HICK-SPV-481413.ECIP_2.pdf

HICK-SPV-481413.ECIP 2.DOCX 481413-1

SECTION 481413 - SOLAR ENERGY COLLECTORS

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section specifies Solar Energy Systems as indicated by Drawings and schedules, and is here by defined to include, but not by way of limitation, photovoltaic modules, monitoring system, mounting equipment, and accessories. Installation of the Photovoltaic array involves mechanically mounting the modules, attaching the electrical interconnection, and checking performance.

B. Related Work Specified Elsewhere:

1. SECTION 133420 - PRE-ENGINEERED METAL CANOPY FOR PHOTOVOLTAIC

SYSTEM.

2. SECTION 133421 - PRE-ENGINEERED METAL STRUCTURE FOR GROUND

MOUNTED PHOTOVOLTAIC SYSTEM.

3. SECTION 260000 - BASIC ELECTRICAL REQUIREMENTS.

4. SECTION 260526 - GROUNDING AND BONDING.

5. SECTION 260533 - RACEWAYS, BOXES, SLEEVES, SEALS AND FITTINGS FOR

ELECTRICAL SYSTEMS.

6. SECTION 260553 - ELECTRICAL IDENTIFICATION.

7. SECTION 481916 - STATIC INVERTER.

1.02 REFERENCES:

A. NFPA 70 National Electric Code.

B. Underwriters Laboratory (UL):

1. 498 - Standard for Safety of Attachment Plugs and Receptacles.

2. 746C - Polymeric Materials - Use in Electrical Equipment Evaluations.

3. 854 - Service Entrance Cables.

4. 1703 - Standard of Safety of Flat-Plate Photovoltaic Modules and Panels.

5. 1977 - Standard for Safety of Component Connectors Used for Data, Signal, and Power

Equipment Applications.

6. 4703 - Photovoltaic Wire.

C. International Electrotechnical Commission (IEC):

1. 61215 - Crystallic Silicon Terrestrial Photovoltaic (PV) Modules.

2. 61730-1 - Photovoltaic (PV) module safety qualification - PART 1 - Requirements for construction.

3. 61730-2 - Photovoltaic (PV) module safety qualification - PART 2 - Requirements for testing.

1.03 COORDINATION:

A. The Contractor shall coordinate the system requirements with other divisions and contractors as necessary to undertake the work described.

1.04 ABBREVIATIONS:

A. kWh - Kilowatt Hour.

B. kWp - Kilowatt Peak.

C. STC - Standard Test Conditions.

D. ADC - Amps Direct current.

E. VDC - Volts Direct Current.

F. AC - Alternating Current.

SECTION 481413 - SOLAR ENERGY COLLECTORS: continued

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G. NOCT - Nominal Operation Cell Temperature.

H. STC - Standard Test Conditions.

1.05 CONTRACTOR QUALIFICATIONS:

A. Contractor shall be trained and certified with manufacturer components. Contractor shall submit personnel qualified to perform the work based on overall electrical experience

B. Contractor shall be NABCEP certified or demonstrate equal experience.

C. Contractor shall provide Licensed PE with a seal to stamp final Drawings.

1.06 SUBMITTALS:

A. Refer to DIVISION 01 and SECTION 260000 - BASIC ELECTRICAL REQUIREMENTS for administrative and procedural requirements for submittals. Submittals are subject to approval by both the HIANG and HECO. Products are not permitted until accepted by both HECO and the HIANG.

B. Includes but not limited to, the following:

1. Product Data:

a. Submit Manufacturer's data on Photovoltaic Modules and components. Include manufacturer's standard product warranty, for duration of not less than 3 years, for replacement of materials and equipment used in photovoltaic module. Module shall also include performance warranty for minimum of 80% of STC rating at 20 years.

b. Submit Manufacturer's data on Combiner box and components. Include manufacturer's standard product warranty.

c. Submit Manufacturer's data on Structural racking design. Include all structural calculations for approval.

2. Shop Drawings: Submit dimensioned drawings of photovoltaic modules and accessories including, but not limited to, wireway, cabling, structural mounting details and data, and connector information. Drawings shall list weights, clearances, disconnects for equipment isolation, field connection points, and nameplate data.

3. Wiring: Submit wiring diagrams for Photovoltaic Modules, Connectors, and Grounding.

Clearly differentiate between portions of wiring that are manufacturer factory installed and portions that are field installed. Include all control and communication wiring.

4. Agreement to Maintain: Prior to time of final acceptance, the installer shall submit four copies of an Agreement for continued service and maintenance of photovoltaic array for

Owner's possible acceptance. Offer terms and conditions for furnishing parts and providing continued testing and servicing, including replacement of materials and equipment for a one-year period with an option for renewal of the Agreement by Owner.

5. Certifications: Provide photovoltaic module certified test record of the following final production tests.

a. Module Power Output at STC and NOCT.

b. UL and IEC testing.

c. Flash test results shall be provided with module delivery.

d. Voltage and Current Output at STC, IV Curve.

e. Short circuit and open circuit information.

f. All module standard testings listed to PART 1.02 of this Specification where applicable.

6. PV Syst (or approved equal) array performance model.

7. Provide proposed mounting system and drawings including rack details, for approval prior to installation.

8. Operation and maintenance manuals.

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9. Factory and all field test data.

10. Contractor Qualifications and certificates

11. Interconnection Agreement with utility.

a. Contractor is responsible for coordinating interconnection agreement with HECO.

Contractor shall complete the necessary documentation and work with Joint Base to receive approval.

b. Interconnection agreement must be approved by HECO prior to construction unless otherwise directed by HIANG.

1.07 DELIVERY, STORAGE, AND HANDLING:

A. Only accept materials on site in original factory packaging, labeled with manufacturer's identification.

B. All products shall be stored in a protected area and handled with care.

C. Before delivery modules shall be inspected and tested for output voltage, cracks, defects, and discoloration.

D. Modules shall be stored in original container, or approved equal, until installation date. While in storage provide sign on container reading:

WARNING: SHOCK HAZARD! ELECTRICAL GENERATING

PRODUCT. IF STORED IN LIGHTED AREA OR IN SUNLIGHT

PRODUCT IS ELECTRIFIED.

PART 2 - PRODUCTS

2.01 PHOTOVOLTAIC MODULES:

A. General: Except as otherwise indicated. Provide modules and ancillary components of types, sizes, and ratings indicated, which comply with manufacturer's standard materials and with the design and construction in accordance with published product information. Where types, sizes, and ratings are not indicated, comply with NEC, UL, and established industry standards for those applications indicated.

B. Provide framed Mono or Poly-Crystalline module.

C. Modules shall have minimum of 2 bypass diodes.

D. Photovoltaic module wiring, connections, and terminations:

1. Modules shall be equipped with minimum 12 AWG, single core, XLP USE-2 copper cables with lockable quick connect terminations for module string connections, or approved equal.

2. Connectors shall comply with UL 498 and UL 1977 - and NEC.

E. Modules shall be UL 1703 and CEC listed and comply with IEC 61215.

F. Module junction box shall comply with UL 746C.

G. Modules shall have a STC power rating tolerance of 0% to +10%.

2.02 COMBINERS:

A. Combiner Box with Integral finger-safe fuses, and non-fused Disconnect Switch (600Vdc).

Provide combiner box(s) complete with circuitry as necessary to protect the equipment including disconnect switch with finger-safe fuse holders having all necessary fusing and other options, as shown on Drawings and listed below:

1. A finger-safe, non-fused disconnect is required and it shall be interlocked to prevent the opening of the cover when the switch is in the ON position. Interlock shall be defeatable for testing purposes. Handle must be lockable in OFF position.

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2. The combiner box shall be arranged to have between 4 and 24 input circuits with a 30A, 60A, 75A, 150A or 250A non-fused disconnect switch rating.

3. Provide photovoltaic rated fuses. Fuses shall be rated 600Vdc and be sized per module manufacturer's recommendation.

4. All fuse holders shall be finger-safe and shall have local open-fuse indication.

5. The enclosure shall be NEMA 3R, stainless steel with seamless door gaskets for combiner boxes with an integral disconnect. Enclosure shall be lockable.

6. All busing shall be copper.

7. The combiner box shall have 90°C field wireable output terminations.

8. Equipment shall have a nameplate installed and mounted to the front cover and indicate, at a minimum: Number of input circuits, ampere rating of input circuits, voltage rating, short-circuit current rating, and integrated disconnect ampere rating if provided.

9. Provide surge suppression UL listed for photovoltaic array installations. Surge suppression shall be located within enclosure.

2.03 STRUCTURAL RACKING:

A. Photovoltaic Structural Racking system

1. Racking shall be designed per structural requirements listed in SECTION 133420 and

SECTION 133421.

2. Provide PV rail system. Rail shall secure photovoltaic module to structure and be rated for wind load. A clip and rail system shall not be used. The modules shall slide into the rail.

3.2. Provide all necessary structure for mounting the modules at the angle as detailed in

Drawings including but not limited to building penetrations, support structure, and ballasts.

4.3. Provide separation for dissimilar metals.

5.4. Provide structural calculations for approval in accordance with SECTION 133420 and

SECTION 133421.

6.5. Rack system must be certified by manufacturer and Guaranteed for performance on-site.

Manufacturer shall provide 3-year Warranty, for Parts and Maintenance.

B. Materials and Finish: Material and finish specifications for each strut type are as follows:

1. Aluminum: Strut shall be manufactured of extruded aluminum alloy 6063-T6. All fittings and hardware shall be zinc plated according to ASTM B633 (SC3 for fittings, SC1 for threaded hardware).

2. Pre-galvanized Steel: Strut shall be made from steel meeting the minimum mechanical properties of ASTM A653 SS, Grade 33, and mill galvanized in accordance with coating designation G90. Fittings shall be manufactured from steel meeting the minimum requirements of ASTM A907 SS, Grade 33. All fittings and hardware shall be zinc plated in accordance with ASTM B633 (SC3 for fittings, SC1 for threaded hardware).

3. Hot-dip Galvanized Steel: Strut shall be made from steel meeting the minimum mechanical properties of ASTM A1011 SS, Grade 33 and shall be hot-dip galvanized after fabrication in accordance with ASTM A123. Fittings shall be manufactured from steel meeting the minimum requirements of ASTM A907 SS, Grade 33, and hot-dip galvanized after fabrication in accordance with ASTM A123. All hardware shall be stainless steel Type 316 or chromium zinc ASTM F1136 Gr. 3. All hot-dip galvanized after fabrication products must be returned to point of manufacture after coating for inspection and removal of all sharp burrs.

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PART 3 - EXECUTION

3.01 INSTALLATION OF PHOTOVOLTAIC ARRAY:

A. Install Photovoltaic modules as indicated, in accordance with the equipment manufacturer's written instructions, and with recognized industry practices, to ensure that modules fulfill requirements.

B. Coordinate with other work, including raceways, electrical boxes, fittings, and accessories, as necessary to interface installation of photovoltaic array with other work.

C. Tighten connectors and terminals, including screws and bolts, in accordance with equipment manufacturer's published torque tightening values for equipment connectors. Where manufacturer's torquing requirements are not indicated, tighten connectors and terminals to comply with tightening torques specified in applicable codes.

D. Connect conduit, combiners, disconnects, and inverter as indicated on Drawings and comply with the manufacturer's installation instructions.

E. Open circuiting, or opaque covering shall be used to disable an array for installation or service.

Array shall be installed per NEC and all other local governing codes including local utility interconnection requirements.

F. Contractor shall design and submit array wiring scheme. Including but not limited to string sizing, combiner sizing, all associated wire sizes, and inverter tie in. Operating Voltages shall fall within operating parameters of inverter and be properly sized to account for performance variation in temperatures.

G. Strings shall have an open circuit voltage of as close to 600V as determined in NEC 690.7 at

STC, and a Short Circuit current of no more than the module rating ADC at STC as determined in NEC 690.8, strings shall be sized to operate within inverter operating voltage.

H. All cables including the module lead cables shall be contained in a wireway or conduit, and properly supported.

I. Modules shall run parallel to each other and be installed at right angles from the edge of structure. All wireway and conduit shall be routed the same.

J. Combiners shall be placed to minimize distance from string to combiner.

K. Voltage drop at any point on the DC side of the array shall be less than 1%.

3.02 MODELING OF ARRAY PERFORMANCE:

A. Provide a PV Syst model detailing expected kWh output.

1. Contractor shall provide Four page PV stys 8760 report with solar array performance.

2. Array shall be modeled accurately for placement and sizing.

3. Module and inverter proposed shall be modeled for actual performance. All other losses shall be modeled as follows:

DC Side (as input to PVSyst)

1. Module mismatch = 1.0% - 2.0%

2. Wiring losses = 1.0% - 2.0%

3. Reflective losses = bo parameter = 0.05 (PVSyst default value)

4. Series diode losses = as applicable

5. Soiling losses = 3.0% (if rainy or washed at least once year) -

5.0% (if no washing)

6. Module quality = 1.0% - 2.0% (depending on rating tolerance, LID)

7. NOCT = 45˚C - 46˚C

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8. Temperature losses = use default module data

9. Module surface heat losses = k0 = 29.0 w/m2K; kv = 0 w/m2K/m/s;

or k0 = 25.0 w/m2K; kv = 1.2 w/m2K/m/s

(if weather data has good wind data)

10. Inverter losses = use PVSyst parameters for given inverter

AC Side (as percentage of total annual energy production)

1. Step-up Transformer = 0.75%

2. Wiring losses = 0.75%

3. Inverter container cooling = 0.1% (fans only) - 0.5% (air conditioning) of total annual energy production (if applicable)

4. Tracking (motors) = 0.4% - 0.5% (if applicable)

5. Tare losses = 0.05%

Note: If the lowest value in the range is used then provide justification.

3.03 GROUNDING:

A. Install an equipment grounding conductor for each framed module.

B. Equipment grounding conductor shall be installed at manufacturer required grounding point, and per recommendations.

C. Provide grounding conductors for structural racking system.

D. Install any disconnect in appropriate manner as to not incapacitate the GFI in the inverter.

3.04 IDENTIFICATION: PROVIDE PROPER IDENTIFICATION OF SYSTEM

COMPONENTS:

A. All junction boxes for strings shall indicate name of string, combiner, and building location, to which the modules are connected.

B. All junction boxes for modules shall indicate UL listing and cable size.

C. All Junction Boxes shall be labeled with the following words or equivalent:

THIS BOX CONTAINS LIVE PARTS WHICH CANNOT BE DEACTIVATED

D. All Test points shall be clearly labeled with their expected readings given.

E. Modules shall have UL and IEC listings indicated on affixed labels, along with short circuit current, open circuit voltage, and STC and NOTC rated watts.

F. All Disconnects shall be labeled with string or equipment it isolates.

G. Combiners and Disconnects shall be labeled with the following words or equivalent:

WARNING

ELECTRIC SHOCK HAZARD

DO NOT TOUCH TERMINALS.

TERMINALS ON BOTH THE LINE AND LOAD SIDE

MAY BE ENERGIZED IN THE OPEN POSITION

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3.05 FACTORY TESTING:

A. Modules shall be rated and tested to STC.

B. Quality tests on glass impact/shatter quality.

C. Test all panels for shorts and earth faults.

D. Environmental Testing: Damp heat, humidity freeze, thermal cycling, light soak, and hot spot.

E. Endurance Electrical: Wet and Dry Hi Pot; reverse current, current leakage, cable pull.

3.06 FIELD QUALITY CONTROL:

A. Start-Up Testing:

1. Check all equipment and grounding to assure continuity of connection. Notify Engineer of excessive resistance.

2. Find and remove all ground faults. Provide one year of ground fault repair service.

3. Upon completion of installation, demonstrate capability and compliance of system with requirements. Where possible, correct malfunctioning units at site, then retest to demonstrate compliance; otherwise remove and replace with new units and proceed with retesting. Initial testing and retesting to be at no cost to owner.

3.07 COMMISSIONING:

A. System shall be tested and commissioned in the normal manner in accordance with NEC and industry standards.

B. A minimum irradiation level of 600 W/m2 shall be used to ensure accurate extrapolation to

STC.

C. Test that must be performed:

1. Electrical performance test on PV array.

2. Test on inverter efficiency and power quality.

3. Long term output monitoring.

D. Contracting Representative must be present for the following tests:

1. Synchronization with the grid at first start up.

2. Safety interlocks.

3. Warning Labels Check.

E. Manufacture shall have a representative present at start-up of array for duration of 2 days.

(1 for installation verification and 1 for possible troubleshooting.)

3.08 AGREEMENT TO MAINTAIN:

A. Prior to time of final acceptance, manufacturer shall agree to replace a facility module/component within 1 week of notification throughout duration of warranty. Penalty shall be equal to cost of array performance lost and replacement costs of defective part plus labor.

END OF SECTION 481413