W912DW21R0021 R0003 AFD MUT INSTALLATION.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

W912DW21R0027R0003

AFD Main Unit Transformer Installation, Oldtow n, Idaho

(see continuation page)

1. CONTRACT ID CODE PAGE OF PAGES

1 3

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 15-Jun-2021

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W912DW21R0021

X 9B. DATED (SEE ITEM 11)

17-May-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer X is extended, is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

15-Jun-2021

CODE

USA ENGINEER DISTRICT, SEATTLE

ATTN: CENWS-CT

4735 EAST MARGINAL WAY SOUTH, BLDG. 1202

SEATTLE WA 98134-2388

W912DW 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912DW21R0021

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

R0003

1. This amendment three (0003) provides for the following:

a. Revision of spec sections:

01 12 16.00 27 26 05 00.00 26 26 05 19.00 26

b. Revision of drawing:

E-801

c. Provision of cut sheet for the existing lights on structure, in response to bidder inquiry.

d. Inclusion of additional Point of Contact for Contracting:

Please include Alex Marcinkiewicz in all future correspondence regarding this solicitation.

email: Alex.R.Marcinkiewicz@usace.army.mil

2. The proposal submittal time and date is extended to July 7, 2021 at 10:00:00 a.m. LOCAL TIME. The SF1442 Solicitation, Offer and Award is revised to reflect the date extension.

3. The attached revised sections are to be replaced in their entirety. Specifications changes are generally identified, for convenience, either by strikeout for deletions, and double underlining of text for additions or a single dark line in the margin. All portions of the revised sections shall apply whether or not changes have been indicated.

4. NOTICE TO OFFERORS: Offerors must acknowledge receipt of this amendment by number and date on offer.

Encl:

01 12 16.00 27 (revised) 26 05 00.00 26 (revised) 26 05 19.00 26 (revised) E-801 (revised) OLAW2353K120PEBZM2 (new)

SUMMARY OF CHANGES

SECTION 00 10 00 - SOLICITATION

The required response date/time has changed from 16-Jun-2021 10:00 AM to 07-Jul-2021 10:00 AM.

(End of Summary of Changes)

W912DW21R0021

AFD Main Unit Transformer Installation 20027 Pend Oreille River, ID W912DW21R0021

SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 12 16.00 27

WORK SEQUENCE

01/19/21

PART 1 GENERAL

1.1 COORDINATION

1.2 SUBMITTALS

1.3 EQUIPMENT REPLACEMENT AND CUTOVER PLAN

1.4 TEMPORARY POWER

1.5 OUTAGES

1.5.1 Generating Unit Outage Requests

1.5.2 Initial Total Plant Outage

1.6 SEQUENCE OF WORK

PART 2 PRODUCTS

2.1 Temporary Power Cables

PART 3 EXECUTION

-- End of Section Table of Contents --

SECTION 01 12 16.00 27 Page 1

01 12 16.00 27

WORK SEQUENCE

01/19/21

PART 1 GENERAL

The work covered by this section of the specifications consists of work common to more than one section of these TECHNICAL SPECIFICATIONS.

1.1 COORDINATION

The construction sequence is critical in maintaining operability of Albeni Falls Dam's main unit generators, transformers and transmission lines during this work. Equipment and systems outages shall be kept to a minimum and shall be coordinated with the Contracting Officer's Representative (COR). Temporary outages will be required as loads are transferred from existing equipment to new equipment. Proper sequencing of the work shall be required to minimize the duration of these outages.

All loads must be supported by Government approved temporary power sources furnished by the Contractor 24 hours a day, 7 days a week during the affected work.

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals having an "I" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00, SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

EQUIPMENT REPLACEMENT AND CUTOVER PLAN; G, HDC

SD-03 Product Data

Temporary Power Cables; I, HDC

1.3 EQUIPMENT REPLACEMENT AND CUTOVER PLAN

Submit at least 90 days prior to the start of equipment installation the proposed step-by-step removal and installation procedure and system cutover schedule. This schedule's format shall match the Contractor's project schedule submissions as required in section 01 32 01.00 28 "PROJECT SCHEDULE." The plan shall include a detailed sequential list of activities, duration of each activity, duration of all outages required, and temporary power plan if required. The plan shall reflect the coordination with the Government's safe clearance procedure (LOCK-OUT/TAG-OUT) for de-energizing equipment. The plan shall be coordinated with the overall project schedule required by SECTION 01 32 01.00 28 PROJECT SCHEDULE. No work will be allowed to commence until the plan is approved. Any revisions to the approved plan shall be submitted for approval.

SECTION 01 12 16.00 27 Page 2

The Contractor shall provide information regarding what temporary power equipment that will be used. The plan shall include a connecting means for existing cabling that utilizes bolt on connections via a termination enclosure.

1.4 TEMPORARY POWER

Contractor must provide Temporary Power to Low Voltage 480V Switchyard Panel loads and Panelboards LC-14 and LC-15 loads. This will require but is not limited to:

1. Temporary 480VAC power panel.

2. Temporary 480-120/240VAC transformer.

3. Temporary 120/240VAC power panel.

Temporary equipment may be set up in the cable tunnel. Additional equipment may require temporary power. The Government will not pay additional compensation for equipment requiring temporary power not specifically listed here. Electric power will be available at project site for work to be performed under these specifications.

1. 480-volt power cabinet feeder cables:

a. Existing feeder cables to the 480V power cabinet to be disconnected and reused for this purpose. Provide continuity of power by disconnecting and reterminating only one of the redundant feeders at a time.

1.5 OUTAGES

1.5.1 Generating Unit Outage Requests

The Government must provide notice to Bonneville Power Administration (BPA) 30 days in advance of any time main generating units are unable to provide power. Due to this requirement, all main generating unit outage requests will require notice to the Contracting Officer 24 work days in advance. Work days are Monday thru Thursday. Notice provided after 1630 will be considered received on the next business day. This requirement does not apply to outages which will not affect the ability to produce power from generating units.

1.5.2 Initial Total Plant Outage

The initial total plant outage to replace all lightning arresters and tower lighting shall be limited to three (3) weeks.

1.6 SEQUENCE OF WORK

This section lists portions of work that must be completed at specific times or in a specific order. It includes the recommended sequence of work to minimize outages and disruptions during the required installations. The sequence of work represents the major elements of work that require additional considerations and is not to be construed as all-inclusive. All ancillary work required for a complete and functional installation as defined by the contract documents and sequence of work shall be the responsibility of the Contractor and shall be incorporated

SECTION 01 12 16.00 27 Page 3 into the proposed "Equipment Replacement and Cutover Plan." The Contractor may propose changes to the sequence of work, for approval, if the changes improve installation schedules, reduce system or equipment outages, or result in improved functional reliability. The Contractor must incorporate these requirements into the work plan and schedule.

a. Replace all lightning arresters and tower lighting within the outage window. Subsequent work will require a suficient physical separation from the 115kV bus to not require the 115kV bus to be deenergized.

b. Transformer 2 must be replaced first and may be started as early as March 2022, weather permitting.

c. The Government's preferred sequence of transformer replacement following Transformer 2 completion is Transformer 1 with a completion by November 1, 2022 or before weather prohibits completion.

Transformer 3 would be available for replacement as early as March 31, 2023 or as weather allows.

d. The 480V power panel and LC-14 may be replaced concurrently, or in either order, at the contractor's preference, provided that temporary power is available to all affected loads.

e. LC-15 cannot be removed until both the 480V power panel and LC-14 are replaced.

f. When replacing 480V power panel feeder cables, maintain continuity of power to station service loads to the maximum extent possible by ensuring that one station service bus remains in service at all times.

PART 2 PRODUCTS

2.1 Temporary Power Cables

Temporary power cables must comply with specification 26 05 19.00 26

INSULATED WIRE AND CABLE.

PART 3 EXECUTION

Not used.

-- End of Section --

SECTION 01 12 16.00 27 Page 4

ALF XFMR Final

SECTION 26 05 00.00 26

BASIC ELECTRICAL MATERIALS AND METHODS

09/ 20

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

This section also applies to the equipment to be furnished and installed under Section 26 05 19.00 26, INSULATED WIRE AND CABLE; 26 05 26.00 26, GROUNDING AND GROUND TESTING; and 26 28 00.00 26 SWITCHBOARDS AND PANELBOARDS. These sections are meant to be complimentary and where any conflict between them occurs, apply the most stringent requirements. This section covers the electrical work required to remove three generator step-up (GSU) transformers and to connect and complete the installation of the replacement three GSU transformers at Albeni Falls Powerhouse and Switchyard. Electrical equipment and site-work includes but is not limited to:

a. Removal of three existing Pennsylvania Transformer three-phase power transformers rated 13,750/18,333 kVA, 115/13.2 kV, class OA/FA cooling. Nameplate information indicates oil capacity of 6,525 gallons and the following approximate weights:

Core and Coils: 49,000 lbs Case and Fittings: 38,400 lbs Oil: 48,900 lbs Total weight: 136,300 lbs

Transformers to be transported off site and properly disposed of.

b. Removal and disposal of existing surge arresters and installation of new surge arresters in the same location as existing arresters.

c. Removal of existing neutral CT and installation of new neutral CT associated with each transformer.

d. Removal and disposal of 440VAC Power Cabinet, 120VAC panel LC15 and associated 7.5 kVA three-phase 480/120 V transformer, and 120VAC panel LC14 and associated three 10 kVA single-phase 480/120 VAC transformers. Installation of one new 480VAC panelboard, one new 120/240V panelboard LC14, and one new 15 kVA single-phase 480/120-240V transformer. The loads of existing panelboard LC15 will be incorporated into new LC14. LC15 will not be replaced.

e. Complete installation of the three 15,000/20,000 kVA three-phase GSU replacement transformers after they are transported and set in place by the supply contractor.

f. Adjustment and reconnection of the existing 15 kV tubular bus conductors from the transformer structure to the transformer low voltage terminals. Replacement and reconnection of the high voltage conductor, AWG #2, from the transformer bushings to the surge arrester terminals to the 115kV bus, including the install of insulator supports for the HV conductors.

SECTION 26 05 00.00 26 Page 1

g. Installation and commissioning of new Dissolved Gas Analyzer for each transformer.

h. Installation of nitrogen cabinets provided by the Government.

g. Repair or install new ground grid beneath oil containment and connect to the existing switchyard grounding system.

i. Removal of MOD switch operator's grounding platform and switchyard tower lights, as shown on the contract drawings.

j. Installation of new MOD switch operator's grounding platform and switchyard tower lights as shown on the contract drawings.

1.2 REFERENCES

ASTM INTERNATIONAL (ASTM)

ASTM D709 (2017) Standard Specification for Laminated Thermosetting Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2017 ; Errata 1-2 2017; INT 1 2017 ) National Electrical Safety Code

IEEE C57.12.01 (2015) General Requirements for Dry-Type Distribution and Power Transformers Including Those with Solid-Cast and/or Resin-Encapsulated Windings

IEEE C62.11 (2012) Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1kV)

IEEE 80 (2013) Guide for Safety in AC Substation Grounding

NATIONAL ELECTRICAL CONTRACTORS ASSOCIATION (NECA)

NECA 101 (2013) Standard for Installing Steel Conduits (Rigid, IMC, EMT)

NECA/NEIS 1 (2015) Good Workmanship in Electrical Construction

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA C29.1 (2018) Test Methods for Electrical Power Insulators

NEMA C29.5 (2015) Wet-Process Porcelain Insulators - Low- and Medium-Voltage Type

NEMA C29.7 (2015) Wet-Process Porcelain Insulators - High-Voltage Line Post-Type

NEMA C80.1 ( 2015 ) American National Standard for

SECTION 26 05 00.00 26 Page 2

Electrical Rigid Steel Conduit (ERSC)

NEMA FB 1 (2014) Fittings, Cast Metal Boxes, and Conduit Bodies for Conduit, Electrical Metallic Tubing, and Cable

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (20 20) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 489 (2016) Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 514B (2012; Reprint May 2020 ) Conduit, Tubing and Cable Fittings

UL 6 (2007; Reprint Sep 2019 ) Electrical Rigid Metal Conduit-Steel

UL 360 (2013; Reprint Jun 2019 ) Liquid-Tight Flexible Metal Conduit

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals having an "I" designation are for information only. A designation following the "G" or "I" designation identifies the office that will review the submittal for the Government. The following must be submitted in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

SD-03 Product Data

Within 90 calendar days after Notice to Proceed , submit complete descriptive literature and specifications of each product or system of products listed with original, legible manufacturer's cut sheets and data sheets to clearly indicate physical construction, operation, electrical characteristics, ratings, and associated hardware, as applicable. Include manufacturer's catalog numbers and designations, and clearly cross-reference with shop drawings as appropriate. Product data submitted for approval must clearly show conformance with these specifications, including, but not being limited to, product manufacturers' declarations of conformance to applicable technical standards. Product data must be approved prior to procurement of associated materials and equipment.

Station Post Insulators ; G, HDC

15 kV Tubular Bus Conductors ; G, HDC

Rigid Metal Conduit ; G, HDC

Liquid-Tight Flexible Metal Conduit ; G, HDC

Rigid Metallic Conduit Fittings ; G, HDC

Flexible Conduit Fittings ; G, HDC

SECTION 26 05 00.00 26 Page 3

Molded Case Circuit Breakers ; G, HDC

Terminal Blocks ; G, HDC

Escutcheons and Nameplates ; G, HDC

Transformers

Surge Arresters ; G, HDC

On-line Dissolved Gas and Moisture Content Monitor

Neutral Current Transformers

SD-06 Test Reports

Station Post Insulator Tests; G, HDC

SD-08 Manufacturer's Instructions

Spare Parts ; G, HDC

1.4 GENERAL REQUIREMENTS

1.4.1 Materials, Equipment and Installation

New materials and equipment must be furnished and any defective material or equipment damaged in the course of installation must be replaced or repaired. Testing must be performed to check the installation of and the proper operational functions of the electrical equipment. The installations must be in accordance with the National Electrical Code, NFPA 70 , and the National Electrical Safety Code, IEEE C2 , except where otherwise specifically shown or specified, in which case the drawings and specifications must govern. Omission of details on the drawings or in the specifications must not be construed as permitting deviations from Code requirements.

1.4.2 Standard Products

Material and equipment must be the standard products of manufacturers regularly engaged in the manufacture of these products and must essentially duplicate items that have been in satisfactory use for at least 5 years prior to proposal due date.

1.4.3 Corrosion Prevention

1.4.3.1 General

All equipment must be protected to prevent deterioration from corrosion.

The general requirements are specified below; however, other corrosion-resisting treatments that are the equivalent of those specified may be used. Materials used for corrosion prevention must be submitted for approval under SD-03 Product Data.

1.4.3.2 Fastenings and Fittings

Screws, bolts, nuts, pins, studs, springs, washers and other miscellaneous fastening and fittings must be of corrosion-resistant material or must be treated in an approved manner to render them resistant to corrosion. All

SECTION 26 05 00.00 26 Page 4 fastenings which are to be exposed directly to the weather must be of corrosion-resisting material.

1.4.3.2.1 Corrosion-Resisting Materials

Corrosion-resisting steel, copper, brass, bronze, copper-nickel-copper alloys are acceptable corrosion-resisting materials.

1.4.3.3 Corrosion-Resisting Treatments

Treatments must be in accordance with ASTM A123/A123M or ASTM A153/A153M.

1.5 DELIVERY, STORAGE AND HANDLING

Ship the equipment and/or materials as completely assembled and wired as feasible so as to require a minimum of installation work. Each shipping section is properly match marked to facilitate reassembly. Provide equipment with removable lifting channels with eye bolts for attachment of crane slings to facilitate lifting and handling. Carefully pack and ship separately any relay or other device which cannot withstand the hazards of shipment when mounted in place on the equipment. Mark these devices with the number of the panel which they are to be mounted on and fully identified. Wrap all finished painted surfaces and metal work to protect from damage during shipment. Prepare all parts for shipment so that slings for handling may be attached readily while the parts are in a railway car or transport truck.

1.6 CONTRACT DRAWINGS

1.6.1 General

a. The contract drawings indicate the work to be accomplished in as much detail as is practical. Except for such modifications as may be required for coordination with equipment actually furnished, they constitute the working drawings for construction and for purchase of required materials. The contract drawings must be superseded by manufacturer's shop drawings when available

b. Field verify all existing dimensions, details, and features relevant to requirements for equipment, apparatus, and other coordinating features required for the design, manufacture, and installation of the new equipment and accessories.

1.6.2 Departure From Drawings

If departures from the contract drawings are necessary, details of such departures and reasons for them must be submitted not later than 90 days before scheduled installation date. No such departures will be made without prior written approval. The control schemes shown on the contract drawings are not intended to exclude the Contractor's method for accomplishing the functions indicated. However, if any alternate equipment is approved, the Contractor must bear the cost and be responsible for furnishing and installing any additional wiring devices that are required.

SECTION 26 05 00.00 26 Page 5

PART 2 PRODUCTS

2.1 MATERIALS AND EQUIPMENT

2.1.1 Compliance with Standards

Equipment shall be new and meet all applicable NEMA and UL construction and rating requirements. No equivalent will be acceptable. Immediately notify the Contracting Officer of any requirements of the specifications or Contractor proposed materials or assemblies that do not comply with UL or NEMA. International Electrotechnical Commission (IEC) rated equipment will not be considered an acceptable alternative to specified NEMA ratings.

2.1.2 Standard Products

Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship, and have been in satisfactory industrial use for 5 years prior to bid opening including applications of equipment and materials under similar circumstances and of similar size.

2.2 CONDUIT, RACEWAYS, DUCTS, FITTINGS AND HANGERS

2.2.1 Rigid Metal Conduit

Rigid metal conduit, including couplings, shall conform to UL 6 and/or NEMA C80.1 and must be zinc-coated both inside and outside by hot-dip galvanizing method.

2.2.2 Liquid-Tight Flexible Metal Conduit

Liquid-tight flexible metal conduit shall be made from steel strip that is zinc-coated by the hot-dip galvanizing method with an integral or separate bonding wire or and water-proof extruded PVC cover and conforming to UL 360 .

2.2.3 Rigid Metallic Conduit Fittings

Threaded fittings for rigid conduit shall be made of solid zinc or malleable iron and listed to UL 514B and/or NEMA FB 1 . Threadless fittings shall not be used. Malleable iron fittings must be zinc-coated both inside and outside by hot-dip galvanizing method. Hubs must have a grounding screw on the locknut. Expansion fittings must have a maximum of 4 inches of travel and have external flexible copper braid bonding jumper.

2.2.4 Flexible Conduit Fittings

Flexible conduit fittings shall be made from steel or malleable iron with a zinc coating for flexible metal conduit with positive bonding, and conforming to UL 514B .

2.3 MOLDED CASE CIRCUIT BREAKERS

Molded case circuit breakers shall conform to the applicable requirements of UL 489 . The circuit breakers shall be manually-operated, shall be quick-make, quick-break, common trip type, and shall be of automatic-trip type unless otherwise specified or indicated on the drawings. All poles of each breaker shall be operated simultaneously by means of a common handle.

The operating handles shall clearly indicate whether the breakers are in

SECTION 26 05 00.00 26 Page 6

"On," "Off," or "Tripped" position and shall have provisions for padlocking in the "Off" position. Personnel safety line terminal shields shall be provided for each breaker. The circuit breakers shall be products of only one manufacturer, and shall be interchangeable when of the same frame size. The contacts shall be suitable for 125 VDC and shall reset when the breaker is reset.

2.3.1 Trip Units

Except as otherwise noted, the circuit breakers, of frame sizes and the trip unit ratings as shown on the drawings, shall be provided with combination thermal and instantaneous magnetic or solid state trip units.

The Government reserves the right to change the indicated trip ratings, within frame limits, of the trip devices at the time the shop drawings are submitted for approval. Submit outline drawings of all equipment to be furnished under this contract, together with weights and overall dimensions for approval. The breaker trip units shall be interchangeable and the instantaneous magnetic trip units shall be adjustable on frame sizes larger than 150 amperes and shall be set at approximately 10 times the continuous current ratings of the circuit breakers. Solid state trip units, where indicated, shall also have adjustable long time pick-up and delay, short time pick-up and delay, and ground fault pick-up and delay.

2.3.2 480VAC Circuit Breakers

Circuit breakers for 480VAC circuits shall be rated 600VAC, and shall be an UL listed minimum interrupting capacity of 22,000 symmetrical amperes at 600 VAC.

2.3.3 120/240VAC Circuit Breakers

Circuit breakers for 120VAC circuits shall be rated not less than 120/240 or VAC, and shall be an UL listed minimum interrupting capacity of 14,000 symmetrical amperes at 600 VAC.

2.3.4 125VDC Circuit Breakers

Circuit breakers for 125VDC circuits shall be two-pole, rated 125/250VDC or 125VDC, and shall be an UL listed minimum interrupting capacity of 22,000 symmetrical amperes at 250VDC.

2.4 CONTROL EQUIPMENT

2.4.1 Terminal Blocks

2.4.1.1 Markings

Each connected terminal must have the circuit designation or wire number marked on or near the terminal in permanent contrasting color. White or other light-colored plastic marking strips, fastened by screws to each terminal block, must be provided for control wire designations. The manufacturer's wire number and the Government's wire number must both be shown for each connected terminal on the marking strips with permanent marking fluid. The marking strips must be reversible to permit marking both sides, or two marking strips must be furnished with each block, to accommodate the two sets of wire numbers.

SECTION 26 05 00.00 26 Page 7

2.4.1.2 Control Signal Type

Provide control signal type terminal blocks of double row terminal type rated for 600 volts and 30 amps. Terminals must be plated brass with #8-32 phil-slot screws that can accept lugs with a maximum width of 0.42-inches.

2.4.1.3 Short-Circuiting Type

Provide short-circuiting type terminal blocks for all current transformer secondary leads with provisions for shorting together all leads from each current transformer without opening any circuit. Short-circuiting the terminals of only one current transformer must not short-circuit the terminals of any other current transformer.

2.4.1.4 Power Terminal Blocks

Provide power distribution blocks for branch circuits and feeders 600 volts and less, with a minimum rating of 30 amps and accommodate wire size #12 AWG and larger. Power distribution blocks must be double row type and have lugs suitable for copper conductors, must be two-pole for single-phase circuits (phase and neutral conductors, or two phase conductors), and three-pole for three-phase circuits (three phase conductors). Three-phase four-wire circuits, where used, must have a three-pole block for the phase conductors and a single-pole block for the neutral, which must be mounted next to the block for the phase conductors.

For conductors rated more than 50 amperes, screws must have hexagonal heads. Conducting parts between connected terminals must have adequate contact surface and cross-section to operate without overheating.

2.5 ESCUTCHEONS AND NAMEPLATES

a. Provide nameplates made from melamine plastic conforming to

ASTM D709.

b. Nameplates must be 0.125 inch thick, black with white center core.

Surface must be matte finish. Corners must be square. Accurately align lettering and engrave into the core. Minimum size of nameplates must be 1 inch by 2.5 inches. Lettering must be a minimum of 0.25 inch high, normal block style.

c. Plates must be fastened with black-finished or silver-finished, corrosion-resisting, round-head machine screws or approved nonadhesive metal fasteners.

d. Spare locations, such as spare breakers, must have blank nameplates installed, that can be engraved in the future.

2.6 STATION POST INSULATORS

2.6.1 General

Inspect and reuse existing post insulators and replace any found to be damaged with equipment meeting these requirements. Insulators and mounting bases required for bus support must be post type. They must conform to the requirements of NEMA C29.7 or NEMA C29.5 as applicable. Each post and base must be designed so the porcelain shells will not be subjected to eccentric loading.

SECTION 26 05 00.00 26 Page 8

2.6.2 Porcelain and Glazing

The porcelain shells must be clean, dense, homogeneous and non-porous, and must be fired to a complete and uniform vitrification, free from internal stresses, cracks, blisters, laminations, voids, foreign matter, flaws, or other defects. Ensure the surfaces, except those roughened for cement grips, are smooth and free from undue warping. The glaze must be smooth, hard, dense, continuous, and brilliant. Sand the surfaces of the porcelain shell subjected to mechanical stresses transmitted from the metal parts.

The particles forming this sanded surface must be of the size best adapted to the particular dimension and size of insulator and must form a uniform single layer, smoothly distributed and firmly vitrified to the porcelain during the firing process. No excess or loose particles must be present after firing. The sanded zones must be of uniform width and accurately located so as to properly distribute the mechanical loading, and must be completely covered by metal parts. The caps and bases of the insulators must be free from cracks, shrinks, air holes, burrs, or rough edges.

2.6.3 Metal Parts

a. The metal parts must be designed so as to transmit the mechanical stresses uniformly to the porcelain. The contours of the metal and porcelain parts must be such as to eliminate areas or points of high dielectric flux concentration. All surfaces must be smooth with no projecting points or irregularities that may cause corona.

b. Exposed metal parts must be of corrosion-resistant metal or galvanized iron or steel. All hardware, including bolts, washers, and locking devices, must be given a protective zinc coating which must be capable of meeting the tests specified in NEMA C29.1 .

2.6.4 Mounting

Mount the station post insulators on the steel support structure. The station post insulator must provide structural support for the bus.

Provide all mounting hardware and line connection hardware. Submit station post insulator mounting drawings to the Government for approval.

2.7 TRANSFORMER BUSHING CONNECTIONS

The 15 KV tubular bus conductors must be round, 2-1/2 inch IPS bare copper tubular conductor, sized to match existing, and must meet the requirements of ASTM B187/B187M.

Replace and reconnect the high voltage conductor, AWG #2, from the transformer HV bushings to the surge arrester terminals to the 115kV bus, including the install of insulator supports for the HV conductors.

2.8 BUSHING TEST TERMINAL

Install the test terminal for field dielectric tests on each transformer's high-voltage bushing and on the high-voltage neutral bushing. The test terminals must have a current rating higher than that of the rated continuous current of the transformer high voltage bushing, and must be constructed of high-conductivity copper hardware with silver-plating over the entire external surface. Size the bottom connection of the test terminal to facilitate installation on the high-voltage bushing threaded connection. The top connection of the test terminal must have a standard 4-hole NEMA pad meeting the requirements of NEMA CC1 (Annex C, Figure C-3).

SECTION 26 05 00.00 26 Page 9

2.9 TRANSFORMERS

The transformer fed from the 480VAC Power Panel in the switchyard, which feeds panelboard LC-14, shall be a single-phase 15KVA, 480/120-240V copper winding dry-type, ventilated transformer.

The transformers' temperature rise shall not exceed 80 C. The core shall be grounded and shall be made of high-grade, non-aging silicon steel with low losses and designed to prevent saturation at 10% overvoltage. The transformers shall meet all applicable industry standards and requirements as listed in IEEE C57.12.01 .

2.10 SURGE ARRESTERS

2.10.1 General

Provide new surge arresters as indicated on the contract drawings for each transformer. The surge arresters shall be of silicone-polymer construction, and be outdoor station class metal-oxide type suitable for the protection of power transformers and associated equipment from overvoltage produced by lightning and switching operations. The surge arresters shall operate under usual service conditions as defined in paragraph 4.1 of IEEE C62.11, shall be self supporting, and shall be capable of withstanding wind of 130 kilometers per hour, and 0.5g seismic acceleration in any direction, but not simultaneously. The surge arresters shall conform to the applicable provisions of IEEE C62.11, and shall meet the test requirements as included in paragraph 8 "Design Tests" of IEEE C62.11 standard. The new surge arresters must meet the phase-to-ground clearances and phase-to-phase clearances per Table 3 of IEEE 1427.

2.10.2 Ratings

Each surge arrester shall be rated for use on a three-phase 60 Hz system with voltage ratings and characteristics as specified below:

a. Maximum continuous line-to-ground operating voltage (MCOV): 70 kV

b. Duty Cycle Rating: 90 kV

c. Lightning Impulse Classifying Current: 10 kA

d. Minimum Energy Class: D

2.10.3 Mounting

Mount the arresters to the existing overhead cable support structures as indicated in the contract drawings.

2.10.4 Construction

2.10.4.1 General

The entire arrester construction shall be such as to assure permanent and continuous performance free of the influence of moisture and weather conditions. The construction of the arresters shall conform to the paragraph 9 of IEEE C62.11. The design of the arrester shall be such that a uniform potential drop will exist across each section of the arrester

SECTION 26 05 00.00 26 Page 10 regardless of any distortion of the electrostatic field due to the presence of fog, water, snow, sleet, or ice on the arrester housing, or uneven drying of the surface of the housing. No chemical action shall take place, nor shall the surge arrester show deterioration, as a result of ordinary operation of the arrester. No maintenance, upkeep, or attendance shall be necessary due to operation, other than routine inspection.

2.10.4.2 Housing

The arrester units shall be composed of a silicone-polymer construction with metal end fittings enclosing the internal parts. The silicone-polymer housed arrester shall be of a high-strength construction consisting of a fiberglass tube housing onto which the silicone sheds are vulcanized, and the metal flanged ends are integrated onto the fiberglass tube prior to the vulcanizing process. The silicone-polymer shall be hydrophobic, and resistant to ultraviolet radiation. Housing leakage distance shall conform to paragraph 9.5 of IEEE C62.11.

2.10.4.3 Line Terminal Cap

Each arrester shall be equipped with a metal line terminal cap at the line end of the arrester unit. The line terminal cap shall have the line conductor clamp terminal included as an integral part, or shall provide for attaching a separate clamp type terminal using a minimum of two attachment bolts. When a separate terminal clamp is used, all necessary hardward shall be included.

2.10.4.4 Conductor Terminals

Each arrester shall be provided with solderless clamp type terminals conforming to paragraph 9.4.1 of IEEE C62.11. The terminal and bolts, nuts, washers, and locking devices which are part of the conductor terminals or are used for attaching terminals to the equipment shall be of copper alloy. The line terminals shall have a minimum of two clamping bolts, two U-bolts, or two eye-bolts. Clamp type terminals which are dependent on a single bolt for maintaining a satisfactory contact will not be acceptable. The terminal must have a standard 4-hole NEMA pad meeting the requirements of NEMA CC1 (Annex C, Figure C-3). The width of the pad shall not be less than 50 mm and the thickness of the pad shall be at least 7 mm. Contact surfaces of copper and copper alloy line terminals shall be completely and uniformly tinned with commercially pure tin.

Necessary bolts, washers, and locking devices which are used for attaching the ground conductor to the terminal pads shall be of copper alloy.

2.10.4.5 Metal Parts

Exposed metal parts, with the exception of conductor terminals, shall be corrosion-resistant metal or galvanized iron or steel. Iron and steel parts, including bolts, washers, and locking devices, shall be given a protective zinc coating which shall be capable of meeting the tests specified in section 6 of NEMA C29.1 .

2.10.4.6 Nameplates

Each arrester shall be provided with a corrosion resistant nameplate and, when the arrester is composed of a number of units, each unit shall also have an individual nameplate. The main nameplate shall be attached to the lower arrester unit or base and shall provide the information identified in paragraph 9.1 of IEEE C62.11 .

SECTION 26 05 00.00 26 Page 11

2.10.4.7 Assembly

In assembling the arrester units and for assembling a complete arrester, all bolts shall be provided with effective lock washers or other approved locking devices to maintain bolts and nuts in place. All parts shall be properly marked and identified for ease of assembly in the field.

2.10.4.8 Grounding

Provide a #4/0 bare copper conductor for each surge arrester ground connection to the existing ground mat as indicated on the contract drawings. The conductor terminations shall be made with appropriate compression fittings for cable to terminal and cable to cable connections as required. The maximum spacing between conductor supports shall be 36-inches.

2.11 ON-LINE DISSOLVED GAS AND MOISTURE CONTENT MONITOR

2.11.1 General

Provide an on-line transformer oil dissolved gas and moisture content monitor, for mounting on the transformer vault wall adjacent to the nitrogen regulator cabinet, as indicated. The monitor shall be the Serveron model TM8, or approved equal, and include the following features:

a. Provide laboratory grade gas chromatography for the following gas measurements:

(1) Hydrogen (Accuracy +/- 5 percent or +/- 3 ppm; Range 3-3,000 ppm)

(2) Oxygen (Accuracy +/- 5 percent or +30/-0 ppm; Range 30-25,000 ppm)

(3) Methane (Accuracy +/- 5 percent or +/- 5 ppm; Range 5-7,000 ppm)

(4) Carbon Monoxide (Accuracy +/- 5 percent or +/- 5 ppm; Range 5-10,000 ppm)

(5) Carbon Dioxide (Accuracy +/- 5 percent or +/- 5 ppm; Range 5-30,000 ppm)

(6) Ethylene (Accuracy +/- 5 percent or +/- 3 ppm; Range 3-5,000 ppm)

(7) Ethane (Accuracy +/- 5 percent or +/- 5 ppm; Range 5-5,000 ppm)

(8) Acetylene (Accuracy +/- 5 percent or +/- 1 ppm; Range 1-3,000 ppm)

(9) Nitrogen (Accuracy +/- 10 percent or +/- 5,000 ppm; Range 5,000-100,000 ppm)

b. Provide total dissolved combustible gas (TDCG) and total hydrocarbon (THC) measurements.

c. Provide automatic self-verification and self-calibration of all measured gases.

d. Pump the transformer oil continuously from the transformer, extract the gas from the oil with a passive membrane system utilizing Method C of ASTM D3612-02, or equivalent, and return the oil back into the transformer without de-gassing or otherwise altering the gas levels in

SECTION 26 05 00.00 26 Page 12 the oil.

e. Provide oil temperature measurements, moisture-in-oil measurements, and correlate the measurements with the transformer load and ambient temperature.

f. Have the ability to create caution and limit alarm set points as well as rate-of -change alarm values remotely from the monitor. Alarm relay contacts shall operate as either normally-open or normally-closed.

2.11.2 Communication and Data

The monitor shall be equipped with the following communication features:

a. Front panel day/night display and visual alarm/status lights.

b. Physical layer interfaces for RS-232, RS-485 and Ethernet communications.

c. Three 4-20 mA inputs and one RS-232 port available for connection to external devices.

d. Modbus RTU and DNP3 protocol support.

e. Include a PC based software package to provide remote analysis of data.

2.11.3 Accessories

Provide the following manufacturer's optional accessories with the monitor:

a. Transformer loadguide, with clamp-on current transformer for sensing load from the secondaries of the transformer bushing current transformers.

b. Ambient temperature sensor.

c. Moisture-in-oil and oil temperature sensors.

d. Internal display.

e. All required 1/4-inch Grade 316 stainless steel oil tubing (0.035 wall thickness), and associated fittings.

f. Helium cylinder (99.9995 percent purity).

g. Fiber optic interface.

h. Heat trace on oil tubing between the monitor and the transfomer valve connections.

2.12 NEUTRAL CURRENT TRANSFORMERS

Provide a new neutral current transformer for each transformer with 600:5A ratio, C400, 150kV BIL Rating designed for outdoor applications and mounting to support structure as indicated on the contract drawings.

SECTION 26 05 00.00 26 Page 13

2.13 SWITCHYARD TOWER LIGHTS

Remove existing and provide new switchyard tower lighting as shown on the contract drawings. Remove and dispose of floodlights at the top of the switchyard towers. The floodlights will not be replaced. Tower lights shall be 120V, 35W LEDs, with a color temperature of 5300K.

2.14 MOD SWITCH OPERATOR'S GROUNDING PLATFORM

Remove existing and provide new switchyard MOD operator's grounding platforms as shown on the contract drawings. New grounding platforms shall be 4 feet wide and 8 feet long. Ground platform as recommended in IEEE 80 .

2.15 SPARE PARTS

Provide the following spare parts that are duplicates of the original parts furnished and interchangeable therewith. The spare parts must be packaged for long term protection and storage according to the manufacturer's instructions. The packaging must be legibly labeled to identify the spare parts. A list of the furnished spare parts must be included in the Operation and Maintenance Manual.

a. One spare molded case circuit breaker of each type used.

b. One control relay of each type used.

c. One multi-position terminal block of each type used.

c. Ten terminal blocks of each single-position type used.

d. Two insulators of each type used.

e. One surge arrester.

PART 3 EXECUTION

3.1 DEMOLITION, INSTALLATION, AND RECONFIGURATION

3.1.1 Demolition

a. General: Disconnect and remove the 3 existing three-phase transformers, bushings, insulating oil, and all other ancillary equipment as detailed in these specifications. Drain all oil from transformers, remove all bushings, and seal all openings before moving offsite. Ship all transformers intact to an offsite facility for disassembly.

b. Existing Transformer Removal Procedure: Submit a detailed existing transformer removal and movement procedure for approval, not later than 120 days prior to the start of work on-site. The procedure must provide for safe conduct of the work, careful removal and disposition of materials, and protection of property which is to remain undisturbed or remain the property of the Government. The procedure must include a detailed description of the methods and equipment to be used for each operation, the sequence of operations, and the methods used to drain the insulating oil from the transformers. Removal of the equipment must not begin prior to approval of the removal procedure.

The plan must include, as a minimum, the following:

SECTION 26 05 00.00 26 Page 14

1) The dates on which transformer movement will be performed.

2) The method and means to drain the transformer oil and properly dispose of it, including storage, transport containers, and oil spill containment. Use of existing Government drain piping and tanks will not be allowed.

3) The method and means of moving the transformers from the switchyard and trucking them offsite.

4) Drawings showing the intended route to be taken by the transformers and trucks.

c. Disposal of Transformers: Remove and dispose of the existing transformers located in the switchyard as indicated. Use shipping manifests for drained transformer oil for the tracking of the disposal of transformer oil, and submit per the requirements of SECTION 01 33 00.

d. Transformer Ancillary Equipment Removal: The transformer ancillary electrical equipment to be removed must include but not necessarily be limited to the following. All removed ancillary equipment must become the property of the Contractor unless otherwise indicated.

1) All external control, annunciation, and relay wiring and cabling between the transformer and the powerhouse equipment.

2) Transformer neutral current transformer, and associated wiring and cabling.

3) 440V Power Cabinet, and 120V cabinets LC14 and LC15, and associated wiring and cabling.

4) Transformer nitrogen regulator cabinet, and associated wire and cabling.

5) Surge arresters.

3.1.2 Installation

Note that the moving the new transformers to their final operating location on the new foundations within the switchyard, assembly, and testing will be performed by the transformer supply contractor. Provide all materials and labor required for the installation of the Government provided transformers and ancillary equipment as defined in the contract drawings, including but not limited to:

a. Provide new oil containment and foundation for each transformer including neutral CT support structure as indicated in the contract drawings.

b. Coordinate with the transformer supply contractor for the movement of each transformer to its final location on the new foundations.

c. Anchoring the transformers with approved anchoring system. Seismic anchorage for the transformer must be installed as per the approved transformer anchorage system (see section 13 48 00.00 26, SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT). Anchors of the

SECTION 26 05 00.00 26 Page 15 system must be installed in sound and un-cracked concrete.

d. Installation of all copper tubular bus, supports, insulators, potential transformers, current transformers, enclosures, bare copper conductors, and connecting to the low-voltage bushing terminals on the transformer as indicated on the contract drawings.

e. Installation of the new high-voltage conductors, including insulators, surge arresters, high-voltage bushing test terminals, and connecting to the high-voltage bushing terminals on the transformer as indicated on the contract drawings.

f. New ground connections from each transformer to the existing switchyard ground mat.

g. 480VAC, 125VDC power, controls, annunciation, and instrumentation cables between the new transformer control cabinets and associated powerhouse equipment.

h. All external conduit connections between each transformer control and power cabinets and the existing embedded conduit in the new transformer foundations.

i. Preparation of shop drawings or as-built drawings showing modifications to the existing plant, including terminal block placement in existing cabinets and switchboards. Drawings must comply with section 01 78 00, and must include all applicable device designations, wire and cable designations, and dimensions.

j. Preparation of shop drawings or as-built drawings showing installation of new equipment, including the 15kV tubular bus system, transformer installation details showing all primary, surge suppression, secondary, neutral, and control and instrumentation connections, as well as final dimensions and clearances of installed equipment to existing walls and contraction joints. Assembly and Detail Drawings must comply with section 01 78 00, and must include all applicable device designations, wire and cable designations, and dimensions.

Installation shall comply with the applicable requirements of IEEE C2 and

NFPA 70

3.2 SEISMIC REQUIREMENTS

The structural design calculations for seismic restraints and detail drawings for electrical conduit and equipment in this section must be developed by the Contractor in accordance with the requirements of Section

13 48 00.00 26 , SEISMIC RESTRAINT FOR MECHANICAL AND ELECTRICAL EQUIPMENT.

3.3 ON-LINE DISSOLVED GAS AND MOISTURE CONTENT MONITOR MOUNTING AND

INTERCONNECTION

The on-line dissolved gas and moisture content monitor shall be installed during the transformer site reassembly process utilizing turnkey installation services by the specific equipment manufacturer.

Install the gas monitoring system equipment per the manfacturer's recommendations on the transformer vault wall as indicated, to include the following:

SECTION 26 05 00.00 26 Page 16

a. Mount the monitor and helium cylinder to the transformer vault wall adjacent to the nitrogen regulator cabinet, as indicated.

b. Provide all stainless steel oil tubing, fittings and hardware for interconnection of the monitor to the two 2-inch…