BIDDING INSTRUCTIONS for SEALED BIDS Fax Or E-Mail Bids Will Not Be Accepted

BIDDING INSTRUCTIONS FOR SEALED BIDS

Sealed bids will be accepted at the Grand River Dam Authority Administrative Headquarters located at 226 West Dwain Willis Avenue, Vinita, Oklahoma. Bids received after the bid opening time and date will not be opened or considered.

RFQ or RFP Number: 19159

Bid Opening Time & Date: 10/02/15 2:00 PM CT

Description: Single Phase Autotransformer

Contracting & Acquisitions Agent: Sammie Prince

Bids must be enclosed in a sealed envelope or package and addressed as follows:

PURCHASING UNIT SEALED BID No. 19159 GRAND RIVER DAM AUTHORITY 226 WEST DWAIN WILLIS AVE VINITA OK 74301

Express Mail/Overnight packages must also be addressed as above.

Bids not addressed as instructed above negate the confidentiality of the sealed bid and, therefore, will be rejected and returned to the bidder without being considered.

All bids responses shall be typewritten or handwritten in ink, and any corrections to bids shall be initialed in ink. Bids and proposals submitted in pencil will not be accepted.

All bids and proposals shall include an original signature of the bidder and shall be accompanied by a properly executed non-collusion affidavit with original signatures and notary seal.

Bid responses are to include payment terms and delivery information. Bids and proposals shall be quoted FOB: Destination/Freight Allowed unless stated otherwise within the Request for Quote. All packaging, handling, shipping and delivery charges shall be included in the unit price quoted for each line item. No exceptions will be granted unless approved by the guidelines of the Chief Financial Officer or designee.

Fax or e-mail Bids will not be accepted.

Bidders opting to decline the bid offering are requested to submit a response with a brief explanation.

Grand River Dam Authority is an agency of the State of Oklahoma, fully supported by customer revenues instead of taxes.

Administrative Headquarters • 226 West Dwain Willis Avenue • Vinita, Oklahoma 74301 • Phone: 918-256-5545 • Fax: 918-256-1051

GRDA Finance Form 005 (10-2006) REQUEST FOR QUOTE # 19159

RFQ # 19159 Quotation Due By: 10/02/2015 REPLY TO: T Bid Due Time: 2:00:00 PM Samantha E. Prince VENDOR INFO: VENDOR #: 99999.00 PURCHASING DEPARTMENT NAME: Grand River Dam Authority CONTACT: 226 W DWAIN WILLIS AVE PO BOX 409 ADDRESS 1: VINITA OK 74301 ADDRESS 2: CITY: STATE: ZIP: PHONE: 918-256-0638 FAX: EMAIL: 918-256-1051 EMAIL: [email protected] PHONE: FAX:

NOTE: 1.The bid opening date for this RFQ is October 2, 2015. Each bid response must be received by 2:00 p.m. Central Time so it can be recorded as received prior to the bid opening time.

2.The outside envelope for each bid must be marked as (Sealed Bid 19159). See instructions on the Sealed Bid cover sheet.

3.A completed non-collusion affidavit is required and must be submitted with your bid.

4.This form must be signed by an authorized representative of your company in the space provided in the lower right hand corner of this form.

5.The award to the successful bidder will be based on the lowest and best bid received that meets the specifications listed below and the requirements herein. Preference may be given to E-pay vendors if analysis estimates that such appears to result in a lower cost to GRDA.

6.The brand names, model(s), part number(s) provided herein are for comparable quality and identification purposes only and equivalent bids may be submitted.

7.GRDA will take into consideration past performance and ability to meet delivery deadlines in the evaluation.

8.Vendor to submit one (1) original signed copy and one "computer readable" version (e.g., CD-ROM, CD-R, ect.) of the entire bid proposal.

9.Questions will be received until September 9, 2015 at 5:00 PM Central Time at [email protected].

10.Bidders should list the cost to provide these units by

1) August 15, 2016

2) By the bidder's optimum delivery date.

Bidders should specify their optimum delivery date in their bid response.

****** Read the General Bidding Instructions attached to this RFQ for further instructions.******

GRDA Visa Payment GRDA provides a Visa payment program which invoices payment by a secure Visa account number assigned to the supplier after award of contract. Notification of payments and required invoice information are issued to your designated Accounts Receivable contact by e-mail remittance payment. Preference may be shown during the evaluation process to bidders that agree to accept the Visa payment of invoices. To learn more about the benefits of the Visa payment program, and to obtain answers to FAQ, click or copy and paste the following URL into your browser: www.bankofamerica.com/epayablesvendors.

Will accept payment by Visa: Yes ____ No ____ (check one) REQUEST FOR QUOTE # 19159

Visa acceptance signature: ______

Designated Accounts Receivable Contact for Visa remittance advices:

Name: ______

Phone: ______

Email: ______LINE NUMBER OF UNIT OF UNIT LINE ITEM DESCRIPTION UNITS MEASURE PRICE COST LEAD TIME

1 70/93.3/116.6/131.6 MVA, 345/138/13.2 kV, single- 1.0 EACH phase, autotransformer, with LTC per the attached specifications. Unit Price for delivery by: August 15, 2016

$______

Line Cost for delivery by: August 15, 2016

$______

Unit Price for delivery by the bidder's optimum date. $______

Line Cost for delivery by the bidders optimum date. $______

Bidders optimum delivery date ______GRDA Item # 043-1076-000-000

NOTE: All prices must be quoted FOB: Destination. All freight charges to delivery point must be included in the unit price PAYMENT TERMS: quoted for each line item. All packaging, handling, delivery and any other surcharges must also be included in the price quoted QUOTE EXPIRATION DATE: for each line item. QUOTATION NUMBER:

QUOTED BY (please print):

SHIP TO: Grand River Dam Authority COMPANY NAME: TRANSMISSION & ENGINEERING HDQTRS 635 HWY 69A SIGNATURE: PO Box 1128 PRYOR OK 74362 DATE OF QUOTE:

THIS IS NOT AN ORDER. We would be pleased to receive your quotation for furnishing the above. This form must be completed in full (including signature) and returned by the due date above. You may attach additional pages if necessary. If attached, the Non-Collusion form must be completed and returned with your quotation. NO PARTIAL SHIPMENTS OR PARTIAL PAYMENTS WILL BE ALLOWED WITHOUT PRIOR APPROVAL. All articles purchased hereunder shall be in accordance with the Bidding Procedures and General Terms & Conditions contained on the attached sheets.

______PROPOSAL TO THE GRAND RIVER DAM AUTHORITY FOR PURCHASE OF 70 MVA 345/138/13.2 KV Single-Phase Autotransformer

Bidder:

Business Address: Street No.

City State Zip Code

Telephone Number ______Fax Number ______E-Mail ______Date:

The Bidder named above hereby tenders his bid and declares that the only person or persons interested in this proposal is or are named above; that the bid is made without collusion with any other Bidder and is in all respects without collusion or fraud. The Bidder further declares he has examined the specifications and has read the attached INSTRUCTIONS TO BIDDERS for the Purchase of a 70 MVA, 345/138/13.2 KV Single-Phase Autotransformer and agrees to furnish all the materials necessary or proper on the terms, and under the conditions set forth therein and in the specifications, and to accept in full payment the firm lump sum bid listed below:

$ , Total in Writing:

Dollars.

Cost Breakdown:

Cost of the autotransformer, delivered to the specified location: $

Cost adder for Supply Contract Bond if required per section VIII: $

Total Autotransformer Cost Quoted: $

The autotransformer will be delivered weeks after receipt of order.

Bidder lists the following similar autotransformers produced within the last two years, including companies, contact names, and phone numbers for references:

Bidder shall include the following with his bid submittal: 1. A scaled drawing showing the dimensions of quoted unit. 2. If this is not a firm bid, identification of any adjustable costs along with itemized weights or quantities that are affected by the adjustments. 3. If this is not a firm bid, identification of the adjustment factors and values that will be used to apply to the items in #2 above. 4. If this is not a firm bid, identification of the percentage of the bid total that is material related and the percentage that is labor related (for estimating cost adjustments).

Signed:______

(Seal)

Quotation Data Entry Sheet 70 MVA 345/138/13.2 KV Single-Phase Autotransformer

Bidding Company Brand of Autotransformer Quoted (Manufacturer) Location of Manufacturing Plant Losses: No Load Losses (kW) Load Losses (kW) Auxiliary Equipment Power (kW) 55ºC Autotransformer Rating: (ONAN/ONAF/ONAF) MVA 65ºC Autotransformer Rating: (max MVA value) Tertiary Rating (kVA) Impedance (%) at 70 MVA base 345 kV to 138 kV 345 kV to 13.2 KV 138 kV to 13.2 kV Warranty: Months after receipt by GRDA Months after energization Location for warranty work to be done Weights (lb): Core and Coils Tank and Fittings Liquid (oil) Total Installed Weight Shipping Weight (largest piece) Oil (gal) Dimensions (inches) Height Overall Length Depth Shipping Height Base Dimension: (Width x Depth) Efficiency: (%) Full Load 75% load 50% load 25% load Regulation: (%) 0.80 Power Factor 1.0 Power Factor Sound Level (dB)

Bushings: (Manufacturer) High voltage (345 kV) Low voltage (138 kV) Tertiary Voltage (25 kV) Surge Arrestors: (Manufacturer) High voltage Low voltage Tertiary Voltage LTC Manufacturer and Model Cooling Equipment: Number of Radiators Number of Fans, First Stage Number of Fans, Second Stage

Is a Payment Schedule Required? (Yes/No)

Payment Schedule: (Provide % values for only those that apply) At Receipt of Order At Submission of Approval Drawings At Receipt of Key Materials At Completion of Core At Completion of Final Assembly At Completion of Pre-Delivery Testing At Shipment At Receipt by GRDA Quoted Price of Spare Parts: ($) HV Bushing (345 kV) LV Bushing (138 kV) Tertiary Bushing (25 kV) LTC Contacts

Receipt of Drawings by GRDA (weeks ARO) Delivery to FOB Location: (weeks ARO) Accepts Liquidated Damages Clause (Yes/No) Is a FIRM price bid (Yes/No)

Field Service Representative Daily Costs (in excess of original 5 days required)

EXCEPTION STATEMENT

This part of the proposal must be completed even if no exceptions are stated.

State only the EXCEPTIONS. Do not include comments and/or clarifications, which may be shown by attachments to the Proposal.

EXCEPTIONS (If no exceptions, state “NONE”; provide additional pages if needed).

______

NON-COLLUSION AFFIDAVIT (To Accompany Bid Proposal)

STATE OF ______) ) SS COUNTY OF ______)

______, of lawful age, being first duly sworn, on oath says: 1. (S)He is the duly authorized agent of ______, the Bidder submitting the competitive bid which is attached to this statement, for the purpose of certifying the facts pertaining to the existence of collusion among Bidders and between Bidders and state officials or employees, as well as facts pertaining to the giving or offering of things of value to government personnel in return for special consideration in the letting of any Contract pursuant to the bid to which this statement is attached;

2. (S)He is fully aware of the facts and circumstances surrounding the making of the bid to which this statement is attached and has been personally and directly involved in the proceedings leading to the submission of such bid; and

3. Neither the Bidder nor anyone subject to the Bidder’s direction or control has been a party:

a. to any collusion among Bidders in restraint of freedom of competition by agreement to bid at a fixed price or to refrain from bidding;

b. to any collusion with any state official or employee as to quantity, quality or price in the prospective Contract, or as to any other terms of such prospective Contract; nor

c. in any discussions between Bidders and any state official concerning exchange of money or other thing of value for special consideration in the letting of a Contract.

4. The Bidder further certifies that no person who has been involved in any manner in the development of that Contract while employed by the State of Oklahoma shall be employed to fulfill any of the services provided for under said Contract.

______Signature Date

______Printed Name Title

______Agent Subscribed and sworn to before me this ______date of ______, 2015.

______Notary Public (Seal) My Commission Expires: ______

GENERAL BIDDING INSTRUCTIONS FOR SEALED BIDS GRAND RIVER DAM AUTHORITY

1. Bids shall be opened by the Purchasing Unit at the Grand River Dam Authority (hereinafter referred to as “GRDA” or “the Authority”) Administrative Headquarters, 226 West Dwain Willis Avenue, Vinita, Oklahoma 74301 on the date (and time, if applicable) shown on the attached RFQ or RFP form. Bids shall be in conformity with these and any additional instructions to bidders and shall be submitted on GRDA’s form. The RFQ (Request for Quote) or RFP (Request for Proposal) form must be completed in full and signed by the bidder. If your bid response necessitates additional space, you may attach additional pages; however, the RFQ or RFP form shall be completed, signed and reference the additional pages. All bid responses shall be typewritten or handwritten in ink, and any corrections to bids shall be initialed in ink. Quotations or proposals submitted in pencil shall not be accepted.

2. Sealed bids shall be submitted to the GRDA Purchasing Unit in a properly marked envelope or package, and shall be sealed. The name and address of the bidder shall be printed on the exterior of the envelope or package. The RFQ or RFP number and bid opening date shall be referenced on the face of the sealed envelope or package. Unmarked bids shall be rejected and returned to the bidder. Neither fax nor e-mail submissions shall be accepted for sealed bid requirements, as they negate the confidentiality of the bid. Any bid received via fax or e-mail for a sealed bid requirement shall be rejected and returned to the bidder. Bid opening time extensions shall not be granted. Bids received after the opening time and date shall not be considered. This is a formal bidding procedure with all bid packets recorded upon receipt and held unopened under lock until the bid opening at the time, date and location listed on the RFQ or RFP. At public bid openings, a short description of the item and the bid price will be read. The information shall be recorded on a bid tabulation to be used during the subsequent bid evaluation. Interested bidders may make an appointment to review quotations after an evaluation, recommendation and bid award has been made.

3. Non-Collusion Affidavits: RFQs or RFPs anticipated to exceed a total amount of $2,500 shall be accompanied by a Non-Collusion Affidavit. This affidavit shall be completed by the bidder and include an original signature in ink of an authorized company representative (preferably the bidder) with full knowledge and acceptance of the bid proposal. The affidavit shall be notarized, with notary seal or stamp affixed. A facsimile or copy of an original signature or notary seal shall not be accepted. The Non-Collusion Affidavit with original signature and notarization shall be mailed with the bid response to the attention of the Contracting & Acquisitions Agent listed on the RFQ or RFP. Purchase orders in excess of $2,500 will not be released to the successful bidder without receipt of an original and properly executed affidavit for the bid.

4. In the event the unit price and line total extension do not agree, the unit price shall be considered the quoted price accepted for evaluation.

5. Freight Terms: All prices shall be quoted FOB: Destination/Freight Allowed. All packaging, handling, shipping and delivery charges shall be included in the unit price quoted for each line item. No exceptions shall be granted unless approved by the guidelines of the GRDA Chief Financial Officer or designee.

6. Other Surcharges: Any additional surcharges (such as HazMat charges, fuel surcharges, set-up fees, etc.) shall be included in the unit price quoted for each line item. All additional charges are considered a part of the cost of the goods, and bids shall be evaluated to include these additional charges.

7. Tax-Exempt Status: GRDA is an agency of the state of Oklahoma and is specifically exempt from the payment of sales tax by Oklahoma state statute, Title 68 O.S.A. § 1356 (10). An excerpt from the statute shall be furnished upon request.

8. Questions arising during the bidding process should be submitted in writing to the Contracting & Acquisitions Agent named on the RFQ or RFP. The GRDA Contracting & Acquisitions Agent shall coordinate a reply from the end user to ensure that all potential bidders

are provided the same information. Under no circumstances shall a bidder discuss pricing with any GRDA employee prior to the bid opening.

9. All bids submitted shall be subject to GRDA’s Purchasing Policy and Procedures, General Terms and Conditions, the bidding instructions and specifications, the Oklahoma Open Records Act, other statutory regulations as applicable, and any other terms and conditions listed or attached herein – all of which are made part of this Request for Quote or Request for Proposal.

10. GRDA reserves the right to reject any and all bids, and to contract as the best interests of the Authority may require. GRDA reserves the right to reject any bids that do not comply with the requirements and specifications of the Request for Quote or Request for Proposal. All bid responses become the property of GRDA and are subject to the Oklahoma Open Records Act. GRDA shall endeavor to protect technical information designated by the bidder as proprietary information; however, only technical information (i.e., “trade secrets”) may be considered proprietary – pricing and other non-technical aspects of the quote shall be considered non- proprietary.

11. “Sole Brand” Items: Items with a “Sole Brand” designation in the description shall be furnished as the specified manufacturer and model/part number. No exception may be taken to the specification, and no alternate shall be accepted. In those cases where a manufacturer has discontinued the specified model/part number, the bidder shall indicate so on the RFQ. If a replacement item is available, the new model/part number shall be indicated on the RFQ form and the price quoted. It shall also be noted whether the replacement item is a direct replacement for the obsolete part number originally requested. If not, or if the specifications differ in any way, the bidder shall explain in detail, and corresponding drawings or descriptive literature shall be included with the quote.

12. Approved Equivalents: Unless an item is designated as a “Sole Brand” item, any manufacturer’s name, brand name, information and/or catalog number listed in a specification is for informational purposes and is not intended to limit competition. Bidders may offer any brand/manufacturer for which they are an authorized representative, provided it meets or exceeds the specification of the listed item. However, if quoting an equivalent product, bidders shall indicate on the RFQ form the manufacturer’s name and part number. Bidder shall also submit any drawings, descriptive literature and specifications for evaluation purposes. Reference to literature submitted with a previous bid shall not satisfy this provision. The bidder shall also provide written confirmation that the proposed equivalent will meet the requested specifications and is not considered an exception. Bids which do not comply with these requirements may be rejected. GRDA warehouses are not permitted to accept any item with a part number differing from that quoted by the bidder. Bids lacking any written indication of intent to furnish an alternate brand, model or part number shall be considered to be in complete compliance with the specifications as listed on the RFQ.

13. Insurance Certificates: Any service to be performed that requires the vendor’s employee, vehicle or equipment to be on any GRDA property must be covered by minimum insurance requirements. The workscope to be performed for the Authority shall be evaluated and the minimum insurance requirements shall be provided to prospective bidders with the RFQ or RFP. Evidence of insurance coverage shall be furnished in the form of a Certificate of Insurance, and shall be submitted with the bid response. Bidders shall disclose any subcontractors to be used, and the Authority shall consider the supplier as the single point of contact. The supplier shall assume responsibility for the performance of the subcontractor. Policies shall remain current for the duration of the requested service period, and GRDA shall be notified of any cancellation or revision to policies. Purchase Orders shall not be released to the successful bidder without a current Certificate of Insurance naming GRDA as certificate holder on file. A Memorandum of Insurance shall not be acceptable for this requirement.

14. MSDS: Material Safety Data Sheets shall be furnished to GRDA’s Safety Department at the address noted on the PO prior to delivery of items.

15. Purchase Orders shall be awarded to the “lowest and best” or “best value” bidder. Line items may be split into multiple orders, taking low items from each respective bidder, or orders may be awarded on an “all or none” basis, whichever is in the best interests of the Authority. Award decisions are further subject to consideration of any additional terms and conditions contained in the bid proposal. Vendor protests must be submitted in writing to the Central Purchasing Unit of GRDA within 36 hours of award of contract or purchase order.

16. Successful vendor shall deliver the merchandise or perform the service as quoted. Substitutions or changes without prior approval of the GRDA Contracting & Acquisitions Agent shall be rejected and returned at the vendor’s expense.

17. Bidder Responsibilities: Bidders are to transact all phases of the purchasing function directly with the GRDA Contracting & Acquisitions Agent. Bidders are to conduct all written and verbal communication with the Authority through the GRDA Contracting & Acquisitions Agent. Bidders are to conduct negotiations ethically, without attempts to influence through offers of valuable personal gifts or entertainment. Bidders are to make available as requested any technical information which might be of benefit in the bid evaluation.

18. Supplier List: The Finance Department maintains a current listing of suppliers with a cross- reference as to products and services offered. Suppliers may have their names added to the list by submitting a completed Vendor Registration/Payee Application, and shall notify the Authority of any update information. If a supplier fails to respond to bid requests after four appropriate solicitations, that supplier may be removed from the active list. Suppliers who do not meet quoted shipping dates or lead times, supply products or services of poor quality, substitute items of unequal quality, continually over-ship or under-ship items, or do not invoice properly may be placed under suspension or disqualified from the active supplier list. Suppliers may voluntarily request to be removed from the supplier database.

19. Timeliness of Delivery: The date quoted by the Bidder for delivery of the transformer will be considered in the analysis of this bid due to the need for this material as soon as possible. As such, time is of the essence in the delivery of this transformer. Should the contractor neglect or fail to deliver the transformer to the destination in the time frame defined by the contractor in his proposal, the contractor agrees to pay to GRDA, One Thousand Dollars ($1,000) per calendar day, not as a penalty, but as liquidated damages for each and every calendar day by which the actual delivery exceeds the quoted delivery. The liquidated damages described are fixed and agreed upon by the parties because of the impracticability and extreme difficulty of fixing and ascertaining the actual damages GRDA would sustain in such event. The said amount is agreed by the parties to this contract to be the amount of damages which GRDA would sustain.

20. Best Value Award: The award of this contract will be based on a “best value” criteria analysis, to include but not be limited to the following items in no order of preference: a. Compliance with the technical specifications b. Price c. Quoted delivery time d. Loss cost evaluation e. Locations of production and maintenance facilities f. Previous history of products with GRDA, if applicable

21. Supply Contract Bond or Letter of Credit: The selected Bidder may be required to provide a supply contract bond, or irrevocable letter of credit, with terms approved by GRDA, as described in Section VII Payment and Bonding of the enclosed Specifications. The amount of this supply contract bond, or irrevocable letter of credit, shall be one hundred percent (100%) of the bid amount including any optional items. Any bid submitted which requires a supply contract bond or letter of credit must be accompanied by a signed letter from an authorized official of a surety firm or bank agreeing to provide this supply contract bond or irrevocable letter of credit. The bond must be issued by a surety authorized to do business in Oklahoma and the surety company must

also be listed in Federal Circular 570. The Federal Circular may be found at http://www.fms.treas.gov/C570/c570_a-z.html

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GRAND RIVER DAM AUTHORITY 345/138/13.2 kV SINGLE-PHASE AUTOTRANSFORMER SPECIFICATIONS

I. GENERAL CONDITIONS

A. INTENT

It is the intent of these specifications to describe the requirements and conditions for furnishing and delivering FOB destination, via truck, freight prepaid, one (1) power single- phase autotransformer with all equipment, services, accessories, and other material as described herein. GRDA will evaluate bids on the basis of cost per kVA, quoted delivery, weights, dimensions, similarity to existing units in the bank, and other considerations. GRDA desires quotations for one, single-phase, oil-filled autotransformer with tertiary, 70/93.3/116.6/131.6 MVA, 55/65°C rise, 345/138/13.2 kV (delta), ONAN/ONAF/ONAF, 60- Hertz unit with load tap changer (LTC) and surge arresters. This single-phase unit will be used as a spare phase to an existing three-phase bank of identically sized single-phase units manufactured in 1988 by Westinghouse Electric Corporation (S.O. ATM3020).

B. STANDARDS

The autotransformer shall be designed, built, and tested in accordance with the latest revision of applicable standards of NFPA, EEI, ANSI, NEMA, and IEEE except where these specifications require equipment with characteristics exceeding the requirements of the listed agencies.

All equipment furnished shall be in accordance with the best modern practice. Any details not specifically covered shall be subject to the approval of GRDA. In the event of conflicting requirements between the standards and these specifications, these specifications shall apply.

C. BIDDER’S EXPERIENCE

1. The Bidder shall have been engaged in the business of constructing substation transformers for at least 10 years. He shall have successfully proved all equipment in actual central station or substation service.

2. The autotransformer furnished in response to this bid request shall be manufactured by the Bidder at his own plant(s).

D. DRAWINGS & INSTRUCTION BOOKS

1. The purpose of having drawings checked and approved by GRDA is to assure contract compliance and to assist the Bidder in interpreting specifications. The formal approval given to the Bidder is to be considered as in conformance with these purposes and in no manner shall be construed so as to relieve the Bidder from any liability or responsibility for proper design, fabrication, or compliance with the specifications.

2. One-line and outline drawings shall be provided to GRDA for approval eight (8) weeks

after receipt of order by the Bidder. Formal approval of all drawings by GRDA shall be obtained before any equipment is fabricated or shipped.

3. Drawings and instruction books shall be furnished for the equipment as follows:

Item For Final Shipped approval with unit Outline Drawings w/ shipping weight, 2 4 1 dimensions, etc Control schematics 2 4 1 Control wiring 2 4 1 Nameplate Drawing 2 4 Current Transformer 2 4 1 Performance curves Bushing Drawings 2 4 1 Instruction Books 2 4 2 Certified Test Results 4 1 Repair parts list 4 2 Bill of Material 2 4 1

Electronic copies of the drawings, in Adobe PDF and AutoCAD format Version 2014 or earlier, may be submitted for approval rather than the 2 paper copies listed above.

All documentation transmittals shall be identified with GRDA’s name, project designation, project description, etc.

4. No design drawings, data, etc. will be considered for review which are not complete in all respects and which have not been thoroughly checked by the Bidder. Design drawings, data, etc. will not be considered for review contingent upon other features/drawings that have not been submitted for review.

5. The approval drawings shall show the following: a. Overall dimensions, showing location of GRDA's connections, and all clearances required for erecting, operating, and dismantling. b. Base and support details, total weight details, and the location of jack pads, pulling eyes, etc. required for the foundation design. c. Weight information shall include total weight, shipping weight and the total volume of oil required. d. Overall shipping dimensions and weights shall be provided on a certified drawing to facilitate obtaining the proper moving permits. e. The location of all auxiliary equipment shall be designated on the drawings. f. Complete schematic and internal wiring diagram with external terminal designations for GRDA's connections. The wiring diagrams are to have sufficient space on GRDA's connection side of the external connection terminal blocks for the addition of GRDA's external cable designations. Panel wiring drawings shall clearly identify all devices and indicate front and/or back of panel wiring. g. Autotransformer nameplate, connection, and polarity diagrams. h. Instrument transformer connection and polarity diagrams and performance/excitation curves.

i. Bushing drawings. j. Drawings showing additional detail if requested by GRDA or if otherwise required for installation and maintenance.

6. GRDA and/or GRDA’s Engineer will review the drawings, data, etc., for compliance with specifications, will mark them to indicate whether changes or corrections are required and will return one set to the Bidder. The Bidder shall resubmit the corrected or changed drawings, data, etc. Changes or corrections, etc. shall be clearly indicated. A minimum of three (3) weeks shall be allowed for GRDA's drawing approval. The approval of GRDA and/or GRDA’s Engineer does not relieve the Bidder from any liability or responsibility for proper design, fabrication, or compliance with this specification.

7. Where standard drawings are furnished which cover a number of variations of the general class of equipment, each such drawing shall be individually endorsed to describe exactly which parts of the drawing apply to the equipment being furnished. Such endorsement shall be included on the approval drawings and include the job name, purchase order, or contract number and serial number of the particular item covered. Separate sheets of paper bearing the endorsement will not be acceptable unless pasted or stenciled individually on each print submitted.

8. Drawings shall be organized in a logical manner. Schematic drawings shall show all of one control function on the same drawing. Wiring drawings shall show the relative physical location of the devices, including terminals and adjacent devices to be on the same drawings. All device layouts shall be on the same drawing. Schematic drawings shall show the internal circuits of each device.

9. Installation Drawings: Instructions, drawings, and other specified documentation shall be submitted for installation purposes after GRDA gives final approval. This documentation shall provide complete installation and operation information.

10. Final Record: Final drawings shall be punched and bound with the instruction book or enclosed in the instruction books. Final books shall be submitted two (2) weeks prior to shipment and one final book with drawings shall be shipped with the autotransformer.

a. Final books shall be hard-backed and shall be properly labeled on the front outside with GRDA’s name and location, the autotransformer description, order numbers, shop order, etc. An electronic copy of the contents of the final book shall be provided in searchable .pdf format.

b. Prints of final drawings larger than 11" x 17" may be of reduced size if reduction does not decrease legibility.

c. Digitized AutoCAD files, Version 2014 or earlier, shall be provided for GRDA to reproduce drawings.

d. The factory test reports shall be included in the instruction books. An electronic copy of the test reports shall also be provided.

e. One set of the digitized reproducible drawings shall be provided.

f. Any modifications required during the warranty period shall be accompanied by revised final documentation as required to update the copies furnished.

g. A transformer damage curve shall be provided on 11” x 16.5”, Keuffel & Esser Company, Time-Current Characteristic, #48 5259, or equal, log-log graph tracing paper.

h. A spare parts list shall be included in each instruction book. The book shall provide maintenance and operating instruction for each component of the equipment, including descriptions and ratings of accessory equipment and schematic and wiring drawings of all factory wiring.

12. Detail Requirements:

a. Connection or wiring diagrams shall be the lineless type. All points such as coil terminals, capacitor terminals, etc., shall be identified on the connection diagrams.

b. All drawings shall comply with ANSI Y14, latest published revision.

c. Each drawing and certified document shall have the following as a minimum: 1) Purchase order or contract Numbers 2) Bidder’s Name 3) Bidder’s Shop Order Number 4) Bidder’s Drawing Number 5) Bidder’s Serial Number, when applicable

d. The following information for each motor shall be shown on the electrical schematic drawing(s): 1) Voltage, Phase, Power Factor and Horsepower Ratings 2) Starting and Full Load Currents 3) Type of Bearings 4) Quantity and Use (Function)

e. Autotransformer dimension outline drawing shall include the following: 1) Weight of Autotransformer Tank 2) Weight and Height of Core and Coils 3) Weight of Heaviest Part to be Handled at On-Site Erection. 4) Total Gallons of Oil 5) The Gallons of Oil lost that would cause a Trip of the Low Oil Alarm (For each Compartment with low oil alarm) 6) Gallons of Oil Required to Cover Core and Coils 7) Auxiliary Power Requirements: a) Total b) First Stage of Cooling c) Second Stage of Cooling 8) Type of Winding Material (Copper) 9) Location of All Accessories and Details of GRDA’s Power Connection and Control Conduit Locations.

f. Quality: 1) Legible drawings and data submitted to GRDA shall be of such quality that said

drawings and data shall be capable of yielding hard copy reproductions with every line, character, and letter clearly legible.

2) Documents submitted to GRDA that do not conform to the requirements of this specification shall be subject to rejection by GRDA. Bidder shall resubmit conforming documents. If conforming submittals cannot be obtained from the source documents, such source documents shall be retraced, redrawn, or photographically restored as may be necessary to meet with such requirements. Bidder’s (or his subcontractor’s) failure to initially satisfy the legible quality requirements herein set forth, will not relieve Bidder (or his subcontractor) from meeting the required schedule for submittal or drawings and data.

13. Mailing of Drawings and Data:

a. Approval drawings, etc., shall be transmitted by First Class mail or UPS to GRDA as follows:

Name Jeff Tullis Title Chief Engineer, GRDA Address 9933 E. 16th St. Tulsa, Oklahoma 74128

UPS/Shipping Address: Same as above

Telephone: 918-610-9717 Fax: 918-610-9888 E-mail: [email protected]

b. A letter of transmittal must accompany all drawings, data, etc.

E. LOSSES

1. Losses shall be determined and guaranteed at the rated voltage with the tap changers in the neutral or center positions.

2. No-load (core) losses shall be evaluated at a capitalized cost of $6,862 per kW @ 20°C

3. Load (copper) losses shall be evaluated at a capitalized cost of $1,390 per kW at the ONAN 55°C rating.

4. Auxiliary equipment power requirements shall be evaluated at a capitalized cost of $2,900 per kW at the maximum 65°C rating.

5. In evaluating the proposals, the total purchase price of the autotransformer will be calculated by adding the quoted price plus the evaluated cost of the no-load losses, plus the evaluated cost of load losses at the ONAN 55° C rating, plus the evaluated cost of the total auxiliary equipment power requirements.

6. An autotransformer which upon factory test does not have losses equal to or less than the

guaranteed losses stated in the Bidder’s Proposal, shall have its selling price reduced. The price reduction shall be the difference between the guaranteed losses and the actual losses that exceed the quoted guarantee as determined by the tests, multiplied by a 1.1 penalty factor, and then multiplied by the appropriate dollar assessments given in the preceding paragraphs. If one area exceeds the quoted value and the two others do not, only the one exceeding the quote will be used to calculate the price reduction. No credit shall be given for losses lower than the quoted values.

F. TESTS

1. All test readings shall be documented, certified, and sent to GRDA as a part of each instruction book.

2. GRDA shall be notified within the next working day of any test failure.

3. Bidder’s standard test procedures are acceptable.

4. These autotransformers shall receive all routine tests specified in the latest revision of ANSI C57.12.00. These tests shall be performed in accordance with the latest revision of ANSI C57.12.90.

5. Resistance measurements of all windings on the rated voltage connection and at the tap extremes.

6. Ratio tests on the rated voltage connection and on all tap connections.

7. Polarity and phase-relation tests on the rated voltage connection.

8. No-load (core) loss at rated voltage on the rated voltage connection and tap extremes.

9. Exciting current at rated voltage of the rated voltage connection and tap extremes. An Excitation Curve shall be furnished using test and calculated values to 2 per unit voltage.

10. Impedance and load loss at rated current on the rated voltage connection and on the tap extremes. Test sheet impedance values shall include both the positive sequence and zero sequence network values.

11. Temperature tests shall be made at the ONAN and ONAN/ONAF/ONAF ratings. Temperature tests obtained from previously manufactured similar units will be acceptable.

12. Induced potential tests.

13. Applied potential tests

14. Through Faults: Without limiting in any way any obligation of the Bidder under this agreement, the Bidder shall demonstrate to the satisfaction of GRDA that the autotransformer proposed to be furnished under this specification shall have sufficient mechanical strength to withstand, without failure, all through-fault currents. The Bidder shall demonstrate that the autotransformer meets this requirement by one of the following methods:

a. Certified test data showing that an autotransformer with a core and coil identical in design and construction and identical or similar with respect to kVA capacity, kV ratings, BIL, impedance and voltage taps has been tested without failure for short- circuit strength. A description of the test code under which the autotransformer was tested for short-circuit strength will be provided by the Bidder to GRDA.

b. A history of successful experience with autotransformers of identical or similar ratings, design, and construction. The Bidder shall list all autotransformers in-service with core and coils which are essentially identical in design, construction, and manufacture to the autotransformer covered by this specification and provide the date of installation, location, and failures, if any. Where such autotransformers have not been built or the cumulative service record is less than 20 autotransformer years, a list of autotransformers in service, which represents the closest approximation to the autotransformer covered by this specification, shall be submitted. The information submitted shall be representative of the total experience of the Bidder with the design of the autotransformer it proposes to furnish and include the dates of installation or shipping, the ratings of the autotransformers, and the failures and causes of failure, if any have been experienced. This history is not limited to the kVA rating of the autotransformer to be furnished hereunder. Such history or failures shall also include the approximate percentage of repair cost borne by the Bidder and the approximate time the unit was out of service for repairs.

15. Additional tests shall be performed as specified below in accordance with the latest revision of ANSI C57.12.90.

a. Corona Test (Partial Discharge): 1) This test shall be performed during the induced test.

2) The ratio noise meter shall be coupled to the terminals of the windings under test, either through a coupling capacitor or through the bushing capacitance taps. Shielding and filters are allowed to discriminate against external interference. The RIV is to be measured within the frequency range of 0.85 to 1.15 MHz.

3) On each winding terminal continuous monitoring or periodic readings at 5- minute intervals shall accompany the 1-hour test to insure that the apparent discharge level does not exceed 100 microvolts. The 1-hour test readings shall not exceed the RIV level measured at the rated maximum voltage readings by 50 µV or more

b. Impulse Test: (ANSI) 1) This test shall consist of: a) One Reduced Full Wave b) Two Chopped Waves c) One Full Wave

2) Impulse tests shall be made without excitation and performed in accordance with the latest revision of ANSI C57.12.90.

3) Each autotransformer shall be excited to 110% of maximum operating voltage before and after impulse testing, noting the change in exciting current and core

loss. Changes in either the exciting current or core loss or both which exceed 5% shall be corrected by reverse impulses. If correction to within 5% of before- impulse cannot be obtained, the unit(s) shall be considered failed.

4) Voltage and ground current oscillogram traces shall be made.

5) The Bidder shall furnish to GRDA one certified copy of complete impulse test results including oscillogram traces on a durable stock that will yield legible photocopies.

c. Power factor tests of completely assembled autotransformer utilizing the Doble test method, corrected to 20ºC, shall not exceed 0.5%.

d. Sound tests. 1) Audible Sound Level: This autotransformer shall be designed and guaranteed to have an average sound level not exceeding 5 dB below the level listed in the latest revision of NEMA Publication No. TR1. If the maximum average sound level with all auxiliary cooling equipment in operation exceeds the maximum sound level listed in the latest revision of NEMA Publication No. TR1, GRDA shall be notified so that sound insulation can be installed on the autotransformer at the Bidder’s expense. GRDA may perform an in-service field test.

2) Audible sound testing is required unless an essentially duplicate autotransformer has been sound tested by the Bidder. The successful Bidder shall, if omission of sound testing is requested, submit for approval three copies of such tests showing the design will meet the sound level specified.

16. GRDA and/or his representatives shall have the right to witness all tests and core and coil assembly before tanking. The Bidder shall advise GRDA 15 working days in advance of tests and tanking of core and coils so travel arrangements may be made. GRDA retains option to waive witnessing tests.

17. Prior to shipment of autotransformers, all test results shall be sent to GRDA for approval.

18. A copy of bushing Bidder’s test reports, including power factor, shall be forwarded to GRDA.

G. SHIPMENT

1. Shipping shall be f.o.b., Cleveland 345 kV Substation, approximately 5.8 miles north of Cleveland, OK. Final offloading at the site will be by the bidder and included in the quotation. The substation physical address is 3712 County Rd 5455, Hominy, OK 74035. The coordinates of the substation are Lat: 36.361783º N; Long: 96.473783º W. This is a 345/138 kV substation that will remain energized during the delivery and reassembly of this autotransformer.

2. Delivery shall be made during regular work hours for GRDA (Monday through Friday, 7:00 to 3:30 CPT). GRDA shall approve the delivery schedule for the autotransformer and auxiliary equipment. The Bidder shall be responsible for all demurrage charges for deliveries during hours other than those approved by GRDA.

a. GRDA shall be advised of the shipment dates two weeks in advance including the actual shipping date.

b. The Bidder shall notify GRDA 48 hours prior to releasing equipment for shipment. The Bidder shall then notify GRDA 48 hours prior to actual delivery to schedule personnel to be available at the Cleveland Substation. GRDA shall approve the schedule for oil delivery.

c. If the delivery of the transformer parts, bushings, cooling equipment, etc. requires multiple trucks, all trucks shall arrive at the same time for unloading.

3. Oil shall be shipped by truck only; oil delivery by separate rail tanker car is not acceptable. Upon receipt, oil is to meet ANSI or Doble TOPS (Transformer Oil Purchase Specifications).

4. A copy of Bills of Material and packing lists of all shipments shall be sent to GRDA two weeks before date of shipment. An additional copy shall accompany actual shipment.

5. Shipping Preparation:

a. If shipped partially by rail, shipment shall be done using a depressed center car. Final delivery to substation site will require truck transport provided by Bidder.

b. The autotransformer shall be shipped filled with dry air or nitrogen.

c. The Bidder shall adequately prepare, brace, weatherproof, and package all equipment for shipment and extended outdoor storage. The autotransformer and equipment packages or crates shall be adequately protected to prevent damage from high humidity, water, ice, snow, dust, etc.

d. Each item of equipment, box, crate, or other shipped article shall be clearly identified by stenciling or with a securely fastened, weatherproof tag with GRDA's purchase order or contract number (including revision number), equipment number (if any), box or crate number, box weight, and the Bidder’s reference number. All shipping containers, packing lists, bills of material, correspondence, etc. shall be identified with the same above information. All boxes, shipping containers, crates, etc. shall have a weatherproof packing slip, packed inside.

e. Oil-filled bushings shall be shipped per the Bidder’s recommendation.

f. Bidder shall install a pressure/vacuum gauge on the autotransformer tank prior to shipment to show whether or not adequate pressure was maintained during shipment.

g. Just prior to shipment, Bidder shall check and record the autotransformer tank dew point, temperature, and pressure. One copy of this data shall be shipped with the autotransformer and one copy sent to GRDA. If the receiving dew point exceeds the shipping dew point, the Bidder will bear the cost of drying out the autotransformer.

h. Bidder shall provide a crane for unloading the autotransformer at the substation site. This work will be done at a pad site being constructed by others, so coordination with GRDA or other contractors will be required. Note that the substation will remain

energized during the unloading process.

i. The autotransformer shall be shipped with an attached, continuous monitoring, GPS and impact recorder. GRDA shall have real-time computer access to the monitoring data including location, speed, and reports of any impacts.

H. ERECTION PROCEDURE

1. The Bidder shall provide an attachment to the instruction book that provides a step-by- step description of the erection procedure required to place the autotransformer in service properly. This procedure shall ensure the Bidder’s warranty.

2. The description shall include, but not be limited to the following:

a. Inspection and test, including electrical and dryness criteria, vacuum and oil filling procedures, and erection of all items.

b. Drawdown of oil after erection.

c. Oil requirements.

3. Field Supervision: This contract includes field supervision by the manufacturer's service personnel for the reassembly, field testing, adjustment, and readying autotransformer and accessory equipment furnished for service. All required field supervision shall be included in the proposal prices. Actual labor and equipment required for reassembly of the autotransformer will be provided by GRDA or its contractor.

4. Storage: The autotransformer will be stored on a concrete pad at an existing substation as a spare for future use if required. Bidder shall provide instructions for preparation of the unit for indefinite storage including any necessary auxiliary power connections, testing recommendations, or other requirements.

I. SPARE PARTS

The Bidder shall include, separately, a list of spare parts recommended for stocking by GRDA for maintenance and repair. These items are in addition to the parts required by this specification and are to be listed and priced separately on a unit basis. GRDA reserves the right to select any, all, or none of the equipment listed at the prices shown. Spare parts to be included as an option under this proposal are as follows:

PARTS QUANTITY

345 kV Bushing 1 138 kV Bushing 1 Tertiary Bushing 1 LTC Contacts 1 set

J. PROGRESS REPORT

The Bidder shall provide a Progress Report as follows:

1. Submit a report once each month beginning the month following receipt of purchase order or signed contract and ending during the month when final delivery of equipment and material is made.

2. Show status as of first of the month during which it is submitted.

3. Show revisions in the Bidder’s schedule when made.

4. The Progress Report shall show:

a. The status of work already accomplished.

b. The schedule of all work to be accomplished to final delivery date.

II. DETAILED SPECIFICATIONS

A. APPLICATION

1. The unit shall be an outdoor, single-phase, 60 Hertz, 55/65°C autotransformer with a tertiary winding and two stages of fan cooling for transmission tie operation. The unit shall be provided with load tap changing equipment to regulate the 138 kV secondary voltage. The autotransformer will be connected (in the future) to a system which has an effectively grounded neutral and will be utilized as a spare (4th unit) to similarly-sized autotransformers operating in a three-phase bank until needed.

2. The autotransformer tertiary will be used for a nominal station service load which will not exceed 75 KVA and possible future installation of 50 MVAR (maximum) reactors.

3. The autotransformer that is to be furnished shall have sufficient mechanical strength to withstand without failure all through-fault currents in accordance with provisions of ANSI C57.12.00, Section 7, latest revision.

B. AUTOTRANSFORMER RATINGS

1. Nameplate Ratings:

a. Duty...... …………………………………………………. Continuous

b. Maximum Ambient Temperature …………………………………. 40ºC

c. Maximum Temperature Rise Allowable for Altitudes 735-3300’ MS….ANSI- C57.12-00 d. Altitude of final installation location ……………………………. 1000 ft. MS

e. Impedance (H-X Winding): 7.2% Tolerance of ± 5% of the specified value. The zero sequence impedance of any autotransformer equivalent-impedance-leg shall be positive or the least negative value possible without increasing the cost of the

autotransformer.

2. The Bidder is asked to quote the unit as follows:

Primary H Secondary X Tertiary Winding Winding Winding Line to line voltage 345kV 138kV 13.2 kV Grounded Grounded Connections Delta Wye Wye Full capacity, no-load taps: Above rated voltage None None None Below rated voltage None None None Line insulation class kV 345 kV 138 kV 25 kV Neutral insulation class 25 kV None 25 kV Basic Impulse Level of winding 1050 kV 550 kV 150 kV Full capacity load tap changing 12 steps of None None equipment above neutral 1.25% taps Reduced capacity, load tap changing 12 steps of None None equipment below neutral 1.25% taps KVA Rating, 55º centigrade Rise, 70,000 70,000 15,000 ONAN KVA Rating, 55º centigrade Rise, 93,300 93,300 15,000 first stage of cooling ONAN/ONAF KVA Rating, 55º centigrade Rise, second stage of cooling, 116,600 116,600 15,000 ONAN/ONAF/ONAF KVA Rating, 65º centigrade Rise, second stage of cooling, 131,666 131,666 20,000 ONAN/ONAF/ONAF

3. The KVA ratings given above are to be based on the standard ANSI ambient cooling air temperatures of 40º C maximum and not over 30°C average in any 24-hour period, with the standard ANSI temperature rise of 55°C or 65°C, depending upon load and cooling equipment operation. The autotransformer shall be designed and constructed to be capable of operating at the specified maximum MVA rating with the above ambient cooling temperatures, without exceeding a maximum temperature rise of 65° C. The cooling equipment shall be provided with the autotransformer.

4. The tertiary winding shall be self-protecting against short circuit conditions.

5. The neutral lead and bushing of the autotransformer windings shall be capable of carrying not less than the secondary winding full load current continuously.

C. AUTOTRANSFORMER CONSTRUCTION

The autotransformer construction shall conform to the following requirements:

1. The tank shall be of a welded plate design. All tank seams shall be double welded (inside and out). Corners shall be constructed with an overlap to make use of “T” type welds or

shall have internal gussets.

2. All welds on all enclosures shall be continuous.

3. The tank shall have a welded-on cover. During welding of the autotransformer cover, an inorganic gasket will be permanently located between the cover and the tank flange to prevent the entrance of weld spatter into the tank.

4. The autotransformer tank shall be provided with tanking guides for centering core and coil assembly. The completed assembly shall have adequate internal bracing of core and coils to withstand handling, shipping, and operating stresses and forces. All shipping bracing requiring removal in the field shall be clearly marked on the outline drawings and shall be color-coded and marked on the autotransformer.

5. The tank shall be designed to withstand full-vacuum filling in the field. Auxiliary compartments, when not designed for full-vacuum filling, shall be so designated on the outline drawing and labeled as such on the compartment itself as well as on the autotransformer nameplate. Compartments of this type shall be provided with approved valves and piping for isolating or equalizing as required.

6. The autotransformer shall have a sealed tank construction for oil preservation. The system may be either a nitrogen blanket system or a conservator-type tank design.

7. Nitrogen Blanket System: a. Nitrogen system with ample gas blanket space above the oil. b. The gas blanket shall be maintained by a closed, fully automatic nitrogen system. c. The regulating equipment and nitrogen bottle shall be completely enclosed in a cabinet. The door to the cabinet shall have glass or plexiglass installed for viewing the bottle pressure without opening the door. d. One bottle of nitrogen shall be provided with the autotransformer.

8. Conservator Type Tank Design a. Conservator system shall use a fitted bladder to separate the autotransformer oil from the air. b. Provide a desiccant breather shall be installed for the air space in the conservator tank above the bladder. c. Conservator Tank(s) shall not obstruct horizontal access for conductors routed to any bushings or arrestors. Adequate electrical clearance shall be provided for any conductors that must be routed over a conservator tank. d. Surge arrestors shall not be mounted upon any conservator tank.

9. For autotransformers with a nitrogen blanket, the autotransformer tank shall be provided with a tapered, gas-sampling valve of 1/4" size. The valve shall not be located more than 66 inches above the base with a 1/4" or larger line extended to within one inch of the top of the gas space. The sampling valve can be located in the nitrogen regulating cabinet.

10. The main autotransformer tank and any compartments that are subject to operating pressures shall be designed to withstand without deformation, pressure 25% greater than the maximum operating pressures resulting from the oil preservation system. The minimum design pressure shall be + 12.5 psi (10 psi base plus 2.5 psi safety factor). The maximum operating pressures (positive and negative) that the autotransformer is

designed to withstand shall be indicated on the nameplate.

11. The centerlines of the tank shall be permanently and plainly marked near the base of all four sides of the tank and also shown on the outline drawing.

12. The shipping center of gravity shall be plainly indicated and dimensioned on the outline drawing and marked on the autotransformer tank sides and cover.

13. The completely equipped and oil filled center of gravity shall be plainly indicated and dimensioned on the outline drawing only for use in foundation design.

14. All accessory mounting brackets shall be adequately supported to provide a stable assembly. Supports for arresters shall be designed to resist a 40-pound per square foot wind loading on the arrester.

15. No welding of any type shall be required for field installation.

16. The design of each autotransformer shall be such as to permit energizing the autotransformer at a minimum oil temperature of -20° C. At this temperature, the oil level shall be above the low level marking and the alarm setting of the oil level gauge.

17. The autotransformer shall be divided into four segments or quadrants as viewed from the top and including the associated side faces. The top segment containing the low voltage bushing and its associated side of the autotransformer is defined as Segment 1. The other segments are numbered 2-3-4 clockwise as viewed from the top of the autotransformer. Segment 1 includes the low voltage bushing. Segment 3 includes the high voltage bushing. The tertiary bushings shall be in Segment 4.

18. All accessories shall be located in Segment 1, except:

a. Lifting and jacking facilities shall be in all Segments.

b. Ground pads shall be in Segment 1 and 3.

c. Secondary Load Tap Changer (LTC) shall be in Segment 2 on the low voltage side.

19. Autotransformer Base Requirements:

a. The base shall be fabricated of flat plate steel of 1-inch minimum thickness or of adequately-sized channels. GRDA prefers the flat plate steel design. The edges of the base shall be rounded or sloped upward at an angle of approximately 45°.

b. The center of gravity of the autotransformer, as normally prepared for shipment, shall not fall outside the base support members for a tilt of the base of 15° from the horizontal, with or without oil in the autotransformer.

c. The base shall be designed for jacking, towing, and rolling and shipping in the directions of the centerlines of all Segments.

d. The base shall be designed to support the entire autotransformer, completely

assembled and oil filled, on piers located only under the outer one-foot of Segments 2 and 4. GRDA reserves the right to support this autotransformer with either a pier or a slab type foundation.

20. All gasketed joints shall have machined surfaces on both sides to assure even and effective pressure, to avoid overstressing gaskets, and to maintain oil tightness of joints under all service conditions. Joints shall be provided with gasket retainers and metal-to- metal stops. All gasketed joints on top of the autotransformer shall utilize flanges that are raised at least 3/4 inch above the cover surface.

All gaskets in contact with oil-bearing surfaces shall be nitrile butadiene synthetic rubber. Cork, in any form, is unacceptable as gasket material. Gasket joints shall be an overlapping, tapered type. Butt-jointed gaskets are not acceptable

Necessary gaskets shall be provided for the initial installation and assembly of the autotransformer. These gaskets shall be shipped with the autotransformer.

21. In addition to the initial set of gaskets, one complete set of spare gaskets for the complete autotransformer shall be provided and shipped in a separate container. Each gasket shall be labeled or identified with the appropriate use or installation location. These gaskets are for future use only and are in excess of those required for autotransformer assembly. A complete set of spare gaskets is defined as one gasket for each gasketed location of the autotransformer that is used to contain the insulating oil.

20. Manholes & Hand/Inspection Holes:

a. GRDA shall approve the number and location of manholes. The minimum dimension for round, oval, or rectangular manholes shall be 18.5 inches. A minimum of two manholes shall be provided in the tank cover.

b. Hand/inspection holes shall be provided to allow inspection and tightening of all mounting hardware, various tap changer items, all other bolted connections not accessible from manhole entrances, and all other miscellaneous bracing and mounting. The minimum dimension for round, oval, or rectangular hand/inspection holes shall be 12 inches.

c. All manholes and hand/inspection holes shall be bolted.

d. Each removable bolted cover, i.e., manholes, hand/inspection holes, etc. weighing more than 45 pounds shall be hinged, removable, and equipped with lifting eyes. Cover weighing 45 pounds or less shall have handles.

21. Lifting Facilities:

a. Four lifting hooks shall be provided and designed for lifting the completely dressed- out autotransformer with slings at a maximum angle of 30° with respect to the vertical axis.

b. Each lifting hook bearing surface shall be free from sharp edges, shall be chamfered, and shall have a hole with a minimum diameter of 2-inches for guying purposes.

22. There shall be two jack lugs in each autotransformer segment. Each jack lug shall have its centerline located within 1-foot of each segment corner. Each jack lug shall have its opening so designed that the lifting members of the jacks can be easily inserted. The 2- inch holes in the webbing above the jack pad itself are for attachment of winch lines for skidding of autotransformer and shall be designed for this purpose.

23. A bracket suitable for mounting a fall prevention safety device shall be provided in the approximate center of the tank cover. This bracket shall be capable supporting hardware including personnel harnesses utilizing gravity brakes.

24. A two-inch minimum pipe connection with sealing cap shall be provided for venting and located in the top cover.

E. COOLING EQUIPMENT

1. Radiators

a. The autotransformer radiators shall be removable. Valves shall be provided to allow removal and installation of radiators without lowering the oil level in the main tank. Radiator headers shall be provided with mounting flanges for bolting directly to the radiator shut-off valves mounted on the autotransformer. The radiator headers shall be provided with drain plugs at the bottom, vent plugs at the top, and lifting eyes.

b. If radiator manifolds are provided on the autotransformer, shut-off valves to the main tank, vent plugs, and drain valves must be provided for each manifold. Valves shall be of a type that does not leak around the operating stem. They shall be equipped with indicators which clearly show their position as open or closed and shall be arranged so they can be bolted in either the open or closed position. Packing-gland type valves will not be accepted.

c. Radiators shall be flushed prior to shipment to remove any welding slag or other foreign material.

d. Radiator flanges shall be sealed during shipment to prevent any moisture or foreign material from entering the radiators. Radiators shall be shipped filled with dry nitrogen.

e. Each removable radiator shall be provided with two lifting eyes with one each on the top and bottom lifting balance point or four eyes with two each on top and bottom.

f. Each removable radiator shall be provided with a brass ball valve at its lowest point for draining the radiator. The ball valve shall have a brass plug and the vent at the top shall have a steel inlet plug. Radiator drain valves shall have ¾ inch or 1-inch National Pipe Threads. Reducers are not allowed in conjunction with valves. These fittings will be used to flush/drain the entire radiator assembly.

g. All radiators shall be of suitable material, using welded or brazed construction. They shall be designed and braced to prevent undue vibration. X-bracing is required for each radiator bank, top and bottom. All radiators shall be capable of full vacuum filling.

h. All plugs shall have square heads and National pipe threads. Teflon tape shall be applied to all threaded parts prior to assembly.

i. If possible, GRDA would prefer that radiators not be located in Segment 4 below the tertiary bushings.

2. Fans

a. Fans shall be provided to facilitate full 65°C nameplate ratings at specified maximum ambient temperature. Fans shall be single phase, 240 volts AC. Each bank of fans shall be supplied through a separate breaker installed in the control cabinet. The failure of the first stage of cooling shall not inhibit the second stage from operating in accordance with the settings on the winding temperature gauge contacts.

b. The wiring diagram and schematics for the forced cooling equipment and other equipment shall be submitted to GRDA for approval before actual assembly is started. Tabular wiring diagrams are not acceptable.

c. Each Autotransformer shall have one additional fan per cooling stage in excess of the design requirements. NOTE: The heat run calculations cannot take advantage of this requirement for one additional fan per cooling stage. However, it should be included in the total auxiliary load for loss calculations.

d. Cooling fans shall have their rotating shafts in the horizontal position and mounted for cross-flow cooling.

e. All fan motors shall be totally enclosed, non-ventilated, with sealed, prelubricated ball bearings. Fans shall be rated for all-weather outdoor operation.

f. All fan motors shall have a power factor of 0.8 or better.

g. Each fan motor shall be provided with thermal overload devices.

h. Fans shall be of slow speed, 1140 RPM or less, high volume design for quiet operation.

i. Fans shall be fully accessible and designed so any individual fan can be easily removed without disturbing the operation of other fans.

j. Fans shall be dynamically balanced and operate without vibration.

k. Each fan shall have a flexible cable connection to a ring type disconnect.

l. Each fan shall be attached to a radiator and shall be adequately protected by a guard. Fan guards shall meet or exceed OSHA regulations.

m. Fan motors shall not be equipped with centrifugal switches.

n. The control circuit shall be wired so that upon the opening of a remote contact supplied by GRDA, all cooling equipment in that stage of fans shall be de-energized. This circuit shall be designed so that GRDA's connections and remote contact will be

subjected only to 120 volts, 60 Hertz, ac duty. The circuit shall be self-resetting when GRDA's remote contact is closed

o. The Bidder shall provide a switch for the selection of either cooling bank as the first forced cooling stage.

p. The 2nd stage of forced cooling shall be activated when the 1st stage of forced cooling is called for if the 1st stage forced cooling contactor does not operate.

F. OIL DRAIN AND FILTER VALVES

1. Each component or tank must be equipped with an oil drain valve, vent plug, mechanical pressure relief device, sudden-pressure device with auxiliary contacts, oil sampling valve, and provisions for upper and lower oil filtering connections.

2. All tank drain valves and upper filter press valves shall have 2-inch National Pipe Threads. Metric-cut threads are not acceptable. Reducers are not allowed in conjunction with valves. All valves shall be equipped with end plugs or caps.

3. All valves shall be ball-type, brass and shall not leak around their operating stems.

4. Each valve shall have a steel valve plug with a square head and Teflon tape applied to its threads. All other plugged locations shall also have a steel plug with a square head and Teflon tape applied to their threads. Each drain and upper filter press valve plug shall be equipped with a 3/8-inch sampling device. This device shall have 5/16 inch x 32 male threads and be equipped with a cap. The sampling device shall be installed in the end plugs.

5. A drain valve shall be located in the bottom of each oil-filled compartment to provide drainage within 1-inch or less of the bottom of the compartment.

6. Main Tank:

a. A combination drain and lower filter valve shall be provided for complete drainage of the oil to the bottom of the tank and for outlet to oil filtering equipment

b. An upper filter valve located below the 25°C liquid level shall be provided.

c. A 3-inch vacuum connection with a cap shall be provided on the top of the main tank for use during filling.

7. LTC and other compartments:

a. A combination drain and lower filter valve shall be provided for complete drainage of the oil to the bottom of the LTC and associated compartments and for outlet to oil filtering equipment.

b. A 2-inch upper filter valve shall be provided for each compartment.

c. A 2-inch or larger vent threaded opening with a plug shall be provided on the side, within the gas space, of each of the compartments.

G. GROUNDING

1. Each autotransformer shall be equipped with two ground pads, one each in the lower left corners (as you face the segment) of Segments 1 and 3.

2. All ground pads shall consist of copper-faced steel pads or stainless steel pads without copper facing. The minimum thickness of the copper facing shall be 0.015 inch. Pads shall have NEMA 2-hole spacing and drilling. Thread protection for the ground pads shall consist of a flanged cup of non-corrosive material suitable for press fitting into threaded openings.

3. The ground bus shall be installed up from the ground pads in Segments 1 and 3 to the top of the autotransformer. Ground bus shall make a complete loop around or on the outside edge of the autotransformer tank cover so that it is convenient and accessible for connection to all arrestors, the neutral bushing, and the potential transformer, if provided. The Bidder shall provide brackets to securely fasten the ground bus and associated leads to the autotransformer.

4. The ground bus shall cover both holes on each respective ground pad.

5. The Bidder shall furnish all connections from the neutral bushing to the ground bus and from the arrestors to the ground bus. These connections shall be removable for testing and replacement purposes.

6. All ground bus shall be solid copper bar with a minimum number of splices. The Bidder shall provide brackets to securely fasten the ground bus and associated leads to the autotransformer.

7. The ground bus components shall be removed before shipping, packed securely with all necessary fasteners and fittings into a wooden shipping crate, and shipped along with the other transformer accessories to avoid copper theft during shipment and transformer storage. Provide necessary drawings to show how the bus it to be reassembled in the field.

H. CORE AND COIL ASSEMBLY

1. The design shall be core form.

2. Core construction shall be a stepped, round type. Rectangular cores are not acceptable.

3. The core assembly shall have laminations made of “non-aging”, cold-rolled, grain oriented, highly permeable silicon alloy steel. Each lamination shall be covered with a high-resistance, inorganic coating to reduce eddy currents.

4. The core assembly shall be braced adequately to prevent displacement and distortion under all normal handling conditions including rail shipment and operation under maximum short circuit conditions. Core bolts shall not be used.

5. Cores shall be grounded at only one point and the core grounds for both the main and

series transformer shall be brought outside the tank to a convenient location for testing. Core ground points shall be accessible without opening the autotransformer tank. All hardware necessary for removing the ground lead for testing shall utilize captive hardware.

6. The autotransformer design shall be adequate to withstand short circuits, with the fault current limited only by the impedance of the autotransformer itself.

7. All windings shall be made of copper.

8. All joints in the winding shall be resistance brazed. Torch brazing is unacceptable.

9. Circular coil construction shall be used for the main windings and the series windings. The series windings shall use disc or helical windings. Rectangular coil construction on any winding or winding component is not acceptable. Layer windings are not acceptable.

10. Insulation material shall be of the thermal upgraded type and completely compatible system similar and equal to EHV Wiedmann board or ABB (Westinghouse) Insuldur and shall provide for operation of the autotransformer(s) at 65°C.

11. The insulating varnishes, and other associated compounds shall not contaminate the insulating oil nor shall the oil affect these items.

12. Radio influence shall meet the requirements of NEMA TR1, latest revision.

13. The current ratings of all leads shall provide adequate ampacity through the highest 65° C rating. The HoXo neutral lead shall not be sized smaller than X1lead. All leads shall also provide adequate current capacity for loading conditions described in ANSI C57.91- 1995.

14. Excitation: The autotransformer shall be capable of being over excited in accordance with ANSI C57.12.

15. Winding designs that utilize internal arresters and surge protection are not acceptable. If the design requires the use of internal arresters, it shall be indicated on the exceptions section of the bid sheet.

16. GRDA will Doble test the unit after field assembly and oil filling. The unit insulation must test at 0.5% power factor or less when corrected to 20°C.

I. BUSHINGS

1. The HV bushings shall be cover mounted in Segment 3.

2. The LV bushings shall be cover mounted in Segment 1.

3. The TV bushings shall be cover mounted in Segment 4.

4. The placement and spacing of the bushings are subject to GRDA's approval.

5. All bushings shall be oil-filled and shall be free of oil leakage. Bushings shall have suitable leak-proof sight gauges and a convenient means for sampling oil and draining the bushings at the mounting flange location.

6. All bushings shall have a shielded tap brought out for making ungrounded power factor tests.

7. All bushings shall be designed such that impulse voltage flashover occurs outside the tank before flashover occurs on the bushings inside the autotransformer.

8. The bushing ampere ratings shall provide adequate capacity through the 65°C ONAN/ONAF/ONAF rating continuously with a minimum 25% margin for emergency overload over an 8-hour period.

9. Each bushing shall have a power factor of 0.5% or less. A certified power factor test shall be provided for each bushing and shall include grounded and ungrounded specimen tests. All test values shall be corrected to 20°C. Factory bushing tests shall be forwarded with certified test results.

10. Each bushing shall be manufactured and tested by the bushing Bidder in accordance with the latest revision of ANSI C76.1. Test results shall be certified.

11. Acceptable bushings: ABB type "O+C" only. Approval data shall include, but not be limited to, outline drawing, Bidder, type, style, and catalog number.

12. Bushings shall be gray in color, shall be transformer breaker interchangeable (TBI), and shall have the following ratings and characteristics:

Service Voltage Bushing BIL Minimum Current KV KV Rating High Voltage 345 1175 1800 Low Voltage 138 650 3000 Tertiary 25 150 3000 Neutral 25 150 1200

13. Each bushing shall be supplied with a NEMA four-hole pad connector sized to fit the bushing stud. Connector shall be tin-plated copper or aluminum.

J. INSULATING OIL

1. All autotransformers shall be supplied with the necessary quantity of high quality Type II Naphthenic Insulating Oil.

2. The oil used in the manufacturing process and for filling the autotransformers shall be non-PCB dielectric fluid in accordance with the Federal Polychlorinated Biphenyl (PCB) Regulations 40 CFR761, dated May 31, 1979, or the latest revision thereof or superseding regulation. A certified copy of the gas chromatograph test results shall be sent to GRDA. The nameplate shall certify that the unit was filled with non-PCB oil at the time of manufacture.

3. Oil made from Gulf Coast Crude is preferable.

4. Acid refined oil is preferable if available.

5. The insulating oil shall have dielectric strength, low viscosity, and freedom from inorganic acids, alkali, and corrosive sulfur. The oil shall meet the requirements of ANSI/ASTM D-3487-1979. The oil, as received, shall have the following characteristics as a minimum:

Test ASTM Method Requirement Dielectric Breakdown, kV D1816 (0.04” gap) 20 min. Power Factor @ 100º C, % D924 0.3 max. Power Factor @ 25º C, % D924 0.05 max. Oxidation Inhibitor, %W 2,6 DBPC D2668 or D1473 0.3 max. Corrosive Sulphur D1275 Non-corrosive Water, ppm D1533 or D1315 20 max. Neut. No., MG KOH/G D974 0.025 max. Oxid. Stability, Min. D2112 195 min. Poly Chlorinated Biphenyls (PCB content) Gas Chromatograph None detected Analine Point, ºC D611 78 max. Color D1500 0.5 max. Flash Point, ºC D92 145 min. IFT @ 25º C, Dynes/CM D971 40 min. Pour Point, ºC D97 -40 max. Specific Gravity, 15/15 C D1298 0.91 max. Viscosity @ 37.8 ºC, Kinematic D445, D2161 11 max. Dielectric Breakdown, kV D877 30 min.

Bidder will utilize ANSI standard or Doble TOPS.

The above characteristics are not intended to restrict which refining process is used.

6. After installation in the autotransformer and before energization, GRDA will test the oil. Oil not testing satisfactorily will be rejected by GRDA and must be replaced with acceptable oil by the Bidder at no cost to GRDA. If GRDA’s’ schedule permits, the oil may be field dried or reconditioned at no cost to GRDA.

8. The Bidder is advised that GRDA will not open the autotransformer unless dry air is used; dry air, with maximum moisture content of 0.03% by weight, will be pumped through the space above the core and coils. The temperature of the dry air shall be 5° C to 10° C higher than the oil temperature in the autotransformer.

The autotransformer shall be equipped with the necessary piping and valves for use of dry air and nitrogen gas. The Bidder is to supply one gas bottle with an autotransformer and he shall also furnish a certificate of ownership in GRDA's name for the bottle.

K. PAINTING

1. All exterior and interior surfaces are to be thoroughly cleaned of dirt, mill scale, rust, and welding slag before painting.

2. Oil and grease are to be removed chemically before painting.

3. All exterior surfaces, regardless of when the paint is applied during the fabrication, must be given three coats of suitable transformer paint prior to shipment. All metal surfaces must have a primer coat applied prior to applying the intermediate and finish coats. The finish coat shall be Gloss Light Gray, ANSI #70.

4. The inside surfaces of the main tank and LTC compartment shall be cleaned and coated with white paint which will not disintegrate or act as a catalytic agent when in contact with the insulating oil and which will not in any way cause deterioration of the oil.

5. Radiators shall be painted using electrostatic application or they shall be hot-dipped galvanized. The Bidder shall state on the proposal whether the radiators are painted or galvanized.

6. The interior of all control cabinets shall be gloss white.

7. The tank cover shall be coated with a non-skid surface.

L. LOAD TAP CHANGING EQUIPMENT

1. Acceptable LTC Manufacturer: Reinhausen. Provide current LTC model comparable to M-I-1800-150 used on existing Westinghouse (S.O. ATM3020) single-phase units. LTC shall be suitable for Master/Slave parallel operation with existing units.

2. All taps above rated secondary voltage will be full capacity (131,666 kVA). All taps below the rated secondary voltage may be reduced kVA capacity but will be full rated current.

3. The load-tap changing equipment will provide a range of 12 tap steps each above and below nominal for a secondary voltage ranging from 158,700 to 117,300 volts when the autotransformer is operating at rated voltage. Each voltage step will provide a voltage change of approximately 1.25%.

4. A weatherproof, lockable, LTC operator cabinet shall be furnished for control equipment and for the tap changer drive equipment. The cabinet shall be equipped with a stainless steel, 3-point latching mechanism and a continuous stainless steel hinge.

5. The tap changer mechanism shall be provided with a hand crank for manual operation. A mounting for the hand crank shall be provided in the operator cabinet. An electrical interlock shall be provided which prevents electrical operation of the LTC motor while the hand crank is engaged.

6. Manual operation of the LTC shall be possible while the autotransformer is energized and carrying rated load current. An interlock shall be provided that blocks manual operation for the occurrence of a vacuum bottle failure (for LTC's with vacuum interruption only.)

7. The tap changer motor drive equipment shall include: an eye-level, mechanically driven position indicator with resettable drag hands, an operations counter, limit switches, circuit

breakers, and other required auxiliary devices, space heaters, lamps, and convenience outlet mounted in LTC operator cabinet. Dry contacts shall be provided at all LTC tap positions for remote indication of tap changer status.

8. The power supply used for motor drive, motor control, and related equipment shall be 120/240 volts AC single phase. The drive motor will be supplied through a separate circuit breaker and a loss-of-supply power relay shall be provided for the drive motor circuit. Similarly, the control and regulating relay circuitry shall be supplied through a separate circuit breaker with a loss-of- voltage relay provided.

9. If the control potential supply to the voltage control unit and/or transformer line drop compensator is de-energized, the tap changer mechanism shall be prevented from making further position changes and shall activate a non-grounded Form C contact wired to a terminal block for GRDA's alarm.

10. All operating parts in the LTC mechanism that are not oil immersed shall be made of rust resisting material. All bearings that are not oil immersed shall be the "Oil-Less" type.

M. AUTOTRANSFORMER CONTROL CABINET

1. GRDA will make all control wiring and auxiliary power connections in the control cabinet.

2. All control devices shall be housed in weatherproof cabinet equipped with sufficient heaters and breather vents to prevent moisture condensation and ensure satisfactory operation of the apparatus to -25°F. All vents shall be guarded to prevent the entrance of insects.

3. Heaters shall be equipped with a non-adjustable thermostat and a manual switch for disconnecting purposes. When heaters are mounted in a location that may be hazardous to operating personnel, they shall be provided with protective screens.

4. A weatherproof lockable control cabinet shall be furnished for all control equipment. The control cabinet shall be equipped with a stainless steel, 3-point latching mechanism and a continuous stainless steel hinge. Handle shall have provisions for locking including a 3/8" minimum diameter hole.

5. Control components shall not be located on any exterior door.

6. Approved terminal blocks shall be provided for terminating GRDA's incoming power supply, potential supply, SCADA control wiring, and alarm indication wires. Shorting type terminal blocks shall be provided for terminating all current transformer leads. All GRDA connections shall be terminated on terminal blocks located in the control cabinet.

7. High quality switches (switchboard type where applicable), auxiliary relays, contacts, and breakers shall be supplied for all control functions and shall be subject to approval by GRDA.

8. Control, alarm, indication, and CT leads shall exit the control cabinet in conduit and shall continue in conduit toward the end device as far as practical in order to provide

maximum protection to the wiring. Flexible conduit may be used at the end device.

9. Switches, contactors, breakers, and control devices mounted in the control cabinet shall be clearly identified with the drawing item nomenclature as well as the item name and control position.

10. Adequate space shall be provided for all terminal blocks and control equipment with a 40% expansion capability. The control cabinet dimensions are subject to GRDA's approval.

11. The exterior doors of the control cabinet must be mounted so that the centerline is no higher than 5' above the autotransformer base line.

12. An approved provision for GRDA's conduit connection shall be made in the bottom of the control cabinet.

13. A rack shall be provided for holding the instruction books and drawings.

14. The bottom of the control cabinet shall be no less than 26" above the autotransformer base

15. Cabinets shall have no overhang or protrusion within seven feet of the autotransformer base.

16. The tap changer control panel shall be located in the autotransformer control cabinet and shall include but not be limited to the following:

a. Individual power supply switches and main and branch circuit breakers.

b. Beckwith Model M-2001C (Comprehensive) solid-state LTC Control Unit (including adapter panel) installed with standard functions.

c. Beckwith Model M-0169A Current Transformer (only applicable if line drop compensator CT does not have a 0.2 A secondary).

d. The voltage regulating controls will include a back-up relay equal to Beckwith Electric Company model M0329B (or other protection) to prevent the mechanism from running to full buck or boost due to malfunction of normal controls.

e. Automatic-Manual switch. A two-position switch shall be provided to transfer the tap changer from automatic to manual control. This switch shall have one non- grounded Form C contact wired to a terminal block for GRDA's alarm (43T - Automatic/Manual Switch).

f. Raise-Lower switch.

g. Beckwith M-0115 or M-0127A equipment required for parallel operation by the cir- culating current method.

h. Remote-Local switch. A two-position switch shall be provided to transfer the tap changer from local to remote operation. This switch shall have one non-grounded

Form C contact wired to a terminal block for GRDA's alarm.

i. Remote Control and Step Indication: Wiring and devices as required for connection to GRDA's SCADA system for control (raise/lower) and step indication of LTC. Indication shall be obtained through a variable resistor employing 40 ohms per tap with suitable terminals for GRDA's connections.

j. An operations counter shall be provided to accumulate each individual tap change performed.

17. Cooling Equipment control devices to be located in the autotransformer control cabinet shall include but are not limited to the following:

a. Individual breakers and contactors for energizing each stage of fans.

b. Automatic-OFF-Manual control switch with an alarm for the “OFF” position.

c. ON-OFF control switch.

d. Main power supply and individual branch circuit breakers.

e. Selector switch for choosing either bank of fans as the first stage of cooling.

f. Undervoltage alarm for fans utilizing dry contacts for SCADA alarm for each bank of fans.

g. “Fan ON” auxiliary contacts for remote indication.

h. Fan controls shall be arranged so that GRDA's autotransformer lockout relay contacts can be connected to stop fans.

i. Cooling equipment shall be started in two selectable stages, in accordance with the Owner’s choice, from both the winding temperature and the liquid temperature gauges provided.

18. A lamp receptacle, a toggle switch for illumination, and a GFI-type, three-wire convenience duplex outlet shall be provided in each control cabinet. The lighting circuit and convenience outlet circuit shall each have an overcurrent automatic-trip air circuit breaker with manual reset.

N. CURRENT TRANSFORMERS

1. All wiring shall be provided for each of the current transformers. All leads from the current transformer shall be brought to the control cabinet and terminated on shorting type terminal blocks. Conductors from only one CT shall be terminated on each shorting type terminal block. All terminal blocks shall be properly and clearly marked to indicate the transformer and winding. The CT leads of each three-phase set shall all be grouped by sets.

2. Each high voltage bushing (345 KV) shall be equipped with four (4), relay-accuracy, 1200:5, multi-ratio, C800 Class, bushing current transformers.

3. Each low voltage bushing (138 KV) shall be equipped with three (3), relay-accuracy, 2000:5, multi-ratio, C800 Class, bushing current transformers.

4. One tertiary voltage bushing shall be equipped with one (1), relay-accuracy, 4000:5, multi-ratio, C400 Class, bushing current transformer.

5. The Ho-Xo bushing shall be equipped with one (1), relay-accuracy, 1200:5, multi-ratio, C400 Class bushing current transformers.

Location CT’s Per Ratio Class Bushing 345 kV (H1) 4 1200:5 C800 138 kV (X1) 3 2000:5 C800 13.2 kV (Y1) 1 4000:5 C400 Neutral 1 1200:5 C400

O. CONTROL WIRING

1. All control, CT, and alarm wiring shall be isolated from ground.

2. Alarm wiring shall not be smaller than No. 16 AWG, 20+strands. Control wiring shall be smaller than No. 14 AWG, stranded copper conductor or larger. Current transformer secondary leads shall be No. 12 AWG or larger. Control wire shall be NEC rated 75°C wet/dry and flame retardant, 60+strands, with 600-volt insulation. All wiring shall not propagate flame or serve as fuel and shall carry Underwriter's Laboratories listing "Self- Extinguishing Group I."

3. All control wiring shall be tagged with the wire code/number at both ends.

4. The insulation or insulation jacket of each insulated conductor in a multi-conductor cable shall be color-coded for identification.

5. All control wiring shall be terminated with ring-type compression terminals.

6. Control wiring terminal blocks shall have no more than two wires under each terminal screw, including ground studs.

7. Control wiring in each cabinet shall be terminated on 30-ampere terminal blocks, GE type EB-25 or approved equal, having washer head binding screw-type terminals, 10-32 threads, and molded one-piece construction.

8. Each current transformer lead shall terminate in a control cabinet on a shorting type terminal block rated for 30 amperes with washer head binding screw-type, 10-32 threads, terminals and molded one-piece construction, GE type EB-27 or equal. One shorting type terminal block shall be used per CT.

9. A three-pole power distribution block, Gould Shawmut Catalog Number 67043, shall be provided for the single phase and neutral AC input (Primary, 2-2/0 through #12;

Secondary, 6-#4 through #14; AL/CU connector).

10. An excess of 10% of terminal points shall be furnished for all control wiring. Excess termination points do not apply to AC power terminals.

11. All terminal blocks, studs, and wiring shall be readily accessible, and there shall be no "blind" or back-of-panel wiring.

12. Terminal blocks and studs shall not be mounted on the exterior doors, walls, or floor of any cabinet.

13. Wiring splices or parallel connectors shall not be made in transformer tank braces or in other non-accessible locations. Such connections shall be made at terminal blocks or readily accessible splice boxes.

14. All exposed wiring in each cabinet shall be formed with wiring neatly grouped in packs using wiring cleats, or bands, with groups substantially supported. GRDA will accept the use of Panduct or equal. A 4"-wide Panduct shall be furnished for GRDA connections. Banding or tying inside Panduct is not required.

15. Wiring across hinges shall be arranged so that any twisting shall occur in the longitudinal axis of the conductor rather than across the conductor. A one foot loop (2' of wire) shall be minimum dimension.

16. Conduits: All exterior wiring shall be in rigid or armored conduits. Secondary leads of current transformers shall not be in a common conduit with control wiring. All conduits shall be metallic and 1" or larger in diameter. Conduit fill shall be in accordance with National Electrical Code.

17. Alarm contacts shall be suitable for interrupting, at 250 volts maximum: a. 0.02 Ampere DC inductive load b. 0.20 Ampere DC non-inductive load. c. 2.5 Amperes AC non-inductive or inductive load.

18. All control and alarm fuses shall be of the NEC single element, non-renewable, cartridge type, time-delay curve Bussman ‘NON’ or equal.

19. Air circuit breakers shall be thermal-magnetic trip, ambient compensated elements in all phases.

20. Nameplates shall be installed on or near each device, in each control cabinet, describing the function of the device and bearing the same device number on the schematic and wiring diagrams. Passive devices such as terminal blocks shall be identified with nameplates. This identification shall be the same as that used on the schematic and wiring diagrams. Nameplates shall be made of laminated white and black phenolic plastic with the white on the outside. The lettering shall be engraved through the white outside layer so the letters appear black.

21. All AC electrical devices shall be designed for operation on a nominal 120 volt, 60 Hertz, single phase, alternating current, unless specified otherwise. The Bidder shall guarantee satisfactory operation when the equipment is continuously energized at any voltage from

95 to 135 volts AC. Equipment required for operation at other nominal voltages shall be guaranteed to operate satisfactorily over proportional voltage variations. The dropout voltage shall be less than 75 volts for relays and 90 volts for contactors and starters.

22. All DC electrical devices shall be designed for continuous operation on an ungrounded station battery that will float on a trickle charge at 132 volts for 60 cell batteries. The Bidder shall guarantee satisfactory operation when the equipment is continuously energized at any voltages from 100 to 144 volts for a 60 cell battery. Electrical devices served from this supply shall not impose any ground connections upon it.

23. All AC and DC devices shall be guaranteed to operate satisfactorily under the voltage conditions specified above and at 50°C ambient temperature.

24. All accessories and features normally furnished shall be included.

P. SURGE ARRESTERS

1. Surge arrestors shall be furnished and mounted on appropriate removable brackets for all voltages where roof mounted bushings are provided.

2. Surge arrestors shall be the metal-oxide, gapless type and shall conform to ANSI and NEMA Standards as manufactured by GE, Ohio-Brass, or ABB. All surge arrestors shall be station class, polymer type.

3. Arrestor ratings shall be as follows: Operating Voltage Duty Cycle MCOV Rating 345 kV 258 kV 209 kV 138 kV 108 kV 84 kV 13.2 kV delta 15 kV 12.7 kV

4. A copper ground bus shall be provided for all of the arresters. This ground bus shall loop up one side of the autotransformer and be brought down the opposite side to separate tank ground pads and shall provide the ground for all arresters and the autotransformer neutral connection.

Q. AUTOTRANSFORMER ACCESSORIES

In addition to all standard accessories, the autotransformer shall be furnished with a minimum of the following items. Note that all gauges and pressure relays shall be manufactured by Qualitrol Corp. No substitutions.

1. No-Load Tap Changer – None required.

2. One magnetic liquid level indicator for each separate oil compartment or tank with low- level alarm contacts. Each gauge shall have two (2), non-grounded, Form C contacts wired to terminal blocks in the control cabinet for GRDA's alarms. Leads and contacts shall be ungrounded and rated for use on 125 volts DC or 250 volts AC. Liquid level gauges shall be mounted at oil level heights.

3. One dial-type liquid thermometer with resettable maximum indicating hand for each separate oil compartment containing heat-producing components. (No thermometer is

required in the LTC switch compartment.) The gauge(s) shall be mounted at eye level. Each thermometer shall have three (3), electrically-separate, separately adjustable, non- grounded Form C contacts wired to terminal blocks in the control cabinet. The thermometer shall be capillary tube type and the capillary tube shall be enclosed in conduit or other suitable protective device. Contacts and leads shall be ungrounded and rated for use on 125 volt DC or 250 volts AC.

The contacts shall activate the first and second stages of cooling fans and shall be in parallel with similar contacts in the hot spot thermometer. The third contact is for GRDA's alarm circuitry. Each contact shall be adjustable between 20°C and 160°C.

a. The 1st contact shall be used to activate the 1st stage of forced cooling, factory set at 60°C. This contact shall be in parallel with similar contacts in the hot spot thermometer.

b. The 2nd contact shall be used to activate the 2nd stage of forced cooling, factory set at 70°C. This contact shall be in parallel with similar contacts in the hot spot thermometer.

c. The 3rd contact shall be for GRDA's use, factory set at 80°C.

4. Dial type hot spot thermometers shall be provided for the high voltage and low voltage windings to indicate the hot spot temperature of each respective winding. The gauges shall be mounted at eye level and have a resettable maximum indicating hand. The temperature indication shall be obtained from CT's mounted inside the autotransformer. Each thermometer shall have three (3), electrically-separate, separately adjustable, non- grounded Form C contacts wired to a terminal block for providing remote indication of high temperature. The thermometers shall be capillary tube type and the tube shall be enclosed in conduit or other suitable protective device. Contacts and leads shall be ungrounded and rated for use on 125 volts DC or 250 volts ac.

a. Each contact shall be adjustable between 20°C and 160°C.

1) The 1st contact shall be used to activate the 1st stage of forced cooling, factory set at 65°C. This contact shall be in parallel with similar contacts in the hot oil thermometer.

2) The 2nd contact shall be used to activate the 2nd stage of forced cooling, factory set at 75°C. This contact shall be in parallel with similar contacts in the hot oil thermometer.

3) The 3rd contact shall be for GRDA's use, factory set at 105°C.

b. Each thermometer shall be in a different phase.

c. Each CT used for hot spot indication shall have its leads routed to the control cabinet and terminated on CT type shorting terminal blocks.

5. All thermometers shall be mounted between 54" and 72" above the autotransformer base.

6. Pressure-vacuum gauge for the main tank with 3-1/2" dial, 1/2 lb. graduations and plus or

minus 10 psi scale range. Gauge shall be mounted in the nitrogen cabinet and shall be provided with adjustable low and high pressure ungrounded alarm contacts rated for 125 volts DC or 250 volts AC.

7. A GRDA approved under-oil, sudden pressure relay designed to operate on sudden abnormal change of pressure inside the autotransformer due to an internal fault shall be provided on the main tank. The relay shall be provided with separate alarm and trip contacts and reset relay suitable for 125 volts DC or 250 volts AC, but will be operated from a 125 volts DC source. Splices in sudden pressure relay connecting cables, if required, shall only be made on approved terminal boards with approved mounting. Drawings shall indicate that relay must be removed during vacuum operations if this requirement exists.

Each sudden pressure relay shall be furnished as follows:

a. Primary element which shall operate on pressure increase if 0.5 psi/sec. or greater and shall not operate for gradual pressure changes, from surges, vibrations, mechanical shock, external short circuits, etc.

b. Auxiliary relay that will operate and seal in through a reset push button following operation of the primary element.

c. An "A" contact capable of carrying 20 amps DC trip current and a form "C" contact for alarm wired to terminal blocks from the auxiliary relay.

d. Auxiliary reset push button.

8. Gas Accumulator Relay (Buchholz Relay): If a conservator tank system is used for the autotransformer, a gas accumulator relay is to be provided.

a. The gas accumulator relay contact shall operate with an accumulation of 200 cm3 to 300 cm3 of gas. b. The gas accumulator relay shall also have a low oil level contact and a sudden oil pressure contact. c. Leads and contacts shall be ungrounded and rated for use on 125 volts DC or 250 volts AC. d. The gas accumulator and low oil level contacts shall both be “A” contacts wired to terminal blocks. e. The sudden oil-pressure contact shall be an “A” contact that operates an auxiliary relay that will seal in through a reset push button. The auxiliary relay shall be capable of carrying 20 amps DC trip current. An additional auxiliary relay contact shall also be wired to terminal blocks for an alarm. f. If a gas accumulator relay is installed, the under-oil sudden pressure relay described in Item #7 above may be deleted.

9. Oil Preservation System – Inert Gas Pressure

a. The combustible gas sampling lines shall be equipped with a test valve and so arranged that a Fyrite oxygen Analyzer, or equivalent, can be conveniently attached.

b. The combustible gas sampling line shall be brought down from the top gas space in

the main tank, not from any other place, and shall terminate at a point approximately 5' above the autotransformer base.

c Each sealed gas space shall have purging inlet and outlet lines remotely located from each other for efficient purging. The line shall terminate approximately 5' above the autotransformer base and be equipped with a valve.

d. Inert-Gas Pressure: The inert-gas equipment shall have a high-pressure valve and a gauge equipped with one (1) non-grounded, Form C contact wired to a terminal block for GRDA's alarm. Alarm contact shall be activated when the cylinder pressure drops to approximately 200 psi, to indicate pressure and approximate quantity of gas in the cylinder.

The gas pressure system shall be equipped with the following:

1) A two-stage pressure-reducing valve set at the factory to maintain a desirable minimum pressure of 1 psi or less.

2) A suitable relief valve which discharges at +5 psi.

3) Valves and by-passes for checking setting of regulator and relief valves.

4) Mechanical self-resetting pressure relief device on the cover of main tank, LTC, and any oil filled compartments. Each device shall have a mechanical indicator which is visible from the base of the autotransformer and shall have two (2) non- grounded, Form C contacts and leads rated for use on 125 volts DC or 250 volts AC wired to terminal blocks in the control cabinet for GRDA's use. This device shall have a range of 10-15 psi factory set at 10 psi.

III. WARRANTY

A. The Bidder’s warranty shall extend eighteen (18) months from date of energization or twenty- four (24) months from date of receipt by GRDA, whichever time is shorter.

B. The Bidder 's extended warranty on all or any part of the unit and any associated warranty related to the autotransformer movement, reimbursable in and out costs, and other arrangements associated with an extended warranty will receive acknowledgment on bid evaluation.

C. The Manufacturer is advised that written notification concerning assembly will not supersede the Manufacturer’s published installation procedures in the event that any deviation from those published procedures is made by the Manufacturer’s Service Engineer/Representative. (Published Procedure Rule.)

IV. FIELD REPRESENTATIVE SERVICES AND WARRANTY INITIATION

A. The Manufacturer shall furnish the services of a qualified person to inspect the autotransformer upon arrival and prior to unloading. The Manufacturer shall furnish the services of a factory trained, qualified, and experienced Field Engineer to assist the Owner or his authorized representatives in supervising the assembly of the complete autotransformer and make the necessary tests prior to energization.

B. The Bidder shall deliver the unit to the transformer pad. GRDA shall provide labor and equipment to reassemble the autotransformer. However, the Manufacturer will be held responsible for the proper installation insofar as the Manufacturer’s responsibility is concerned. The Manufacturer’s responsibility includes the following:

1. Inspection on delivery.

2. Supervise and be responsible for the procedures used in delivery to the transformer pad.

3. Supervise assembly and field testing.

4. Certify in writing that all equipment was installed in accordance with Manufacturer’s requirements.

C. The Manufacturer is advised that the autotransformer will be kept under dry air beginning with inspection upon delivery and ending when field assembly is completed. Field assembly shall be accomplished under strict adherence to Manufacturer published instructions and to provisions included herein. Deviations will not be permitted unless authorized and bonded by the Manufacturer.

D. The autotransformer's core and coil, no load tap changing switches and mechanism, and all mountings and bracings shall be visually inspected by the Service Engineer prior to installing insulating oil. Dry air shall be used to purge the main tank prior to entering and exhausted into the tank during the inspection period. The allowable "open" time with respect to percent relative humidity shall be as defined by Manufacturer’s procedures.

E. The Owner will furnish all dry air and nitrogen as required and will be responsible for obtaining the bottles and their return. Each autotransformer shall be equipped with the necessary piping and valves for use of dry air and nitrogen gas.

F. The Manufacturer shall provide personnel who are qualified in servicing and placing into operation the Manufacturer‘s specific type and class of equipment furnished.

G. The Manufacturer shall include as a part of the bid price, the services of a Field Service Engineer to perform the inspection and supervisory services specified, including whatever number of trips are required to the job site to complete the erection and placing in-service. Personnel furnished by the Manufacturer shall be satisfactory to the Owner and his authorized representatives, or they shall be replaced with personnel who are satisfactory, without additional charge.

H. The Manufacturer shall, in addition to the above, include as a part of the bid price, all insurance, transportation, and subsistence costs of the Service Engineer. The Field Service Engineer will not be required to work on Sundays. The Owner will not make payment to the Manufacturer for any work required on the part of the Service Engineer in excess of 8 hours per day or 40 hours per week.

I. The Owner represents that all construction work will be accomplished in a prompt and efficient manner; however, this does not preclude overtime work.

J. The Manufacturer shall promptly correct all wiring and other errors in these autotransformers

discovered in the field at no cost to the Owner.

K. Manufacturer’s service representative shall be fluent with the English language.

L. The Manufacturer‘s service personnel shall follow these procedures to keep records of activities while at the project site:

1. Upon arrival at each project site, the serviceman shall make his presence known to the Owner and the Resident Engineer and supply them with the following information: i. Name ii. Company iii. Local Address and Phone Number iv. Service he is to Perform

2. The serviceman shall give the Owner/Resident Engineer a written daily report of the work performed. He shall clear with the Owner/Resident Engineer for any period he plans to leave the project site for other than normal time off, and advise as to where he or a replacement can be reached in the event of an emergency.

3. Upon completion of his work, the service man shall clear with the Owner/Resident Engineer to satisfy him the work is completed and adequate information on where he can be reached for emergencies or when additional service might be required. Additionally, he shall give the Owner/Resident Engineer a detailed report of the work performed before leaving job site.

4. Upon completion of each service period at each project site, the Manufacturer's serviceman shall sign the Owner's Transformer Inspection and Data Report For Receiving and Installation to insure a record of work actually performed.

V. EXCEPTIONS

A. Any exceptions to this contract/specification shall be clearly set forth in the Bidder's initial proposal and specifically identified as exceptions. Comments shall be clearly separated from exceptions.

B. Should any ambiguities occur within these specifications, the Bidder shall request a clarification before submitting a bid. GRDA will notify all Bidders of any ambiguities brought to his attention before the bid due date.

VI. DESIGN/MANUFACTURING CHANGES

The Bidder shall keep GRDA informed when quoting and before construction, of any major design or manufacturing changes to be made on this autotransformer that varies from an established design previously furnished.

VII. MANUFACTURING ERRORS

All equipment and materials shall be complete in all respects and unless stated in writing by the Bidder and accepted by GRDA, no exceptions to this contract and specification will be accepted. Any manufacturing errors required to be corrected in the field shall be performed by the Bidder at

his expense; or if done by GRDA, the cost of the same shall be borne by the Bidder.

Likewise, if any part of this autotransformer is not in conformance to this specification, corrections necessary for compliance to this specification shall be performed by the Bidder at his expense; or if performed by GRDA, the cost of same shall be borne by the Bidder.

VIII. PAYMENT AND BONDING

A. GRDA will make payment in full of the total quoted bid price for the autotransformer and any optional items only after the autotransformer has been delivered FOB to the specified location, reassembled, filled with oil, and verified as meeting the specifications.

B. Should the Bidder require advanced prepayments via a payment schedule linked to the autotransformer production schedule, material acquisition, or any other manufacturing landmarks, GRDA requires that the Bidder provide a Supply Contract Bond or Letter of Credit in the amount of the total cost of the autotransformer. The costs of such bond or letter of credit shall be listed in the bid as a separate line item. The Supply Contract Bond shall be of the form listed in Appendix A of these specifications. The bond must be issued by a surety authorized to do business in Oklahoma and the surety company must also be listed in Federal Circular 570. The Federal Circular may be found at http://www.fms.treas.gov/C570/c570_a-z.html

C. Bidders who accept the total payment for the autotransformer after receipt of the unit by GRDA do not need to provide a Supply Contract Bond or Letter of Credit.

IX. COMPATIBILITY WITH EXISTING SINGLE-PHASE UNITS

Because this autotransformer will serve as a spare (4th Unit) for an existing three-phase bank installation, it is required to be both electrically and physically compatible with the existing single-phase units manufactured by Westinghouse Electric Corporation (S.O. ATM3020). Documentation for the existing units is included within Appendix B for reference. GRDA will evaluate compatibility of Bidder’s proposal with existing units based on, but not limited to, the following:

1. Impedance within +/- 5% of the following:

H-X H-Y X-Y 7.24% at 70 MVA 13.38% at 15 MVA 15.11% at 15 MVA

2. Overall width (max) of 20’-11” (with control cabinet door open).

3. Overall depth (max) of 26’-3” (edge of radiator to edge of secondary LA stand).

4. Overall height (max) of 30’-5” (top of 345 kV LA), and 27’-3” (top of H1 bushing)

5. Base dimensions (max) of 15’-6” W by 12’-6” D (Existing pad 16’-0”W by 14’-0”D)

6. Total installed weight (max) of 273,000 lbs.

(End) 07/24/15

46 Appendix A SUPPLY CONTRACT BOND

BOND NUMBER: KNOW ALL MEN BY THESE PRESENTS,

That, as Principal, and organized and existing under the laws of the State of , with an office at , as Surety, are held and firmly bound unto (hereinafter called the Obligee), in the just and full sum of ($ ) Dollars, to the payment of which sum well and truly to be made, the said Principal and Surety bind themselves, and their respective heirs, administrators, executors, successors and assigns, jointly and severally, firmly by these presents.

WHEREAS, the Principal has entered into a certain written contract with the Obligee, dated , 2015, which contract is hereby referred to and made a part hereof as fully and to the same extent as if copied at length herein.

NOW, THEREFORE, the condition of this obligation is such that, if Principal shall faithfully perform the contract on his part, and shall fully indemnify and save harmless the Obligee from all costs and damage which the Obligee may suffer by reason of failure so to do and shall fully reimburse and repay the Obligee all outlay and expense which the Obligee may incur in making good any such default, then this obligation shall be null and void, otherwise it shall remain in full force and effect. Provided that in no event shall the liability of the Surety exceed the penal sum of this bond.

PROVIDED, HOWEVER, it shall be a condition precedent to any right of recovery hereunder that, in the event of any default on the part of the Principal, a written statement of the particular facts showing the date and nature of such default shall be given by the Obligee to the Surety within a reasonable time after such default but in no event exceeding thirty (30) days thereafter, and such statement shall be forwarded by registered mail to the Surety at .

AND PROVIDED FURTHER, that no action, suit or proceeding, except as hereinafter set forth, shall be had or maintained against the Surety on this instrument unless the same be brought or instituted and process served upon the Surety within twelve months after completion of the work mentioned in said contract, whether such work be completed by the Principal, Surety, or Obligee; but if there is any maintenance or guarantee period provided in the contract for which said Surety is liable, no action, suit or proceeding for maintenance or guarantee shall be brought after six months from the expiration of the maintenance or guarantee period.

Sealed with our seals and dated this day of , 2015.

Principal: (Witness) (Seal)

By:

Attest: Surety:

By:

Appendix B Documentation for Westinghouse Electric Corporation (S.O. ATM3020)

Document Description ATM3020-01 (1 of 4) Existing Unit Equipment Listing ATM3020-01 (2 of 4) Existing Unit Plan View Dimensions ATM3020-01 (3 of 4) Existing Unit Elevation View Dimensions ATM3020-01 (4 of 4) Existing Unit Elevation View Shipping Dimensions ATM3020-04 (1 of 3) Existing Unit Controls – Sheet 1 ATM3020-04 (2 of 3) Existing Unit Controls – Sheet 2 ATM3020-04 (3 of 3) Existing Unit Controls – Sheet 3 ATM3020-10 Instruction Nameplate (1 of 2) ATM3020-11 Instruction Nameplate (2 of 2) ATM3020-13 Paralleling Diagram for Bank Synchronism Report (Dated 3-31-1989) Factory Test Report (18 pages)