Amend_0001_18R0012_HLD_SS_Transformers.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

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

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

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

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

FAR (48 CFR) 53.243

Ice Harbor Station Transformers TJO and TWO Replacement

The purpose of this amendment is to incorporate the reivisons outlined below . The proposl submission date remains unchanged.

1. CONTRACT ID CODE PAGE OF PAGES

1 3

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

16C. DATE SIGNED

BY 06-Mar-2018

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

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

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W912EF18R0012

X 9B. DATED (SEE ITEM 11)

27-Feb-2018

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

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

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

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

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

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

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

CONTRACT ORDER NO. IN ITEM 10A.

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

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

D. OTHER (Specify type of modification and authority)

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

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

10A. MOD. OF CONTRACT/ORDER NO.

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

6. ISSUED BY

3. EFFECTIVE DATE

06-Mar-2018

CODE

USAED, WALLA WALLA - CONTRACTING DIV.

HILLARY A. MORGAN

201 N. THIRD AVENUE

WALLA WALLA WA 99362

W912EF 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912EF18R0012

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

Summary of changes for Amend -0001 Ice Harbor Station Service Transformers TJO and TWO Replacement

W912EF18R0012

1. Revised the following Specifications:

a. SECTION 00 01 15.00 28, LIST OF DRAWINGS

• Revised the following paragraphs:

o 1.2, CONTRACT DRAWINGS o 1.3, FOR INFORMATION ONLY DRAWINGS (FIO)

b. SECTION 48 19 23.01 26, 5000/6250 KVA CLASS I POWER TRANSFORMER

• Revised the following paragraphs:

o 2.11.7.2, “Load Tap Changer Motor Drive Enclosure and Controls” o 2.19.3, “Device Nameplates” o 2.19.4, “Additional Transformer Identification” o 3.3.8, “Impulse Tests”

c. SECTION 48 19 23.02 26, 5000/6250 KVA CLASS II POWER TRANSFORMER

• Revised the following paragraphs:

o 2.19.3, “Device Nameplates” o 2.19.4, “Additional Transformer Identification” o 3.3.8, “Impulse Tests”

See revised specification for details.

2. Revised the following Drawings (See clouded areas).

a. SHEET G-006

b. SHEET G-007

c. SHEET FIO-054

d. SHEET FIO-055

e. SHEET FIO-056

f. SHEET FIO-057

(End of Summary of Changes)

Ice Harbor Station Service Transformers TJO and TWO Replacement W912EF18R0012 Amend-0001

SECTION TABLE OF CONTENTS

DIVISION 00 - PROCUREMENT AND CONTRACTING REQUIREMENTS

SECTION 00 01 15.00 28

LIST OF DRAWINGS

PART 1 GENERAL

1.1 SUMMARY

1.2 CONTRACT DRAWINGS

1.2.1 Use Of Government Prepared Contract CAD Electronic Files

1.3 FOR INFORMATION ONLY DRAWINGS (FIO)

-- End of Section Table of Contents --

DOCUMENT 00 01 15.00 28

G4EDHCMP

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SECTION 00 01 15.00 28

LIST OF DRAWINGS

PART 1 GENERAL

1.1 SUMMARY

This section lists the drawings for the project pursuant to contract clause "DFARS 252.236-7001, Contract Drawings, Maps and Specifications."

1.2 CONTRACT DRAWINGS

Contract drawings are as follows:

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

GENERAL

IHP-1.28-0-0/1 G-001 PROJECT LOCATION AND VICINITY

MAPS

IHP-1.28-0-0/2 G-002 INDEX OF DRAWINGS

IHP-1.28-0-0/3 G-003 POWERHOUSE GENERAL PLAN EL

368.5

IHP-1.28-0-0/4 G-004 WORK LOCATION EL 368.5

IHP-1.28-0-0/5 G-005 GENERAL PLAN EL 353.5

IHP-1.28-0-0/6 G-006 TJO 5000KVA STATION SERVICE -

TRANSFORMER REQUIREMENTS -

SUMMARY SHEET

1 3/05/2018

IHP-1.28-0-0/7 G-007 TWO 5000KVA STATION SERVICE -

TRANSFORMER REQUIREMENTS -

SUMMARY SHEET

1 3/05/2018

STRUCTURAL INSTALLATION

IHP1.28-5-0/2 S-101 SEPARABLE STEEL FOUNDATION -

DETAIL - INSTALL

MECHANICAL DEMOLITION

IHP-1.28-3-9/1 MD501 TRANSFORMER - CIRCUIT BREAKER

- DELUGE SYSTEM - SECTIONS -

REMOVAL

MECHANICAL INSTALLATION

DOCUMENT 00 01 15.00 28

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

IHP1.28-3-9/2 M-501 TRANSFORMER - CIRCUIT BREAKER

- DELUGE SYSTEM - SECTIONS -

INSTALL

ELECTRICAL DEMOLITION

IHP1.28-6-1E6/1 ED101 TJO PLAN AND ELEVATION -

REMOVAL

IHP1.28-6-1F5/1 ED102 TWO PLAN AND ELEVATION -

REMOVAL

IHP1.28-6-1D4/1 ED207 SO3 + SOR3 ELEVATION REMOTE

LTC - INDICATION AND XFMR

LOCK OUTS REMOVAL

IHP1.28-6-1A21/1 ED601 MAIN ONE-LINE - REMOVAL

IHP1.28-6-1A21/2 ED602 CQ11 AND CQ21 - ONE-LINE -

REMOVAL

IHP1.28-6-9A24/1 ED603 TJO + TWO XFMR LOCKOUT -

CONTROL DIAGRAM - REMOVAL

IHP1.28-6-9D24/1 ED604 XJO BREAKER CONTROL DIAGRAM -

REMOVAL

IHP1.28-6-9D24/2 ED605 XWO BREAKER CONTROL DIAGRAM -

REMOVAL

IHP1.28-6-9D24/3 ED606 XP116 & XP216 - BREAKER

CONTROL DIAGRAM - REMOVAL

IHP1.28-6-9D24/4 ED607 XP121 BREAKERS CONTROL DIAGRAM

- REMOVAL

IHP1.28-6-9D24/5 ED608 XP221 BREAKER CONTROL DIAGRAM

- REMOVAL

IHP1.28-6-1D54/1 ED701 SO3 WIRING DIAGRAM - REMOVAL

IHP1.28-6-1D54/2 ED702 SOR3 WIRING DIAGRAM - REMOVAL

IHP1.28-6-1A1/1 ED703 SOR3 WIRING DIAGRAM - REMOVAL

IHP-X.XX-0-0/2 ED801 TJO & TWO REPLACMENT - CONDUIT

AND CABLE SCHEDULE - REMOVAL

ELECTRICAL INSTALLATION

IHP1.28-6-1A0/1 E-001 NOTES AND LEGEND - INSTALL

IHP1.28-6-1E6/2 E-101 TJO PLAN - INSTALL

IHP1.28-6-1F5/2 E-102 TWO PLAN - INSTALL

DOCUMENT 00 01 15.00 28

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

IHP1.28-6-1E1/1 E-103 PLAN EL 368.5 EXISTING

EMBEDDED - CONDUIT AND GROUND

- TJO - INSTALL

IHP1.28-6-1F1/1 E-104 PLAN EL 368.5 EXISTING

EMBEDDED - CONDUIT AND GROUND

- TWO - INSTALL

IHP1.28-6-1F1/2 E-105 PLAN BAYS 3-5 CONDUIT & CABLE

- ROUTING TO TJO & TWO EL 353

- INSTALL

IHP1.28-6-1E1/2 E-106 PLAN BAYS 1 & 2 CONDUIT &

CABLE - ROUTING TO TJO AND TWO

EL 353 - INSTALL

IHP1.28-6-1E6/3 E-201 TJO ELEVATION - INSTALL

IHP1.28-6-1F5/3 E-202 TWO ELEVATION - INSTALL

IHP1.28-6-1E6/4 E-203 TJO LAYOUT SHT 1 - INSTALL

IHP1.28-6-1E6/5 E-204 TJO LAYOUT SHT 2 - INSTALL

IHP1.28-6-1F5/4 E-205 TWO LAYOUT SHT 1 - INSTALL

IHP1.28-6-1F5/5 E-206 TWO LAYOUT SHT 2 - INSTALL

IHP1.28-6-1D4/2 E-207 SO3 + SOR3 ELEVATION REMOTE

LTC - IND AND XFMR LOCK-OUTS -

INSTALL

IHP1.28-6-1A3/1 E-501 TJO & TWO POWER AND - CONTROL

CABINET DETAILS - INSTALL

IHP1.28-6-1A3/2 E-502 TJO & TWO POWER AND CONTROL

CABINET - ELEVATION - INSTALL

IHP1.28-6-1E6/6 E-503 TJO SURGE ARRESTOR / - SURGE

CAPACITOR DETAILS - INSTALL

IHP1.28-6-1A21/3 E-601 MAIN ONE-LINE - INSTALL

IHP1.28-6-1A21/4 E-602 CQ11 AND CQ21 - ONE LINE

DIAGRAM - INSTALL

IHP1.28-6-9A24/2 E-603 TJO + TWO XFMR LOCKOUT -

CONTROL - INSTALL

IHP1.28-6-9A24/6 E-604 XJO BREAKER CONTROL DIAGRAM -

INSTALL

IHP1.28-6-9D24/7 E-605 XWO BREAKER CONTROL DIAGRAM -

INSTALL

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

IHP1.28-6-9D24/8 E-606 XP116 & XP216 BREAKER CONTROL

DIAGRAM - INSTALL

IHP1.28-6-9D24/9 E-607 XP121 BREAKERS CONTROL

SCHEMATIC - INSTALL

IHP1.28-6-9D24/10E-608 XP221 BREAKER CONTROL DIAGRAM

- INSTALL

IHP1.28-6-9A24/3 E-609 TJO & TWO 125V DC - CONTROL

DIAGRAM - INSTALL

IHP1.28-6-9A24/4 E-610 TJO & TWO COOLING - CONTROL

DIAGRAM - INSTALL

IHP1.28-6-9A24/5 E-611 TJO & TWO 120/240V AC -

CONTROL DIAGRAM - INSTALL

IHP1.28-6-9A24/5 E-612 LOCAL ANNUNCIATION - INSTALL

IHP1.28-6-1D54/1 E-701 SO3 WIRING DIAGRAM - INSTALL

IHP1.28-6-1D54/2 E-702 SOR3 WIRING DIAGRAM - INSTALL

IHP1.28-6-1A1/1 E-703 SOR3 WIRING DIAGRAM - INSTALL

IHP1.28-6-1A51/1 E-704 TJO & TWO TERMINAL BOX -

WIRING DIAGRAM - INSTALL

IHP-X.XX-0-0/2 E-801 TJO & TWO REPLACMENT - CONDUIT

AND CABLE SCHEDULE - INSTALL

1.2.1 Use Of Government Prepared Contract CAD Electronic Files

a. Contract CAD drawing files requests by the Contractor will be granted only when the Contractor is planning to use the electronic CAD files for creating shop drawings.

b. No For Information Only drawings are available on CAD.

c. The Contractor assumes all risks associated in using electronic CAD drawings.

d. Electronic copies of CAD drawings are only available in Bentley MicroStation format.

e. The contract drawings shall govern if there are any discrepancies between the electronic copy and the contract drawing. The Contractor shall promptly notify the Contracting Officer of any discrepancies.

The Government will not be responsible to correct the electronic CAD drawing.

1.3 FOR INFORMATION ONLY DRAWINGS (FIO)

These FIO drawings are included with the drawings for information. The Government does not warrant the accuracy of the FIO drawings. The Government recommends that the Contractor verify the accuracy of FIO drawings.

FIO drawings are as follows:

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

802012 FIO-001 ITE 1200A NON-SEGREGATED -

PHASE BUS 13.8KV - -

SECTIONAL ELEVATIONS

802013 FIO-002 ITE 1200A NON-SEGREGATED -

PHASE BUS 13.8KV - -

SECTIONAL PLAN VIEW

834724 FIO-003 ITE HORZONTAL TRANSFORMER -

CONNECTION (STATION SERVICE -

TRASNFORMER UNIT #1

379D529 FIO-004 GENERAL ELECTRIC - OUTLINE

DRAWING FOR TJO

581E292 FIO-005 GENERAL ELECTRIC - OUTLINE

DRAWING FOR - TWO

676D189 FIO-006 WESTINGHOUSE HIGH VOLTAGE -

METAL CLAD SWITCHGEAR - -

OUTDOOR BUS DUCT 5KV

676D190 FIO-007 WESTINGHOUSE HIGH - VOLTAG

METAL CLAD SWGR - - OUTDOOR

BUS DUCT - TWO

D-20913 FIO-008 WIRING DIAGRAM FRON PANEL SO3

N/A FIO-009 TJO & TWO XFMR - LOCKOUT

CONTROL DIAGRAM

IHP-1.1-0-1/1 FIO-010 POWERHOUSE COMPLETION -

CONTRACT VOLUME I INDEX - TO

DRAWINGS

IHP-1.1-0-1/2 FIO-011 POWERHOUSE COMPLETION -

CONTRACT VOLUME I INDEX - TO

DRAWINGS

IHP-1.1-4-2/12 FIO-012 POWERHOUSE - CONCRETE OUTLINE

- GENERATOR BAYS - PLAN EL

349.50

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

IHP-1.1-4-2/13 FIO-013 POWERHOUSE - CONCRETE OUTLINE

- GENERATOR BAYS - SECTIONS

EL 349.50

IHP-1.1-4-2/15 FIO-014 POWERHOUSE - CONCRETE OUTLINE

- GENERATOR BAYS PLAN - EL

368.50

IHP-1.1-4-2/37 FIO-015 POWERHOUSE - REINFORCEMENT -

GENERATOR BAYS GEN BALCONY &

- TRANSFORMER DECK SH1

IHP-1.1-4-2/38 FIO-016 POWERHOUSE - REINFORCEMENT

GENERATOR - BAYS GEN BALCONY

& TRANSFORMER - DECK SH2

IHP-1.1-4-2/39 FIO-017 POWERHOUSE - REINFORCEMENT

GENERATOR - BAYS GEN BALCONY

& TRANSFORMER - DECK SH3

IHP-1.1-5-0/20 FIO-018 MISC METALWORK - RAIL DETAILS

SH2

IHP-1.1-5-0/21 FIO-019 POWERHOUSE - STRUCTURAL - BUS

STRUCTURE SHEET 1

IHP-1.1-5-0/22 FIO-020 BUS STRUCTURE - SHEET 2

IHP-1.1-5-0/23 FIO-021 BUS STRUCTURE - SHEET 3

IHP-1.1-6-1A5/2 FIO-022 115 KV EQUIPMENT ARRANGEMENT

IHP-1.1-6-1E1/4 FIO-023 EMBEDDED CONDUIT & GROUNDING

- TRANSFORMER DECK UNIT 1 -

SOUTH HALF EL. 368.5

IHP-1.1-6-1E1/6 FIO-024 EMBEDDED CONDUIT & GROUNDING

- MAIN UNIT BAY 2 UPSTREAM

HALF

IHP-1.1-6-1E21/ FIO-025 ONE LINE DIAGRAMS - SU1, CQ11

& CQ12

IHP-1.1-6-1E51/ FIO-026 TERMINAL CONNECTION DIAGRAM -

CQ12, TC1-2-3

IHP-1.1-6-1F1/3 FIO-027 EMBEDDED CONDUIT & GROUNDING

- TRANSFORMER DECK UNIT 3 -

SOUTH HALF EL. 368.5

IHP-1.1-6-2A1/6 FIO-028 POWERHOUSE LIGHTING TRANS.

DECK - & BALCONY EL 368.5

PIPE TRENCH - BAYS 1, 2 & 3

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

IHP-1.1-6-2E1/1 FIO-029 POWERHOUSE - LIGHTING - MAIN

UNIT BAY 1 - EL. 349.5

IHP-1.1-6-2F1/1 FIO-030 POWERHOUSE - LIGHTING - MAIN

UNIT BAY 3 - EL. 349.5

IHP-1.16-6-9D24 FIO-031 BREAKER CONTROL SCHEMATIC -

XWO AND XJO

IHP-1.1-6-9A53/ FIO-032 CABLE ARRANGEMENT - SPREADING

ROOM - EL 362.83

IHP-1.1-6-9A53/ FIO-033 CABLE ARRANGEMENT - SPREADING

ROOM - EL 361.17

IHP-1.1-6-9D51/ FIO-034 15KV & 115KV STATION SERVICE

- BUS, BREAKER & TRANS WIRING

IHP-1.1-6-9E53/ FIO-035 CABLE ARRANGEMENT - MAIN UNIT

1 EL 349.5

IHP-1.1-6-9F53/ FIO-036 CABLE ARRANGEMENT - MAIN UNIT

3 EL 349.5

IHP-1.2-6-1G1/1 FIO-037 EMBEDDED CONDUIT & GROUNDING

- MAIN UNIT BAY 5 - UPSTREAM

HALF

IHP-1.2-6-1G21/ FIO-038 ONE LINE SU5, SU6 & CQ21

IHP-1-3-9/34 FIO-039 POWERHOUSE EXPOSED PIPING -

DIAGRAM TRANSFORMER - CIRCUIT

- BREAKER DELUGE SYSTEM PLANS

IHP-1-3-9/35 FIO-040 TRANSFORMER - CIRCUIT BREAKER

- DELUGE SYSTEMS - SECTIONS

IHP-1-6-1A34/4 FIO-041 POWERHOUSE ELECTRICAL

TRANSFORMER - CIRCUIT BREAKER

DELUGE SYSTEMS

IHP-1-6-1D2/2 FIO-042 4160 VOLT SWITCHGEAR - SP

SHEET 2

IHP-1-6-1D5/1 FIO-043 STATION SERVICE TRANSFORMERS

IHP-1-6-9D24/2 FIO-044 STATION SERVICE CONTROL -

SCHEMATIC DIAGRAM

IHP-1-6-9D4/1 FIO-045 STATION SERVICE - SWITCHBOARD

SO

FILE NUMBER SHEET

NUMBER

DESCRIPTION Revision Number

Date

IHP-9-3-9/8 FIO-046 POWERHOUSE PIPING DIAGRAM -

TRANSFORMER CIRCUIT BREAKER -

DELUGE SYSTEMS

IHP-9-6-13/15 FIO-047 CONDUIT & CABLE SCHEDULE -

ABLE TRAY LOCATIONS - SHEET 6

OF CA

IHP-9-6-9A21/1A FIO-048 SIMPLE POWER GENERATION -

STATION SERVICE ONE LINE

I-W3 FIO-049 STATION SERVICE IMPROVEMENTS

- SOR3

SEERF66-I-FS/01 FIO-050 SWITCHGEAR FUNCTIONAL

SCHEMATIC - DHR BREAKER XP121

SEERF66-I-FS/02 FIO-051 SWITCHGEAR FUNCTIONAL

SCHEMATIC - DHR BREAKER XP221

SEERF66-I-FS/05 FIO-052 WESTINGHOUSE SWITCHGEAR -

FUNCTION SCHEMATIC BREAKER -

XP116, 216 AS MODIFIED

TE-9377-A FIO-053 BASE AND TRUCK ASSEMBLY

IHP-1.1-3-91/16 FIO-054 TRANSFORMER HEAT EXCHANGER -

COOLING WATER AND OIL

CORRECTED

PRINT

3/05/2018

IHP-1.1-3-91/17 FIO-055 TRANSFORMER DELUGE - AND

COOLING WATER

CORRECTED

PRINT

3/05/2018

IHP-1.1-2-0/31 FIO-056 VERTICAL LIFT DOOR CORRECTED

PRINT

3/05/2018

IHP-1.1-2-0/32 FIO-057 TRANSFORMER DOOR CORRECTED

PRINT

3/05/2018

-- End of Document --

DOCUMENT 00 01 15.00 28

SECTION TABLE OF CONTENTS

DIVISION 48 - ELECTRICAL POWER GENERATION

SECTION 48 19 23.01 26

5000/6250 KVA CLASS I POWER TRANSFORMER

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

1.2 GENERAL ARRANGEMENT

1.3 REFERENCED PUBLICATIONS

1.4 SUBMITTALS

1.5 WARRANTY REQUIREMENTS

PART 2 PRODUCTS

2.1 TYPE AND RATING

2.1.1 General

2.1.2 Descriptive Data

2.1.3 Transformer Limiting Dimensions and Equipment Arrangement

2.1.4 Requirements

2.1.5 Standard Products

2.1.6 Ratings and Electrical Characteristics

2.2 STRUCTURAL DESIGN CRITERIA AND SEISMIC CALCULATIONS

2.2.1 Structural Design Criteria

2.2.2 Seismic Calculations

2.2.3 Anchorage to Concrete for Seismic Restraint

2.3 THERMAL DESIGN

2.4 CORE

2.5 WINDINGS

2.5.1 General

2.5.2 Insulation Levels

2.5.3 Short Circuit Capability

2.5.4 Embedded Fiber Optic Probes

2.6 TANK

2.6.1 Construction

2.6.2 Gasketing

2.6.3 Lifting and Moving Facilities

2.6.3.1 Lifting Facilities

2.6.3.2 Moving Facilities

2.6.4 Valves

2.6.5 Connections

2.6.5.1 General

2.6.5.2 Stainless Steel

2.6.6 Steel Pipe and Fittings

2.6.7 Grounding

2.6.8 Steel Supporting Base

2.6.9 Jack Ports

2.6.10 Center of Gravity

2.6.11 Oil Level Markings

2.7 COOLING EQUIPMENT

2.7.1 Radiators

2.7.2 Forced-Air Equipment

2.7.3 Power Supply Equipment

SECTION 48 19 23.01 26

2.7.4 Cooling Control Equipment

2.8 BUSHINGS

2.8.1 General Bushing Requirements

2.8.2 High Voltage Bushings

2.8.3 Low Voltage Bushing

2.8.4 High-Voltage Terminals

2.8.5 Low-Voltage and Neutral Bushing Terminal Connections

2.8.6 Core Ground Bushings

2.8.7 SFRA Test Shipping Bushings

2.9 LOW-VOLTAGE BUSHING THROAT

2.10 HIGH-VOLTAGE BUSHING THROAT

2.11 TRANSFORMER MOUNTED ACCESSORIES

2.11.1 General

2.11.2 Liquid Level Indicator

2.11.3 Analog Temperature Indicating Equipment

2.11.3.1 Liquid Temperature Indicator

2.11.3.2 Winding Temperature Equipment

2.11.4 Electronic Pressure Monitors

2.11.4.1 General

2.11.4.2 Features

2.11.5 Transformer Tank Pressure Relief Device

2.11.5.1 General

2.11.5.2 Oil Discharge Piping

2.11.6 Load Tap Changer Pressure Relief Device

2.11.6.1 General

2.11.6.2 Oil Discharge Piping

2.11.7 Load Tap Changer

2.11.7.1 Load Tap Changer Oil-Filled Switch Compartment

2.11.7.2 Load Tap Changer Motor Drive Enclosure and Controls

2.11.7.3 Load Tap Changer Automatic Voltage Controller

2.11.7.4 Nameplate Listed Tap Positions

2.11.7.5 Special Components and Accessories

2.11.8 Potential Transformer

2.11.8.1 Internally Mounted Potential Transformer

2.11.8.2 Externally Mounted Potential Transformer

2.11.9 On-line Dissolved Gas and Moisture Content Monitor

2.11.9.1 General

2.11.9.2 Mounting and Interconnection

2.11.10 Contacts and Devices

2.11.11 Portable Fall Arrest System Anchor Post

2.11.12 Anchor Post Accessories

2.11.13 Mounting Plate

2.11.14 Storage Box

2.12 OIL

2.12.1 Quantity and Transformer Oil Certification

2.12.2 Type of Oil

2.12.3 Chemical, Physical and Electrical Characteristics

2.12.4 Sampling

2.12.5 Testing

2.13 OIL PRESERVATION SYSTEM

2.13.1 General

2.13.2 Inert-Gas for Transformer Processing

2.13.3 Inert-Gas Pressure System

2.13.3.1 General

2.13.3.2 Pressure Regulating Equipment

2.13.3.3 Alarm functions

2.13.3.4 Enclosure

2.14 TRANSFORMER CONTROL CABINET, POWER CABINET, AND TRANSFORMER

TERMINAL BOX

SECTION 48 19 23.01 26

2.14.1 General

2.14.2 Mounting and Conduit Interface Provisions

2.14.3 Control Cabinet Requirements

2.14.4 Power Cabinet Requirements

2.14.5 Device Nameplates

2.15 CONTROL AND POWER CABINET EQUIPMENT

2.15.1 Cooling Control Equipment

2.15.1.1 General

2.15.1.2 Stages of Cooling

2.15.2 Transformer Fiber Optic Temperature Monitor

2.15.2.1 General

2.15.2.2 Features

2.15.2.3 Monitoring Functions

2.15.2.4 Control Functions

2.15.2.5 Fiber Optic Probes and Connectors

2.15.3 Local Annunciator Panel

2.15.4 Auxiliary Power Transformer

2.15.5 Magnetic Contactors

2.15.6 Molded-Case Circuit Breakers

2.15.6.1 General

2.15.6.2 Trip Units

2.15.6.3 240 V ac Circuits

2.15.6.4 480 Volt AC Circuits

2.15.6.5 120 Volt AC Circuits

2.15.6.6 125 Volt DC Circuits

2.15.7 Auxiliary and Interposing Relays

2.15.7.1 Auxiliary Relays

2.15.7.2 Interposing Relay for the Lockout Relay

2.15.7.3 Time Delay Relays

2.15.8 Control and Instrument Switches

2.15.9 Terminal Blocks

2.15.9.1 Markings

2.15.9.2 Control Signal Type

2.15.9.3 Short-Circuiting Type

2.15.9.4 Power Distribution Blocks

2.15.9.5 Terminal Blocks - Transformer Terminal Box

2.15.10 Fuses and Fuse Holders

2.15.11 Indicating Lights

2.15.12 Lighting, Convenience Receptacle, and Cabinet Heaters

2.15.13 Elapsed Time Meter

2.16 INSULATED WIRE AND CABLE

2.17 CONDUIT SYSTEMS

2.17.1 General

2.17.2 Conduit and Fittings

2.17.3 Outlet and Junction Boxes

2.18 SPARE PARTS

2.19 NAMEPLATES

2.19.1 Transformer Nameplate

2.19.2 Lifting Nameplate

2.19.3 Device Nameplates

2.19.4 Additional Transformer Identification

PART 3 EXECUTION

3.1 TRANSFORMER DESIGN REVIEW MEETING

3.1.1 General

3.1.2 Design Data Review Meeting Requirements

3.2 TRANSFORMER FACTORY ASSEMBLY

3.2.1 General

SECTION 48 19 23.01 26

3.2.2 Outline and Assembly Drawings

3.2.3 Detail Drawings

3.2.4 Welding

3.2.4.1 General

3.2.4.2 Welder Qualifications

3.2.4.3 Welding Materials

3.2.4.4 Welding Procedures

3.2.4.5 Preheat and Interpass Temperature

3.2.4.6 Inspections, Tests and Weld Inspector Qualifications

3.2.5 Manufacturing Inspection by Government Personnel

3.3 TRANSFORMER FACTORY ACCEPTANCE TESTS

3.3.1 General

3.3.2 Factory Acceptance Test Report

3.3.3 Control and Cooling Consumption Losses

3.3.4 Zero-Phase Sequence Impedance

3.3.5 Analog Temperature Gauges

3.3.6 Temperature Rise Test

3.3.7 Audible Sound Level Test

3.3.8 Impulse Tests

3.3.9 Induced Voltage Test With Partial Discharge Measurements

3.3.9.1 General

3.3.9.2 7,200 Cycle Enhancement Level

3.3.9.3 Data Reporting

3.3.10 Dissolved Gas-In-Oil Analysis

3.3.11 Leak Test

3.3.12 Leakage Reactance Measurement Test

3.3.13 Sweep Frequency Response Analysis Tests

3.3.13.1 Required Tests

3.3.13.2 Test Equipment and Test Parameters

3.3.13.3 Test Cable Integrity

3.3.13.4 Test Connections

3.3.13.5 Data Reporting

3.3.13.6 Data Interpretation

3.3.14 Single Phase Excitation Tests

3.3.15 Load Tap Changer

3.3.15.1 Load Tap Changer Design Tests

3.3.15.2 Load Tap Changer Routine Tests

3.3.16 Insulated Wire and Cable

3.4 BUSHING TESTS

3.4.1 General

3.4.2 Bushing Design Tests

3.4.3 Bushing Withstand Test Voltages

3.4.4 Bushing Routine Tests

3.5 FACTORY CLEANING AND PAINTING

3.5.1 General

3.5.2 Interior Surfaces

3.5.3 Exterior Surfaces

3.5.4 Machined Surfaces

3.6 TRANSFORMER SHIPMENT, HAULING AND SITE ASSEMBLY

3.7 OPERATION AND MAINTENANCE MANUALS

-- End of Section Table of Contents --

SECTION 48 19 23.01 26

SECTION 48 19 23.01 26

5000/6250 KVA CLASS I POWER TRANSFORMER

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

This SECTION covers the design, manufacturing and factory testing of one three-phase, oil-filled, Class I power transformer rated 5000/6250 kVA,

13.8 kV high-voltage, 4.16 kV low-voltage, Class ONAN/ONAF cooling, for delivery f.o.b. Destination. The transformer's shipment, hauling, site movement, installation, site re-assembly, connection to the power plant and testing requirements are as required in SECTIONS 48 20 00.00 26, TRANSFORMER SHIPMENT, HAULING, SITE MOVEMENT, SITE REASSEMBLY AND FIELD

TESTING and 26 05 00.00 26, ELECTRICAL EQUIPMENT AND WORK, 26 05 19.00 26, INSULATED WIRE AND CABLE. Throughout this SECTION, the transformer tank layout is identified by Segments 1 through 4, as defined by IEEE C57.12.10, Figure 1 and as indicated on drawing sheets E-203 and E-204.

1.2 GENERAL ARRANGEMENT

The transformer specified in this SECTION will replace one existing three-phase transformer, designated and referred to in Government Powerhouse documentation as TJO, presently located in the Ice Harbor powerhouse. The transformer shall be sized per the requirements of paragraph RATINGS AND ELECTRICAL CHARACTERISTICS. Reference drawings 379D529, IHP-1-6-1D2/2 and IHP-1-6-1D5/1 show the layout and the existing location of the transformer. The new transformer shall be designed and manufactured as required herein for separable steel foundation.

1.3 REFERENCED PUBLICATIONS

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

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI C39.1 (1981; R 1992) Requirements for Electrical Analog Indicating Instruments

AMERICAN SOCIETY FOR NONDESTRUCTIVE TESTING (ASNT)

ASNT SNT-TC-1A (2016) Recommended Practice for Personnel Qualification and Certification in Nondestructive Testing

ASME INTERNATIONAL (ASME)

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

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

ASME B16.1 (2015) Gray Iron Pipe Flanges and Flanged

Fittings Classes 25, 125, and 250

ASME B16.24 (2011) Cast Copper Alloy Pipe Flanges and Flanged Fittings: Classes 150, 300, 600, 900, 1500, and 2500

ASME B18.2.6M (2012) Metric Fasteners for Use in Structural Applications

ASME BPVC SECTION IX (2013) Qualification Standard for Welding and Brazing Procedures, Welders, Brazers, and Welding and Brazing Operators

ASTM INTERNATIONAL (ASTM)

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

ASTM A343/A343M (2014) Standard Test Method for Alternating-Current Magnetic Properties of Materials at Power Frequencies Using Wattmeter-Ammeter-Voltmeter Method and 25-cm Epstein Test Frame

ASTM A53/A53M (2012) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A664 (2015) Standard Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications

ASTM A717/A717M (2012) Standard Test Method for Surface Insulation Resistivity of Single-Strip Specimens

ASTM A876 (2017) Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types

ASTM D923 (2015) Standard Practice for Sampling Electrical Insulating Liquids

ASTM D1533 (2012) Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration

ASTM D1535 (2014) Specifying Color by the Munsell System

ASTM D3487 (2016) Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus

ASTM D4059 (2000; R 2010) Analysis of Polychlorinated Biphenyls in Insulating Liquids by Gas Chromatography

AMERICAN SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7-10 (2010; Errata 2011; Supp 1 2013) Minimum Design Loads for Buildings and Other Structures

AMERICAN WELDING SOCIETY (AWS)

AWS A2.4 (2012) Standard Symbols for Welding, Brazing and Nondestructive Examination

AWS D1.1/D1.1M (2015; Errata 1 2015; Errata 2 2016) Structural Welding Code - Steel

AWS D1.6/D1.6M (2017) Structural Welding Code - Stainless Steel

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

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

IEEE C57.12.00 (2015) General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers

IEEE C57.12.10 (2013) Liquid-Immersed Power Transformers Corrigendum 2: Correction of A.3.2.13 Autotransformer LTC Application Considerations

IEEE C57.12.70 (2011) Standard Terminal Markings and Connections for Distribution and Power Transformers

IEEE C57.12.80 (2010) Standard Terminology for Power and Distribution Transformers

IEEE C57.12.90 (2015; Corr 2017) Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

IEEE C57.13 (2016) Requirements for Instrument Transformers

IEEE C57.19.00 (1991) Standard General Requirements and Test Procedure for Outdoor Power Apparatus Bushings

IEEE C57.19.01 (1991) Standard Performance Characteristics and Dimensions for Outdoor Apparatus Bushings

IEEE C57.104 (2008) IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers

IEEE C57.113 (2010) Recommended Practice for Partial

Discharge Measurement in Liquid-Filled Power Transformers and Shunt Reactors

IEEE C57.131 (2012) Standard Requirements for Load Tap Changers

IEEE C57.149 (2012) Guide for the Application and Interpretation of Frequency Response Analysis for Oil-Immersed Transformers

IEEE C57.152 (2013) IEEE Guide for Diagnostic Field Testing of Fluid-Filled Power Transformers, Regulators, and Reactors

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-72A (2010) Ball Valves with Flanged or Butt-Welding Ends for General Service

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA 250 (2014) Enclosures for Electrical Equipment (1000 Volts Maximum)

NEMA C29.1 (1988; R 2002; R 2012) Test Methods for Electrical Power Insulators

NEMA C80.1 (2015) Electrical Rigid Steel Conduit

(ERSC)

NEMA CC 1 (2009; R 2015) Electrical Power Connection for Substations

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

NEMA ICS 1 (2000; R 2015) Standard for Industrial Control and Systems: General Requirements

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

NEMA ICS 5 (2000; R 2010) Control Circuit and Pilot Devices

NEMA MW 1000 (2016) Magnet Wire

NEMA SG 4 (2009; R 2013) AC High-Voltage Circuit Breakers

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017; ERTA 1-2 2017; TIA 17-1; TIA 17-2)

National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 50 (2007; Reprint Apr 2012) Enclosures for Electrical Equipment, Non-environmental Considerations

UL 248-8 (2011) Low-Voltage Fuses - Part 8: Class J Fuses

UL 360 (2013; Reprint Jan 2015) Liquid-Tight Flexible Steel Conduit

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

UL 508 (1999; Reprint Oct 2013) Industrial Control Equipment

UL 508A (2013; Reprint Jan 2014) Industrial Control Panels

UL 514B (2012; Reprint Nov 2014) Conduit, Tubing and Cable Fittings

UL 969 (1995; Reprint Sep 2014) Standard for Marking and Labeling Systems

UL 1773 (2011) UL Standard for Safety Termination Boxes

UL 4248-8 (2007; Rev thru Oct 2013) Fuseholders - Part 8: Class J

UL 5085-1 (2013) Standard for Safety Low Voltage Transformers - Part 1: General Requirements

UL 5085-2 (2013) Standard for Safety Low Voltage Transformers - Part 2: General Purpose Transformers

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

1.4 SUBMITTALS

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

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

SD-02 Shop Drawings

Outline and Assembly Drawings; G HDC

Detail Drawings; G HDC

SD-05 Design Data

Descriptive Data; G HDC

Spare Parts List; G HDC

SD-06 Test Reports

Transformer Factory Acceptance Test Report; G HDC

Bushing Design Tests; G HDC

Bushing Routine Tests; G HDC

Weld Inspection and Test Report; G, HDC

SD-07 Certificates

Transformer Oil Certification; G HDC

Notification of the Date of the Transformer Design Review Meeting;

G HDC

Notification of the Date of Factory Tests; G HDC

Welder Qualifications; G HDC

Weld Inspector Qualifications; G HDC

Notification of the Date of In-process Inspections; G, HDC

SD-08 Manufacturer's Instructions

Factory Test Procedures; G HDC

Welding Procedures; G HDC

Prequalified Weld Procedures; G HDC

SD-10 Operation and Maintenance Data

Submit the following in accordance with Section 01 78 23.00 28

OPERATION AND MAINTENANCE DATA

Operation And Maintenance Manuals, data package 4; G, HDC

1.5 WARRANTY REQUIREMENTS

In addition to the requirements outlined in FAR 52.246-17 and SECTION 01 78 00.00 28 CLOSEOUT SUBMITTALS, the manufacturer’s warranty for the power transformer shall continue for a period of 5 years from the date of final acceptance of the work. If the Government takes possession of any part of this work before final acceptance, this warranty shall continue for a period of 5 years from the date the Government takes possession. The following transformer issues will also be considered warranty repair items:

a. Transformer gassing rates beyond the Condition 1 level as defined in Table 2 and 3 of IEEE C57.104, or concentrations exceeding the Condition 1 limits as defined in Table 1 of IEEE C57.104

b. Transformer oil leaks.

PART 2 PRODUCTS

2.1 TYPE AND RATING

2.1.1 General

The transformer to be furnished under these specifications shall be three-phase, two-winding, with one high-voltage and one low-voltage winding per phase, oil-immersed type suitable for outdoor operation. The transformer shall be self-cooled/forced air-cooled type, Class ONAN/ONAF, and shall be of a design that has an established record of satisfactory operation with the type of oil preservation system specified. The transformer shall be designed and manufactured for shipment by rail and trucking by heavy hauler, and for shipment by sea if the transformer has a probability of being transported by this method.

2.1.2 Descriptive Data

Descriptive data or catalog data of all accessory devices and ancillary equipment provided with the transformer shall be submitted for approval within 180 calendar days after notice to proceed, to demonstrate fully that all parts of the equipment shall conform to the requirements and intent of the specifications.

2.1.3 Transformer Limiting Dimensions and Equipment Arrangement

The transformer design, configuration, and dimensions shall be as indicated on the contract drawings, and the transformer shall not exceed the limiting dimensions. The transformer terminal box shall be aligned above the existing embedded conduit floor as shown in the contract drawings unless otherwise approved by the government. The disassembled transformer shall fit through the 14 feet wide by 20 feet tall opening to the powerhouse. The powerhouse openings are shown on reference drawings IHP-1.1-2-0/31 and

IHP-1.1-2-0/32.

2.1.4 Requirements

Except as otherwise specified herein, the transformer, accessories, and spare parts shall conform to the applicable requirements of IEEE C57.12.00, IEEE C57.12.10, IEEE C57.12.70, IEEE C57.12.80, IEEE C57.12.90 and

IEEE C57.131.

2.1.5 Standard Products

Material and equipment provided with the transformer shall be standard products of a manufacturer regularly engaged in their manufacture, and shall essentially duplicate items that have been in satisfactory use for at least three years prior to bid opening, unless otherwise specifically approved. All materials shall conform to the requirements of these specifications. Materials shall be of industrial quality, free from defects and imperfections, of recent manufacture, and of the classification and grades designated. All materials, supplies, and articles not manufactured by the Contractor shall be the products of other recognized reputable manufacturers. If the Contractor desires for any reason to deviate from the standards designated in these specifications, a statement shall be submitted for approval describing the exact nature of the deviation, including complete specifications for the materials that are being proposed for use.

2.1.6 Ratings and Electrical Characteristics

The ratings and electrical characteristics of the transformer shall be as follows:

a. Continuous ratings, at the 65°C temperature rated temperature rise, on all taps kVA:

(1) ONAN Rating: 5,000

(2) ONAF Rating: 6,250

b. Frequency, Hz: 60

c. Number of phases: 3

d. Rated voltage, kV:

(1) High-voltage windings: 13.8

(2) Low-voltage windings: 4.16

e. Winding connections:

(1) High-voltage windings: Delta

(2) Low-voltage windings: Grounded-Zig-Zag

f. Impedance, at ONAN rated current, subject to IEEE tolerances, percent: 5.9

g. Angular displacement degrees: 0

h. Basic impulse insulation levels (BIL), kV:

(1) Line ends of the high-voltage windings, not less than: 125

(2) Low-voltage windings, not less than: 75

(3) Neutral ends of the low-voltage windings, not less than: 75

i. Taps in high-voltage windings for Load Tap Changing equipment to provide automatic regulation of +/- 10 percent in steps of 0.625 percent, with 16 steps above and 16 steps below the rated voltage.

j. Maximum no-load losses at rated voltage and frequency, kW: 5

k. Maximum load losses at maximum ONAN rated kVA and 1.0 power factor, kW: 37

l. Maximum average sound level at rated voltage and frequency, with cooling fans in operation, dB: 67

m. Maximum transformer total weight, completely assembled and oil filled with all accessories installed, pounds: 48,000

2.2 STRUCTURAL DESIGN CRITERIA AND SEISMIC CALCULATIONS

Structural design criteria and seismic calculations shall be submitted for approval within 180 calendar days after date of award. Design criteria and calculations shall be performed by qualified structural engineer who are presently registered professional engineer (PE). A cover sheet for the submittal shall be provided and stamped or sealed and signed by a PE.

Structural design criteria and seismic calculations shall be provided for the transformer design, to include the main tank and all major components such as bushings, cooling equipment, and oil preservation equipment.

2.2.1 Structural Design Criteria

Structural design criteria shall include the following:

a. Indicate the industry design standards and allowable stresses or capacities to which steel plate, structural steel shapes, welds, bolts and studs shall conform.

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

c. Seismic design for equipment restraint shall be in accordance with Chapter 13 "Seismic Design Requirements for Nonstructural Components", of ASCE 7-10 with the seismic design force computed as per Section

13.3 "Seismic Demands on Nonstructural Components". Electrical equipment restraint shall be designed in accordance with the provisions in IEEE 693 Annex D or Section 13.3 of ASCE 7-10 whichever produces the more adverse seismic effects. For ASCE 7-10, use a spectral response acceleration SDS=0.282, component importance factor IP=1.5, and z/h=1. For IEEE 693, the seismic qualification level shall be moderate.

2.2.2 Seismic Calculations

Seismic calculations shall include the following:

a. Derivation of seismic forces and load cases. Load cases used for developing seismic anchorage of the complete transformer shall account for the effect of the righting force of the weight of the transformer.

b. Calculations for use in the design of anchorage to resist overturning and base shear. The maximum uplift and shear force per anchor bracket bolt shall be provided in pounds or kips.

c. A schematic depicting the location of the center of gravity, the applied seismic forces relative to the base, and the location of seismic anchors.

d. Calculations for individual components and their attachment to the transformer.

2.2.3 Anchorage to Concrete for Seismic Restraint

For the purposes of performing seismic calculations and for transformer design for anchorage to the powerhouse concrete floor, the structural steel supporting base will be welded to steel plates on a foundation anchored to the powerhouse deck.

2.3 THERMAL DESIGN

The temperature rise above ambient temperature of the transformer or parts thereof, when tested in accordance with its ratings, shall not exceed the limits of observable temperature rise for oil immersed apparatus as stated in IEEE C57.12.00 (paragraph 5.11.1). The winding temperature rise by resistance shall not exceed 65°C, and the hottest spot winding temperature rise shall not exceed 80°C on the tap connections that give the highest losses, at all self-cooled and forced-air cooled ratings.

2.4 CORE

The transformer core shall be constructed of high-quality, non-aging, cold-rolled, grain-oriented steel especially suitable for the purpose. The core steel laminations shall meet the requirements of ASTM A664 and ASTM A876, shall be an ASTM Core-Loss Type 27H074 and shall have a maximum thickness of 0.270 mm, and the design flux density shall not exceed 1.70 Tesla. The use of paper insulation in the core will not be acceptable.

Electrical core steel core loss, rms exciting power, rms and peak exciting current, and ac permeability shall be tested in accordance with ASTM A343/A343M. Each roll of sheet steel used shall have the surface insulation resistivity tested in accordance with ASTM A717/A717M. The core shall be carefully assembled and rigidly clamped to ensure adequate mechanical strength to support the windings and to prevent shifting of the laminations during shipment, and also to reduce vibration to a minimum under operating conditions. Core joints shall be interleaved. Each transformer core design and construction methods shall be in such a manner to assure that the average sound level due to operation of the transformer and accessories shall not exceed 67 dB at rated voltage and frequency as measured in accordance with IEEE C57.12.90.

2.5 WINDINGS

2.5.1 General

The transformer shall be manufactured with windings meeting the requirements of paragraph RATINGS AND ELECTRICAL CHARACTERISTICS, consisting of one high-voltage winding (H) per phase and one low-voltage winding (X) per phase. The winding conductors shall be of high-conductivity copper magnet wire meeting the applicable requirements of NEMA MW 1000, and if of a core-form design shall be of a circular coil construction. Conductor insulation shall consist of thermally upgraded Kraft paper. Consideration shall be given to all factors of service, such as high dielectric and mechanical strength of insulation, coil characteristics, and minimum restrictions to free circulation of oil.

Coils shall be made up, shaped, and braced to provide for expansion, contraction, and shrinkage due to temperature changes and aging in service in order to avoid abrasion of insulation and to provide resistance to movement and distortion caused by abnormal operating conditions. Adequate barriers shall be provided between windings and core and between high-voltage and low-voltage windings. End coils shall have additional protection, if required, against normal line disturbances. The delta and zig-zag winding connections shall be made inside the transformer tanks.

An energized load-tap changer shall be provided, with taps located in the high-voltage windings. The tap changer contacts shall be silvered, and capable of withstanding the full short circuit current of the transformer without injury.

2.5.2 Insulation Levels

The transformer shall be manufactured with a BIL rating of the windings as specified in paragraph RATINGS AND ELECTRICAL CHARACTERISTICS, and shall be capable of withstanding IEEE Standard dielectric tests, in accordance with paragraph "Power Transformer Tests", corresponding to the specified winding insulation levels.

2.5.3 Short Circuit Capability

The transformer shall be capable of withstanding without injury the mechanical and thermal stresses caused by short circuits on the external terminals of any winding or windings, with rated voltages maintained across the terminals of all other windings intended for connection to sources of energy, under the conditions listed in IEEE C57.12.00 (paragraph 7.1.1).

2.5.4 Embedded Fiber Optic Probes

Fiber optic probes used for direct winding temperature measurement shall be embedded in the high and low voltage windings. Quantities and distribution shall be as indicated in paragraph TRANSFORMER FIBER OPTIC TEMPERATURE MONITOR. Probes shall be embedded in the calculated hottest spot for each winding.

2.6 TANK

2.6.1 Construction

Each transformer shall be provided with an oil-tight steel tank, with oil-tight covers per the requirements of IEEE C57.12.10 (paragraph 5.8).

The tank shall be provided with one or more unobstructed manholes in the cover with minimum dimensions of 10 inches by 16 inches rectangular, or 15 inches diameter round as a minimum, to afford easy access to the lower ends of bushings, terminals, and the upper portions of the coils. Suitable positioning guides shall be provided inside the tank to assure the core and windings are in the correct position during assembly. The main transformer tank and any attached compartment that is subjected to operating pressures shall be manufactured to withstand, without leakage or permanent deformation, an internal pressure not less than 10 psi. The tank shall be manufactured for vacuum filling (essentially full vacuum) in the field.

All valves, fittings and piping affected by vacuum filling shall be rated for such filling. Auxiliary compartments such as reservoir tanks, when not designed for vacuum filling, shall be so designated, and suitable isolating valves shall be provided. The joints between the tank and cover, and between tank sections shall be welded, and the joint shall prevent weld splatter from entering the inside of the tank.

2.6.2 Gasketing

Gaskets between metal surfaces shall be set in expansion-limiting grooves or held in position by retainers so arranged that all contact surfaces are metal-to-metal when tightened. The gaskets shall be made of Nitrile NBR (Buna N) with a Durometer rating between 50 and 60. Gaskets shall be rated for compression by at least 25 percent of their original thickness. O-ring gaskets shall not be used for gasket grooves of rectangular cross-section.

2.6.3 Lifting and Moving Facilities

2.6.3.1 Lifting Facilities

Design loads for lifting eyes, lugs or hooks shall be two times the actual load to allow for possible unequal lifting forces, with a safety factor (using design loads) in accordance with IEEE C57.12.10 (paragraph 5.3.1).

Lifting eyes, lugs, or hooks shall positively keep the lifting cable in place even when the cable is slack. The transformer shall be provided with the following lifting facilities:

a. Lifting attachments on the tank cover.

b. Adequate means for lifting the core and coil assembly from the tank.

c. Lifting eyes on the tank shall be adequate for lifting the complete transformer filled with oil, and located at the top of the tank sidewalls for a transformer of core-form design. The placement of the lifting eyes shall allow for lashing of the transformer during shipment.

2.6.3.2 Moving Facilities

Moving features shall be furnished as required for moving each transformer to its final location as indicated in the contract drawings, and shall be in accordance with IEEE C57.12.10 (paragraph 5.3.3).

2.6.4 Valves

The transformer shall be provided with valves conforming with IEEE C57.12.10 (paragraph 5.1.8), unless otherwise specified below. All valves shall be of stainless steel construction conforming to MSS SP-72A, circular flanged, reinforced PTFE valve seats, and shall be ball-type unless otherwise specifically indicated. The valves shall be of full-port type,when available, rated for use with insulating oil, have a 120° C minimum temperature rating, and shall be include provisions for locking of the handle. Valve handles shall be of a circular, or oval type. Weather resistant locks shall be provided for all valves, keyed the same. All valves which have an outbound connection remaining open shall be provided with either a blind-flange, including a gasket and associated hardware, or a plug/cap on the NPT threaded connection. Valves shall be provided for the following:

a. Upper filter connection. A 2-inch valve shall be located on the Segment 1 tank sidewall such that it can be used to fill the transformer with oil while the transformer is under vacuum. The outbound connection shall be a 2-inch female NPT thread, provided with a threaded plug.

b. Vacuum pump connection. A 3-inch valve shall be located on the tank cover for use in connecting a vacuum pump during the vacuum filling process. The outbound valve connection shall be a circular 4-bolt flanged, provided with a gasketed blind flange cover with an integral 3-inch NPT female connection with threaded plug.

c. Main drain. A 2-inch valve shall be located at the extreme bottom of the Segment 3 tank sidewall for use in gravity draining of the transformer. The outbound valve connection shall be circular 4-bolt flanged, provided with a gasketed blind flange cover, with an integral 2-inch NPT female connection with threaded plug.

d. Oil sampling valve. A sampling valve shall be located at the extreme bottom of the Segment 3 tank sidewall with a 1/2-inch NPT threaded discharge end. This valve may be integral to the lower filter valve. A 1/2-inch threaded sampling device, complete with protective cover, shall be provided for the purposes of obtaining oil samples, and shall be a United Brass Works Model 86 as manufactured by United Brass Works, 714 S. Main Street, Randleman, NC 27317, or approved equal. The oil sampling valve salient physical, functional, or performance characteristics an equal item must meet to be acceptable are as follows:

(1) Sampling valve designed for oil sampling

(2) Brass valve body and brass cap

(3) Cover attached to body with brass ball-chain type lanyard

(4) Rated operating Temperature -50°C to +135°C

(5) Buna o-rings and Buna gaskets

e. Lower filter connection. A 2-inch valve shall be located at the extreme bottom of the Segment 3 tank sidewall. The outbound connection shall be a 2-inch female NPT thread, provided with a threaded plug.

f. Nitrogen gas connection. Two 1/2-inch valves shall be provided for connection of the oil preservation system tubing.

g. Isolation valves. The following isolation valves shall be provided:

(1) Electronic Pressure Monitor Transducer. Isolating the electronic pressure monitor transducers. The outbound valve connection shall be circular 4-bolt flanged and sized to match the bolt pattern of the manifold for the electronic pressure monitor transducers.

(2) Radiators. At the inlet and outlet of each radiator to permit removal without draining the oil from the tank. Radiator isolation valves at the transformer tank may be of a butterfly type, and may be of steel with a corrosion resistant paint.

(3) On-line dissolved gas-in-oil monitor. Two 1.5-inch valves shall be provided on Segment 1 tank sidewall in locations as recommended by the manufacturer for connection to the on-line dissolved multi-gas and moisture content monitor. The outbound connections shall be a 1/4-inch female NPT thread, provided with a threaded plug.

2.6.5 Connections

2.6.5.1 General

All bolts, studs, machine screws, nuts, and tapped holes designed for customer connection shall be in accordance with ASME B1.1 (inch fasteners), or ASME B18.2.6M (metric fasteners). Bolting hardware shall be Grade 5 minimum, or equivalent, and all hardware not internal to the tank shall be galvanized. Threads for sizes 1/4-inch to 1-inch, inclusive, shall be NC or UN series. The sizes and threads of all valves, pipe and fittings, conduit and fittings, tubing and fittings, and connecting equipment, shall be in accordance with ASME B1.20.1. Manufacturers' standard threads and construction may be used on small items which are integrally replaceable, except that threads for external connections to these items shall meet the above requirements.

2.6.5.2 Stainless Steel

All stainless steel connecting hardware shall be installed using an anti-galling compound such as molybdenum disulfide on the threads prior to connection.

2.6.6 Steel Pipe and Fittings

Steel pipe shall conform to ASTM A53/A53M, Weight A, Class 2. Dimensions of terminating flanges shall conform to ASME B16.1 and ASME B16.24.

2.6.7 Grounding

Two ground pads shall be provided on the transformer for grounding the tank and base.