Attachment_ CRCBF-04 Station Service Transformer SECTION 1000.pdf

SECTION 1000

33 71 26 26 TND

Voltage Transformers

33 71 26.26 - 1

33 71 26.26 TND.DOCX 12/03/2013

SECTION 33 71 26.26 – VOLTAGE TRANSFORMERS

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section includes the individual specifications and requirements for substation voltage transformers to be furnished by this contract. Quantities as indicated on the Drawings.

B. Erection and assembly required at the Job Site will be performed by others.

C. Items furnished under this Section shall comply with the requirements of Division 01.

1.02 REFERENCE STANDARDS:

A. Design, construct, test, and assemble all equipment and materials in conformance with the latest revisions and supplements of all applicable NEMA, IEEE, ASTM, and OSHA standards including, but not limited to, the following:

1. Institute of Electrical and Electronics Engineers (IEEE):

a. C2 - National Electrical Safety Code.

b. C57.13 - Requirements for Instrument Transformers.

c. C57.13.2 - Conformance Test Procedures for Instrument Transformers.

d. C57.13.3 - Guide for Grounding of Instrument Transformer Secondary Circuits and

Cases.

e. C57.19.00 - General Requirements and Test Procedure for Power Apparatus

Bushings.

f. C57.19.01 - Performance Characteristics and Dimensions for Outdoor Apparatus

Bushings.

g. C57.98 - Guide for Transformer Impulse Tests.

2. National Electrical Manufacturers Association (NEMA):

a. EI 21.2 - Instrument Transformers for Revenue Metering (125-kV BIL through

350-kV BIL).

3. American Society for Testing and Materials (ASTM):

a. A6 - Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling.

b. A108 - Steel Bars, Carbon and Alloy, Cold Finished.

c. A123 - Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.

d. A143 - Safeguarding Against Embrittlement of Hot-Dip Galvanized Structural Steel

Products and Procedure for Detecting Embrittlement.

e. A153 - Zinc Coating (Hot-Dip) on Iron and Steel Hardware.

f. A370 - Test Methods and Definitions for Mechanical Testing of Steel Products.

g. A394 - Steel Transmission Tower Bolts, Zinc-Coated and Bare.

h. B8 - Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft.

i. B188 - Seamless Copper Bus Pipe and Tube.

j. B211 - Aluminum and Aluminum-Alloy Bars, Rods, and Wire.

k. B232 - Concentric-Lay-Stranded Aluminum Conductors, Coated Steel-Reinforced

(ACSR).

l. B236 - Aluminum Bars for Electrical Purposes (Bus Bars).

m. B317 - Aluminum-Alloy Extruded Bar, Rod, Tube, Pipe, and Structural Profiles for

Electrical Purposes (Bus Conductors).

4. Occupational Safety and Health Act (OSHA).

B. Acceptable manufacturers are listed in PART 2. Other manufacturers than those listed may be employed with the approval of the Owner and if the item to be furnished conforms to this Specification.

C. Experience:

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1. The manufacturer of each item of equipment or material furnished shall be regularly engaged in the fabrication of the item and it shall have an acceptable history of satisfactory, reliable service in outdoor substation use for a period of at least three years under comparable environmental conditions.

2. Newly developed equipment with less than three years actual service will be considered from established manufacturers only if it has been adequately tested, meets the requirements of this contract, and is approved by the Owner.

1.03 COMPLIANCE SUBMITTAL:

A. Submit as specified in Division 01.

B. Furnish the following types of drawings:

1. Furnish Drawings necessary for design, erection, installation, and operation of all equipment and materials furnished including, but not limited to, the following:

a. Complete drawings and descriptive bulletins for installation, adjustment, testing, maintenance, and operation of all equipment including bus weldments, connectors, insulators, corona fittings, etc.

b. General outline, nameplate, and internal wiring drawings of all equipment.

c. Schematic diagrams showing all external electrical connection terminal numbers.

d. Bushing and insulator outline drawings.

e. Drawings showing additional detail if requested by the Owner or otherwise required for installation and maintenance.

2. Standard drawings of equipment which do not indicate clearly the exact size, model number, and optional items to be furnished will be returned to the Supplier for this information before review by the Owner.

PART 2 - EQUIPMENT

2.01 VOLTAGE TRANSFORMERS:

A. Ratings:

1. Nominal system voltage (kV): 230.

2. Primary line-to-ground voltage (kV): 133.

3. Basic impulse level (kV): 900.

4. Frequency (Hz): 60.

5. Secondary voltage ratings (V): 120/240.

6. Minimum thermal rating (KVA): 50.

B. Type and Design:

1. Single-phase.

2. Oil immersed and self-cooled.

3. Color of bushing porcelain shall be ANSI 70 Gray.

4. Color of base housing shall be ANSI 70 Gray.

5. Furnish all standard accessories including oil, lifting eyes, terminal connectors, secondary junction boxes, oil level gauge, and provisions for mounting and grounding.

C. Acceptable Manufacturers:

1. ABB Power T&D Company, Inc.

2. Associated Engineering.

3. Electromagnetic Industries, Inc.

4. Trench Electric.

5. Ritz.

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PART 3 - EXECUTION

3.01 FIELD SERVICES:

A. Correction of errors, discrepancies, or omissions shall be made immediately upon notification from the resident Owner in order to prevent delay of construction. All corrections resulting from errors, discrepancies, shipping damage, etc., approved by the Owner to avoid delay in construction and required for the installation and proper use of equipment shall be paid for by the Supplier.

3.02 SHIPMENT:

A. All voltage transformers shall be delivered to the Site in open top trucks or trailers protected by tarpaulin to facilitate unloading by crane.

END OF SECTION 33 71 26.26