A22_Amendment_W912EE-17-R-0003-0002.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

Reference Solicitation No. W912EE-17-R-0003 for Ouachita River Basin, Little Missouri River, Narrow s Dam, Arkansas, The Narrow s Dam and Pow er Plant 8,888/11/111 KVA, Narrow s GSU Installation and Sw itchyard Upgrade, is amended as follow s:

Please see continuation pages for changes.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 2

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

16C. DATE SIGNED

BY 29-Mar-2017

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 W912EE-17-R-0003

X 9B. DATED (SEE ITEM 11)

02-Mar-2017

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 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

29-Mar-2017

CODE

VICKSBURG CONTRACTING OFFICE

4155 CLAY ST

VICKSBURG MS 39183-3435

W912EE 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EE-17-R-0003

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

The following items are applicable to this modification:

A new Proposal due date and time of Tuesday, 18 April 2017 at 12:00 p.m. is hereby established.

SPECIFICATIONS: Section 33 75 10.00 26 is revised and replaced.

DRAWINGS: Informational Drawings are added.

Specifications revised by this amendment have the notation "Revised by Amendment 0002" at the bottom of the page. Text added by this amendment is shown as underlined. Text deleted by this amendment is shown as overstruck.

Drawings added by this amendment have the notation “Added by Amendment 0002” at the bottom of the page.

Added By Amendment 0002

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 75 10.00 26

HIGH VOLTAGE GROUP-OPERATED CIRCUIT SWITCHER, DISCONNECT SWITCHES AND

GROUNDING SWITCHES

PART 1 GENERAL

1.1 GENERAL INFORMATION

1.2 REFERENCES

1.3 SUBMITTALS

1.4 MANUFACTURER'S QUALIFICATIONS

1.5 GENERAL REQUIREMENTS

1.5.1 Bill of Materials

1.5.2 Manufacturer's Nameplate

1.5.3 Contractor's Drawings

PART 2 PRODUCTS

2.1 OUTDOOR CIRCUIT SWITCHER, DISCONNECT, AND GROUNDING SWITCH

2.1.1 69 kV Circuit Switcher General Requirements

2.1.2 General Switch Requirements

2.1.3 Support Structure

2.1.4 Structural Design Criteria

2.1.5 Construction

2.1.6 Hardware

2.1.7 Galvanizing

2.1.8 Ratings for 69kV Disconnect Switches

2.1.9 Bases

2.1.10 Blades

2.1.11 Contacts

2.1.12 Hinge Connections

2.1.13 Terminals

2.1.14 Switch Bearings

2.1.15 Switch Insulators

2.1.16 Arcing Horns

2.1.17 Grounding Switch

2.2 OPERATING MECHANISMS

2.2.1 Construction

2.2.2 Grounding

2.2.3 Operator Bearings

2.2.4 Shafts and Linkages

2.2.5 Interlocking

2.2.6 Manual Operating Mechanisms

2.2.7 Grounding Switch Operator

2.3 SWITCH TOOLS AND ACCESSORIES

2.4 SPARE PARTS

2.5 CURRENT TRANSFORMERS

2.6 TUBULAR BUS CONNECTORS

2.7 SWITCHYARD INSULATORS

2.8 ALUMINUM TUBULAR BUS

PART 3 EXECUTION

SECTION 33 75 10.00 26 Page 1 Revised By Amendment 0002

3.1 FACTORY TESTS

3.1.1 Routine Test

3.1.2 Group-Operated Disconnect and Grounding Switch Type Tests

3.1.3 Group-Operated Disconnect and Grounding Switch Factory Tests

3.1.4 Insulator Tests

3.1.4.1 Design

3.1.4.2 Production

3.2 OPERATION AND MAINTENANCE (O&M) DATA

3.3 SERVICES OF THE DISCONNECT SWITCH MANUFACTURER'S ERECTING ENGINEERS

3.4 CONTRACTOR-FURNISHED TRAINING OF GOVERNMENT PERSONNEL

-- End of Section Table of Contents --

SECTION 33 75 10.00 26 Page 2

SECTION 33 75 10.00 26

HIGH VOLTAGE GROUP-OPERATED CIRCUIT SWITCHER, DISCONNECT SWITCHES AND

GROUNDING SWITCHES

PART 1 GENERAL

1.1 GENERAL INFORMATION

This section covers the high voltage equipment to be design and provided for the Alternate Station Service Substation as shown on the drawings. The equipment installation is shown in general and the contractor shall provide a completed installation, including final design for equipment actually furnished. This section also applies to the work in Sections 01 33 16.00 26

CONTRACTOR DESIGN AFTER AWARD; 26 00 00.00 26 GENERAL ELECTRICAL WORK AND

EQUIPMENT; 26 05 33.00 26 RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS;

26 05 13.00 26 MEDIUM AND HIGH-VOLTAGE CABLE; 26 05 19.00 26 INSULATED WIRE

AND CABLE; 26 05 26.00 26 GROUNDING; 26 08 01.00 26 SYSTEMS COMMISSIONING;

48 19 23.02 26 1,500 KVA CLASS I STATION SERVICE POWER TRANSFORMER, and 48 20 00.00 26 TRANSFORMER SHIPMENT, HAULING, AND SITE ASSEMBLY. These specifications are intended to be complimentary; where there is any conflict or confusion between them, the most stringent requirements apply.

The equipment to be provided includes a 69 kV Circuit Switcher, 69 kV Disconnect Switches, and 69 kV Current Transformers, all of which are to be installed on a contractor-designed elevated equipment platform. The new circuit switcher shall be a three pole resettable SF6 gas type. The new group-operated disconnect switches and grounding switches to be furnished under these specifications shall be three-pole, single-throw, outdoor group-operated non-load break switches, manually operated only.

Application will be outdoors in unconfined air, in a hydroelectric powerhouse substation at an altitude below 3,300 feet, within ambient temperature extremes of -30 C to +50 C, and ice conditions. The switches shall be provided complete with operating mechanisms and accessories as indicated herein. Switches shall be warranted to be free of defect in workmanship and material for at least five years from the date of acceptance or the manufacturer's warranty period, whichever is longer.

This equipment is part of the new Alternate Station Service Substation that is to be provided by the contractor in the Narrows Switchyard. This substation is to be installed and energized prior to the removal of the existing GSU Transformers or any other work that requires an outage of the 69 kV switchyard. Short outages are acceptable for the construction of the new Alternate Station Service Substation if necessary for safety. The contractor shall expedite the submittals and procurement of this equipment

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.

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7 (2010; Errata 2011; Supp 1 2013) Minimum Design Loads for Buildings and Other Structures

SECTION 33 75 10.00 26 Page 3

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

ANSI C29.1 (1988; R 2012) American National Standard for Electrical Power Insulators--Test Methods

ANSI C29.2 (2012) American National Standard for Insulators - Wet-Process Porcelain and Toughened Glass - Suspension Type

ANSI C29.9 (1983; R 2012) American National Standard for Wet-Process Porcelain Insulators - Apparatus, Post-Type

ANSI C37.32 (2002) High-Voltage Switches, Bus Supports, and Accessories - Schedules of Preferred Ratings, Construction Guidelines, and Specifications

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 A36/A36M (2014) Standard Specification for Carbon Structural Steel

ASTM A123/A123M (2013) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM B317/B317M (2007) Standard Specification for Aluminum-Alloy Extruded Bar, Rod, Tube, Pipe, and Structural Profiles for Electrical Purposes (Bus Conductor)

ASTM B98/B98M (2013) Standard Specification for Copper-Silicon Alloy Rod, Bar, and Shapes

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 693 (2005) Recommended Practice for Seismic Design of Substations

IEEE C37.30 (1997; INT 1 2011) Standard Requirements for High-Voltage Switches

IEEE C37.34 (1994) Standard Test Code for High-Voltage Air Switches

SECTION 33 75 10.00 26 Page 4

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

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

1.3 SUBMITTALS

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

submittals not having a "G" designation are for information only. When used, a designation following the "G" 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:

SD-02 Shop Drawings

Bill of Materials

Outline Drawings; G HDC

Mounting Details; G HDC

Schematic Diagrams; G HDC

Wiring Diagrams; G HDC

Manufacturer's Nameplate

SD-03 Product Data

Disconnect Switch; G HDC

Grounding Switch; G HDC

Manual Switch Operators; G HDC

Switch Insulators; G HDC

Interlocking; G HDC

SD-05 Design Data

Structural Design Criteria and Seismic Calculations; G, HDC

Structural design criteria and seismic calculations shall be submitted for approval within 210 calendar days after date of award. Design criteria and calculations shall be performed by qualified civil or structural engineers who are presently registered professional engineers (PE). A cover sheet for the submittal shall be provided and stamped or sealed and signed by a

PE.

SD-06 Test Reports

Factory Tests; G, HDC

Insulator Tests; G, HDC

Type Tests

SECTION 33 75 10.00 26 Page 5

SD-07 Certificates

Disconnect Switch Manufacturer's Erecting Engineers

SD-10 Operation and Maintenance Data

Operation and Maintenance Manuals; G HDC

Contractor-Furnished Training of Government Personnel; G HDC

1.4 MANUFACTURER'S QUALIFICATIONS

The circuit switcher and disconnect switch manufacturers shall have experience with the production of equipment of the same type and rating as described in these specifications.

1.5 GENERAL REQUIREMENTS

1.5.1 Bill of Materials

Submit a comprehensive bill of materials (schedule of equipment) for each shop drawing set submitted. The schedule shall be part of the drawing set, having a title block, border, and sheet number compatible with the drawing set. The schedule shall provide a cross reference between manufacturer data and shop drawings, regardless of whether the product data is submitted at the same time as the shop drawing set. The schedule shall include the total quantity, manufacturer, part number, and location of each item of equipment supplied. For complete assemblies, provide the serial numbers of each assembly, and a sub-schedule of replaceable components within the assembly.

1.5.2 Manufacturer's Nameplate

The base of each pole of the switch, the enclosure of each operator, shall bear the manufacturer's nameplate, which shall be in accordance with

IEEE C37.30.

1.5.3 Contractor's Drawings

The following drawings shall be submitted in accordance with paragraph:

SUBMITTALS:

a. Mounting details and dimensions.

i. Location and dimensional data of switch terminals.

ii. Dimensional data pertaining to the arc of travel of disconnect and grounding switch blades.

iii. Plan and elevation for travel of energized parts during operation showing clearances for existing walls and steel structures.

iv. Open-gap (metal-to-metal) distance.

v. Net weight of each complete single pole assembly, including insulators and surge resistors.

vi. Mounting details for limit switches, auxiliary switches, and auxiliary contacts, and provisions for adjustment.

SECTION 33 75 10.00 26 Page 6

vii. Net weight of the operators.

b. Outline drawings of the switch arrangement for each pole showing installation dimensions, including the operating mechanism.

c. Detailed wiring diagrams showing both the internal and external connections, auxiliary switches, and interlocks.

d. Schematic diagrams for the motor-operator control scheme and auxiliaries, and key interlocking.

PART 2 PRODUCTS

2.1 OUTDOOR CIRCUIT SWITCHER, DISCONNECT, AND GROUNDING SWITCH

2.1.1 69 kV Circuit Switcher General Requirements

Provide an outdoor rated 3-pole resettable SF6 gas filled puffer-type 69 kV Circuit Switcher as shown. It shall be 69 kV class, 400 A minimum continuous rating, Interrupting rating 31,500 kA with a peak withstand of 81 kA, 3-cycle, 3-phase 3-wire, 60 Hz. The individual poles shall be interconnected to provide three phase tripping simultaneity of less than

0.25 cycle. It shall be provided with spring-charged stored-energy operating mechanism utilizing 125 VDC control power and shall have position indication for "closed and charged" and "open and discharged" with suitable contacts for remote operation and indication. The Circuit Switcher shall be S&C Electric "Transrupter" or approved equal.

2.1.2 General Switch Requirements

The disconnect switch, grounding switch, and manual switch operators shall be complete with linkages, terminal connectors, hardware, accessories, and necessary mounting devices, all as specified herein. The disconnect switch shall be 3-pole, outdoor, vertical break type, horizontal upright, with three insulator stacks per pole, and group-operated with simultaneous operation of all three poles. The operating linkage shall be adapted for the supporting structure with the coordination of the switch manufacturer.

The motion of the switch blades shall be accomplished through the rotation about its axis of one insulator stack per pole in each switch. The switch shall be adapted for mounting on the structure without modifications to the structure, except for the addition of mounting plates as required to match with the existing structure. The operators shall be contractor-designed to be operable from the grade level and shall include a grounded operators platform.

2.1.3 Support Structure

Switches will be mounted on the new structures as indicated on the drawings. Mounting plates and/or adapter plates necessary to mount the new switch on the structure shall be determined by the disconnect switch manufacturer and provided by the switch manufacturer. 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 pipe fittings, shall be in accordance with ASME B1.20.1. Manufacturers' standard threads and construction may be used on small items, which are integrally replaceable, except that threads for external connection to these items shall meet the above requirements.

SECTION 33 75 10.00 26 Page 7

2.1.4 Structural Design Criteria

Structural design criteria and seismic calculations shall be provided for the switch design. Structural design criteria shall include the following:

a. Indicate the industry standards used in developing the seismic forces and analysis techniques used in design of the switch and switch components.

b. The effect of seismic design forces shall meet or exceed that obtained from the requirements and methods referenced in IEEE 693, or ASCE 7, Section 13.3 "Seismic Demands On Nonstructural Components", with a spectral response acceleration SDS=0.2055, component importance factor IP=1.50, and z=h=1.

d. The effect of wind load forces shall be accounted for based upon Section 26.5.1 "Basic Wind Speed" of ASCE 7, or 40 psf, whichever is greater.

2.1.5 Construction

The tie between the hinge and jaw insulator stacks of the switches formed by the switch blade in the closed position shall be such that all stresses will be balanced. A positive tie in the form of a bridge shall be provided between the rotating and stationary insulator stacks at the hinge end. The switches shall open and close smoothly without appreciable jar or vibration. Each switch pole shall be manufactured so that the blades are toggled into both the open and closed positions. All current-carrying parts of the switches shall be made of non-ferrous materials of high conductivity and shall contain not more than ten-percent zinc. Hinge pins shall be made of high-grade corrosion-resistant materials. Bolted contact surfaces shall be silver plated. Brazing will not be permitted except as necessary for coating the contact surfaces. Points and sharp angles on blades, clips, and terminals shall be avoided or adequately shielded against corona discharge.

2.1.6 Hardware

Bolts, nuts washers and pins used in the assembly of non-ferrous parts shall be silicon bronze conforming to ASTM B98/B98M, Alloy B, or non-magnetic stainless steel. Other corrosion-resistant metals may be used, if approved by the Contracting Officer. Bolts and pins shall have a minimum tensile strength of 75,000 pounds per square inch.

2.1.7 Galvanizing

All galvanizing shall be performed in accordance with ASTM A123/A123M or ASTM A153/A153M as applicable and the zinc-iron alloy formed at the surface of the bare steel shall not exceed approximately 70 percent of the total zinc layer deposited.

2.1.8 Ratings for 69kV Disconnect Switches

The ratings of the switches shall meet or exceed the minimum requirements as indicated below and shall conform to the requirements of ANSI C29.9, ANSI C37.32, and IEEE C37.30.

a. Rated Maximum Voltage, kV rms 72.5

b. Basic Impulse Insulation Level, kV Crest 350

SECTION 33 75 10.00 26 Page 8

c. Continuous Current Rating, Amperes, rms 1,200

d. Short-Time Current Rating, kA, rms 61

e. Insulator Stacks, Technical Ref. No. TR 287278

2.1.9 Bases

The bases of a switch shall be fabricated from structural steel conforming to the requirements of ASTM A36/A36M. Each single-pole switch element shall be assembled on an individual base. The bases shall be rigid and self supporting, without cross bracing between phases other than the steel supporting structure, as shown on the contract drawings. The bases shall be constructed so that the deflection under maximum operating force will not interfere with the successful operation of the switch when the bases are mounted rigidly at the points of support. Galvanized mounting bolts and beveled washers shall be furnished by the Contractor for mounting the switches on the steel structure.

2.1.10 Blades

Blades shall be of tubular construction able to withstand operation under the weather and ice conditions specified in paragraph: GENERAL INFORMATION and to provide maximum strength with minimum weight. They shall be sufficiently rigid to prevent whip or vibration and of a configuration that will minimize an accumulation of ice, sleet or other foreign matter. All blades on disconnects shall be counter-balanced to insure optimum ease of operation and smooth control.

2.1.11 Contacts

All main switch contacts shall be of the high-pressure type. In opening, contact pressure shall be released prior to angular motion of the blade, and in closing, pressure shall not be applied until after angular motion has ceased. Contacts shall be self-cleaning but shall be so manufactured that the wiping action will not cause scarring or abrasion of the contact surfaces. If contact surfaces are of silver, the silver shall be not less than 10 mils thick. Fixed guides shall be provided so that proper seating of contacts will be obtained when a blade is out of line 1-inch or less in any direction.

2.1.12 Hinge Connections

The current-carrying path through the hinge mechanism of the switches shall be by means of movable pressure type contacts of proven configuration. The entire hinge mechanism of the switch shall be so configured and constructed that nesting of birds and insects is prevented or does not interfere with proper operation of the switch.

2.1.13 Terminals

Switch terminal pads shall be of high-strength aluminum alloy or high-copper alloy with silver-plated contact surfaces suitable for connection of copper or aluminum conductors. The terminal pads shall be NEMA six hole type per ANSI C37.32 Figure 1(c) able to accommodate NEMA two or four hole connections. Terminal loading shall meet the requirements of ANSI C37.32 Table 4 for the switch type and rating.

SECTION 33 75 10.00 26 Page 9

2.1.14 Switch Bearings

All bearings shall be ample in size to sustain the imposed loads and of a type to ensure continued ease of operation and long life. Bearings provided at the base of the rotating insulator column for each switch pole shall be of the ball or roller type and shall be adequately protected from the weather to prevent the entrance of dirt or moisture and resulting corrosion. All other bearings shall maintain proper alignment, ensure ease of operations, and ensure against corrosion and seizing under the operating conditions specified in paragraph: GENERAL INFORMATION. All gears shall be enclosed in weatherproof cases to retain the necessary lubrication to cover the gears. All main switches shall have bearings at the base of each rotating insulator stack and, if necessary, additional bearings at the top of the stack.

2.1.15 Switch Insulators

Each pole of each switch shall be provided with stacks of insulator units as described in paragraph: General Switch Requirements complete with posts and hardware. Insulators shall be technical reference number as specified in paragraph: Ratings for 115kV Disconnect Switches and in paragraph:

Ratings for 230kV Disconnect Switches. Each insulator unit shall be porcelain or composite material, and shall be of a type and style being currently produced by the switch manufacturer, conforming to the applicable requirements of ANSI C29.9. Suitable means shall be provided to adjust the vertical axis on all insulator stacks when assembled.

2.1.16 Arcing Horns

The switch jaw and the blade end shall be equipped with arcing horns. The arcing horns shall be the manufacturer's standard for switches of the ratings provided. Arc horn details and the associated equipment spacings shall be included on the manufacturer's submitted drawings.

2.1.17 Grounding Switch

The grounding switch shall be a 3-pole unit provided with a manual operating mechanism for the grounding blades, installed on the jaw end of the disconnect switch.

In addition to the above requirements for the disconnect switch, the grounding switch stationary contacts shall have a short-time current rating of 63k amperes. The contact surfaces shall have sufficient wiping action to be self-cleaning. Grounding blades shall be of the same quality of material and workmanship as the main switch blades.

2.2 OPERATING MECHANISMS

2.2.1 Construction

The disconnect switch shall be provided with an operating mechanism for group operation of the three blades. All operating mechanisms shall be suitable for operating the switches without the use of special tools and shall be complete with linkages, cranks, gears, bearings, interlocks, and levers. The bases and parts of the operating mechanisms shall be to the manufacturer's approved drawings. Brackets, plates, channels, angles, bolts, nuts, and washers for mounting the mechanisms, bearings, housings, and auxiliary switches on the steel structures shall be furnished with the switches and shall be galvanized or made of corrosion resistant material.

SECTION 33 75 10.00 26 Page 10

The operating mechanism shall provide smooth thoroughly-controlled simultaneous movement of the switch blades throughout the entire cycle of operation. The entire configuration shall be such that cantilever or torsional stresses imposed upon any insulator column by the operation of the switch shall not exceed the safe limits of the column. Provisions shall be made for the individual adjustment at each pole to compensate for misalignments of the switch bases and operating shafts. After final adjustments, it shall be mechanically impossible for any blade to remain in the open or closed position when the mechanism has been operated at any speed. All hinge pins, cotter pins, piercing set screws, and lock washers shall be of corrosion-resistant metal. All holes in cranks and linkages having moving pins shall be drilled (not punched) to accurate fit. All fittings shall be attached to connecting rods or pipes with through-bolts or self-tapping set screws in addition to other means of attachment to insure that there will be no slipping of connections. Gears and bearings made of corrosion-resistant metal shall be covered with a waterproof silicone-type grease at the time of factory assembly, or shall be completely immersed in a suitable lubricant. Gears and bearings of non-corrosion resistant metal shall be completely immersed in a suitable lubricant, or may be covered with a silicon-type grease, subject to approval of the Contracting Officer. The gears, bearings and lubricant shall be sealed in the case to produce a mechanism which does not require maintenance.

2.2.2 Grounding

Each operating mechanism shall be provided with a 24-inch flexible copper braid conductor, equal in current-carrying capacity to No. 4/0 AWG copper cable, for grounding the lower end of the operating shaft or operating lever.

2.2.3 Operator Bearings

The weight of the shaft shall be supported by a roller or ball bearing at the bottom and/or at the top of the shaft. If over 20 feet in length, the shaft shall be provided with a guide or steady bearing so constructed that accumulations of foreign materials will not interfere with the operation and repeated operations will not affect the corrosion-resisting coating on the shaft and the stationary part of the bearing.

2.2.4 Shafts and Linkages

All pole-to-pole and controller-to-pole connecting operating shafts and linkages shall be continuous, with only the necessary fittings located at their extremities. The vertical operating shafts shall be of the torsional type with suitable pipe guides or bearings at intervals of not more than ten (10) feet. A mechanical device indicating the "OPEN" and "CLOSED" positions of the blades of the switch shall be provided at the lower end of the vertical operating shaft for the blades. The indicator shall be of corrosion-resistant metal and located where it will be readily visible from the ground. All vertical and horizontal operating shafts, and connecting pipe or shafting between phases shall be constructed of corrosion-resistant material. Provision shall be made for padlocking each mechanism in both the open and closed positions.

2.2.5 Interlocking

Each manual disconnect switch and grounding switch mechanism shall be provided with mechanical interlocking provisions to prevent operation of

SECTION 33 75 10.00 26 Page 11 the switch while the switch is energized. The grounding switch operating mechanism shall be interlocked with the disconnect switch mechanism to prevent the closing of the disconnect switch when the grounding switch is in the closed position, as well as to prevent the closing of the grounding switch when the disconnect switch is in the closed position. The interlocking system shall be similar to Kirk Key and shall be keyed to be compatible with the existing keyed interlock system in use at the Project.

2.2.6 Manual Operating Mechanisms

Geared type manual operators shall drive a worm or bevel gear operated with a crank. The motion of the handle shall be clockwise to close and counterclockwise to open the switch. All gears and worms shall be lubricated and completely enclosed in gear cases. The non-detachable crank shall be not more than 15 inches nor less than 12 inches in length. A rain-tight shield shall be provided where the vertical shaft extends through the gear case. All gear-operating mechanisms shall be enclosed in a weatherproof case made of corrosion-resistant metal, or metal hot-dip galvanized in accordance with ASTM A153/A153M. All cases shall retain the necessary lubrication to cover the gears, shall be fitted with a drain hole and captive plug in the bottom, and shall be provided with pressure fittings if parts require periodic grease lubrication.

2.2.7 Grounding Switch Operator

The grounding switch operator shall be manual, meeting the requirements of paragraph: MANUAL OPERATING MECHANISMS.

2.3 SWITCH TOOLS AND ACCESSORIES

The Contractor shall furnish one complete set of all special tools, wrenches, and other appurtenant equipment that may be necessary or convenient for assembling, aligning or disassembling the switches.

2.4 SPARE PARTS

All spare parts shall be of the same material, and manufacture as the original parts, and they shall be interchangeable therewith. The following spare parts shall be furnished:

a. Three (3) complete assemblies of stationary and moving shoes, or tip assemblies, for main contacts of one pole of each voltage class of disconnect switch and also for the grounding switch.

b. One (1) complete set of auxiliary contacts and springs for the disconnect switch and also for the grounding switch.

2.5 CURRENT TRANSFORMERS

The new current transformers shall be provided and placed on the new contractor-designed elevated equipment platform. They shall be an oil-filled top core design suitable for bi-directional metering in outdoor applications, ABB Type CXM-350 or approved equal. They shall be design and tested to exceed the 0.15S class in accordance with IEEE C57.13, and be provided with porcelain insulators. They shall have the following maximum ratings:

Maximum System Voltage 72.5 kV Insulation Level 140 kV - 1 min

SECTION 33 75 10.00 26 Page 12

Rated Impulse Level 350 kV Peak Ratio 30:5 Short Time Thermal Current 150 x rated ratio for 1 second Rated Dynamic Current 2.5 x thermal rating Accuracy and Burden 0.15SB1.8 with 0.15% accuracy from 0.5% to

400% rated current, 0.3B1.8 at 0.25% rated current

2.6 TUBULAR BUS CONNECTORS

Connectors and hardware for tubular bus shall be bronze alloy, expansion terminal tube to flat. Tongue holes shall have NEMA spacing. The connector shall be similar to Hubbell FSTFL-G connector.

2.7 SWITCHYARD INSULATORS

New insulators for the rigid bus connection to 69kV circuit switcher shall be wet process porcelain enamel, and shall comply with the applicable requirements of ANSI C29.1, ANSI C29.2, and ANSI C29.9. Polymer-type insulators will not be acceptable. Insulators shall be gray in color, with galvanized forged steel pins, and shall be glazed on all surfaces.

Suspension insulators shall be standard ball and socket type suspension insulators and shall be ANSI class 52-3 in accordance ANSI C29.2. Bus support insulators shall be outdoor station post type conforming to ANSI C29.9. Insulators shall be rated for the voltage at which they are applied. The manufacturer's name, manufacture date, mechanical and electrical strength ratings, and proof test values shall be embossed on each insulator.

2.8 ALUMINUM TUBULAR BUS

Rigid bus as detailed in the plans shall be aluminum tubular type 2" bus designed for use with 69kV switchyard type installations and in accordance with ASTM B317/B317M.

PART 3 EXECUTION

3.1 FACTORY TESTS

3.1.1 Routine Test

Each item of equipment shall be given the manufacturer's routine factory tests and other tests specified below. The factory test equipment and the test methods used shall conform to the applicable requirements of ANSI Standards, IEEE Standards, and NEMA Publications and are subject to the approval of the Contracting Officer. All tests required will be witnessed by the Contracting Officer unless waived in writing, and no equipment shall be shipped until it has been approved for shipment by the Contracting Officer. The Contractor shall notify the Contracting Officer a minimum of 30 days in advance of the date of the tests so that arrangements can be made for the Contracting Officer to be present at the tests. The cost of performing all tests shall be borne by the Contractor.

3.1.2 Group-Operated Disconnect and Grounding Switch Type Tests

The Contractor shall have performed the specified design tests or type tests on switches of identical construction and of the same voltage, continuous current and momentary current ratings as those specified. The following tests shall have been performed in accordance with the applicable provisions of IEEE C37.34:

SECTION 33 75 10.00 26 Page 13

a. Dielectric tests including low-frequency, dry-withstand, and impulse-withstand, temperature rise tests, and short time current tests.

b. Switching impulse test.

c. Ice test.

d. Radio influence test.

e. Corona test.

f. Hinge mechanism tests demonstrating momentary and continuous current capacity as specified.

3.1.3 Group-Operated Disconnect and Grounding Switch Factory Tests

All tests shall be witnessed by the Contracting Officer, unless waived in writing, and no equipment shall be shipped until it has been released for shipment by the Contracting Officer:

a. Each single-pole of the disconnect switch shall be assembled without insulators, inspected and given the manufacturer's routine production and operating tests. Tests shall be performed with switch mounted in a position as shown on the contract drawings. Factory adjustment shall be so made that field changes will not be required on the switch beyond the point where interphase connections are attached to the rotating insulators.

b. All parts shall be properly marked and identified for ease of field assembly.

c. Dimensions in accordance with the applicable contract and manufacturer's drawings shall be verified.

3.1.4 Insulator Tests

The following tests shall be made on the specified insulators. All tests shall be performed in accordance with ANSI C29.1 and as specified below.

3.1.4.1 Design

The original design tests of insulators of identical construction and ratings as those specified shall have been made in accordance with the requirements of ANSI C29.9.

3.1.4.2 Production

Insulators shall be given routine tests as specified in ANSI C29.9. Quality Conformance Tests described in ANSI C29.9 will be required for insulators furnished under the contract, unless waived in writing.

3.2 OPERATION AND MAINTENANCE (O&M) DATA

Operation and Maintenance Manuals shall be submitted per SECTION 01 78 23.00 26 OPERATION AND MAINTENANCE DATA. The O&M manual shall contain all information that may be needed or useful for operation, maintenance tasks with specific instructions and associated frequencies, repair, dismantling or assembling, and for identification of parts for ordering

SECTION 33 75 10.00 26 Page 14 replacements, including step-by-step operating instructions, description of individual operating parts as well as the systems as a whole, and identification of lockout/tagout points. The address, telephone, and website (if available) for the manufacturers' service organization shall be clearly identified in the manual.

Manuals shall contain the following information for the switch, operators, and any accessory equipment included therewith:

a. Complete instructions covering the operation, adjustment and maintenance of the equipment. Cuts or drawings shall be provided showing all points where adjustments may be made.

b. Drawings which identify all spare parts by either part number or item and drawing number.

c. Information and drawings on insulators provided with the switches.

3.3 SERVICES OF THE DISCONNECT SWITCH MANUFACTURER'S ERECTING ENGINEERS

One or more competent erecting engineers shall be furnished, fluent in the English language who shall be responsible for the correctness of the instructions given the erecting Contractor. An erecting engineer shall have at least 2 years experience with the disconnect switch manufacturer and shall be thoroughly familiar with the manufacturer's design. An erecting engineer's qualifications shall be submitted for approval not later than 60 days prior to shipment of the equipment. When so requested, the erecting engineer(s) shall give and be responsible for giving complete and correct direction for the storage of the breakers, and later the initial starting and all subsequent operation of the equipment until the field tests are completed. The erecting engineer(s) shall initiate instructions prior to shipment of the equipment for all actions necessary for the proper receipt, inspection, storage, handling, assembly, and testing of the apparatus furnished to the erection Contractor by the Government under this contract. The erecting engineer(s) shall also keep a record of all measurements taken during erection and shall submit one copy on request or on completion of installation of the assembly or part. In addition to the above the Erecting Engineer shall provide the Contracting Officer with a daily report. The report shall include inspection activities, instructions provided, test results, recommendations, and observations. The erecting engineer(s) shall instruct the Government's representative in the operation and maintenance features of the work by conducting training courses as described in paragraph CONTRACTOR-FURNISHED TRAINING OF GOVERNMENT PERSONNEL. Erection will be performed under another contract and the erecting engineer(s) shall cooperate fully with the erection Contractor. The work and operations of the erecting engineer(s) will be coordinated with the program of construction at the erection site as directed.

3.4 CONTRACTOR-FURNISHED TRAINING OF GOVERNMENT PERSONNEL

After the disconnect switches have been placed in service, a course shall be conducted in their theory, operation and maintenance. The course shall be of 8 hours minimum duration (one full working days) for approximately eight Government employees at the project. The course shall include disconnect switch, grounding switch, and motorized operator design and theory of operation, construction of the actual switches furnished, routine maintenance, trouble analysis, any special shipping and handling procedures, and safety precautions. Demonstrations shall be on the actual

SECTION 33 75 10.00 26 Page 15 switches and operators furnished, to the maximum extent possible. Major overhaul procedures shall be covered briefly, with greater emphasis on emergency procedures. Course material shall use to the maximum extent possible, the site-specific operation and maintenance data specified in SECTION 01 78 23.00 26 OPERATION AND MAINTENANCE DATA. The Government may videotape the training sessions for future use.

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