Amendment_0003_Revised_33_78_00.00_26.pdf

Ice Harbor Surge Arrester & 115kV Disconnect Upgrades W912EF18R0004 Amendment 0003

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 78 00.00 26

HIGH VOLTAGE OUTDOOR INSTRUMENT TRANSFORMERS

PART 1 GENERAL

1.1 GENERAL

1.2 REFERENCES

1.3 SUBMITTALS

1.4 MANUFACTURER'S QUALIFICATIONS

1.5 GENERAL REQUIREMENTS

1.5.1 Bill of Materials

1.5.2 Manufacturer's Nameplate

1.5.3 Contractor's Drawings

1.5.4 Operation and Maintenance Manual

PART 2 PRODUCTS

2.1 GENERAL REQUIREMENTS

2.1.1 Support Structure

2.1.2 Structural Design Criteria

2.1.3 Hardware

2.1.4 Galvanizing

2.1.5 Casing

2.1.6 Junction Box

2.1.7 Lifting Lugs

2.1.8 Insulating Medium

2.1.9 Bushings

2.1.10 Terminals

2.1.11 Gaskets

2.2 123kV INDUCTIVE VOLTAGE TRANSFORMERS

2.2.1 General

2.2.2 Windings

2.3 FACTORY TESTS

2.3.1 General

2.3.2 Bushing Tests

2.4 SPARE PARTS

PART 3 EXECUTION

3.1 INSTALLATION

3.2 FIELD ACCEPTANCE TESTS

3.3 SERVICES OF THE INSTRUMENT TRANSFORMER MANUFACTURER'S ERECTING

ENGINEER

3.4 CONTRACTOR-FURNISHED TRAINING OF GOVERNMENT PERSONNEL

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SECTION 33 78 00.00 26

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SECTION 33 78 00.00 26

HIGH VOLTAGE OUTDOOR INSTRUMENT TRANSFORMERS

PART 1 GENERAL

1.1 GENERAL

Switchyard instrument transformers shall be outdoor wound type, single-phase, oil insulated. Each device shall be furnished with insulators, insulating medium, metal mounting base, terminal box for secondary leads and connections, lifting lugs, valves and accessories to make the unit complete for operation and maintenance. Application will be outdoors in unconfined air, in a hydroelectric powerhouse substation at an altitude below 3,300 feet, within ambient temperature extremes of -40 C to +50 C.

1.2 REFERENCES

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 SOCIETY OF CIVIL ENGINEERS (ASCE)

ASCE 7-10 (2010; Change 2010; Change 2011) Minimum Design Loads for Buildings and Other Structures

ASME INTERNATIONAL (ASME)

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

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

ASTM INTERNATIONAL (ASTM)

ASTM A 123/A 123M (2015) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A 153/A 153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM B 98/B 98M (2013) Standard Specification for Copper-Silicon Alloy Rod, Bar, and Shapes

ASTM D 3487 (2013) Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

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

SECTION 33 78 00.00 26

IEEE C57.19.00 (2004) Standard General Requirements and Test Procedure for Power Apparatus Bushings

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

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA CC 1 (2009) Electric Power Connection for Substations

1.3 SUBMITTALS

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

submittals having an "I" designation are for information only. Designation following the "G" or "I" designation identifies the office that will review the submittal for the Government. Submit in accordance with SECTION

01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Bill of Materials; I HDC

Outline Drawings; G HDC

Mounting Details; G HDC

Schematic Diagrams; G HDC

Wiring Diagrams; G HDC

Manufacturer's Nameplate; I HDC

SD-03 Product Data

123kV Inductive Voltage Transformers; G HDC

SD-05 Design Data

Structural Design Criteria and Seismic Calculations; I HDC

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

PE.

SD-06 Test Reports

Factory Tests; G, HDC

Bushing Tests; I HDC

Power Factor Tests; G, HDC

SD-07 Certificates

Erecting Engineer's Qualifications; G, HDC

SD-10 Operation and Maintenance Data

Contractor-Furnished Training of Government Personnel; G, HDC

Operation and Maintenance Manual; G, HDC

1.4 MANUFACTURER'S QUALIFICATIONS

The instrument transformer manufacturer(s) shall have at least five years of experience in the design and manufacture of instrument transformers of similar types and ratings.

1.5 GENERAL REQUIREMENTS

1.5.1 Bill of Materials

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

1.5.2 Manufacturer's Nameplate

The base of each instrument transformer shall bear the manufacturer's nameplate, which shall be in accordance with IEEE C57.13.

1.5.3 Contractor's Drawings

The following drawings shall be submitted in accordance with paragraph:

SUBMITTALS:

a. Outline drawings showing:

(1) Mounting details and dimensions.

(2) Net weight of each complete assembly, including insulators.

(3) Mounting details and provisions for adjustment.

(4) Net weight of the instrument transformers.

b. Schematic diagrams.

c. Detailed wiring diagrams showing both the internal and external connections.

1.5.4 Operation and Maintenance Manual

Operation and Maintenance Manual shall be submitted per SECTION 01 78 00.00 28 CLOSEOUT SUBMITTALS. The O&M manual shall contain all information that may be needed or useful for operation, maintenance tasks with specific instructions and associated frequencies, repair, dismantling or assembling, and for identification of parts for ordering replacements, including step-by-step operating instructions, description of individual operating parts as well as the systems as a whole, and identification of lockout/tagout points. The address, telephone, and website (if available) for the manufacturers' service organization shall be clearly identified in the manual.

PART 2 PRODUCTS

2.1 GENERAL REQUIREMENTS

2.1.1 Support Structure

Instrument transformers shall be mounted on existing structures as shown on the contract drawings. Mounting plates and/or adapter plates necessary to mount the new instrument transformer on the existing structure shall be determined by the instrument transformer manufacturer and provided by the manufacturer or by the installation contractor. Attachment method shall meet the seismic requirements of Section 13 48 00.00 26 and IEEE 693. All bolts, studs, machine screws, nuts, and tapped holes shall be in accordance with ASME B1.1. Threads for sizes 1/4-inch to 1-inch, inclusive, shall be NC or UNC series. The sizes and threads of all pipe fittings, shall be in accordance with ASME B1.20.1. Manufacturers' standard threads and construction may be used on small items which, are integrally replaceable, except that threads for external connection to these items shall meet the above requirements. Where requirements differ from other Sections, the more stringent shall apply.

2.1.2 Structural Design Criteria

Structural design criteria and seismic calculations shall be provided for the instrument transformers. 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 switch and switch components.

c. The effect of seismic design forces shall meet or exceed that obtained from the requirements and methods referenced in IEEE 693.

d. The effect of wind load forces shall be accounted for based upon Section 26.5.1 "Basic Wind Speed" of ASCE 7-10, or 40 psf, whichever is greater. Where requirements differ from other Sections, the more stringent shall apply.

2.1.3 Hardware

Bolts, nuts washers and pins used in the assembly of non-ferrous parts shall be silicon bronze conforming to ASTM B 98/B 98M, Alloy B, or non-magnetic stainless steel.

2.1.4 Galvanizing

All galvanizing shall be performed in accordance with ASTM A 123/A 123M or ASTM A 153/A 153M as applicable.

2.1.5 Casing

The instrument transformers shall be provided with a suitable corrosion-resistant metal casing which shall be sealed and be of a leak-proof design. All exposed metal parts of the insulator and casing shall be adequately protected by hard and durable weatherproof finish. A pressure relief device shall be provided to prevent rupture of the case or insulator in case of an internal electrical fault. Instrument transformers shall have a valve for filling, draining, and sampling the insulating medium, with level or position indicator to insure proper level of insulating medium. A grounding connection shall be provided suitable for No. 4/0 AWG.

2.1.6 Junction Box

A weatherproof NEMA 4 junction box or low-voltage terminal box shall be mounted at the base of each instrument transformer.

2.1.7 Lifting Lugs

Suitable eyebolts and/or lugs shall be provided for lifting the essential parts and also for lifting the assembled instrument transformers when filled.

2.1.8 Insulating Medium

The insulating medium shall be insulating oil meeting the requirements of ASTM D 3487. Insulating medium shall be furnished and installed by the Contractor.

2.1.9 Bushings

Bushings may be ceramic or polymer, and shall comply with the applicable requirements of IEEE C57.19.00. The minimum total creepage distance shall be 150 inches (3815 mm).

2.1.10 Terminals

Primary terminals shall be copper or high-conductivity copper alloy.

Primary terminal pads shall be uniformly tinned and shall have flat pads with four holes conforming to NEMA CC 1. Secondary transformer leads shall be terminated on terminal blocks; minimum wire size for leads shall be No.

10 AWG stranded copper wire. The terminal blocks shall be enclosed in a weatherproof terminal box with a removable cover. The terminal box shall have not less than two, tapped, 1-inch or 1-1/2-inch conduit hubs, each located on a different side of the terminal box or one similar conduit hub which can be rotated to allow conduit entrance from at least three directions. The conduit hubs shall not interfere with the removal cover or access to the terminal board.

2.1.11 Gaskets

Gaskets shall not be affected by hot insulating oil, shall retain their resiliency during the life of the associated equipment, and shall be impervious to the effects of weather while maintaining oil and gas tightness. Gaskets made of such materials as cork-neoprene or nitrile are acceptable. Gaskets made of cork only or neoprene only are not allowed.

Gaskets flanges shall have stops or grooves to prevent crushing of gaskets.

2.2 123kV INDUCTIVE VOLTAGE TRANSFORMERS

2.2.1 General

The voltage transformers shall be suitable for synchronizing, relaying, and metering purposes and shall meet the applicable requirements of IEEE C57.13.

The accuracy class for each voltage transformer at 60 Hertz shall be 0.3 for each of standard burdens W, X, Y, Z, and ZZ. Thermal rating shall be 8500 VA.Thermal rating shall not be less than 2500 VA at 30 degrees C ambient.

2.2.2 Windings

The voltage transformer primary windings shall be rated for 115kV phase-to-ground operation, 550kV BIL. Two sets of secondary windings shall be provided, each 69/115V Oil filled types shall include a conservator system, bellows, or a nitrogen gas cushion. The cores shall be carefully assembled and rigidly clamped to ensure adequate mechanical strength to support the windings, to prevent shifting and to reduce vibration to a minimum. The windings shall be copper and designed with special consideration to all factors of service such as high dielectric and mechanical strength of insulation, coil characteristics and minimum restrictions, to free expansion and contraction due to temperature changes in order to avoid abrasion of insulation and to provide rigidity to resist 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.

2.3 FACTORY TESTS

2.3.1 General

The Contractor shall assure that the equipment being furnished meets each of the test requirements. Certified copies of test reports shall be furnished.

2.3.2 Bushing Tests

All design tests listed in IEEE C57.19.00 paragraph 7.2 shall have been performed on the bushing used for the instrument submitted. All routine tests listed in IEEE C57.19.00 paragraph 7.4 shall be performed on the production bushings, including:

a. Capacitance measurement tests

b. Power factor tests

c. Rated frequency dry withstand test with partial discharge measurements

d. Tap withstand voltage tests

e. Internal pressure and vacuum tests

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2.4 SPARE PARTS

All spare parts shall be of the same material, workmanship, and manufacture as the corresponding original parts, and they shall be interchangeable therewith. A detailed list of the spare parts along with itemized prices shall be submitted for approval. The following spare parts shall be furnished:

a. One inductive voltage transformer.

PART 3 EXECUTION

3.1 INSTALLATION

The Contractor shall install new inductive voltage transformers on each phase as shown on the drawings. The Contractor shall be responsible for providing mounting plates for bolting the equipment to the existing steel supports as required.

3.2 FIELD ACCEPTANCE TESTS

All tests required herein shall be witnessed by the Contracting Officer unless waived in writing, and no equipment shall be shipped until it has been approved for shipment by the Contracting Officer. The Contractor shall notify the Government 30 days in advance of the date of the tests so that arrangements can be made for the Contracting Officer to be present at the tests. The costs of performing all tests shall be borne by the Contractor and shall be included in the prices bid for the items of equipment. Prior to energizing any equipment supplied under this contract, the Contractor shall have performed and documented all manufacturer's standard equipment checkouts. The Contractor shall submit his final system checkout procedure to the Government, and it shall be approved prior to final checkout and energizing of the new unit connected system. Contractor shall supply all equipment and manpower required to implement the approved testing plan. As a minimum, the following operational tests shall be performed by the Contractor as part of the field acceptance tests:

a. Check each instrument transformer for accurate line metering readout.

b. Perform a Power Factor test in accordance with the test equipment manufacturer's published data.

c. Perform insulation-resistance tests winding-to-winding and each winding-to-ground, 5,0000 volts DC for one minute. Minimum insulation resistance shall be 5,000 Megohms.

d. Perform a polarity test on each transformer to verify the polarity marks.

e. Perform a turns-ratio test on all tap positions.

f. Measure voltage circuit burdens at transformer terminals.

3.3 SERVICES OF THE INSTRUMENT TRANSFORMER MANUFACTURER'S ERECTING ENGINEER

The Contractor shall furnish one or more erecting engineers that speak, read, and write fluently in the English language and has been trained by the instrument transformer manufacturer in the installation of the instrument transformers furnished under this contract. The erecting engineer shall supervise and be responsible for the testing, erecting, starting, and operation of the equipment until field tests are completed and the equipment is ready for normal operation. The work and operations of the erecting engineer shall be coordinated with the program of installation / construction at the job site. Submit the erecting engineer's qualifications for approval.

3.4 CONTRACTOR-FURNISHED TRAINING OF GOVERNMENT PERSONNEL

The Contractor shall provide training sessions as described in Section

01 11 01.00 28 SUPPLEMENTARY REQUIREMENTS.

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