36C24718R0120-00002002.pdf

Addendum Information

ELECTRICAL SPECIFICATIONS

Specification Section 26 05 13

Add new section 26 05 13 – Medium Voltage Cables

Specification Section 26 12 19

Add new section 26 12 19 – Pad Mounted, Liquid Filled, Medium Voltage Transformers

Specification Section 26 32 13

Delete paragraph 2.5. Replace with new paragraph 2.5 attached.

ELECTRICAL DRAWINGS

Drawing ES101

Delete Drawing ES101 – Electrical Site Plan – Dated: May 20. 2016.

Replace with new Drawing ES101 – Electrical Site Plan, Electrical Legend, Abbreviations, and Work Keynotes –

Dated: May 20, 2016, - Revised: Mar. 16, 2018.

Drawing ES102

Delete Drawing ES102 – Electrical Site Plan – Dated: May 20, 2016.

Replace with new Drawing ES1021 – Partial Electrical Site Plan, Pump Enclosure Plans, Notes, Electrical

Schedules, and One Line Diagram – Dated: May 20. 2016, - Revised: Mar. 16, 2018.

Drawing ES103

Delete Drawing ES103 – Electrical Site Plan – Dated: May 20, 2016.

Replace with new Drawing ES103 – Partial Electrical Site Plans and Camera Riser, - Dated: May 20, 2016, -

Revised: Mar. 16, 2018.

Drawing ES501

Delete Drawing ES501 –Details - Dated May 20. 2016.

Replace with new Drawing ES1021 –Electrical Details - Dated May 20. 2016, - Revised: Mar. 16. 2018.

Amendment #00002

Attachment #2 - 1 of 30

CARL VINSON MEDICAL CENTER REPLACE WATER TOWER

Construction Documents March 2018

REVISED

TABLE OF CONTENTS 00 01 10-1

DEPARTMENT OF VETERANS AFFAIRS

VHA MASTER SPECIFICATIONS

TABLE OF CONTENTS

Section 00 01 10

DIVISION 00 - SPECIAL SECTIONS (NOT USED) DATE

DIVISION 01 - GENERAL REQUIREMENTS

01 00 00 General Requirements 11-15 01 32 16.15 Project Schedules (Small Projects – Design/Bid/Build 04-13 01 33 23 Shop Drawings, Product Data, and Samples 07-15 01 35 26 Safety Requirements 10-14 01 42 19 Reference Standards 07-15 01 45 29 Testing Laboratory Services 06-15 01 57 19 Temporary Environmental Controls 01-11 01 74 19 Construction Waste Management 09-13

DIVISION 02 – EXISTING CONDITIONS (NOT USED)

02 21 00 Site Surveys 05-13 02 41 00 Demolition 02-15 02 83 33.13 Lead-Based Paint Removal and Disposal

DIVISION 03 – CONCRETE (NOT USED)

03 30 53 (Short-Form) Cast-in-Place Concrete 02-16

DIVISION 04 – MASONRY (NOT USED)

DIVISION 05 – METALS (NOT USED)

DIVISION 06 – WOOD,PLASTICS AND COMPOSITES (NOT USED)

DIVISION 07 - THERMAL AND MOISTURE PROTECTION(NOT USED)

DIVISION 08 – OPENINGS (NOT USED)

DIVISION 09 – FINISHES (NOT USED)

DIVISION 10 – SPECIALTIES (NOT USED)

DIVISION 11 – EQUIPMENT (NOT USED)

DIVISION 12 – FURNISHINGS (NOT USED)

DIVISION 13 - SPECIAL CONSTRUCTION (NOT USED)

Attachment #2 - 2 of 30

TABLE OF CONTENTS 00 01 10-2

DIVISION 14– CONVEYING EQUIPEMENT (NOT USED)

DIVISION 21- FIRE SUPPRESSION (NOT USED)

DIVISION 22 – PLUMBING (NOT USED)

22 05 19 Meters and Gages for Plumbing Piping 09-15 22 11 20 Factory Prefabricated Pumping System 22 11 23 Domestic Water Pumps 09-15 22 12 16 Facility Elevated, Potable-Water Storage Tanks 09-15

DIVISION 23 – HEATING, VENTILATING, AND AIR

CONDITIONING (HVAC) (NOT USED)

DIVISION 25 – INTEGRATED AUTOMATION (NOT USED)

DIVISION 26 – ELECTRICAL

26 05 11 Requirements for Electrical Installations 01-16 26 05 13 Medium-Voltage Cables 26 05 19 Low-Voltage Electrical Power Conductors and Cables 07-13 26 05 26 Grounding and Bonding for Electrical Systems 12-12 26 05 33 Raceway and Boxes for Electrical Systems 05-14 26 05 41 Underground Electrical Construction 26 12 19 Pad-Mounted, Liquid-Filled, Medium-Voltage Transformers 26 22 00 Low-Voltage Transformers 12-15 26 24 16 Panelboards 05-14 26 27 26 Wiring Devices 01-16 26 32 13 Engine Generator 26 36 23 Automatic Transfer Switches 26 41 00 Facility Lightning Protection 12-12 26 43 13 Surge Protective Devices 26 56 00 Exterior Lighting 05-14

DIVISION 27 – COMMUNICATIONS

27 05 11 Requirements for Communications Installations

DIVISION 28 – ELECTRONIC SAFETY AND SECURITY (NOT USED)

DIVISION 31 – EARTHWORK

31 20 11 Earthwork (Short Form) 10-12

DIVISION 32 – EXTERIOR IMPROVEMENTS

32 05 23 Cement and Concrete for Exterior Improvements 05-13 32 31 13 Chain Link Fences and Gates 05-13

DIVISION 33 – UTILITIES

33 10 00 Water Utilities 01-14

Attachment #2 - 3 of 30

TABLE OF CONTENTS 00 01 10-3

Attachment #2 - 4 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 1

SECTION 26 05 13

MEDIUM-VOLTAGE CABLES

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies the furnishing, installation, and connection of medium-voltage cables, indicated as cable or cables in this section, and medium-voltage cable splices and terminations.

1.2 RELATED WORK

A. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS:

Requirements that apply to all sections of Division 26.

B. Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS:

Requirements for personnel safety and to provide a low impedance path for possible ground fault currents.

C. Section 26 05 33, RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS: Conduits for medium-voltage cables.

D. Section 26 05 41, UNDERGROUND ELECTRICAL CONSTRUCTION: Manholes and ducts for medium-voltage cables.

E. Section 26 12 19, PAD-MOUNTED, LIQUID-FILLED, MEDIUM-VOLTAGE

TRANSFORMERS: Medium-voltage cable terminations for use in pad-mounted, liquid-filled, medium-voltage transformers.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with Paragraph, QUALIFICATIONS

(PRODUCTS AND SERVICES) in Section 26 05 11, REQUIREMENTS FOR

ELECTRICAL INSTALLATIONS.

1.4 FACTORY TESTS

A. Factory Tests shall be required.

B. Factory Tests shall be in accordance with Paragraph, MANUFACTURED

PRODUCTS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL

INSTALLATIONS, and the following requirement:

1. A representative sample of Medium-voltage cables from each lot shall be factory tested per NEMA WC 74 to ensure that there are no electrical defects in that specific lot of cable.

1.5 SUBMITTALS

A. Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements:

1. Shop Drawings:

Attachment #2 - 5 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 2

a. Submit sufficient information to demonstrate compliance with drawings and specifications.

b. Submit the following data for approval:

1) Complete electrical ratings.

2) Installation instructions.

2. Samples:

a. After approval of submittal and prior to installation, Contractor shall furnish sample in accordance with Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS.

3. Certifications:

a. Factory Test Reports: Submit certified factory production test reports for approval.

b. Field Test Reports: Submit field test reports for approval.

c. Compatibility: Submit a certificate from the cable manufacturer that the splices and terminations are approved for use with the cable.

d. Two weeks prior to final inspection, submit the following.

1) Certification by the manufacturer that the cables, splices, and terminations conform to the requirements of the drawings and specifications.

2) Certification by the Contractor that the cables, splices, and terminations have been properly installed and tested.

3) Certification by the Contractor that each splice and each termination were completely installed in a single continuous work period by a single qualified worker without any overnight interruption.

4. Qualified Worker Approval:

a. Qualified workers who install cables, splices, and terminations shall have a minimum of five years of experience splicing and terminating cables, including experience with the materials in the approved splices and terminations. Qualified workers who perform cable testing shall have a minimum of five year of experience performing electrical testing of medium-voltage cables, including the ability to understand, interpret test results and develop test report.

b. Furnish satisfactory proof of such experience for each qualified worker who splices or terminates the cables.

Attachment #2 - 6 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 3

1.6 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only.

B. American Society for Testing and Materials (ASTM):

B3-13...................Standard Specification for Soft or Annealed

Copper Wire

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

48-09...................Test Procedures and Requirements for

Alternating-Current Cable Terminations Used on

Shielded Cables Having Laminated Insulation

Rated 2.5 kV through 765 kV or Extruded

Insulation Rated 2.5 kV through 500 kV

386-06..................Separable Insulated Connector Systems for Power

Distribution Systems above 600 V

400-12..................Guide for Field Testing and Evaluation of the

Insulation of Shielded Power Cable Systems

400.2-13................Guide for Field Testing of Shielded Power Cable

Systems Using Very Low Frequency (VLF)

404-12..................Extruded and Laminated Dielectric Shielded

Cable Joints Rated 2500 V to 500,000 V

D. National Electrical Manufacturers Association (NEMA):

WC 71-14................Non-Shielded Cables Rated 2001-5000 Volts for

Use in the Distribution of Electric Energy

WC 74-12................5-46 KV Shielded Power Cable for Use in the

Transmission and Distribution of Electric

Energy

E. National Fire Protection Association (NFPA):

70-17...................National Electrical Code (NEC)

F. Underwriters Laboratories (UL):

1072-06 ................Medium-Voltage Power Cables

1.7 SHIPMENT AND STORAGE

A. Cable shall be shipped on reels such that it is protected against physical, mechanical and environmental damage. Each end of each length of cable shall be hermetically sealed with manufacturer’s end caps and securely attached to the reel.

Attachment #2 - 7 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 4

B. Cable stored and/or cut on site shall have the ends turned down, and sealed with cable manufacturer’s standard cable end seals, or field-installed heat-shrink cable end seals.

PART 2 - PRODUCTS

2.1 CABLE

A. Cable shall be in accordance with ASTM, IEEE, NEC, NEMA and UL, and as shown on the drawings.

B. Single conductor stranded copper conforming to ASTM B3.

C. Voltage Rating:

1. 15,000 V cable shall be used on all distribution systems with voltages ranging from 5,000 V to 15,000 V.

D. Insulation:

1. Insulation level shall be 133%.

2. Types of insulation:

a. Cable type abbreviation, EPR: Ethylene propylene rubber insulation shall be thermosetting, light and heat stabilized.

b. Cable type abbreviation, XLP, XLPE, or TR-XLPE: cross-linked polyethylene insulation shall be thermosetting, light and heat stabilized, and chemically cross-linked.

E. Insulation shield shall be semi-conducting. Conductor shield shall be semi-conducting.

F. Insulation shall be wrapped with copper shielding tape, helically-applied over semi-conducting insulation shield.

G. Heavy duty, overall protective polyvinyl chloride jacket shall enclose every cable. The manufacturer's name, cable type and size, and other pertinent information shall be marked or molded clearly on the overall protective jacket.

H. Cable temperature ratings for continuous operation, emergency overload operation, and short circuit operation shall be not less than the NEC, NEMA WC 71, or NEMA WC 74 standard for the respective cable.

2.2 SPLICES AND TERMINATIONS

A. Materials shall be compatible with the cables being spliced and terminated, and shall be suitable for the prevailing environmental conditions.

Attachment #2 - 8 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 5

B. In locations where moisture might be present, the splices shall be watertight. In manholes and pullboxes, the splices shall be submersible.

C. Splices:

1. Shall comply with IEEE 404. Include all components required for complete splice, with detailed instructions.

D. Terminations:

1. Shall comply with IEEE 48. Include shield ground strap for shielded cable terminations.

2. Load-break terminations for indoor and outdoor use: 200 A loadbreak premolded rubber elbow connectors with bushing inserts, suitable for submersible applications. Separable connectors shall comply with the requirements of IEEE 386, and shall be interchangeable between suppliers. Allow sufficient slack in medium-voltage cable, ground, and drain wires to permit elbow connectors to be moved to their respective parking stands.//

3. Ground metallic cable shields with a device designed for that purpose, consisting of a solderless connector enclosed in watertight rubber housing covering the entire assembly.

4. Provide insulated cable supports to relieve any strain imposed by cable weight or movement. Ground cable supports to the grounding system.

2.3 FIREPROOFING TAPE

A. Fireproofing tape shall be flexible, non-corrosive, self-extinguishing, arcproof, and fireproof intumescent elastomer. Securing tape shall be glass cloth electrical tape not less than 0.18 mm (7 mils) thick, and

19 mm (0.75 inch) wide.

PART 3 - EXECUTION

3.1 GENERAL

A. Installation shall be in accordance with the NEC, as shown on the drawings, and manufacturer’s instructions.

B. Cable shall be installed in conduit above grade and duct bank below grade.

C. All cables of a feeder shall be pulled simultaneously.

D. Conductors of different systems (e.g., 5kV and 15kV) shall not be installed in the same raceway.

E. Splice the cables only in manholes and pullboxes.

Attachment #2 - 9 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 6

F. Ground shields in accordance with Section 26 05 26, GROUNDING AND

BONDING FOR ELECTRICAL SYSTEMS.

G. Cable maximum pull length, maximum pulling tension, and minimum bend radius shall conform with the recommendations of the manufacturer.

H. Use suitable lubricating compounds on the cables to prevent pulling damage. Provide compounds that are not injurious to the cable jacket and do not harden or become adhesive.

I. Seal the cable ends prior to pulling, to prevent the entry of moisture or lubricant.

3.2 PROTECTION DURING SPLICING OPERATIONS

A. Blowers shall be provided to force fresh air into manholes where free movement or circulation of air is obstructed. Waterproof protective coverings shall be available on the work site to provide protection against moisture while a splice is being made. Pumps shall be used to keep manholes dry during splicing operations. Under no conditions shall a splice or termination be made that exposes the interior of a cable to moisture. A manhole ring at least 150 mm (6 inches) above ground shall be used around the manhole entrance to keep surface water from entering the manhole. Unused ducts shall be plugged and water seepage through ducts in use shall be stopped before splicing.

3.3 PULLING CABLES IN DUCTS AND MANHOLES

A. Cables shall be pulled into ducts with equipment designed for this purpose, including power-driven winches, cable-feeding flexible tube guides, cable grips, pulling eyes, and lubricants. A sufficient number of qualified workers and equipment shall be employed to ensure the careful and proper installation of the cable.

B. Cable reels shall be set up at the side of the manhole opening and above the duct or hatch level, allowing cables to enter through the opening without reverse bending. Flexible tube guides shall be installed through the opening in a manner that will prevent cables from rubbing on the edges of any structural member.

C. Cable shall be unreeled from the top of the reel. Pay-out shall be carefully controlled. Cables to be pulled shall be attached through a swivel to the main pulling wire by means of a suitable cable grip and pulling eye.

D. Woven-wire cable grips shall be used to grip the cable end when pulling small cables and short straight lengths of heavier cables.

Attachment #2 - 10 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 7

E. Pulling eyes shall be attached to the cable conductors to prevent damage to the cable structure.

F. Cables shall be liberally coated with a suitable lubricant as they enter the tube guide or duct. Rollers, sheaves, or tube guides around which the cable is pulled shall conform to the minimum bending radius of the cable.

G. Cables shall be pulled into ducts at a reasonable speed. Cable pulling using a vehicle shall not be permitted. Pulling operations shall be stopped immediately at any indication of binding or obstruction, and shall not be resumed until the potential for damage to the cable is corrected. Sufficient slack shall be provided for free movement of cable due to expansion or contraction.

H. Splices in manholes shall be firmly supported on cable racks. Cable ends shall overlap at the ends of a section to provide sufficient undamaged cable for splicing.

I. Cables cut in the field shall have the cut ends immediately sealed to prevent entrance of moisture.

3.4 SPLICES AND TERMINATIONS

A. Install the materials as recommended by the manufacturer, including precautions pertaining to air temperature and humidity during installation.

B. Installation shall be executed by qualified person trained to perform medium-voltage equipment installations. Tools shall be as recommended or provided by the manufacturer. Installation shall comply with manufacturer’s instructions.

C. Splices in manholes shall be located midway between cable racks on walls of manholes, and supported with cable arms at approximately the same elevation as the enclosing duct.

D. Where the Government determines that unsatisfactory splices and terminations have been installed, the Contractor shall replace the unsatisfactory splices and terminations with approved material at no additional cost to the Government.

3.5 FIREPROOFING

A. Cover all cable segments exposed in manholes and pullboxes with fireproofing tape.

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MEDIUM-VOLTAGE CABLES 26 05 13 - 8

B. Apply the tape in a single layer, wrapped in a half-lap manner, or as recommended by the manufacturer. Extend the tape not less than 25 mm (1 inch) into each duct.

C. At each end of a taped cable section, secure the fireproof tape in place with glass cloth tape.

3.6 CIRCUIT IDENTIFICATION OF FEEDERS

A. In each manhole and pullbox, install permanent identification tags on each circuit's cables to clearly designate the circuit identification and voltage. The tags shall be the embossed brass type, 40 mm (1.5 inches) in diameter and 40 mils thick. Attach tags with plastic ties.

Position the tags so they will be easy to read after the fireproofing tape is installed.

3.7 ACCEPTANCE CHECKS AND TESTS

A. General:

1. Perform tests in accordance with the latest IEEE 400 and 400.2, manufacturer's recommendations, and as specified in this specification.

2. Contractor shall make arrangements to have tests witnessed by the

Resident Engineer. Contractor shall proceed with tests only after obtaining approval from the Resident Engineer.

B. Visual Inspection: Perform visual inspection prior to electrical tests.

1. Inspect exposed sections of cables for physical damage.

2. Inspect shield grounding, cable supports, splices, and terminations.

3. Verify that visible cable bends meet manufacturer’s minimum bending radius requirement.

4. Verify installation of fireproofing tape and identification tags.

5. At the time of final acceptance, Contractor shall provide the

Resident Engineer visual field inspection notes, findings, and photographs detailing accessible inspection locations.

C. Electrical Tests - New Cables: Perform preparation and tests in order shown below:

1. Preparation Prior to Testing: Splices and terminations applied to new cables shall be completed prior to testing. For renovation installation, ends of new cables intended to be spliced to existing service-aged cables shall be prepared (cut back) to allow testing

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MEDIUM-VOLTAGE CABLES 26 05 13 - 9

without flashover or tracking. Cables shall not be connected to other equipment while under test.

2. Perform Insulation-Resistance Test. Test all cables with respect to ground and adjacent cables. All adjacent cables shall be grounded during testing.

a. Apply test voltage for a period sufficient to stabilize output voltage and insulation resistance measurement.

b. Test data shall include megohm, applied test voltage, and leakage current readings.

c. Further testing shall not continue unless the insulation resistance test results meet or exceed the values listed below.

Test voltages and minimum acceptable resistance values shall be:

Voltage Class Test Voltage Min. Insulation Resistance

5kV 2,500 VDC 1,000 megohms

15kV 2,500 VDC 5,000 megohms

25kV 5,000 VDC 20,000 megohms

35kV 15,000 VDC 100,000 megohms

3. Perform Tan Delta test. Review test readings with the Resident

Engineer prior to proceeding with the Very Low Frequency (VLF)

Withstand test

4. Perform Very Low Frequency (VLF) Withstand test. Utilize test voltages in accordance with IEEE 400.2.

D. Electrical Tests - Service-Aged Cables: Tests shall be performed for serviced-age cables before inter-connecting to new cables. Perform tests in order shown below:

1. Preparation Prior to Testing: Splices and terminations applied to cables shall be completed prior to testing. Ends of cables intended to be spliced to existing service-aged cables shall be prepared (cut back) to allow testing without flashover or tracking. Cables shall not be connected to other equipment while under test.

2. Perform Insulation-Resistance Test. Test all cables with respect to ground and adjacent cables. All adjacent cables shall be grounded during testing.

a. Apply test voltage for a period sufficient to stabilize output voltage and insulation resistance measurement.

b. Test data shall include megohm, applied test voltage, and leakage current readings.

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MEDIUM-VOLTAGE CABLES 26 05 13 - 10

c. Further testing shall not continue unless the insulation resistance test results meet or exceed the values listed below.

Test voltages and minimum acceptable resistance values shall be:

Voltage Class Test Voltage Min. Insulation Resistance

5kV 2,500 VDC 1,000 megohms

15kV 2,500 VDC 5,000 megohms

25kV 5,000 VDC 20,000 megohms

35kV 15,000 VDC 100,000 megohms

3. Perform Tan Delta test. Review test readings with the Resident

Engineer prior to proceeding with the VLF Withstand test.

4. Perform VLF Withstand test. Utilize test voltages in accordance with IEEE 400.2.

E. Electrical Tests – Inter-connected New Cables and Service-Aged Cables:

After successful Tan Delta and VLF Withstand testing of new cables and service-aged cables, perform final splicing inter-connecting between new and service-aged cables. Once new and service-aged cables are completely inter-connected, conduct Tan Delta and VLF Withstand tests for the entire inter-connected cable. Utilize maintenance test voltage for VLF Withstand testing.

F. Field Test Report: Submit a field test report to the Resident Engineer that includes the following information:

1. Project Name, Location, Test Date.

2. Name of Technician and Company performing the test.

3. Ambient temperature and humidity at time of test.

4. Name, Model Number and Description of Test Equipment used.

5. Circuit identification, cable length, cable type and size, insulation type, cable manufacturer, service age (if any), voltage rating, description of splices or terminations.

6. Visual field inspection notes, findings, and photographs.

7. Insulation Resistance Test results:

a. Test voltage.

b. Measurement in Megohms.

c. Leakage current.

8. Tan Delta results:

a. Test voltage.

b. Waveform (sinusoidal or cosine-rectangular).

Attachment #2 - 14 of 30

MEDIUM-VOLTAGE CABLES 26 05 13 - 11

c. Mean Tan Delta at V0.

d. Stability measured by Standard Deviation at V0.

e. Differential Tan Delta.

f. IEEE Condition Assessment Rating.

9. VLF Withstand results:

1) Test voltage.

2) Waveform (sinusoidal or cosine-rectangular).

3) Pass/Fail Rating.

10. Conclusions. If any deficiency is discovered based on test results, provide recommendations for corrective action.

G. Final Acceptance: Final acceptance shall depend upon the satisfactory performance of the cables under test. No cable shall be put into service until all tests are successfully passed, and field test reports have been approved by the Resident Engineer.

---END---

Attachment #2 - 15 of 30

PAD-MOUNTED, LIQUID-FILLED,

MEDIUM-VOLTAGE TRANSFORMERS 26 12 19 - 1

SECTION 26 12 19

PAD-MOUNTED, LIQUID-FILLED, MEDIUM-VOLTAGE TRANSFORMERS

PART 1 - GENERAL

1.1 DESCRIPTION

A. This section specifies the furnishing, installation, connection, and testing of the pad-mounted, liquid-filled, medium-voltage transformers, indicated as transformers in this section.

1.2 RELATED WORK

A. Section 03 30 00, CAST-IN-PLACE CONCRETE: Requirements for concrete equipment pads.

B. Section 09 06 00, SCHEDULE FOR FINISHES: Finishes for electrical equipment.

C. Section 13 05 41, SEISMIC RESTRAINT REQUIREMENTS FOR NON-STRUCTURAL

COMPONENTS: Requirements for seismic restraint of non-structural components.

D. Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS:

Requirements that apply to all sections of Division 26.

E. Section 26 05 13, MEDIUM-VOLTAGE CABLES: Medium-voltage cables.

F. Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS:

Requirements for personnel safety and to provide a low impedance path to ground for possible ground currents.

G. Section 26 05 41, UNDERGROUND ELECTRICAL CONSTRUCTION: Manholes, pull-boxes, and ducts for underground raceway systems.

H. Section 26 05 73, OVERCURRENT PROTECTIVE DEVICE COORDINATION STUDY:

Short circuit and coordination study, and requirements for a coordinated electrical system.

1.3 QUALITY ASSURANCE

A. Quality Assurance shall be in accordance with Paragraph, QUALIFICATIONS

(PRODUCTS AND SERVICES) in Section 26 05 11, REQUIREMENTS FOR

ELECTRICAL INSTALLATIONS.

1.4 FACTORY TESTS

A. Factory Tests shall be required.

B. Factory Tests shall be in accordance with Paragraph, MANUFACTURED

PRODUCTS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL

INSTALLATIONS, and the following requirement:

1. Transformers shall be thoroughly tested at the factory to ensure that there are no electrical or mechanical defects. Tests shall be

Attachment #2 - 16 of 30

MEDIUM-VOLTAGE TRANSFORMERS 26 12 19 - 2

conducted as per IEEE Standards. Factory tests shall be certified.

The following tests shall be performed:

a. Perform insulation-resistance tests, winding-to-winding and each winding-to-ground.

b. Perform turns-ratio tests at all tap positions.

1.5 SUBMITTALS

A. Submit in accordance with Paragraph, SUBMITTALS in Section 26 05 11, REQUIREMENTS FOR ELECTRICAL INSTALLATIONS, and the following requirements:

1. Shop Drawings:

a. Submit sufficient information to demonstrate compliance with drawings and specifications.

b. Include electrical ratings, nameplate data, impedance, outline drawing with dimensions and front, top, and side views, weight, mounting details, decibel rating, termination information, temperature rise, no-load and full-load losses, regulation, overcurrent protection, connection diagrams, and accessories.

c. Complete nameplate data, including manufacturer’s name and catalog number.

d. Certification from the manufacturer that representative transformers have been seismically tested to International

Building Code requirements. Certification shall be based upon simulated seismic forces on a shake table or by analytical methods, but not by experience data or other methods.

2. Manuals:

a. When submitting the shop drawings, submit companion copies of complete maintenance and operating manuals, including technical data sheets, wiring diagrams, and information for ordering replacement parts.

1) Identify terminals on wiring diagrams to facilitate installation, maintenance, and operation.

2) Indicate on wiring diagrams the internal wiring for each piece of equipment and interconnections between the pieces of equipment.

3) Approvals will be based on complete submissions of manuals, together with shop drawings.

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MEDIUM-VOLTAGE TRANSFORMERS 26 12 19 - 3

b. If changes have been made to the maintenance and operating manuals originally submitted, submit updated maintenance and operating manuals two weeks prior to the final inspection.

1) Update the manual to include any information necessitated by shop drawing approval.

2) Show all terminal identification.

3) Include information for testing, repair, troubleshooting, assembly, disassembly, and recommended maintenance intervals.

4) Provide a replacement parts list with current prices. Include a list of recommended spare parts, tools, and instruments for testing and maintenance purposes.

B. Certifications:

1. Two weeks prior to the final inspection, submit the following certifications.

a. Certification by the manufacturer that the transformers conform to the requirements of the drawings and specifications.

b. Certification by the Contractor that the transformers have been properly installed, connected, and tested.

1.6 APPLICABLE PUBLICATIONS

A. Publications listed below (including amendments, addenda, revisions, supplements, and errata) form a part of this specification to the extent referenced. Publications are referenced in the text by designation only.

B. American Society for Testing and Materials (ASTM):

D3487-16................Standard Specification for Mineral Insulating

Oil Used in Electrical Apparatus

C. Institute of Electrical and Electronic Engineers (IEEE):

48-09...................Test Procedures and Requirements for

Alternating-Current Cable Terminations Used on

Shielded Cables Having Laminated Insulation

Rated 2.5kV Through 765kV or Extruded

Insulation Rated 2.5kV Through 500kV

386-16..................Separable Insulated Connector Systems for Power

Distribution Systems Above 600 V

592-07..................Exposed Semiconducting Shields on High-Voltage

Cable Joints and Separable Connectors

C2-17...................National Electrical Safety Code

Attachment #2 - 18 of 30

MEDIUM-VOLTAGE TRANSFORMERS 26 12 19 - 4

C37.47-11...............Specification for High Voltage (>1000V)

Distribution Class Current-Limiting Fuses and

Fuse Disconnecting Switches

C57.12.00-15............Liquid-Immersed Distribution, Power and

Regulating Transformers

C57.12.10-13............Liquid-Immersed Power Transformers

C57.12.28-14............Pad-Mounted Equipment - Enclosure Integrity

C57.12.29-14............Pad-Mounted Equipment – Enclosure Integrity for

Coastal Environments

C57.12.34-15............Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers, 5 MVA and Smaller; High Voltage, 34.5 kV Nominal

System Voltage and Below; Low Voltage, 15kV

Nominal System Voltage and Below

C57.12.90-15............Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

C62.11-12...............Metal-Oxide Surge Arresters for AC Power

Circuits

D. International Code Council (ICC):

IBC-15..................International Building Code

E. National Electrical Manufacturers Association (NEMA):

TR 1-13.................Transformers, Regulators, and Reactors

F. National Fire Protection Association (NFPA):

70-17...................National Electrical Code (NEC)

G. Underwriters Laboratories Inc. (UL):

467-13..................Grounding and Bonding Equipment

H. United States Department of Energy (DOE):

10 CFR Part 431.........Energy Efficiency Program for Certain

Commercial and Industrial Equipment

PART 2 - PRODUCTS

2.1 GENERAL REQUIREMENTS

A. Transformers shall be in accordance with ASTM, IEEE, NFPA, UL, as shown on the drawings, and as specified herein. Each transformer shall be assembled as an integral unit by a single manufacturer.

B. Transformers shall be complete, outdoor type, continuous duty, integral assembly, grounded, tamper-resistant, and with liquid-immersed windings.

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C. Ratings shall not be less than shown on the drawings.

D. Completely fabricate transformers at the factory so that only the external cable connections are required at the project site.

E. Thoroughly clean, phosphatize, and finish all the metal surfaces at the factory with a rust-resistant primer and dark green enamel finish coat, except where a different color is specified in Section 09 06 00, SCHEDULE FOR FINISHES. All surfaces of the transformer that will be in contact with the concrete pad shall be treated with corrosion-resistant compounds and epoxy resin or a rubberized sealing compound.

2.2 COMPARTMENTS

A. Construction:

1. Enclosures shall be weatherproof and in accordance with IEEE

C57.12.29 when installed in coastal environments.

2. The medium- and low-voltage compartments shall be separated with a steel barrier that extends the full height and depth of the compartments.

3. The compartments shall be constructed of sheet steel (gauge to meet

ANSI requirements) with bracing and with reinforcing gussets using jig welds to assure rectangular rigidity.

4. All bolts, nuts, and washers shall be cadmium-plated steel.

5. Sufficient space shall be provided for equipment, cabling, and terminations within the compartments.

6. Affix transformer nameplate permanently within the low-voltage compartment. Voltage and kVA rating, connection configuration, impedance, date of manufacture, and serial number shall be shown on the nameplate.

B. Doors:

1. Provide a separate door for each compartment with provisions for a single padlock to secure all doors. Provide each compartment door with open-position doorstops and corrosion-resistant tamperproof hinges welded in place. The medium-voltage compartment door shall be mechanically prevented from opening unless the low-voltage compartment door is open.

2. The secondary compartment door shall have a one-piece steel handle and incorporate three-point locking mechanisms.

2.3 BIL RATING

A. 15 kV class equipment shall have a minimum 95 kV BIL rating.//

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2.4 TRANSFORMER FUSE ASSEMBLY

A. The primary fuse assembly shall be a combination of externally replaceable Bay-O-Net liquid-immersed fuses in series with liquid-immersed current-limiting fuses.

B. The primary fuse assembly shall be load-break combination fuse and dry-well fuse holder rated for system voltage, rated for 10 load makes and 10 load breaks, with rated 200 amp load current at 75% power factor, 10,000 symmetrical A close-in on fault duty, and 95 kV BIL. The entire fuse assembly shall be removable through the use of hot stick.

1. The fuses shall be concealed, hot stick removable, 50,000 A symmetrical interrupting, non-expulsion, current-limiting primary distribution type, of the size and voltage class as shown on the drawings. The fuses shall operate within the fuse holder as a unit disconnecting means. Fuses shall be in accordance with ANSI C37.47.

2. Transformers shall not have internal "weak link" fuses that require transformer tank cover removal for replacement.

3. For units above 500 kVA using fusing above the 50 A 15 kV and 100 A

5 kV application, a clip-mounted arrangement of the current limiting fuses (i.e., live-front configuration) is required.

2.5 PRIMARY CONNECTIONS

//A. Primary connections shall be 200 A dead-front loadbreak wells and inserts for cable sizes shown on the drawings.

B. Surge Arresters: Distribution class, one for each primary phase, complying with IEEE C62.11, supported from tank wall.

2.6 MEDIUM-VOLTAGE SWITCH

A. The transformer primary disconnect switch shall be an oil-immersed, internal, gang-operated, load-interrupter type, rated at ampacity and system voltage as shown on the drawings, with a minimum momentary withstand rating of not less than the calculated available fault current shown on the drawings.

B. For radial feeds, switch shall be a two-position, on-off, manual switch located in the medium-voltage compartment and hot-stick-operated.

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2.7 MEDIUM-VOLTAGE TERMINATIONS

A. Terminate the medium-voltage cables in the primary compartment with 200

A loadbreak premolded rubber elbow connectors, suitable for submersible applications. Elbow connectors shall have a semi-conductive shield material covering the housing. The separable connector system shall include the loadbreak elbow, the bushing insert, and the bushing well.

Separable connectors shall comply with the requirements of IEEE 386, and shall be interchangeable between suppliers. Allow sufficient slack in medium-voltage cable, ground, and drain wires to permit elbow connectors to be moved to their respective parking stands.

B. Ground metallic cable shield with a cable shield grounding adapter, consisting of a solderless connector enclosed in watertight rubber housing covering the entire assembly, bleeder wire, and ground braid.

2.8 TRANSFORMERS

A. Transformer ratings shall be as shown on drawings. kVA ratings shown on the drawings are for continuous duty without the use of cooling fans.

B. Temperature rises shall not exceed the NEMA TR 1 of 65˚ C (149˚ F) by resistance.

C. Transformer insulating material shall be less flammable, silicone-based dielectric, and UL listed as complying with NFPA 70 requirements for fire point of not less than 300˚ C (600˚ F) when tested according to

ASTM D 92. Liquid shall have low toxicity and be nonhazardous.

D. Transformer impedance shall be not less than 4-1/2% for sizes 150 kVA and larger. Impedance shall be as shown on the drawings.

E. Sound levels shall conform to NEMA TR 1 standards.

F. Primary and Secondary Windings for Three-Phase Transformers:

1. Primary windings shall be delta-connected.

2. Secondary windings shall be wye-connected, except where otherwise indicated on the drawings. Provide isolated neutral bushings for secondary wye-connected transformers.

3. Secondary leads shall be brought out through pressure-tight epoxy bushings.

G. Primary windings shall have four 2-1/2% full-capacity voltage taps; two taps above and two taps below rated voltage.

H. Core and Coil Assemblies:

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1. Cores shall be grain-oriented, non-aging, silicon steel to minimize losses.

2. Core and coil assemblies shall be rigidly braced to withstand the stresses caused by rough handling during shipment, and stresses caused by any possible short-circuit currents.

3. Coils shall be continuous-winding type without splices except for taps. Material shall be copper.

4. Coil and core losses shall be optimum for efficient operation.

5. Primary, secondary, and tap connections shall be brazed or pressure type.

6. Provide end fillers or tie-downs for coil windings.

I. The transformer tank, cover, and radiator gauge thickness shall not be less than that required by ANSI.

J. Accessories:

1. Provide standard NEMA features, accessories, and the following:

a. No-load tap changer. Provide warning sign.

b. Lifting, pulling, and jacking facilities.

c. Globe-type valve for oil filtering and draining, including sampling device.

d. Pressure relief valve.

e. Liquid level gauge and filling plug.

f. A grounding pad in the medium- and low-voltage compartments.

g. A diagrammatic nameplate.

h. Dial-type liquid thermometer with a maximum reading pointer and an external reset.

i. Hot stick. Securely fasten hot stick within low-voltage compartment.

2. The accessories shall be made accessible within the compartments without disassembling trims and covers.

K. Transformers shall meet the energy conservation standards for transformers per the United States Department of Energy 10 CFR Part

431.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install transformers outdoors, as shown on the drawings, in accordance with the NEC, and as recommended by the manufacturer.

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B. Anchor transformers with rustproof bolts, nuts, and washers not less than 12 mm (1/2 inch) diameter, in accordance with manufacturer’s instructions, and as shown on drawings.

C. In seismic areas, transformers shall be adequately anchored and braced per details on structural contract drawings to withstand the seismic forces at the location where installed.

D. Mount transformers on concrete slab. Unless otherwise indicated, the slab shall be at least 200 mm (8 inches) thick, reinforced with a 150 by 150 mm (6 by 6 inches) No. 6 mesh placed uniformly 100 mm (4 inches) from the top of the slab. Slab shall be placed on a 150 mm (6 inches) thick, well-compacted gravel base. The top of the concrete slab shall be approximately 100 mm (4 inches) above the finished grade. Edges above grade shall have 12-1/2 mm (1/2 inch) chamfer. The slab shall be of adequate size to project at least 200 mm (8 inches) beyond the equipment. Provide conduit turnups and cable entrance space required by the equipment to be mounted. Seal voids around conduit openings in slab with water- and oil-resistant caulking or sealant. Cut off and bush conduits 75 mm (3 inches) above slab surface. Concrete work shall be as specified in Section 03 30 00, CAST-IN-PLACE CONCRETE.

E. Grounding:

1. Ground each transformer in accordance with the requirements of the

NEC. Install ground rods per the requirements of Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS, to maintain a maximum resistance of 5 ohms to ground.

2. Connect the ground rod to the ground pads in the medium- and low-voltage compartments.

3. Install and connect the cable shield grounding adapter per the manufacturer’s instructions. Connect the bleeder wire of the cable shield grounding adapter to the loadbreak or deadbreak elbow grounding point with minimum No. 14 AWG wire, and connect the ground braid to the grounding system with minimum No. 6 AWG bare copper wire. Use soldered or mechanical grounding connectors listed for this purpose.

3.2 ACCEPTANCE CHECKS AND TESTS

A. Perform manufacturer’s required field tests in accordance with the manufacturer's recommendations. In addition, include the following:

1. Visual Inspection and Tests:

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a. Compare equipment nameplate data with specifications and approved shop drawings.

b. Inspect physical and mechanical condition. Check for damaged or cracked bushings and liquid leaks.

c. Verify that control and alarm settings on temperature indicators are as specified.

d. Inspect all field-installed bolted electrical connections, using the calibrated torque-wrench method to verify tightness of accessible bolted electrical connections, and perform thermographic survey after energization under load.

e. Vacuum-clean transformer interior. Clean transformer enclosure exterior.

f. Verify correct liquid level in transformer tank.

g. Verify correct equipment grounding per the requirements of

Section 26 05 26, GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS.

h. Verify the presence and connection of transformer surge arresters, if provided.

i. Verify that the tap-changer is set at rated system voltage.

3.3 FOLLOW-UP VERIFICATION

A. Upon completion of acceptance checks, settings, and tests, the

Contractor shall demonstrate that the transformers are in good operating condition and properly performing the intended function.

3.4 SPARE PARTS

A. Deliver the following spare parts for the project to the Resident

Engineer two weeks prior to final inspection:

1. Six insulated protective caps.

2. One spare set of medium-voltage fuses for each size and type of fuse used in the project.

3. One spare set of three cable fault indicators.

3.5 INSTRUCTION

A. The Contractor shall instruct maintenance personnel, for not less than one 2-hour period, on the maintenance and operation of the equipment on the date requested by the Resident Engineer.

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2.5 SUB-BASE FUEL TANK

A. A UL-142 secondary containment tank sized to allow the engine generator set to operate at 100% load for a minimum of 96 hours shall be provided

B. Tank shall be equipped to meet NFPA 30, 37, and all local codes

C. Fuel Tank Construction

1 Tank basin shall be constructed with wide flange beam main rails.

2. All other basin material shall be a minimum of 7ga. HRS.

3. All other inner tank material shall be minimum 10ga. HRS.

4. Interior tank baffle spacing is not to exceed 42” over the length of the tank or 48” over the width of the tank.

5. Conduit stub-up opening in tank as required.

6. Engine mounting rails shall be constructed of C - channel running the length of the engine base and sized appropriately. Rails must be drilled to accept spring type vibration isolators.

7. Emergency venting shall be provided for main storage tank and the rupture basin.

8. Tank shall include four plate lifting eyes UL-142 rated to lift the entire assembled generator package including the fuel tank, enclosure, and generator.

9. Tank shall be tested to UL-142 standards and be UL-142 listed as a secondary containment tank.

10. Tank shall also be equipped with the following options

a. 2” NPT fuel fill with lockable cap.

b. Removable fuel pick up and return dip tubes

c. Normal and emergency venting.

d. Mechanical fuel level gauge.

e. Low level alarm float switch (50%).

f. Low level alarm float switch (25%).

g. Leak alarm float switch.

h. 1” basin drain.

D. Surface prep and finish.

1. Clean entire Tank per SSPC-SP- 3.

2. Chemically clean all surfaces

3. Caulk all exterior seams with polyurethane sealant.

4. Apply two coats of rust inhibitive primer (2mil DFT).

5. Apply two coats of PPG Amercoat 450H Acrylic Aliphatic polyurethane finish paint (2mil DFT).

6. Color to match Generator Set Enclosure

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