AMENDMENT0002.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

See page 2.

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY 04-Apr-2018

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 W9127S18R0004

X 9B. DATED (SEE ITEM 11)

01-Mar-2018

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 is extended, X 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

04-Apr-2018

CODE

CONTRACTING DIVISION

USACE, LITTLE ROCK (W9127S)

700 W. CAPITOL AVE, RM 7315

LITTLE ROCK AR 72201-3225

W9127S 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W9127S18R0004

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE (SF 30)

The following have been added by full text:

AMENDMENT 0002

The purpose of this amendment is to answer questions submitted to ProjNet and make the following changes to the Specifications:

Section 01 22 00, Page 68 - Removed paragraph 1.3.8

Section 26 13 13.00 26, page 263, paragraph 2.1.4 , a. - Change 3rd sentence to read, "Nameplates shall be made of laminated sheet plastic or of anodized aluminum, approximately 1/8 inch thick, engraved to provide black letters on a white background."

Section 26 13 13.01 26, page 287 - DELETE entire Section.

(End of Summary of Changes)

SECTION 01 22 00

MEASUREMENT AND PAYMENT

PART 1 GENERAL

In each instance, the contract price for an item shall constitute full compensation for furnishing all plant, labor, equipment, and materials, and for performing all operations required to remove, dispose of existing equipment and providing new equipment and to complete the work included in the item as herein specified, or as otherwise approved.

1.1 RETAINAGE OF PAYMENT

Retainage in the amount of at least 10% of present contract value will be withheld until the final submittals for Final Operation and Maintenance Manuals and Parts Catalogs, Final Approved Versions of Contractor Prepared Drawings and AS-BUILT CONTRACT DRAWINGS AND FIO DRAWINGS have been approved by the Government. See SECTION 01 78 23.00 27 for additional information.

1.2 MEASUREMENT

1.2.1 Unit Definitions

1.2.1.1 Lump Sum (LS)

Items measured as a Lump Sum will be measured for payment as a completed job, in place, and in the locations indicated. This measurement includes all incidental work and materials that are necessary to make a complete job. Unless the payment paragraph makes a specific exception of an item, incidental items will not be measured under another item, even though there is another listing for the work or material.

1.3 PAYMENT FOR BASE ITEMS

Payment for all work specified, shown or incidental to complete the work will be made as follows:

1.3.1 ITEM 0001 Mobilization And Demobilization

Payment for Bid Item 0001 will be made at the lump sum price. Payment shall include all labor, material and equipment required for; mobilizing and demobilizing all plant, equipment, fuel, supplies, materials, and personnel to and from the job site and includes all options exercised by the Government. The Contractor shall be required to submit a schedule of mobilization and demobilization costs prior to submitting the first request for payment. Mobilization shall be considered complete after all of the Contractor's equipment and site personnel have arrived and equipment has been set up to accomplish the work. Demobilization shall be considered complete after all of the Contractor's equipment and site personnel have been removed from the site and when all work has been completed.

1.3.2 ITEM 0002 Furnish New 15kV Switchgear for Units 5 and 6

Payment for Bid Item 0002 will be made per each unit's switchgear

SECTION 01 22 00 Page 1

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam Baxter County, Arkansas Solicitation No. W9127S18R0004

AMENDMENT 0002 TO SOLICITATION W9127S18R0004 on 04/02/2018 section. Payment shall include all labor, material and equipment required to design, fabricate, test, deliver FOB Bull Shoals new 15kV Switchgear and new generator and transformer bus transition sections for Units 5 and 6.

1.3.3 ITEM 0003 Replace 15kV Switchgear for Units 5 and 6

Payment for Bid Item 0003 will be made per installation for each unit's switchgear. Payment shall include all labor, material and equipment required to remove the existing switchgear assemblies including all external power and control cables and raceways, to install New 15kV Switchgear including all external power and control cables and raceways, removing portion of the existing metal enclosed buses to the generator and transformers, installing new bus transition sections, performing all testing for Units 5 and 6 to make a fully operational system.

1.3.4 ITEM 0004 Furnish Spare Parts and accessories

Payment for Bid Item 0004 will be made at the lump sum price. Payment shall include all labor, material and equipment required to deliver spare parts and accessories for new switchgear FOB Bull Shoals Powerhouse.

1.3.5 ITEM 0005 Training

Payment for Bid Item 0005 will be made at the lump sum price. Payment shall include labor, material and equipment required to provide onsite Training.

1.3.6 ITEM 0006A Furnish New 15kV Switchgear for Units 7 and 8 (OPTIONAL)

Payment for Bid Item 0006A will be made per each unit's switchgear assembly. Payment shall include all labor, material and equipment required to design, fabricate, test, deliver FOB Bull Shoals new 15kV Switchgear and new generator and transformer bus transition sections for Units 7 and

8.(OPTIONAL).

1.3.7 ITEM 0006B Replace 15kV Switchgear for Units 7 and 8 (OPTIONAL)

Payment for Bid Item 0006B will be made per installation for each unit's switchgear. Payment shall include all labor, material and equipment required to remove the existing switchgear assemblies including all external power and control cables and raceways, to install New 15kV Switchgear including all external power and control cables and raceways, removing portion of the existing metal enclosed buses to the generator and transformers, installing new bus transition sections, performing all testing for Units 7 and 8 to make a fully operational system. (OPTIONAL).

1.3.8 (AM002)DELETED

PART 2 PRODUCTS (Not Applicable)

PART 3 EXECUTION (Not Applicable)

-- End of Section --

SECTION 01 22 00 Page 2

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

AMENDMENT 0002 TO SOLICITATION W9127S18R0004 on 04/02/2018

SECTION 26 13 13.00 26

METAL CLAD SWITCHGEAR

PART 1 GENERAL

1.1 GENERAL INFORMATION

These specifications include the design, fabrication, assembly, wiring, delivery,installation and the testing and commissioning of new 15 KV switchgear and bus transition housings for units 5 through 8 at the Bull Shoals Powerhouse. Units 7 and 8 are optional items contingent on funding. The requirements of this section shall be coordinated with SECTIONS 26 08 01.00 26, 26 05 19.00 26, and 13 48 00.00 26 where referenced or required to provide complete operation switchgear assemblies at the powerhouse. The Contractor shall perform the work, but not limited to, the list below:

1. Remove and replace the existing 15kV switchgear for units 5 through 8 with new 15 kV switchgear at approximately its current location. The new switchgear shall include all equipment required to satisfy these specifications and contract drawings. Units 7 and 8 are optional based on availability of funding.

2. Bus transition sections shall be designed, furnished and installed to reconnect the new switchgear to existing 15 kV generator and transformer metal enclosed buses. The bus transitions for units switchgear shall be provided in conjunction with the Government exercising the option for new switchgear.

3. All external power and control cables and conductors shall be replaced as part of the installation as shown on the drawings and as required in Section 26 05 19.00 26. The existing conduits into the existing switchgear shall be modified to reconnect to the new switchgear as required in Section 26 00 00.00 26. The replacement of the cable for units 7 & 8 switchgear shall be performed in conjunction with the Government exercising of the option for new switchgear.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

ASME INTERNATIONAL (ASME)

ASME B1.1 (2003; R 2008) Unified Inch Screw Threads (UN and UNR Thread Form)

ASME B1.20.1 (2013) Pipe Threads, General Purpose (Inch)

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2015) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

SECTION 26 13 13.00 26 Page 1

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

AMENDMENT 0002 TO SOLICITATION W9127S18R0004 ON 04/02/2018

ASTM A153/A153M (2009) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM B187/B187M (2011) Standard Specification for Copper, Bus Bar, Rod and Shapes and General Purpose Rod, Bar and Shapes

INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)

IEC 62271-200 (2011) AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1 kV and Up To and Including 52 kV

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C37.04 (1999; R 2006; AMD 1 2003; R 2006; ERTA

2005; R 2006; AMD 2 2008; CORR 2009; INT

2010) Standard for Rating Structure for AC High-Voltage Circuit Breakers

IEEE C37.20.2 (1999; Corr 2000; R 2005) Standard for Metal-Clad Switchgear

IEEE C37.06 (2009) Standard for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Preferred Ratings and Related Required Capabilities for Voltage Above 1000 V

IEEE C37.013 (1997;R 2008)IEEE Standard For AC High-Voltage Generator Circuit Breakers Rated on a Symmetrical Current Basis

IEEE C37.09 (1999; R 2007) Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

IEEE C37.010

(1999; R 2005; Application Guide for AC

High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

IEEE C37.011 (2011) Guide for the Application of Transient Recovery Voltage for AC High-Voltage Circuit Breakers

IEEE C37.12 (2008) Guide for Specifications of High-Voltage Circuit Breakers (over 1000 Volts)

IEEE C37.100 (1992; R 2001) Standard Definitions for Power Switchgear

IEEE C57.13 (2008; INT 2009) Standard Requirements for Instrument Transformers

IEEE C62.11 (2012) Standard for Metal-Oxide Surge

SECTION 26 13 13.00 26 Page 2

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

Arresters for Alternating Current Power Circuits (>1kV)

IEEE Std. 1248 (1998 R2007) Guide for Commissioning of Electrical Systems in Hydroelectric Power Plants

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2013) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA C37.55 (2002; R 2010) Switchgear-Medium Voltage Metal-Clad Assemblies- Conformance Test Procedures

NEMA ICS 1 (2000; R 2008; E 2010) Standard for Industrial Control and Systems: General Requirements

NEMA ICS 2 (2000; R 2005; Errata 2008) Standard for Controllers, Contactors, and Overload Relays Rated 600 V

NEMA MG 1 (2014) Motors and Generators

NEMA SG 4 (2009) Alternating-Current High-Voltage Circuit Breaker

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2014; AMD 1 2013; Errata 1 2013; AMD 2 2013; Errata 2 2013; AMD 3 2014; Errata 3-4 2014; AMD 4-6 2014) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 44 (2014; Reprint Feb 2015) Thermoset-Insulated Wires and Cables

UL 489 (2013; Reprint Mar 2014) Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures

UL 1581 (2001; Reprint June 2015) Electrical Wires, Cables, and Flexible Cords

1.3 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" or "I" designation identifies the office that will review the submittal for the Government. The following shall be submitted in accordance with SECTION 01 33 00 SUBMITTAL PROCEDURES:

SECTION 26 13 13.00 26 Page 3

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

SD-01 Preconstruction Submittals

Submit no less than 60 days prior to work.

Qualifications of Field Engineering Service Personnel; G, HDC

Contractor Furnished Training of Government Personnel; G, HDC

Construction Progress Schedule; G, HDC

Removal and Installation Plan; G, HDC

SD-02 Shop Drawings

Submit within 90 calendar days after notice to proceed.

Outline Drawings; G, HDC

Assembly and Detail Drawings; G, HDC

NEW 15 KV BUS TRANSITION SECTIONS; G, HDC

Schematic Diagrams and Connection Diagrams; G, HDC

Submit within 30 calendar days after completion of work.

As-Built Drawings; G, HDC

SD-03 Product Data

Submit within than 90 calendar days after receipt of notice to proceed.

Switchgear Product Data Package; G, HDC

SD-07 Certificates

Submit within 30 calendar days after receipt of Notice to Proceed.

Design Tests; G, HDC

Submit within 90 days after receipt of Notice to Proceed.

Seismic equipment certification and equipment anchorage shall be as per SECTION 13 48 00.00 26; G, HDC

SD-09 Manufacturer's Field Reports

Submit no later than 30 calendar days prior to factory testing.

Test Record Forms; G, HDC

Submit within 14 calendar days after completion of factory tests.

Factory Test Reports; G, HDC

Submit not later than 30 calendar days prior to field tests.

Test Plan Procedure; G, HDC

SECTION 26 13 13.00 26 Page 4

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

Submit within 14 calendar days after completion of field tests.

Field Test Reports; G, HDC

SD-10 Operation and Maintenance Data

Submit no later than 30 calendar days prior to the first field acceptance test

Operation and Maintenance Manual; G, HDC

Submit 3 draft copies. Submittals shall be made in accordance with all applicable procedures for submittals of drawings, except as provided herein. The Contracting Officer will return one draft copy with appropriate approval of, or comment on, the acceptability of the submittal. The Contractor shall resubmit the one draft copy with such corrected and/or additional data sheets and drawings shall be furnished also for the two draft copies retained by the Contracting Officer. Upon final approval of the draft, the Contractor shall submit five additional copies for a total of eight to the Contracting Officer. The copies shall be furnished no later than the date specified for delivery of equipment. Manuals shall address all equipment provided and installed by the Contractor under this contract.

1.4 GENERAL REQUIREMENTS

1.4.1 General

The Contractor shall design the new switchgear and bus transition sections as a system to ensure the equipment will interface with each other and the existing bus. The switchgear and bus shall be supplied and manufactured by the same manufacturer.

1.4.2 Delivery, Storage, And Handling

The equipment shall be shipped as completely assembled and wired as feasible so as to require a minimum of installation work. Each shipping section shall be properly match marked to facilitate reassembly, and shall be provided with removable lifting channels with eye bolts for attachment of crane slings to facilitate lifting and handling. Any relay or other device which cannot withstand the hazards of shipment when mounted in place on the equipment shall be carefully packed and shipped separately.

These devices shall be marked with the number of the panel which they are to be mounted on and fully identified. All finished painted surfaces and metal work shall be wrapped suitably or otherwise protected from damage during shipment. All parts shall be prepared for shipment so that slings for handling may be attached readily while the parts are in a railway car or transport truck. All spare parts and accessories shall be carefully packaged and clearly marked.

1.5 QUALIFICATIONS

Each manufacturer shall have a minimum of five (5) years experience with the design, manufacture, and testing of equipment of the same type and rating.

SECTION 26 13 13.00 26 Page 5

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 General

a. The equipment furnished and the work performed under this contract shall be in conformance with the applicable provisions of ANSI and IEEE standards; IEEE C37.06 , NEMA C37.55 , IEEE C37.04 ,, IEEE C37.09 , IEEE C37.010 , IEEE C37.013 and IEEE C37.20.2 . The Contractor shall furnish documentation substantiating that the 15kV switchgear and circuit breaker design and assembly are ANSI certified.

b. All materials, components, and equipment shall conform to the requirements of these specifications. Materials, components, and equipment shall be new, free from defects and imperfections, of recent manufacture, and shall have mechanical and electrical properties suitable for the intended use. Breakers and switchgear shall be from the same manufacturer. All other materials, components, and equipment not manufactured by the Contractor shall be products of other recognized reputable manufacturers. When practicable, devices and equipment used for the same or similar services shall be of the same make and type, and shall be interchangeable when of the same rating.

c. The switchgear will be located indoors within ambient temperature extremes of 0 degrees C to +40 degrees C. The switchgear will be installed at an altitude below 3,300 feet.

2.1.2 Device Arrangement

The preferred arrangement of the switchgear panels is indicated on the contract drawings. Any proposed deviation from this arrangement shall be submitted to the Contracting Officer for approval. The design of the switchgear and arrangement of devices shall be such that adequate space is provided for inspection and maintenance of wiring, terminals, and devices. Equipment on the rear of the panels shall be so mounted that the studs of the equipment mounted on the front of the panels will be accessible without removing any device.

2.1.3 Connections

All bolts, studs, machine screws, nuts and tapped holes shall be in accordance with ASME B1.1 . Threads for sizes 1/4 inch to 1 inch, inclusive, shall be NC or UNC series. The sizes and threads of all fittings and connecting equipment shall be in accordance with ASME B1.20.1 .

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

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

All connections shall be electrically compatible corrosion-resisting materials that are stainless steel, copper, brass, bronze, or copper-nickel-copper alloys.

2.1.4 NAMEPLATES

a. Whether specifically stated or not, each item of equipment, mounted on or in the equipment, which does not have a suitable designation included as an integral part of the device shall be provided with an engraved nameplate. Where the manufacturer's standard device designations are

SECTION 26 13 13.00 26 Page 6

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam different from the device designations shown on the Government schematic diagrams and device legends, the Government device designation shall also be marked on or adjacent to each device. Nameplates shall be made of laminated sheet plastic or of anodized aluminum, approximately 1/8 inch thick, engraved to provide (Amend 002) black letters on a (Amend 002) white background. The nameplates shall be fastened to the panels in proper positions with corrosion resistant round head screws or rivets.

b. Each door or panel shall be provided with an identifying nameplate approximately 1 inch by 3 inch in size. A master nameplate approximately 3 inch by 5 inch in size shall also be provided for each complete switchgear assembly. Nameplate designations shall be in accordance with the approved drawings.

c. Each terminal of each device shall be marked to corresponds with the terminal marking shown on the Contractor's wiring diagrams. The device and terminal markings shall be of permanent legible printed form in a color which contrasts with the color of the device or panel and shall not be obscured by wires or other devices.

2.1.5 Equipment Product Data

Submit a Switchgear Product Data Package to include a complete description of the the products to be used in the switchgear to demonstrate compliance with the specification requirements. Include manufacturer's data, drawings, catalog cuts, and wiring diagrams as required. Data sheets shall be color copies of the original documents and be of good quality, easily read and marked or highlighted to indicate what is being provided.

Submittal shall be include tabs, dividers and identifying labels to clearly indicate what is being provided and the purpose to which it is to be used. Submittal shall include as a minimum the following equipment below.

a. 15 KV Circuit Breakers

b. Switchgear Cubicles.

c. Bus Transition Sections.

d. Instrument Transformers.

e. Fuses and Fuse Blocks

f. Molded Case Circuit Breakers.

g. Terminal Blocks.

h. Surge Arresters and Capacitors.

i. Nameplates.

j. Control Relays, Control Switches and indicating lamps.

k. Wire.

l. Bus Insulation System.

m. Infra-red (IR) viewing windows.

SECTION 26 13 13.00 26 Page 7

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

n. Relay Curves for Instrument Transformers

o. Accessories and Spare Parts.

2.2 15 kV SWITCHGEAR AND CIRCUIT BREAKER

2.2.1 General

a. Except as otherwise specified, the circuit breakers shall conform to the applicable requirements of ANSI and/or IEEE Standards; IEEE C37.010 , IEEE C37.04 , IEEE C37.013 , IEEE C37.06 , IEEE C37.09 , IEEE C37.20.2 , NEMA C37.55 , and IEEE C37.100 . The Contractor shall provide documentation substantiating that the circuit breaker design and assemblies are certified. The full-load temperature rise shall not exceed the limits established in IEEE C37.20.2 . The circuit breakers shall be rated on a symmetrical current basis as defined in IEEE C37.013 .

b. The new 15 kV circuit breakers and switchgear, shall be fully operable by all required controls as shown on the contract drawings. The switchgear shall be drawout breaker cubicle type. The switchgear, shall be designed for operation on a 15 kV, 3-phase, 3-wire, high impedance grounded, 60 Hz system.

2.2.2 15 kV Breaker

2.2.2.1 Rating

The removable element of each switchgear unit shall be circuit breaker with three individual vacuum interrupter type poles, with an operating mechanism, primary and secondary disconnecting devices, auxiliary switches, operation counter, position indicator, and control wiring, all mounted on a rugged frame with wheels suitable for moving the element for indoor 60-Hz service. The circuit breakers shall be rated on a symmetrical current basis and shall have characteristics in accordance with Table 1 of IEEE C37.013 and as follows:

a. Rated Maximum Voltage, kV,rms 15kV

b. Rated Continuous Current, Amps,rms 3000A

c. Rated Interrupting Time, cycles 3 cycles

d. Rated Short-Circuit Current at Rated Max kA 50 kA

e. Closing and Latching Capability 137 kA peak

f. Impulse withstand Voltage, full wave,kV (BIL) 95 kV

2.2.2.2 Removable Elements

a. The racking mechanism shall allow removing the breaker from the drawout switchgear to the disconnected or test position. All contacts shall be silver-plated and shall have ample area and spring pressure.

Contact parts which carry current shall not be used to supply contact-spring pressures. When the circuit breakers are withdrawn to the disconnect position, the circuit breaker bushing shall be withdrawn completely from the fixed contact enclosure and automatic shutters shall close the openings to prevent accidental contact with live terminals. When the circuit breaker is in the disconnect or test

SECTION 26 13 13.00 26 Page 8

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam position, it shall be operable from local control sources by use of the set of control jumpers to be furnished with the accessories, or by other approved means, but shall not be operable from remote control stations.

b. Each pole shall be an individual and independent factory assembled and sealed vacuum type interrupter with the contacts protected from moisture and contaminated atmosphere. The three poles and auxiliary devices of each circuit breaker shall be operated simultaneously by a single operating mechanism from a common shaft. The operating system capacity shall be sufficient to perform repeated operating cycles, using a combination of initial stored energy and recharged stored energy, as required below, without mis-operation, thermal damage or mechanical damage. The circuit breaker, operating mechanism and control design shall permit any close or trip switches to remain closed for any length of time without causing damage.

b. The vacuum interrupters shall require no interior maintenance or repairs. The interrupters shall be equipped with arc-extinguishing devices to quench the arc after current zero and shall provide a minimum of 2,000 no load operations before replacement is needed. The interrupter shall have ready means of measuring contact wear. The contacts shall be factory set to allow for wear so that the contacts on all phases will open and close simultaneously

c. The interrupter shall have provisions for locking the interrupter into the open position for maintenance purposes.

2.2.2.3 Interlocks

Mechanical interlocks shall be in accordance with IEEE C37.09 requirements and as follows:

a. Mechanical interlocks shall prevent moving the removable elements to or from the connected position when the switching device is in the closed position, and prevent closing the switching device unless the primary disconnection devices are in full contact or are separated by a safe distance.

b. The removable element shall be positively held in place within the housing when it is in either the connected or test position.

c. When a separate disconnected position is provided with the door closed, the removable element shall be positively held in this position. The circuit breaker shall not be operable while the removable element is at any point between test and operating position.

d. The stored energy element shall not release unless the mechanism has been fully charged and it shall be automatically discharged before the circuit breaker is withdrawn from the housing.

2.2.2.4 Rated Transient Recovery Voltage

Each circuit breaker shall meet the related required transient voltage withstand capabilities as described by IEEE C37.04 paragraph 5.9.1.1 and

IEEE C37.011 .

SECTION 26 13 13.00 26 Page 9

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

2.2.2.5 Load Switching Capacity and Life

Required load switching capability and life shall be in accordance with IEEE C37.04 paragraph 5.8.2.3 and with the following:

a. Each breaker shall be capable of performing without maintenance or adjustment, 1,000 no-load operations as prescribed in Column 4 of Table 7 per IEEE C37.06 during time periods (between scheduled breaker maintenance) of up to 10 years, when operated under the specified service conditions.

b. Each breaker shall be capable of interrupting without maintenance, at least 500 close-open (CO) operations under full load conditions as prescribed in Column 6 of Table 7 per IEEE C37.06 .

c. Each breaker shall be capable of performing without maintenance, three close-open (CO) operations at full rated interrupting currents.

Procedures and test duties shall be in accordance with IEEE C37.013 paragraph 5.8.2.5.

2.2.2.6 Rated Control Voltage

Rated control voltage ranges shall be 90-140 volts dc for the close control circuit, and 70-140 volts dc for the trip control circuit in accordance with IEEE C37.06 Table 8. Further, operation of the closing and tripping control circuits shall not produce transient overvoltage exceeding 1,500 volts crest.

2.2.2.7 Operating Mechanism

The circuit breakers shall be designed for normal operation by means of a motor-spring type, stored-energy closing operator with trip coil and shall also be provided with manual maintenance closing, and emergency tripping devices. Charging motor shall normally charge the spring, but manually charging feature shall also be provided. Manual maintenance closing shall include a slow closing feature. The mechanism shall be removable without disturbing the alignment or adjustment of current-carrying parts of the circuit breakers. Each mechanism shall operate a position indicator which shall give positive indication of the contact position, whether closed or open. Each circuit breaker shall be equipped with an operation counter, auxiliary switch assembly, and MOC assembly providing as a minimum the contacts shown on the drawings and those required for breaker control.

Cubicle cell switches shall be provided as shown on the drawing and as required for internal control. Existing cell switches shall be field verified and duplicated. Breaker closing time, when the breaker is operated from a control switch at rated control voltage, shall not exceed 15 cycles. The circuit breaker closing mechanism shall be so arranged that the closing speed of the contacts is independent of the control voltage, and MOC mechanism.

2.2.2.8 General Operating Requirements

The operating mechanism shall be designed to provide continuous operating force through the entire range of motion, in either breaker close or open direction. The mechanism shall be designed and manufactured to withstand all operating stresses. Bearings, pins, bolts, nuts and other connections shall be locked and pinned in a manner to prevent loosening or change of adjustment. The operating mechanism shall not require critical adjustments, and failure of any spring (other than the operating energy

SECTION 26 13 13.00 26 Page 10

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam storage spring, where applicable) shall not prevent tripping nor cause tripping or closing of the circuit breaker. The mechanism shall contain a shock absorber system to dampen the opening force of the circuit breaker.

The shock absorber shall have sufficient resilience to prevent contact bounce that could cause a re-strike of the main contacts during the opening of the circuit breaker or during a spring discharge. The shock absorber shall have a design life of 10,000 breaker opening and closing cycles without the need for repair, replacement or adjustment.

2.2.2.9 Operating Capacity

The operating mechanism shall perform repeated operating cycles using a combination of initial stored energy and recharged stored energy as required below, without mis-operation or thermal or mechanical damage.

The operating mechanism shall be capable of performing the following operating sequences without thermal or mechanical damage, while the circuit breaker is operating at rated short circuit current and related required capabilities:

a. The standard ANSI duty cycle of Open, 15 seconds, Close-Open, 3 min, Close-Open. This is usually abbreviated in literature as CO-15s-CO, where C is a Closing operation and O is an Opening operation. Duty cycle is addressed by IEEE C37.04 . The duty cycle shown indicates that the circuit breaker shall be capable of performing a Close-Open operation and repeating it after 15 seconds under short circuit conditions without degradation of performance.

b. Each motor-charged spring operated mechanism shall meet the duty cycle of Open-Close-Open, 30 seconds, Close-Open. At least 5 successive Close-Open operations shall be possible without overloading the spring charging motor. The mechanism shall have provisions for manually charging the springs.

2.2.2.10 Energy Supply and Storage Means

The spring charging system, including motor, and the operating mechanism shall be located on the roll out breaker. A suitable means shall be provided to prevent operation of the mechanism when maintenance work is being done.

a. The motors for spring charging shall be nominal 125-volt DC designed for across-the-line starting and suitable for operation through a range of 90 to 140-volts DC. Each motor shall either be capable of continually withstanding locked-rotor current without damage, or shall be provided with manually-reset thermal overload protection in each ungrounded line. The motors shall conform to the applicable provisions of NEMA MG 1 and the motor controls shall comply with the applicable provisions of NEMA ICS 1 and NEMA ICS 2 .

b. Special Requirements for Electric Motor Driven Spring Mechanisms.

The state of charge shall be clearly visible by spring position indicators. Spring charging shall occur only after a close operation.

2.2.2.11 Operating Mechanism Indicators

The following indicators shall be provided and shall be readable from one central location with the housing closed.

a. Circuit breaker position. These indicators shall give positive

SECTION 26 13 13.00 26 Page 11

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam information of the position of the contacts, whether closed, open, or in an intermediate position .

b. Operation counter. The counter shall be directly operated by the mechanism when the circuit breaker opens, and shall not be affected by cycling power to control circuits.

c. A spring charge indicator shall be provided for any springs used to store operating energy. This shall be easily readable when the housing door is open.

2.2.3 SWITCHGEAR

2.2.3.1 Configuration

The design of the switchgear and arrangement of devices shall be such that adequate space is allowed for inspection and maintenance of wiring, terminals and devices. Equipment on the rear of the panels shall be so mounted that the studs of the equipment mounted on the front of the panels will be accessible without removing any device. The standard phasing within equipment housings for AC power circuits shall be A-B-C from left to right, A-B-C from top to bottom, or A-B-C from front to back, when facing the front of the switchgear. Power and control cables in conduit and the bus transition section shall enter the switchgear from the top as shown on the contract drawings. The switchgear shall comply with the requirements of IEEE C37.20.2

2.2.3.2 Outline Drawings

Outline shall be submitted for approval to include as a minimum the drawings of all equipment to include the overall dimensions and weights of the equipment; the size and location of conduit and bus entrances;

foundations and mounting details to include bolting equipment to the floor, walls, and ceilings.

2.2.3.3 Assembly And Detail Drawings

Assembly and detailed drawings and data shall be submitted to demonstrate that all parts of the equipment will conform to the requirements and intent of the specifications. The drawings and data shall include sectional views of switchgear units, description of removable elements, all relays and other devices, equipment lists, and nameplate schedules, the proposed arrangement of terminal blocks and supports for incoming cables.

2.2.3.4 Schematic Diagrams and Connection Diagrams

Schematic diagrams shall be submitted for approval. Drawings shall include the one line diagrams of the switchgear assembly, complete assembly full line connection diagram, and control diagrams showing that the equipment will function in a way to meet the requirements and intent of the specifications and interface with existing equipment. Wiring diagrams shall be wireless diagrams showing all terminal blocks and connections between the blocks and switchgear equipment by reference to destinations and wire numbers. Space for labeling the external cables shall be provide next to the terminal blocks to indicate the external cable and conduits indicated on the drawings. Use of ladder logic with terminal point numbers is not acceptable as a wiring diagram. The wiring diagrams shall be made as seen by an observer of the actual wiring, and

SECTION 26 13 13.00 26 Page 12

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam space shall be provided for the addition of devices where mounting space exists on the structure.

2.2.3.5 Housings

The following requirements apply to new switchgear housings and enclosures as applicable.

a. Each switchgear unit shall consist of a self-supporting dead-front fabricated housing constructed of sheet metal on a rigid steel frame and provided with metal partitions or barriers as required and shall comply with IEEE C37.20.2 . The sheet metal forming the enclosure for the removable element and the barriers between major primary sections shall not be less than No. 11 MSG.

b. Exterior panel surfaces shall not be drilled for attachment of wiring or devices where such holes or fastenings will be visible from the exterior. All ferrous fasteners shall have a rust-resistant finish, and all bolts and screws shall be provided with lock washers or other approved locking devices. The hinges for all doors shall be of the fully-concealed type. Stops shall be provided where required to limit door swing and prevent damage to hinges or adjacent equipment. The clearance between any edge of a hinged door, when closed, and the adjacent panel shall be uniform and shall not exceed 1/8-inch. Each door shall be supplied with a 2-point vault type latch with handles of the key-locking type with identical keying with that of other switchgear enclosures and ten keys of each type furnished.

c. Surfaces of equipment frames shall be thoroughly cleaned after fabrication by sandblasting, pickling and rinsing, or other means, and then shall receive a rust inhibitive phosphatizing coating in accordance with IEEE C37.20.2 requirements. Surfaces shall then be primed, filled where necessary, and given at least one coat of industrial enamel with semigloss finish, light gray in color, or the manufacturer's standard color. The Contractor shall furnish all paint necessary to repair any damage in the finish after the equipment has been installed.

d. Ventilating openings shall be provided as required for proper ventilation. The openings shall preferably be of the grille type, and shall be provided with corrosion-resistant insect-proof screens on the inside.

e. The housing for each removable circuit breaker element shall include a hinged front, separate three-phase bus, bus terminating compartments, a self-contained mechanism for removing the circuit breaker from switchgear, automatic shutters, and mechanical interlocks. The housing structure and the removable element shall be self-aligning and shall be designed in such a manner as to ensure a good mechanical fit between the two and to permit the circuit breaker removable elements of the same rating to be interchanged.

f. Lifting eyes shall be provided at locations suitable for lifting the entire drawout switchgear section. Suitable entrance locations shall be indicated on the Contractor's Assembly and Detail Drawings for entrance of all external control cables and bus.

g. Bus transitions sections shall be provided to connect the existing generator and transformer metal enclosed bus to the new switchgear.

SECTION 26 13 13.00 26 Page 13

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam

h. Circuit breaker cubicles shall have breaker rackout mechanisms for racking the breaker into position. The rackout mechanism will properly align the breaker for insertion into position. It will hold the breaker rigidly in the operating position. In the disconnected position, breaker shall be easily removable from compartment. Breaker racking shall be accomplished with door closed and latched through a hole in front door to operate rackout device.

i. Infra-red (IR) viewing windows shall be provided on the rear of the switchgear enclosures, minimum one window for each main bus breaker lug connection to allow IR sensing of each breaker in the closed position under load conditions without having to open the enclosure. Windows shall feature a removable steel or aluminum security cover over a 4-inch crystal sightglass. The IR windows shall be the switchgear manufacturer's standard product, or a third-party product that is UL certified and arc-flash tested to the kA rating of the breakers or higher, meeting the applicable requirements of IEC 62271-200 , and installed with the coordination and approval of the switchgear manufacturer.

Removable metal plates or bolted hinged doors at each unit housing shall be provided for access to the bus compartment.

2.2.3.6 Buses

a. General: The buses for each switchgear assembly shall be copper satisfying the applicable requirements of ASTM B187/B187M and shall have a continuous current carrying capacity not less than the circuit breaker. The buses shall have grounding ball studs for installing protective grounds.

b. Design: The buses shall have mechanical and thermal capacities coordinated with the highest momentary rating of the individual circuit breakers. Bus bars shall be of hard drawn copper.

c. Splices and Connections: All splices for field assembly shall be bolted. Where bolted connections are used, they shall be equipped with provisions for adequate clamping and contact surfaces shall be silver plated.

d. Insulation: Each phase conductor shall be completely enclosed with molded insulation that will withstand the dielectric requirements of the circuit breaker. Molded neoprene boots with nylon fasteners of equivalent mechanical and electrical strength as that enclosing the bus shall be provided at bus joints. Taped insulation shall not be used at bus joints. The buses with molded insulation shall be mounted on insulating supports, and shall pass through barriers between individual unit housings.

e. Grounding: Each switchgear assembly shall include a continuous interior copper bar ground bus to which the housing, framework, cable, bus supports, and noncurrent-carrying metallic parts of all equipment and conduits shall be grounded. Grounding shall conform to IEEE C37.20.2 , except that the bus bar shall be not less than 1/4-inch by 1-inch in size. If the operating mechanism of removable units is not permanently grounded, ground contacts shall be provided to connect the movable element automatically to the ground buses. These connections shall make before the main disconnecting devices upon

SECTION 26 13 13.00 26 Page 14

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam insertion, and break after the main disconnecting devices upon withdrawal. Splice plates and hardware shall be provided for bolted connections at shipping splits. Provisions shall be provided to bond the ground bus to the existing metal enclosed bus and the powerhouse ground grid in the field. Two ground pads shall be provided, one at each end of the switchgear with terminals complying with NEMA CC 1.

2.3 WIRING

2.3.1 Control Wire

All control wire, including wire for removable elements, shall be stranded copper switchboard wire with 600 volt insulation, type SIS as listed in NFPA 70 . The wire shall comply with the requirements of UL 44 and shall pass the VW-1 flame test of UL 1581 . Hinge wire shall have Class K stranding. Current transformer secondary leads shall be not smaller than No. 10 AWG. Minimum wire size for all other control wiring shall be No.

12 AWG. No splices shall be allowed. All terminations shall be made with indented type ring tongue terminals and each conductor shall be identified at each end with a permanently machine-embossed black identification on white plastic tubular shrink-on marker or approved equal. The wire or terminal point designations used on the Contractor's wiring diagrams and printed on terminal block marking strips may be according to the Contractor's standard practice; however, additional wire and cable designations for identification of remote or external circuits shall be required, and Schematic Diagrams and Connection Diagrams submitted for approval will be so marked and returned to the Contractor for additional designations. Drawings may require revision of external circuit connections, terminal and wire designations and wire grouping when submitted for approval.

2.3.2 Wiring Duct System

A suitable wiring duct system shall be installed for all interpanel wiring and shall provide easy access for inspection and replacement of wiring.

All wiring shall be installed in wiring channels and ducts as far as possible. Each wire shall be properly protected where it leaves a channel or duct.

2.3.3 Wiring Support

Wiring, where not installed in channels or ducts, shall be formed into compact wire bundles suitably bound together and properly supported and provisions shall be made for training and supporting incoming cables from the point of entrance to the terminal blocks. Bindings and supports shall not cause damage or cold flow of the insulation. Groups of exposed wires shall be run straight horizontally or vertically with short-radius right-angle bends. Wiring supports shall be of heavy-gage rustproof material or steel with rust-resisting finish equivalent to sherardizing or cadmium-zinc plating.

2.3.4 High-Voltage Compartment Control Wiring

Any control wiring within high-voltage compartments shall be completely shielded in a protective metal enclosure. Interpanel terminal blocks shall be used for interconnecting the wiring between adjacent panels at any shipping splits. Hinge wire shall be used between stationary panels and swinging panels and doors and shall be formed in vertical wire loops which shall provide rotation around the longitudinal axis of the

SECTION 26 13 13.00 26 Page 15

PN462976

Units 5-8 Generator Breaker Replacement Bull Shoals Dam conductors. Instrument transformer secondary circuits shall be grounded at the switchgear during shipping and handling. All leads from each individual instrument transformer shall be brought out to terminal blocks.

2.3.5 Current Transformer Secondary Leads

All current transformer secondary leads shall be routed through metal conduits separately from all other wiring, to short-circuiting terminal blocks in the control cabinet or in a separate cabinet. A secondary lead shall be provided from the polarity terminal and the non-polarity terminal of each current transformer (2 secondary leads per current transformer).

No more than one secondary lead may be placed on any terminal of a short-circuiting terminal block. Current transformer terminal blocks shall be isolated by barriers from operating mechanism and control circuits if they are in the control cabinet.

2.3.6 Terminal Blocks and External cables

All wire shall be terminated on device terminal studs or terminal blocks. All screw terminals shall have toothed lockwashers and all stud terminals shall have contact nuts and either locking nuts or lockwashers.

a. Terminal blocks shall be molded or fabricated type with barriers, rated not less than 600 volts. Modular or push-in grip type blocks are not acceptable. The terminals shall be removable and of binding, fillister, or washer-head screw type, or stud type with contact and locking nuts. Each terminal shall be not less than No. 10 in size with length and space for connecting at least 2 indented terminal connectors for No. 10 conductors to each terminal. Terminal Blocks shall meet the requirements for class 1E per IEEE Std 323.

c. Terminal blocks shall be provided to terminate all external cables.

Each group of terminal blocks shall contain at least four spare terminals or 10 percent spare terminals whichever is greater.