W912DW-17-R-0011_Amendment_0004.pdf

W68MD963150131

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

Albeni Falls Pow erhouse Station Service Sw itchgear

Please see Continuation Page for details.

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY 27-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 W912DW-17-R-0011

X 9B. DATED (SEE ITEM 11)

24-Feb-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 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

27-Mar-2017

CODE

USA ENGINEER DISTRICT, SEATTLE

ATTN: CECT-NWS

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:

W912DW-17-R-0011

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

The purpose of Amendment four (0004) is as follows:

Incorporate below items as indicated.

1. Specifications/Drawings – revised/new specification(s) and drawing(s) are as follows:

26 11 15.00 26, High Resistance Grounding System (HRG) – Medium Voltage

The attached revised section(s) 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.

2. Proposal Submittal Proposal submittal date/time remains the same: 4 April 2017 at 12:30:00 p.m. LOCAL TIME.

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

Encl:

26 11 15.00 26 (revised)

(End of Summary of Changes)

Albeni Falls Powerhouse 13.8 kV and 480 V Switchgear Replacement 15020 Oldtown, ID

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 11 15.00 26

HIGH RESISTANCE GROUNDING SYSTEM (HRG)-MEDIUM VOLTAGE

PART 1 GENERAL

1.1 GENERAL REQUIREMENTS

1.2 REFERENCES

1.3 SUBMITTALS

PART 2 PRODUCTS

2.1 HIGH RESISTANCE GROUNDING EQUIPMENT (HRG)

2.2 MATERIALS

2.3 DISCONNECT SWITCHES

2.4 TRANSFORMERS

2.5 RESISTORS

2.6 BUS

2.7 WIRING/TERMINATIONS

2.8 ENCLOSURES

2.9 NAMEPLATES

2.10 FINISH

2.11 ACCESSORIES

2.12 Foundations

2.12.1 Foundation Details

PART 3 EXECUTION

3.1 FACTORY TESTS

3.2 FIELD QUALITY CONTROL

3.3 TESTING AND COMMISSIONING

3.3.1 Testing

3.3.2 Commissioning

3.4 DRAWINGS

3.4.1 As-built drawings

3.4.2 Outline Drawings

3.4.3 Connection/Assembly Drawings

3.5 DEMOLITION

3.6 INSTALLATION OF HIGH RESISTANCE GROUND EQUIPMENT (HRG)

3.7 CONTRACTOR-FURNISHED TRAINING FOR GOVERNMENT PERSONNEL

3.8 QUALIFICATIONS OF FIELD ENGINEERING SERVICE PERSONNEL

3.9 RELAY SETTINGS

-- End of Section Table of Contents --

SECTION 26 11 15.00 26 Page 1

W912DW-17-R-0011 R0004

SECTION 26 11 15.00 26

HIGH RESISTANCE GROUNDING SYSTEM (HRG)-MEDIUM VOLTAGE

PART 1 GENERAL

1.1 GENERAL REQUIREMENTS

a. This section covers the supply and installation of three (3) 13.8 kV high resistance grounding (HRG) systems at The Albeni Falls Powerhouse. The systems will be connected to the wye point of each of the 3 Main Unit generators. The three generators are rated 15,000 kVA. The line to line voltage is 13,800 volts, and the line to neutral voltage is 7,970 volts.

b. The generator HRG systems will be installed in the same location as the existing generator neutral grounding breakers, as shown on drawings. The HRG equipment shall be mounted in a NEMA 12 enclosure, ventilated as necessary, conforming to the applicable requirements.

c. The grounding equipment for each system shall include a dry-type transformer, resistor, single-pole hook-stick-operated disconnecting switch, and the associated wiring.

d. The generator HRG systems shall be connected to the generator relays, located at the SC board.

1.2 REFERENCES

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

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2012; Errata 2012; INT 1-4 2012; INT 5-7 2013) National Electrical Safety Code

IEEE C37.20.1 (2002; INT 1 2005; AMD A 2005; AMD B 2006;

R 2007) Standard for Metal-Enclosed Low-Voltage Power Circuit-Breaker Switchgear

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

IEEE C37.20.4 (2013) Standard for Indoor AC Switches (1 kV - 38 kV) for Use in Metal-Enclosed Switchgear

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

SECTION 26 11 15.00 26 Page 2

IEEE C37.34 (1994) Standard for Indoor AC Switches (1 kV - 38 kV) for Use in Metal-Enclosed Switchgear

IEEE C57.12.01 (2005) General Requirements for Dry-Type Distribution and Power Transformers Including Those with Solid-Cast and/or Resin-Encapsulated Windings

IEEE C57.12.50 (1981; R 1998) Ventilated Dry-Type Distribution Transformers, 1 to 500 kVA, Single-Phase, and 15 to 500 kVA, Three-Phase, with High-Volt 601 to 34,500 Volts

IEEE C57.12.91 (2011) Standard Test Code for Dry-Type Distribution and Power Transformers

IEEE 32 (1972; R 1997) Standard Requirements, Terminology, and Test Procedures for Neutral Grounding Devices

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA C29.10 (1989; R 200) Wet-Process Porcelain Insulators (Indoor Apparatus Type)

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

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2008; Errata 1-2010; Changes 1-3 2010;

Changes 4-6 2011; Change 7 2012) Safety and Health Requirements Manual

SECTION 26 11 15.00 26 Page 3

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:

SD-02 Shop Drawings

Outline Drawings ; G, HDC

Submit within 60 days after receipt of notice to proceed.

Connection/Assembly Drawings ; I, HDC

Submit within 60 days after after receipt of notice to proceed

As-Built Drawings ; I, HDC

Drawings which accurately depict the as-built configuration of the installation shall be submitted within 30 days of acceptance of HRG installation.

Foundation Details ; G, HDC

General Arrangement Drawings ; G, HDC

SD-03 Product Data

Within 60 calendar days after receipt of notice to proceed., submit manufacturer's data, drawings, catalog cuts, and wiring diagrams. Submitted manufacturer's data sheets shall be color copies of the original documents and be of good quality, easily read and marked or hilited indicating the specific equipment being submitted and labeled as to which equipment (by designation) the submitted equipment is installed with and show compliance with the contract specifications. Manufacturer's data sheets submitted for the O&M manuals shall be the original documents and not be copies. As a minimum, submittals shall be required for but not be limited to the following:

Grounding Transformers ; G, HDC

Grounding Resistors ; G, HDC

Disconnect Switches ; G, HDC

Wire ; G, HDC

Terminal blocks ; G, HDC

Current Transformers ; G, HDC

SECTION 26 11 15.00 26 Page 4

Nameplates ; G, HDC

Catalog cuts, brochures, circulars, specifications, product data, and printed information shall provide sufficient detail and scope to verify compliance with the requirements of the contract documents.

SD-06 Test Reports

Submit procedures for factory and field testing 30 days prior to testing.

Factory Test Procedure ; G, HDC

Field Test Procedure ; G, HDC

Within 30 days after testing has been completed, Contractor shall provide five certified copies of all test results.

Factory Test Results ; G, HDC

Field Test Results ; G, HDC

PART 2 PRODUCTS

2.1 HIGH RESISTANCE GROUNDING EQUIPMENT (HRG)

a. The assemblies shall consist of free standing NEMA 12 enclosures.

The sides and rear shall be covered with removable bolt-on covers.

Front and rear access are required. All edges of front covers or hinged front panels shall be formed. Provide adequate ventilation within the enclosure.

b. The assemblies shall be provided with adequate lifting means and shall be capable of being moved into installation position and bolted directly to contractor supplied floor sills to be set level in concrete per manufacturer's recommendations. Bases of the assemblies shall be suitable for rolling directly on pipes without skids.

c. Each vertical steel unit forming part of the assemblies shall be a self-contained housing. Control compartments, disconnect switch compartments, and resistor compartments shall be segregated by means of steel barriers or, if indicated on the drawings, the resistor and disconnect switch assemblies shall be a separately mounted component furnished in its own ventilated compartment.Submit General Arrangement Drawings showing layout showing locations and mounting of all major internal components.

d. All equipment furnished under this contract shall meet the requirements of NFPA 70 , and other standards as specified in this document. Finished painted surfaces and metal work shall be wrapped suitably or otherwise adequately protected from damage during shipment. Cubicles shall be prepared for shipment so that slings for handling may be attached readily while the parts are in the railway car or truck.

SECTION 26 11 15.00 26 Page 5

2.2 MATERIALS

All copper bus bars, conduit, fittings, connections, wire , wire markings, conductors, and terminal blocks shall conform to Section 26 00 00.00 26

MISC ELECTRICAL WORK AND EQUIPMENT.

2.3 DISCONNECT SWITCHES

The grounding equipment for each Main Unit Generator shall include a single-pole hook-stick-operated primary disconnecting switch. The disconnect shall be operable with a hook stick from the outside of the cubicle. The switches shall meet the following requirements:

a. The switches shall be vertically mounted.

b. The switches shall be single pole, non-fused, hook operated type.

c. The rating shall be a minimum of 15 kV with a minimum 95 kV BIL.

d. The minimum continuous current rating shall be 300 amperes.

e. Switch contacts shall be silver plated, self-aligning and provided with a means to maintain contact pressure.

f. Each switch shall have two 15 kV minimum mounting porcelain insulators.

g. The switches shall conform to the applicable requirements of IEEE C37.20.4 , IEEE C37.32 , IEEE C37.34 and NEMA C29.10 .

2.4 TRANSFORMERS

a. The grounding transformers shall be a copper winding complying with IEEE C57.12.01 and IEEE C57.12.50 . Each transformer shall be a single-phase, 60 Hz, indoor ventilated, dry-type, self-cooled transformer rated 13,800-240 volts, and with the high-voltage line terminals and winding rated 95-kV BIL, and 15-kV insulation class.

The transformers for the generator neutrals shall be rated 15 kVA.

The maximum temperature rise when carrying rated load continuously and cooled by natural air circulation shall not exceed 115 degrees Celsius temperature rise above 30 degrees C average or 40 degrees C maximum ambient when installed in the grounding equipment cubicle.

SECTION 26 11 15.00 26 Page 6

b. The transformer core and coils shall be provided with lifting eyes suitable for handling the transformer. All leads and taps shall be so supported that all weight is removed from the coils, and the coils shall be securely braced to prevent injury. The cores shall be rigidly clamped or bolted to prevent shifting during shipment and to prevent vibration under operating conditions. The core lamination shall be free from burrs which may puncture the insulation between laminations and shall be securely fastened to prevent excessive vibration in normal service or displacement under short-circuit conditions. All transformer leads and taps shall be securely braced to prevent displacement or injury during transit or installation and under short-circuit conditions. The coils may be cast in epoxy resin.

Epoxy resin shall be non-hygroscopic, non-flammable, and self-extinguishing. Regardless of insulation type, all insulation impregnation and casting shall be performed under VPI process.

2.5 RESISTORS

a. The sets of grounding resistors for the Generators shall be rated to allow for 5 to 10 amperes of current in the primary of the grounding transformer. Taps shall be provided for 5 to 10 amperes of ground current in 1 ampere increments. The grounding conductor shall be initially connected to the 6 ampere tap. The set of resistors for the generators shall be:

1. Rated for continuous use . Resistors are required to be rated for Continuous Use.

2. Have a resisitance of Have a minimum resistance of 0.521 Ohms

3. Rated to pass 266A at 240 VAC. Rated to Pass a minimum current of 266 Amps.

4. Rated to hanlde teh handle the thermal dissipation of 36.9KW

b. All resistors shall conform to IEEE 32 except that they shall be insulated for not less than 240V AC and the rated maximum temperature of the resistors shall not exceed 415 degrees Celsius when mounted inside cubicle with natural air cooling. The resistors shall have taps wired out to a convenient front accessible terminal block.

c. All resistors shall be heavy-duty industrial type, wire wound or grid design. Each resistor tube shall have a stamped steel rating nameplate. The resistor assembly shall be interconnected with suitable wire size as required for the circuit current. The resistors shall have mounting brackets for mounting in the cubicles. All steel support materials shall be corrosion-resistant steel or hot-dipped galvanized. The units shall be completely isolated from ground.

Terminals shall be provided to allow connection with separate lugs of both 500 kCMIL and 12 AWG wire.

d. All interconnection wire used on resistors shall be non-pvc coated wires.

2.6 BUS

A 1/4-inch x 2-inch copper ground bus shall be firmly secured to the assembly. Provide terminals for connection of the Powerhouse System grounding conductor, suitable for #8 AWG to 500 kCMIL copper.

SECTION 26 11 15.00 26 Page 7

2.7 WIRING/TERMINATIONS

a. The switchgear manufacturer shall provide suitable terminal blocks for secondary wire terminations and a minimum of 10% spare terminals shall be provided. One control circuit cutout device shall be provided in each control circuit. Switchgear secondary wire shall be #14 AWG, type SIS rated 600 volt, 90 degrees C, furnished with wire markers at each termination. Wires shall be terminated on terminal blocks with marker strips numbered in agreement with detailed connection diagrams.

b. Neutral terminal for wye connected system shall be suitable for #6 AWG to 500 kCMIL power cables.

2.8 ENCLOSURES

The HRG systems described in these specifications shall be indoor NEMA 12 construction, with devices arranged as shown on contract drawings.

a. Each unit shall be enclosed in a self-supporting dead-front fabricated housing constructed of sheetmetal on a rigid steel frame and provided with metal partitions or barriers as required. Exterior panel surfaces shall be free from holes, seams, dents, weld marks, loose scale, or other imperfections, and shall not be drilled or welded for attachment of wiring, resistors, or other 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. Manufacturer's standard ventilating openings shall be provided as required for proper ventilation. Intake vents shall be filtered, and both intake and exhaust vents shall be provided with corrosion-resistant insect-proof screens on the inside.

b. Interior and exterior surfaces of equipment enclosures shall be thoroughly cleaned after fabrication, and then shall receive a rust inhibitive phosphatizing in accordance with IEEE C37.20.1 requirements.

2.9 NAMEPLATES

a. Engraved nameplates, mounted on the face of the assembly, shall be furnished for all control devices as indicated on the drawings.

Nameplates shall be laminated plastic, white characters on black background, and secured with screws. Characters shall be 3/16-inch high, minimum. Furnish master nameplate giving HRG system designation, voltage and ampere ratings, manufacturer's name, catalog number, and general order number. Nameplates shall be in accordance with SECTION 26 00 00.00.10 GENERAL ELECTRICAL WORK AND EQUIPMENT.

b. Control components mounted within the assembly, such as fuse blocks, relays, pushbuttons, switches, etc., shall be suitably marked for identification corresponding to appropriate designations on manufacturer's wiring diagrams. Control Components shall be in accordance with SECTION 26 00 00.00 26 .

SECTION 26 11 15.00 26 Page 8

2.10 FINISH

The finish shall consist of a coat of gray (ANSI-61), thermosetting, polyester powder paint applied electrostatically to pre-cleaned and phosphatized steel and aluminum for internal and external parts.

2.11 ACCESSORIES

The Contractor shall furnish one complete set of handling and testing accessories for testing the HRG system. The complete lot of accessories shall include:

1 -- Hook stick for generator neutral disconnecting switches.

2.12 Foundations

Foundations and housekeeping pads shall be constructed using structural steel as per SECTION 03 60 00.00 26 . Anchorage shall be as per SECTION 03 60 00.00 26 and SECTION 13 48 00.00 26 . All foundations shall be suitable for the dynamic switching forces of the circuit breaker and the specified seismic forces. A concrete housekeeping pad shall be constructed as per SECTION 03 60 00.00 26 , for all electrical equipment except where new equipment is being added to existing equipment and no housekeeping pad is currently installed under the existing equipment.

Housekeeping pad construction shall be coordinated and approved by the COR.

2.12.1 Foundation Details

Submit foundation details for installing channel sills in floors or housekeeping pads including block-out sizes and spacings as indicated in the "Details" drawings. To include grounding connection details and diagrams. See SECTION 03 60 00.00 26 and SECTION 13 48 00.00 26 for anchoring details.

PART 3 EXECUTION

3.1 FACTORY TESTS

The Contractor shall submit a Factory Test Procedure for all units. The tests procedure shall include the following information, at a minimum, for each design:

(a) an estimated schedule of testing durations

(b) descriptions of each test, including connections and equipment.

Blank or sample test sheets are acceptable assuming the equipment type and configuration matches the proposed transformer being tested.

(c) test levels for each test, where applicable

(c) test levels for each test, where applicable

(e) Calculated values

a. The following standard factory tests shall be performed on the equipment provided under this section. All tests shall be in accordance with latest version of ANSI and NEMA standards.

(1) Completely test the high-resistance grounding system for

SECTION 26 11 15.00 26 Page 9 operation under simulated service conditions to assure the accuracy of the wiring and the functioning of all equipment.

(2) The wiring and control circuits shall be given a dielectric test of 1500 volts for one (1) minute between live parts and ground in accordance with IEEE C37.20.2 .

b. Submit Factory Test Results .

3.2 FIELD QUALITY CONTROL

a. Provide the services of a qualified factory-trained manufacturer's representative to assist the Contractor in installation, testing and startup of the equipment specified under this section. The manufacturer's representative shall provide technical direction and assistance to the Contractor in general assembly of the equipment, connections and adjustments, and field tests of the assembly and components contained therein. Each item of equipment supplied under this contract shall be given the routine field tests to ensure successful operation of the systems. The test equipment and the test methods used shall conform to the applicable requirements of ANSI Standards and IEEE Standards.

3.3 TESTING AND COMMISSIONING

3.3.1 Testing

The Contractor shall perform field acceptance testing to verify that each transformer is undamaged from shipping and fit for service. A Field Test Procedure shall be submitted prior to field acceptance testing. The procedure shall include the required tests, listed below, at a minimum, in addition to a schedule showing expected durations, and a list of test equipment used to complete testing.

As a minimum, the following tests shall be performed:

a. Disconnect Switches shall be tested by a one-minute power frequency dielectric test of 19 kV, in accordance with IEEE C37.34 , clause 4.

b. Transformers shall be tested by:

(1) Applied-voltage test in accordance with IEEE C57.12.91 , section 10.3.

(2) Induced-voltage test in accordance with IEEE C57.12.91 , section 10.4.

(3) Ratio test using either the voltmeter method or the ratio bridge method according to IEEE C57.12.91 , section 7.3.1 or section 7.3.3. The measured impedance and resistance of the transformer windings shall be furnished.

c. Resistors shall be tested by the applied-potential test in accordance with paragraph 10.3.2 and ac resistance in accordance with paragraph 10.1.4 of IEEE 32 .

d. Submit Field Test Results .

SECTION 26 11 15.00 26 Page 10

3.3.2 Commissioning

The Contractor shall be responsible for performing all equipment commissioning required by the equipment manufacturers and as noted in SECTION 01 91 00.00 28 SYSTEMS TESTING AND COMMISSIONING of this contract.

3.4 DRAWINGS

3.4.1 As-built drawings

As-built drawings shall be submitted in accordance with SECTION 01 78

00.00 28 CLOSEOUT SUBMITTALS. As-built drawings shall indicate internal wiring connections, terminal block wiring, and location of terminations of external wiring.

3.4.2 Outline Drawings

Provide outline drawings of the cubicle together with weights and overall dimensions. These drawings shall include the overall dimensions of the equipment; the size and location of conduit and cable entrances; details of provisions for bolting equipment to the floor, and seismic certification.

3.4.3 Connection/Assembly Drawings

Provide connection and assembly drawings. The drawings and data shall include sectional views of the HRG cubicle, description of the neutral grounding transformer, disconnect switch assembly ratings and resistor, equipment lists and nameplate schedules. The wiring diagram shall show connections among the components to the terminal blocks in the cabinet.

Drawings shall indicate all wire numbers and termination points.

3.5 DEMOLITION

a. Contractor shall remove and dispose of existing neutral grounding breakers, patch holes in floor as per requirements of SECTION 03 60 00.00 26 , and paint to match existing floor.

b. Contractor shall remove and dispose of existing neutral grounding conductor and control wiring associated with existing system.

SECTION 26 11 15.00 26 Page 11

3.6 INSTALLATION OF HIGH RESISTANCE GROUND EQUIPMENT (HRG)

a. All the construction activities shall be coordinated with the Contracting Officer's Representative so that the construction will not adversely affect the daily operation of the powerhouse. Installation of each Main Unit HRG shall be repalced as part of the Generator Switchgear outage and SJ switchgear installation. All switching will be done by Government operating personnel. De-energization of the individual generators will be allowed for a limited length of time.

Contractor will be required to shut down one generator at a time and isolate neutral grounding system to be removed. The Contractor shall verify that drawings showing existing controls are accurate prior to starting work.

b. Unless otherwise specified, execution of all installation work shall be in accordance with NFPA 70 , IEEE C2 , IEEE Standards C37, and EM 385-1-1 . If a deviation from the above standards is specifically shown or specified, the drawings and specifications shall govern.

Omission of details on the drawings or in the specifications shall not be construed as permitting deviations from the Code requirements.

c. Contractor shall install HRG equipment as indicated on drawings in compliance with the manufacturer's connection/assembly drawings.

d. Electrical equipment and accessories shall be installed so interference with existing piping, ducts, cable trays, conduit, architectural, and structural features will be avoided. If interferences develop, the Contracting Officer will decide which work shall be relocated. The Contractor shall not cut or weaken structural portions of the powerhouse in installing equipment and accessories unless specifically approved in writing.

e. Contractor shall install HRG equipment and enclosure, complete with all primary and secondary connections. Equipment shall be securely fastened to the concrete structure as per the provisions of SECTION 13 48 00.00 26 . If the transformer is not bolted securely to the cabinet, fasten transformer to the concrete structure as per the provsions of SECTION 13 48 00.00 26 . Paint as required to repair damage to paint from shipping or installation.

f. Install cable from the Main UnitGenerator neutral point to the disconnect switch. Cables shall be rated 15 kV, #6 AWG. Stress cones shall be used to terminate the conductors. All exposed connections between the neutral point and neutral grounding transformer shall be insulated to 15 kV.

g. Ground HRG system to the station grounding system with a minimum of #2/0 copper grounding conductor. If transformer is grounded to cubicle ground bar at factory, separate grounding of transformer is not required. Connect the cubicle ground bar to the station grounding system with a minimum of a #2/0 copper grounding conductor.

SECTION 26 11 15.00 26 Page 12

3.7 CONTRACTOR-FURNISHED TRAINING FOR GOVERNMENT PERSONNEL

a. Not later than 30 calendar days prior to testing, six copies of the instructor's background and qualifications.

b. After the High Resistance Grounding systems have been placed in service, Field Engineering Services will instruct Project personnel on the theory, operation and maintenance of the new equipment. The course shall consist of Qty. two each - 1 hour duration classes for operators and Qty. one each -one hour duration class for maintenance personnel (three separate sessions total). Classes shall be conducted for approximately 10 Government employees at the project for each session.

c. The courses for the operators shall be scheduled so that all operators can attend. The operator's course shall include High Resistance Grounding design and theory of operation, construction of the actual equipment furnished.

d. The Government may videotape the training sessions for future use.

3.8 QUALIFICATIONS OF FIELD ENGINEERING SERVICE PERSONNEL

The Contractor shall provide qualified field engineering service personnel who are fluent in the English language to supervise, test and install the HRG equipment. The personnel shall have a minimum of two (2) years experience in the installation and testing of new HRG equipment. The Field Engineering Service Supervisor shall certify that the equipment has been installed in accordance with the manufacturer's recommendation and all warranties are in affect.

3.9 RELAY SETTINGS

The relays shall be set in the field by the Contractor in accordance with calculations done by others. The Contractor shall coordinate with the COR for this information. Current Transformers shall be wired to shorting terminal blocks within the HRG enclosure for access by relay leads.

-- End of Section --

SECTION 26 11 15.00 26 Page 13