Atch_01_Specifications_Rev_1_0001.pdf

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DISTRIBUTION TRANSFORMERS

SECTION 26 12 19 - DISTRIBUTION TRANSFORMERS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Distribution pad-mounted transformers.

1.2 QUALITY ASSURANCE

A. Referenced Standards:

1. American National Standards Institute (ANSI).

2. FM Global (FM).

3. Institute of Electronic and Electronics Engineers, Inc. (IEEE):

a. 386, Standard for Separable Insulated Connector Systems for Power Distribution Systems Rated 2.5 kV through 35 kV.

b. C57.12.00, Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers.

c. C57.12.28, Standard for Pad-Mounted Equipment - Enclosure Integrity.

d. C57.12.29, Standard for Pad-Mounted Equipment - Enclosure Integrity for Coastal

Environments.

e. C57.12.34, Standard Requirements for Pad-Mounted, Compartmental-Type, Self-

Cooled, Three-Phase Distribution Transformers (2500 kVa and Smaller) - High- Voltage: 34 500 GrdY/19 920 Volts and Below; Low-Voltage: 480 Volts and Below.

f. C57.12.70, Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers.

g. C57.12.80, Standard Terminology for Power and Distribution Transformers.

h. C57.12.90, Standard Test Code for Liquid-Immersed Distribution, Power, and

Regulating Transformers.

i. C62.11, Standard for Metal-Oxide Surge Arresters for Alternating Current Power

Circuits (>1 kV).

4. National Electrical Manufacturers Association (NEMA).

a. TP 1, Guide for Determining Energy Efficiency for Distribution Transformers.

5. National Fire Protection Association (NFPA):

a. 70, National Electrical Code (NEC).

6. Underwriters Laboratories, Inc. (UL).

1.3 SUBMITTALS

A. Shop Drawings:

1. Product technical data:

a. Provide submittal data for all products including subcomponents specified in PART 2 of this Specification Section.

2. Fabrication and/or layout Drawings.

a. Outline Drawing including dimensions, weight and identification of all components and features.

b. Nameplate Drawing.

3. Certifications:

a. Letter stating compliance with current Department of Energy efficiency requirements.

4. Test reports:

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B. Contract Closeout Information:

1. Operation and Maintenance Data:

a. Content of Operation and Maintenance Manual:

1) Instruction and maintenance manual.

2) Product technical data provided in the submittal.

3) Outline drawing updated for as-built conditions.

4) Nameplate Drawing updated for as-built conditions.

5) Actual impedance data.

6) Factory test report.

7) Acceptance testing report.

C. Informational Submittals:

1. Factory test report.

1.4 DELIVERY, STORAGE, AND HANDLING

A. Protect nameplates on electrical equipment to prevent defacing.

B. All equipment shall be delivered to Yosemite National Park, 5083 Foresta Road, El Portal, CA, 95318.

1. Deliveries are accepted Monday through Friday from 0730 to 1400 (closed federal holidays).

The Contractor must provide 48-hours advance notice of delivery to ensure personnel are available and on-site.

2. The Contractor is responsible for off-loading all equipment on-site at the location stated above.

3. Travel restrictions exist on Route 140, from Mariposa to El Portal, California. All vehicles are restricted to 45-feet total length on Route 140 into the Park, see Caltrans website at http://www.dot.ca.gov. Please verify current road conditions prior to hauling. These delays and restrictions must be considered part of the existing conditions within the Park and will not be cause for any additional compensation as a result of travel restrictions or related work.

1.5 TERMS OF PAYMENT

A. The submittal of a 40% payment request upon approval of shop drawings and technical submittals is allowable.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:

1. Maddox.

2. Cooper Power Systems by Eaton

3. Square D by Schneider Electric.

4. WEG.

5. ABB.

6. Or approved equal.

2.2 THREE-PHASE TRANSFORMER

A. General:

1. Transformer to be designed and constructed in accordance with:

a. IEEE C57.12.00, IEEE C57.12.28, C57.12.29 IEEE C57.12.34, IEEE C57.12.70, IEEE C57.12.80.

b. FM Global approved.

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B. Ratings and Configurations:

1. Type: Outdoor, pad-mounted, liquid-immersed, self-cooled, compartmental type.

2. Operation and application: Step-down operation.

3. Configuration:

a. Dead-front, radial-feed primary

4. Voltage and kVA Ratings:

a. Primary Voltage: 12kV, Three phase, 60Hz

b. Secondary Voltage: 208/120V, Three phase, 60Hz.

c. 500kVA

5. Number of phases: Three.

6. Frequency: 60 Hz.

7. Polarity: ANSI standard.

8. Percent impedance: ANSI standard.

9. Basic impulse level (BIL):

a. Primary: 95 kV.

b. Secondary: 30kV.

10. Temperature rise: 65 degrees C.

11. Efficiency: Meet all current Department of Energy rules.

12. Connections:

a. Delta primary, Y-grounded on secondary.

b. Primary: 200 ampere bushing wells and insert for loadbreak elbows.

c. Secondary (208/120V):

1) Less than 750 kVA: Six-hole, tin-plated, spade-type minimum or as required.

2) Removable ground strap on neutral terminal.

3) Provide internal loadbreak switches. Internal loadbreak switches to be supplied with the transformer by the manufacturer. These switches are designed to interrupt rated current only and they are not designed to interrupt fault currents. Provide labels on the transformer front plate near the switch for instructions on operating the switch.

13. Tap-changer: De-energized type on H-winding, five total with:

a. Two 2.5% above and two 2.5% below nominal tap.

b. NEMA taps (14,400V, 13,800V, 13,200V, 12,470V, 12,540V).

C. Components:

1. Core and Coil:

a. Coil material: Aluminum or copper.

b. Windings designed to reduce losses.

c. Insulating materials rated for 120 degrees C class.

d. Core material: High-grade, grain-oriented, non-aging silicon core steel with high magnetic permeability, low hysteresis and eddy current losses.

1) Magnetic flux densities are to be kept well below saturation to allow for a minimum 10% overvoltage excitation.

2) Properly annealed to reduce stresses induced during the manufacturing processes and reduce core losses.

e. Core frame:

1) Designed to provide maximum support for the core and coil assembly.

2) Welded or bolted to ensure maximum short-circuit strength.

f. Designed and manufactured to meet the short circuit requirements of ANSI C57.12.90.

g. Vacuum processed and energized or baked in an oven prior to tanking to set the epoxy coating on the insulating paper and remove moisture from the insulation prior to vacuum filing.

2. Tank and Terminal Cabinet Enclosure:

a. Carbon steel reinforced with external, internal or sidewall braces, with all seams and joints continuously welded.

b. Design the tank and attached components to withstand pressures greater than the required operating design value without permanent deformation.

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c. Sealed-tank construction:

1) 500kVA and below: Bolted main tank cover.

d. Lifting lugs welded to tank.

e. Steel divider between high-voltage (right side) and low-voltage (left side) compartments.

f. No exposed screws, bolts, or other fastening devices that are externally removable.

g. Tamper resistant per IEEE C57.12.28.

h. Cabinet depth: IEEE standard or 20 inches minimum.

i. 1 inches upper fill plug.

j. 1 inches drain valve with sampling device mounted in an enclosure outside of the main terminal cabinet.

k. Automatic pressure relief device.

l. Ground pad(s):

1) 500kVA and below: Two steel pads with one hole.

m. Door:

1) Each compartment will have removable, three-point latching hinged doors equipped for latching in the open position.

2) The high-voltage compartment door will have a fastening device that is accessible only through the low-voltage compartment.

3) The hinge assemblies made of corrosion-resistant material.

a) Provide stainless-steel hinge pins of 3/8 inches minimum diameter.

4) Both compartment doors capable of securing with a single padlock having a maximum 1/2 inches diameter shackle.

5) Door secured with a hex-head bolt.

3. Overcurrent protection:

a. Internal partial-range current limiting backup fuse.

b. Provide full range protection two fuse system.

c. Partial-range current limiting backup fuse.

1) Interrupting rating: 50,000A.

2) Under oil, non-field replaceable.

d. Current sensing, expulsion-type, bay-O-Net fuse.

4. Finish:

a. Manufacturer's standard corrosion protection system in accordance with IEEE C57.12.28.

b. Contractor shall paint each enclosure “Wosky Brown” to match NPS standards.

5. Dielectric Fluid:

a. Tested for compatibility with the transformer.

b. Less-flammable, natural or synthetic ester, biodegradable per US EPA OPPTS

835.3100 and certified to comply with US EPA Environmental Technology Verification requirements.

1) Envirotemp FR3 or approved equal.

c. Permanently affix nameplate stamped "Non PCB".

6. Accessories:

a. Liquid level gage Stainless steel or laser-scribed anodized aluminum nameplate, with date of manufacturer and mounted on exterior of transformer.

b. Cable parking stands, one per bushing.

2.3 SURGE ARRESTORS

A. Standards: IEEE 386 and IEEE C62.11.

B. MOV gapless elbow type.

C. Elbow Connector:

1. One-piece design, comprised of an insulation layer and outer shield constructed of EPDM rubber.

2. 200A, dead front, load break type with hot stick pulling eye and grounding tab.

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D. Voltage Class: As indicated on the Drawings.

E. Arrestor MCOV Rating: Per manufacturers recommendations.

2.4 SOURCE QUALITY CONTROL

A. Factory Tests: At a minimum, provide all routine tests as specified in IEEE C57.12.00 inches accordance with IEEE C57.12.90.

2.5 MAINTENANCE MATERIALS

A. Touch-up paint, two separate one quart containers.

END OF SECTION

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August 2024 SWITCHBOARDS 10400583

SECTION 26 24 13 - SWITCHBOARDS

1.1 SUMMARY

A. Section Includes:

1. Low voltage switchboards.

2. One-line Diagram, Appendix A.

B. Related Specification Sections include but are not necessarily limited to:

1. Section 26 28 00 - Overcurrent and Short Circuit Protective Devices, Appendix B:

a. Section 26 05 00 - Electrical - Basic Requirements does not apply.

b. Section 26 08 13 - Acceptance Testing, does not apply.

c. Section 26 05 00 does not apply.

2. Section 26 43 13 - Surge Protection Devices for Low-Voltage Electrical Power Circuits, Appendix C:

a. 1.4B, Operations and Maintenance, revise to: Content of Operation and Maintenance

Manual:

1) Instruction and maintenance manual.

2) Product technical data provided in the submittal.

3) Outline drawing updated for as-built conditions.

4) Nameplate Drawing updated for as-built conditions.

5) Actual impedance data.

6) Factory test report.

7) Acceptance testing report.

1.2 QUALITY ASSURANCE

A. Referenced Standards:

1. National Electrical Manufacturers Association (NEMA):

a. 250, Enclosures for Electrical Equipment (1000 Volts Maximum).

b. PB 2, Deadfront Distribution Switchboards.

2. Underwriters Laboratories, Inc. (UL):

a. 891, Switchboards.

B. Verify the space required for the switchboard is equal to or less than the space allocated.

1.3 SUBMITTALS

A. Shop Drawings:

1. Product technical data.

a. Provide submittal data for all products specified in PART 2 of this Specification Section.

2. Fabrication and/or layout drawings:

a. Switchboard layout with alphanumeric designation, protective devices size and type, as indicated in the one-line diagram or switchboard schedule.

b. Front elevation and plan drawing of the assembly.

c. Three-line or single line and schematic diagrams.

d. Conduit space locations within the assembly.

B. Contract Closeout Information:

1. Operation and Maintenance Data:

a. Content of Operation and Maintenance Manual:

1) Instruction and maintenance manual.

2) Product technical data provided in the submittal.

3) Outline drawing updated for as-built conditions.

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4) Nameplate Drawing updated for as-built conditions.

5) Actual impedance data.

6) Factory test report.

7) Acceptance testing report.

b. Fabrication and/or layout drawings updated with as-build conditions.

C. Informational Submittals:

1. Equipment marking and documentation.

2. Factory test report.

D. Meter Main Panels:

1. Provide Electric Service Equipment Requirements Committee data.

2. NPS approval

1.4 DELIVERY, STORAGE, AND HANDLING

A. All equipment shall be delivered to Yosemite National Park, 5083 Foresta Road, El Portal, CA, 95318.

1. Deliveries are accepted Monday through Friday from 0730 to 1400 (closed federal holidays). The Contractor must provide 48-hours advance notice of delivery to ensure personnel are available and on-site.

2. The Contractor is responsible for off-loading all equipment on-site at the location stated above.

3. Travel restrictions exist on Route 140, from Mariposa to El Portal, California. All vehicles are restricted to 45-feet total length on Route 140 into the Park, see Caltrans website at http://www.dot.ca.gov. Please verify current road conditions prior to hauling. These delays and restrictions must be considered part of the existing conditions within the Park and will not be cause for any additional compensation as a result of travel restrictions or related work.

1.5 TERMS OF PAYMENT

A. The submittal of a 40% payment request upon approval of shop drawings and technical submittals is allowable.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:

1. Eaton.

2. GE by ABB.

3. Square D by Schneider Electric.

4. Siemens Corporation.

5. Or approved equal.

2.2 SWITCHBOARDS

A. Ratings:

1. Voltage, number of phases, number of wires, and main bus current rating as indicated on the

Drawings.

2. Assembly short circuit current and interrupting device rating as indicated on the Drawings.

3. When low voltage power circuit breakers are utilized, the switchboard shall have a 30 cycle withstand rating corresponding to the breaker rating.

4. Service Entrance Equipment rated.

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B. Construction:

1. Standards: NEMA 3R, UL 891, nonwalk-in.

2. Completely enclosed, dead-front, self-supporting metal structure.

3. Vertical panel sections bolted together.

4. Frames bolted together to support and house bus, cables and other equipment.

5. Frames and insulating blocks to support and brace main buses for short circuit stresses up to ratings indicated on the Drawings.

6. All sections front and rear aligned.

7. Devices front removable and load connections front and rear accessible.

8. NEMA 3R rated weatherproof enclosure:

a. Nonwalk-in type with sloping roof downward toward rear.

b. Thermostatically controlled space heaters to minimize internal condensation.

c. Power for heater derived internal to the switchboard.

9. Interior and exterior steel surfaces cleaned and painted with rust inhibiting primer and manufacturer's standard paint.

C. Buses:

1. Material: Silver-plated copper.

2. Main horizontal bus:

a. Fully rated and continuous over length of switchboard with all three phases arranged in the same vertical plane.

b. Sufficient size to limit temperature rise to 65 DEGC over average air temperature outside the enclosure of 40 DEGC.

3. Neutral bus: Fully rated and continuous over length of switchboard.

4. Ground bus: 1/4 x 2 IN copper, continuous over length of switchboard and solidly grounded to each vertical section structure.

5. Bus joints connected using through bolts and conical spring-type washers for maximum conductivity.

D. Overcurrent and Short Circuit Protective Devices:

1. Main overcurrent protective device:

a. Individually mounted molded case circuit breaker.

2. Feeder overcurrent protective devices:

a. Group mounted molded case circuit breaker.

3. See Appendix B, Specification Section 26 28 00 for overcurrent and short circuit protective device requirements.

4. Factory installed.

5. Means to padlock all main and feeder devices in the open position.

6. Meets PG&E and/or NPS requirements.

E. Surge Protective Device: Integrally mounted, see Appendix C, Specification Section 26 43 13.

F. Metering:

1. Digital demand meters or power quality meters shall be owned by NPS and be in compliance with 2005 EPACT.

2. Install in section of switchboard section at + 60” above finished grade.

3. Provide Shark 200 or equal. Provide at minimum voltage, amperage, hz, power in kw, kwh, kvars, kVA, PF and THD.

4. Provide with CTs where required.

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PART 3 - EXECUTION

3.1 Refer to Execution Requirements in the following Appendices:

A. APPENDIX B - SECTION 26 43 13 – SURGE PROTECTION DEVICES FOR LOW-

VOLTAGE ELECTRICAL POWER CIRCUITS, PART 3.

B. APPENDIX C - SECTION 26 28 00 – OVERCURRENT AND SHORT CIRCUIT

PROTECTIVE DEVICES, PART 3.

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Appendix A: One Line Diagram.

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SURGE PROTECTION DEVICES FOR LOW-VOLTAGE ELECTRICAL POWER CIRCUITS

APPENDIX B

SECTION 26 43 13 – SURGE PROTECTION DEVICES FOR LOW-VOLTAGE

ELECTRICAL POWER CIRCUITS

A. Section Includes:

1. Type PC3 SPD - Medium exposure locations (switchboard, panelboard and motor control center), integrally mounted.

1.2 QUALITY ASSURANCE

A. Referenced Standards:

1. Institute of Electrical and Electronics Engineers, Inc. (IEEE):

a. C62.41, Recommended Practice for Surge Voltages in Low-Voltage AC Power Circuits.

b. C62.41.1, Guide on the Surge Environment in Low-Voltage (1000V and Less) AC Power Circuits.

c. C62.41.2, Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power Circuits.

d. C62.45, Recommended Practice on Surge Testing For Equipment Connected to Low- Voltage (1000V and Less) AC Power Circuits.

2. National Electrical Manufacturers Association (NEMA):

a. 250, Enclosures for Electrical Equipment (1000 Volts Maximum).

3. National Fire Protection Association (NFPA):

a. 70, National Electrical Code (NEC).

4. Underwriters Laboratories, Inc. (UL):

a. 1283, Standard for Electromagnetic Interference Filters.

b. 1449, Standard for Surge Protective Devices.

B. Qualifications:

1. Provide devices from a manufacturer who has been regularly engaged in the development, design, testing, listing and manufacturing of SPDs of the types and ratings required for a period of 10 years or more and whose products have been in satisfactory use in similar service.

a. Upon request, suppliers or manufacturers shall provide a list of not less than three customer references showing satisfactory operation.

1.3 DEFINITIONS

A. Clamping Voltage:

1. The applied surge shall be induced at the 90 DEG phase angle of the applied system frequency voltage.

2. The voltage measured at the end of the 6 IN output leads of the SPD and from the zero voltage reference to the peak of the surge.

B. Let-Through Voltage:

1. The applied surge shall be induced at the 90 DEG phase angle of the applied system frequency voltage.

2. The voltage measured at the end of the 6 IN output leads of the SPD and from the system peak voltage to the peak of the surge.

C. Maximum Continuous Operating Voltage (MCOV): The maximum steady state voltage at which the SPD device can operate and meet its specification within its rated temperature.

D. Maximum Surge Current:

EL PORTAL ADMIN CAMP,

PMIS #196416

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1. The maximum 8 x 20 microsecond surge current pulse the SPD device is capable of surviving on a single-impulse basis without suffering either performance degradation or more than 10% deviation of clamping voltage at a specified surge current.

2. Listed by mode, since number and type of components in any SPD may very by mode.

E. Protection Modes: This parameter identifies the modes for which the SPD has directly connected protection elements, i.e., line-to-neutral (L-N), line-to-line (L-L), line-to-ground (L- G), neutral-to-ground (N-G).

F. Surge Current per Phase:

1. The per phase rating is the total surge current capacity connected to a given phase conductor.

a. For example, a wye system surge current per phase would equal L-N plus L-G; a delta system surge current per phase would equal L-L plus L-G.

b. The N-G mode is not included in the per phase calculation.

G. System Peak Voltage: The electrical equipment supply voltage sine wave peak (i.e., for a 480/277 V system the L-L peak voltage is 679V and the L-N peak voltage is 392 V).

1.4 SUBMITTALS

A. Shop Drawings:

1. Product technical data including:

a. Manufacturer's qualifications.

b. Standard catalog cut sheet.

c. Electrical and mechanical drawing showing unit dimensions, weights, mounting provisions, connection details and layout diagram of the unit.

d. Testing procedures and testing equipment data.

e. Create a Product Data Sheet for each different model number of SPD provided (i.e., Model XYZ with disconnect and Model XYZ without disconnect, each require a Product Data Sheet).

1) Data in the Product Data Sheet heading:

a) SPD Type Number per PART 2 of the Specification.

b) Manufacturer’s Name.

c) Product model number.

2) Data in the Product Data Sheet body:

a) Column one: Specified value/feature of every paragraph of PART 2 of the

Specification.

b) Column two: Manufacturer’s certified value confirming the product meets the specified value/feature.

c) Name of the nationally recognized testing laboratory that preformed the tests.

d) Warranty information.

3) Data in the Product Data Sheet closing:

a) Signature of the manufacturer’s official (printed and signed).

b) Title of the official.

4) Date of signature.

B. Operation and Maintenance Manuals:

1. Content of Operation and Maintenance Manual:

a. Instruction and maintenance manual.

b. Product technical data provided in the submittal.

2. Warranty.

1.5 WARRANTY

A. Minimum of a five year Warranty from date of shipment against failure when installed in compliance with applicable national/local electrical codes and the manufacturer's installation, operation and maintenance instructions.

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2.1 GENERAL

A. Standards: IEEE C62.41.1, IEEE C62.41.2, IEEE C62.45, MIL-STD 220B, UL 1283, UL 1449.

2.2 TYPE PC3 SPD

A. Product:

1. SPD tag number or electrical equipment tag number SPD is connected to SPD-3.

2. Integrally mounted in a switchboard, panelboards or motor control centers.

3. Hybrid solid state high performance suppression system.

a. Do not use gas tubes, spark gaps or other components in suppression system which might short or crowbar the line resulting in interruption of normal power flow to connected loads.

4. Do not connect multiple SPD modules in series to achieve the specified performance.

5. Designed for parallel connection.

6. Field connection: Use mechanical or compression lugs for each phase, neutral and ground that will accept bus bar or #10 through #1/0 conductors.

7. Device monitor:

a. Long-life, solid state, externally visible indicators and Form C contact(s) that monitor the on-line status of each mode of the units suppression filter system or power loss in any of the phases.

b. A fuse status only monitor system is not acceptable.

B. Operating Voltage: The nominal unit operating voltage and configuration as indicated on the Drawings.

C. Modes of Protection: All modes.

1. Three phase (delta): L-L, L-G.

2. Three phase (wye): L-N, L-L, L-G and N-G.

3. Single phase (2 pole): L-L, L-N, L-G and N-G.

4. Single phase: L-N, L-G and N-G.

D. Maximum Continuous Operating Voltage: Less than 130% of system peak voltage.

E. Operating Frequency: 45 to 65 Hz.

F. Short Circuit Rating: Equal to or greater than rating of equipment SPD is connected to.

G. Maximum Surge Current: 160,000 A per phase, 80,000 A per mode minimum.

H. Minimum Repetitive Surge Current Capacity: 4000 IEEE C High or B combination waveform impulses with no degradation of more than 10% deviation of the clamping voltage.

I. SPD Protection:

1. Integral unit level and/or component level overcurrent fuses and sustained overvoltage thermal cutout device.

2. An IEEE B combination wave shall not cause the fuse to open and render the SPD inoperable.

J. Maximum Clamping Voltages: Dynamic test at the 90 DEG phase angle including 6 IN lead length and measured from the zero voltage reference:

System Voltage

Test Mode

IEEE C62.41

UL 1449 B Comb. Wave B3 Ring Wave

L-L < 250 V

L-N < 150 V

L-L 1000 V 700 V 800 V

L-N 600 V 400 V 500 V

L-G 800 V 550 V 600 V

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N-G 800 V 550 V 600 V

L-L > 250 V

L-N > 150 V

L-L 2000 V 1400 V 1800 V

L-N 1150 V 800 V 1000 V

L-G 1550 V 1000 V 1200 V

N-G 1550 V 1000 V 1200 V

K. EMI-RFI Noise Rejection: Attenuation greater than 30 dB for frequencies between 100 kHz and

100 MHz.

2.3 SOURCE QUALITY CONTROL

A. SPD approvals and ratings shall be obtained by manufacturers from nationally recognized testing laboratories.

B. The SPD are to be tested as a complete SPD system including:

1. Integral unit level and/or component level fusing.

2. Neutral and ground shall not be bonded during testing.

3. 6 IN lead lengths.

4. Integral disconnect switch when provided.

C. The “as installed” SPD system including the manufacturers recommended circuit breaker, the SPD is connected to, will not open when tested with a IEEE C3 combination waveform.

D. Tests to be performed in accordance with IEEE C62.45:

1. Clamping voltage performance testing using IEEE C62.41 Category waveforms.

2. Single pulse surge current capacity test.

3. Repetitive surge current capacity testing.

4. Spectrum analysis for EMI-RFI noise rejection.

3.1 FACTORY INSTALLED INSTALLATION

A. Install products in accordance with manufacturer's instructions.

B. Type PC3 SPD:

1. Connected in parallel to the equipment.

2. Install in dedicated electrical equipment compartment, bucket or panelboard box at the factory before shipment.

3. Provide leads that are as short and straight as possible.

4. Maximum lead length: 12 IN.

5. Minimum lead size: #2 stranded AWG or bus bar.

6. Connect leads to the equipment to be protected by one of the following means:

a. Through a circuit breaker or molded case switch mounted in the equipment.

b. Use manufacturer recommended circuit breaker size.

c. Circuit breaker or switch to be operable from the equipment exterior or from behind a hinged door.

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OVERCURRENT AND SHORT CIRCUIT PROTECTIVE DEVICES

APPENDIX C

SECTION 26 28 00 – OVERCURRENT AND SHORT CIRCUIT PROTECTIVE DEVICES

A. Section Includes:

1. Low voltage circuit breakers.

1.2 QUALITY ASSURANCE

A. Referenced Standards:

1. Institute of Electrical and Electronics Engineers, Inc. (IEEE):

a. C37.13, Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures.

b. C37.16, Low-Voltage Power Circuit Breakers and AC Power Circuit Protectors -

Preferred Ratings, Related Requirements, and Application Recommendations.

c. C37.17, Trip Devices for AC and General Purpose DC Low Voltage Power Circuit

Breakers.

2. National Fire Protection Association (NFPA):

a. 70, National Electrical Code (NEC).

3. Underwriters Laboratories, Inc. (UL):

a. 489, Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures.

b. 943, Standard for Safety for Ground-Fault Circuit-Interrupters.

c. 1066, Standard for Low-Voltage AC and DC Power Circuit Breakers Used in

Enclosures.

1.3 SUBMITTALS

A. Shop Drawings:

1. Product technical data including:

a. Provide submittal data for all products specified in PART 2 of this Specification Section.

B. Contract Closeout Information:

1. Operation and Maintenance Data:

a. Instruction and maintenance manual.

b. Product technical data provided in the submittal.

C. Informational Submittals:

1. Reports:

a. As-left condition of all circuit breakers that have adjustable settings.

2.1 MANUFACTURERS

A. Subject to compliance with the Contract Documents, the following manufacturers are acceptable:

1. Circuit breakers:

a. Eaton.

b. Or approved equal.

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OVERCURRENT AND SHORT CIRCUIT PROTECTIVE DEVICES

2.2 CIRCUIT BREAKERS

A. Molded Case Type:

1. General:

a. Standards: UL 489.

b. Unit construction.

c. Over-center, toggle handle operated.

d. Quick-make, quick-break, independent of toggle handle operation.

e. Manual and automatic operation.

f. All poles open and close simultaneously.

g. Three position handle: On, off and tripped.

h. Molded-in ON and OFF markings on breaker cover.

i. One-, two- or three-pole as indicated on the Drawings.

j. Current and interrupting ratings as indicated on the Drawings.

2. Thermal magnetic type:

a. Inverse time overload and instantaneous short circuit protection by means of a thermal magnetic element.

b. Frame size 150 amp and below:

1) Non-interchangeable, non-adjustable thermal magnetic trip units.

c. Frame sizes 225 to 400 amp (trip settings less than 400A):

1) Interchangeable and adjustable instantaneous thermal magnetic trip units.

3. Current and interrupting ratings as indicated on the Drawings and a 30-cycle short-time withstand ratings equal to their symmetrical interrupting ratings, regardless of whether equipped with instantaneous trip protection or not.

B. Provide LSI-A trip ratings per contract drawings. Provide arc flash maintenance bypass switch and provide blue light showing switch in arc flash bypass mode or equivalent alarm to notify operator if breaker left in the ARMS mode. Coordinate with manufacturer for standard installation of the Arms feature with the blue light to warn operators that the breaker was left in the Arms mode.

3.1 FACTORY INSTALLED INSTALLATION

A. Current and interrupting ratings as indicated on the Drawings.

B. Series rated systems not acceptable.

C. Devices shall be ambient temperature compensated.

D. Circuit Breakers:

1. Molded case circuit breakers shall incorporate the following, unless indicated otherwise on the Drawings:

a. Frame sizes 400 amp and less with trip setting less than 400A shall be thermal magnetic type.

3.2 FACTORY INSTALLED QUALITY CONTROL

A. Adjustable Circuit Breakers:

1. Set all circuit breaker adjustable taps as defined on the Drawings, except adjust motor circuit protectors per the motor nameplate and NFPA 70 requirements.