Attachment B - WAPA Specifications - 2-1DistributionTransformers(2017).doc

SUBSTATION - ELECTRICAL

EQUIPMENT SPECIFICATIONS

WAPA ES 2.1

DISTRIBUTION TRANSFORMERS

TABLE OF CONTENTS

12.1.1 General

2.1 - 2.1.2 Percent Impedance Voltage Limits

2.1 - 1 2.1.3 MateriaL

2.1 - 1 1.

Bushings

2.1 - 1 2.

Pressure Relief

2.1 - 1 3.

Pad Mounted Transformers

2.1 - 1 2.1.4 Tests

2.1 - 1 2.1.5 Painting

2.1 - 1 2.1.6 Seismic Qualification

2.1 - 1 2.1.7 Drawings And Data

2.1 - 2 1.

General

2.1 - 2

Table-A Drawings And Data Schedule

2.1 - 3 2.

Installation Drawings And Data

2.1 - 3 3.

Informational Drawings And Data

2.1 - 3 4.

Final Drawings And Data

2.1 - 4 5.

Right To Use The Contractor’s Drawings

2.1 - 4

2.1.1 GENERAL: Distribution transformers shall be in accordance with applicable parts of IEEE C57 and Western’s requirements which include limits on percent impedance voltage ratings. Only equipment of current manufacture shall be furnished.

2.1.2 PERCENT IMPEDANCE VOLTAGE LIMITS: Transformer percent impedance voltage ratings shall fall within the following limits:

Percent Impedance Voltage Rating Limits

Rating

(kVA) Limits

(% IZ)

Rating

(kVA) Limits

(% IZ)

1.0 – 5.0

1.5 – 6.0

1.9 – 6.0

2.9 – 6.0

3.8 – 6.0

The lower percent IZ limits furnished shall prevent transformer secondary faults from exceeding 22,000 amps.

2.1.3 AVERAGE WINDING TEMPERATURE: The design of the transformer shall be such as the average winding temperature does not exceed 55°C at base rating, and when tested at 112% of base rating, shall not exceed 65°C.

2.1.4 DIELECTRIC COOLANT: The design of the transformer shall be such as the dielectric coolant shall be Envirotemp FR3 fluid or equal. The dielectric coolant shall be listed less-flammable fluid meeting the requirements of National Electrical Code Section 450-23 and the requirements of the National Electrical Safety Code (IEEE Std C2™-2002 standard), Section 15. The dielectric coolant shall be non-toxic, non-bioaccumulating and be readily and completely biodegradable per EPA OPPTS 835.3100. The base fluid shall be 100% derived from edible seed oils and food grade performance enhancing additives. The fluid shall not require genetically altered seeds for its base oil. The fluid shall result in zero mortality when tested on trout fry (per OECD G.L. 203). The fluid shall be certified to comply with the US EPA Environmental Technology Verification (ETV) requirements, and tested for compatibility with transformer components. The fluid shall be Factory Mutual Approved®, UL® Classified Dielectric Medium (UL-EOUV) and UL® Classified Transformer Fluid (UL-EOVK), Envirotemp™ FR3™ fluid or equal.

2.1.5

MATERIAL:

1. BUSHINGS: Bushings shall be gray in color.

2. PRESSURE RELIEF: A pressure relief method shall be provided to automatically relieve internal gas pressure.

3. PAD MOUNTED TRANSFORMERS: Pad mounted transformers shall have the following features:

a. Oil level gage.

b. Oil sampling device.

c. Dead front high-voltage terminations and equipment conforming to IEEE C57.26 requirements. Bushing wells and parking stands for mounting accessory equipment shall be universal type. Bushing wells shall be externally clamped and in accordance with IEEE 386.

d. Low-voltage bushings shall be molded epoxy type and provided with blade-type spade terminal with NEMA CCI standard hole spacing. The low-voltage neutral shall be an insulated bushing grounded to the transformer tank by a removable grounding strap.

e. The high-voltage and low-voltage compartments shall be separated by a metal barrier, shall be located side-by-side on one side of the transformer. When viewed from the front, the low-voltage side shall be on the right. Each compartment shall have a door. There shall be a locking mechanism and pad lock provisions to prevent opening the doors. There shall be a metal Data Pocket attached on the inside of one of the doors which will hold a copy of the instruction manual and final drawings.

f. The tank shall be complete with an anodized aluminum laser engraved nameplate. This nameplate shall meet Nameplate B per IEEE C57.12.00-2010 standard.

2.1.6 TESTS: Transformers shall receive routine tests required by paragraph 8.1.1 of IEEE C57.12.00 and paragraph 4.1 of IEEE C57.12.20 except that load loss and exciting current tests are not required.

2.1.7 PAINTING: The distribution transformers shall be painted ANSI 70 gray in accordance with the manufacturer’s standard painting system.

2.1.8 SEISMIC QUALIFICATION: When seismic qualification is required, data and requirements shall be provided in accordance with the latest IEEE 693. The data required for metal tag to be attached to equipment may be provided on the nameplate. A seismic report is not required for the low seismic performance level.

2.1.9

DRAWINGS AND DATA:

4. GENERAL: Drawings and technical data required to be furnished by the Contractor shall be in English, with dimensions in feet and inches, weight in pounds, and volume in cubic feet or cubic inches.

The drawings and data shall be complete, accurate in their content, and legible. Drawings shall be prepared using CAD or drafting equipment, shall be drawn to scale, and shall have neat lettering. Drawings or informational data shall be provided as a standard PDF file, Electronic CAD “*.dwg” (AutoCAD 2010 or 2014 formats), Microsoft Word (.doc/.docx) or Microsoft Excel .xls/.xlsx formats. Freehand sketches or skewed scans will not be accepted. Western will require 40 calendar days to answer correspondence pertaining to each submittal of data or drawings.

Schematic and wiring diagrams shall have graphical symbols and device function numbers conforming to the latest applicable standards of ANSI Y32.2/IEEE 315, ANSI/IEEE 315A, and IEEE C37.2.

Reproducible prints shall be of such quality as to permit clear, sharp, legible prints or other reproductions to be made by direct contact methods.

Western shall have the right to require the Contractor to make any changes in the drawings and data that may be necessary to show the equipment furnished conforms to the requirements of the specifications and these standards. The design and coordination of this electrical equipment shall be the responsibility of the Contractor and Western assumes no responsibility to approve or review drawings and data that are submitted. Western’s review of the Contractor’s drawings shall not relieve the Contractor of meeting all requirements of these specifications or for the correctness of his drawings. Revised drawings shall show revision dates and all changes and revisions circled on the drawings. Drawings shall not exceed 22 inches in height by 36 inches in width.

Procurement and construction specifications include the delivery times, quantities, and destinations for drawings and data submittals. The following Table – A shows the normal delivery time and quality requirements.

TABLE-A

DRAWINGS AND DATA SCHEDULE

(CALENDAR DAYS)

TYPE OF MATERIAL

Furnish one print of each final drawing and a copy of instruction manual with equipment.

Seismic qualification report may be submitted within 150 calendar days after date of contract award, if equipment not previously qualified per latest IEEE 693. A seismic report is not required for the low seismic performance level.

5. INSTALLATION DRAWINGS AND DATA: The required delivery time and type of material for installation drawings and data are listed in Table-A. The installation drawings and data are required to prepare final design of foundations and, when applicable, support structures. Drawings and data required include all of the following that are applicable:

g. Transformer outlines, dimensions, and weights

h. Base type, dimensions, and mounting details.

i. Location, types, sizes, and projections of required embedded anchor bolts.

j. Location and size of required openings in the foundation for conduits.

k. Orientation of equipment and a complete anchor bolt setting plan.

l. Size and location of jacking pads for transformer.

m. Overall equipment cabinet dimensions, including height above equipment base.

n. Seismic qualification report. Data and requirements shall be provided in accordance with ANSI 693. A seismic report is not required for the low seismic performance level.

6. INFORMATIONAL DRAWINGS AND DATA: The required delivery time and type of material for informational drawings and data are listed in Table-A. The drawings and data shall:

o. Include outlines, details, schematic diagrams, wiring diagrams and instructions.

p. Specifically verify conformance with equipment requirements.

q. Be sufficiently complete to allow preparation of final design and installation drawings including wiring diagrams.

7. FINAL DRAWINGS AND DATA: The minimum delivery time and type of material for final drawings and data are listed in Table-A. The drawings and data shall include the following:

r. Final Drawings: Final drawings shall be furnished and shall show changes, and revision dates therefor, made up to the time the drawings are furnished.

Final Drawings shall include the following:

(2) Outlines of equipment.

(3) Wiring and schematic diagrams.

(4) Nameplate drawing.

s. Parts Identification Lists or Bills of Materials for the Equipment: Each part shall be assigned an identifying number which can be used for ordering replacements, and a reference number that locates the part on the appropriate outline drawing. Separate lists are not required if data is shown on outline drawings.

t. Manufacturer’s instructions covering installation, operation, and maintenance repair for the equipment. Equipment shipped shall include a print of each final drawing, as required above, and a printed copy of the instructions.

u. Insulating Liquid Certification: Certification shall be furnished showing that insulating liquids used in equipment do not contain polychlorinated biphenyls.

v. Test Reports: Prior to shipment, the Contractor shall furnish certified copies of required test reports, performance curves, and data. Any equipment that does not successfully pass the testing requirements will be rejected.

5. RIGHT TO USE THE CONTRACTOR’S DRAWINGS: Western reserves the right to use, reproduce in whole or in part, to distribute, and to reuse any and all such drawings, whether copyrighted or not, in connection with the following:

w. Installation, maintenance, replacement, and repair of the articles to be furnished under the specifications and these standards.

x. Making any and all such drawings and reproductions thereof available to subsequent bidders and the Contractors, where necessary for fabricating and furnishing articles connected with or dependent upon, information shown on the drawings and duplicating the drawings to be furnished hereunder.

The depositing of all such drawings with Western shall constitute a license to Western to use said drawings in the manner hereinabove stated.

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