provided on retransfer from EMERGENCY source to NORMAL source, adjustable from 0 to 1800 seconds. TDEN – Time Delay Emergency to Normal. 4. A time delay shall be provided after retransfer that allows the generator to run unloaded prior to shutdown, adjustable form 0 to 1800 seconds. TDEC – Time Delay Engine Cool down. 5. A time delay shall be provided for engine failure to start, fixed setting of 6 seconds. TDEF – Time Delay Engine Fail. 6. An In-Phase transition, which will permit a transfer or re-transfer between the NORMAL and EMERGENCY sources that have a phase angle difference of 8 degrees or less. Feature to include a permissible frequency difference and synchronization time set points. The adjustable frequency difference shall be 0.00 to 3.0 Hz. 7. All delays shall be field adjustable from the microprocessor-based controller without the use of special tools. H. The microprocessor-based controller shall contain the following features, pushbuttons and selector switches: 1. “HELP”, “INCREASE”, “DECREASE”, “DISPLAY SELECT” and “STEP”” pushbuttons 2. Plant exerciser, selectable – 7 interval, adjustable 0-600 minutes, load or no load with Failsafe 3. System Test Pushbutton 4. Bypass Time Delay Emergency to Normal (TDEN) Pushbutton L.S. Grim Consulting Engineers Page 37 of 39 Replace and Upgrade Emergency Generator, Denton District Court, Caroline County-BC-781-080-003
5. Bypass Time Delay Normal to Emergency (TDNE) Pushbutton I.
The microprocessor-based controller shall contain the following input/output contacts: 1. One (1) Form A contact for closure of the Generator start circuit. The contacts shall be of silver alloy with gold flashing. The contacts shall be rated for 5-Amp at 250-Vac and 5-Amp at 30-Vdc. 2. One (1) Form C contact for NORMAL Source Position. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc. 3. One (1) Form C contact for EMERGENCY Source Position. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc. 4. One (1) Form C contact for PRE-TRANSFER SIGNAL. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc. 5. One (1) Form C contact for ALARM SIGNAL. The contacts shall be rated for 10Amp at 250-Vac and 10-Amp at 30-Vdc. 6. Two (2) Form A contacts for CONTROL. The contacts shall be rated for 10-Amp at 250-Vac and 10-Amp at 30-Vdc.
2.05
MICROPROCESSOR LOGIC A. The controller shall be hardened against potential problems from transients and surges. Operation of the transfer switch and monitoring of both sources shall be managed by the controller. B. Microprocessor-Based Controller
2.06
WIRING/TERMINATIONS A. Terminal blocks shall conform to NEMA ICS 4. Terminal facilities shall be arranged for entrance of external conductors from the top or bottom of the enclosure. The main transfer switch terminals shall be suitable for the termination of conductors shown on the plans.
2.06
POWER SWITCHING DEVICE – 30-1000 AMP WALL MOUNT MOLDED CASE SWITCH TYPE A. Switching devices for 30 through1000 Amp Wall Mount transfer switches shall be molded case switches or circuit breakers. Frame ratings shall be 150, 225, 400, 600, 800, 1200 amperes. All breakers shall be UL listed for application in their intended enclosures for 100% of their continuous ampere rating.
2.07
ENCLOSURE A. Each transfer switch shall be provided in a NEMA 1 enclosure suitable for use in environments indicated in the drawings.
2.08
FINISH A. NEMA 1, 12 or 3R enclosures shall be painted with the manufacturer’s standard light gray ANSI 61.paint. NEMA 4 or 4X shall be stainless steel, non-painted.
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PART 3
EXECUTION
3.01
EXAMINATION
3.02
FACTORY TESTING A.
The following standard factory tests shall be performed on the equipment provided under this section. All tests shall be in accordance with the latest version of UL and NEMA standards. 1. Insulation check to ensure the integrity of insulation and continuity of the entire system 2. Visual inspection to ensure that the switch matches the specification requirements and to verify that the fit and finish meet quality standards 3. Mechanical tests to verify that the switch's power sections are free of mechanical hindrances 4. Electrical tests to verify the complete electrical operation of the switch and to set up time delays and voltage sensing settings of the logic
B. The manufacturer shall provide three (3) certified copies of factory test reports. 3.03
TRAINING
A. The contractor shall provide a training session for up to five (5) owner’s representatives for one hour. 3.04
INSTALLATION
A. The contractor shall install all equipment per the manufacturer’s recommendations and the contract drawings. B. All necessary hardware to secure the assembly in place shall be provided by the contractor. C. The equipment shall be installed and checked in accordance with the manufacturer’s recommendations. 3.05
FIELD SERVICE ORGANIZATION
A. The manufacturer of the ATS shall also have a national service organization that is available throughout the contiguous United States and is available on call 24 hours a day, 365 days a year. END OF SECTION
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