Exhibit D - Specifications.pdf

Exhibit D – Specifications

WVU EVANSDALE CAMPUS TRANSFORMER FOR AG ANNEX

SUBSTATION PART 1 - GENERAL

1.1 SCOPE

A. The Supplier shall provide one (1) primary substation, liquid filled transformer as required for complete and operating systems, and as specified herein. The transformer shall ship as a complete, fully assembled unit requiring no parts to be installed in the field by the Owner or installing contractor. All freight is to be included. The transformers shall be identified as follows:

1. One (1) Ag Science Annex Substation Transformer #3

1.2 REFERENCES

A. The substation transformer shall be designed, manufactured and tested in accordance with the latest applicable standards of NEMA and ANSI. ANSI C57.12.00, ANSI 12.01, ANSI 12.90, and NEMA TR-1.

1.3 SUBMITTALS – FOR REVIEW/APPROVAL

A. The following information shall be submitted to WVU with your proposal:

1. Master drawing index

2. Documentation of location of sales office within 75 air miles of the project

3. Front view elevation with dimensions and weight

4. Plan view with dimensions

5. Schematic diagrams

6. Terminal block identification & location for customer’s external connections

7. Nameplate diagram

8. Component list

9. Conduit entry/exit locations

10. Ratings including:

a. kVA

b. Primary and secondary voltage

c. Taps

d. Primary and secondary continuous current

e. Basic Impulse Level

f. Impedance

g. Insulation class and temperature rise

h. Sound level

11. Cable terminal sizes

12. Single phase power requirements (kVA, voltage) for fans, fed from integral control power transformer(s)

13. Single phase power requirements (kVA, voltage) for load tap change, fed from integral control power transformer(s)

14. Volume of fluid for transformer(s)

15. Volume of fluid for load tap changer

16. Product data sheets

1.4 SUBMITTALS – FOR CONSTRUCTION

A. The following information shall be submitted for record purposes, after award:

1. Final as-built drawings and information for items listed in section 1.03

2. Wiring diagrams

3. Certified production test reports 4. Installation information

B. The final (as-built) drawings shall include the same drawings as the construction drawings and shall incorporate all changes made during the manufacturing process

1.5 QUALIFICATIONS

A. The manufacturer of this equipment shall have produced similar electrical equipment for a minimum period of five (5) years. If requested by the WVU, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.

B. The equipment and major components shall be suitable for and certified to meet all applicable seismic requirements of the IBC/ASCE 7 for Morgantown, WV and the following seismic design data:

1. Building Risk Category III (IBC Table 1604.5)

2. Seismic Importance Factor (Ie) 1.25 (Table 1.5-2)

3. Spectral Response Acceleration (Ss) 0.093

4. Spectral Response Acceleration (S1) 0.047

5. Seismic Site Class D (Default)

6. Spectral Response Coefficient (Sds) 0.099

7. Spectral Response Coefficient (Sd1) 0.076

8. Seismic Design Category B (Table 11.6-2)

C. The following minimum mounting and installation guidelines shall be met, unless specifically modified by the above referenced standards.

1. Mounting recommendations shall be provided by the manufacturer based upon approved shake table tests used to verify the seismic design of the equipment.

2. The equipment manufacturer shall certify that the equipment can withstand, that is, function following the seismic event, including both vertical and lateral required response spectra as specified in above codes.

3. The equipment manufacturer shall document the requirements necessary for proper seismic mounting of the equipment. Seismic qualification shall be considered achieved when the capability of the equipment meets or exceeds the specified response spectra.

1.6 DELIVERY, STORAGE AND HANDLING

A. Equipment shall be handled and stored in accordance with manufacturer’s instructions.

One copy of these instructions shall be included with the equipment at shipment time.

1.7 OPERATION AND MAINTENANCE MANUALS

A. Equipment operation and maintenance manuals shall be provided with each assembly shipped and shall include instruction leaflets, instruction bulletins and renewal parts lists where applicable, for the complete assembly and each major component

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. The following are suggested acceptable manufacturers. Manufacturer must maintain and operate a sales office within 75 air miles of the project site for ongoing support and maintenance of the transformer. The listing of specific manufacturers does not imply acceptance of their products that do not meet the specified ratings, features and functions.

Manufacturers listed are not relieved from meeting these specifications in their entirety.

1. Virginia Transformer

2. ABB

3. Pennsylvania Transformer

4. Cooper

2.2 LIQUID FILLED SUBSTATION TRANSFORMER WITH LTC

A. The ratings of the transformer shall be as follows or as shown in the drawings:

1. kVA Rating: 5000/6250 ONAN/ONAF at 55 degree C rise

2. kVA Rating:5600/7000 ONAN/ONAF at 65 degree C rise

3. Impedance :6.5% ANSI Standard Tolerance of +/- 7.5%

4. HV: 22.9kV Delta

5. HV BIL:150kV

6. HV De-energized Taps: 2+/2-, each at 2-1/2% full capacity

7. LV: 4360 Volts Wye

8. LV BIL:75kV

9. LV Tap Changer: See description below

B. Transformer dimensions shall fit within existing pad. Primary and secondary conduit openings shall accommodate the existing conduit stub ups. Refer to attached sketch. If Supplier takes any exception to the dimensional requirements, notify WVU in writing prior to the close of the RFP question and answer period.

2.3 CONSTRUCTION

A. The transformer shall be a single, fully assembled unit from the factory, including all required accessories and associated wiring from integral control power transformer sources. No external power connections other than the primary and secondary feeder conductors will be required.

B. The unit shall be Mineral Oil filled and shall be in accordance with the latest edition of the NEC.

C. The transformer shall carry its continuous rating with average winding temperature rise by resistance that shall not exceed 55 degrees C, based on average ambient temperature of 30 degrees C over 24 hours with a maximum of 40 degrees C. The insulation system shall allow an additional 12% kVA output at 65 degrees C average winding temperature rise by resistance, on a continuous basis, without any decrease in normal transformer life.

D. High voltage windings shall be cylindrical / disc and copper wound. Low voltage coils shall be cylindrical / disc and copper wound. Coils shall be designed to make use of directed fluid flow.

E. Transformer shall include all devices, wiring, fans, and auxiliary equipment necessary for automatic temperature controlled forced air cooling to obtain an additional 25% capacity.

Control power for fans shall be 208/120Vac, single phase provided from a control power transformer(s) included in a transformer mounted control panel. Control power transformers must be fed from the transformer secondary from the factory.

F. The transformer shall be designed to carry short time emergency overloads in accordance with ANSI C57.12.92 as applicable. Duration and magnitude of designed withstand capability shall be as outlined in ANSI C57.12.90 and the latest draft of the IEEE shortcircuit test code.

G. The transformer shall be designed to meet the sound level standards for liquid transformers as defined in NEMA TR1. The measurement procedure shall be as specified in ANSI C.57.12.90.

H. High-voltage and low-voltage windings shall be copper. Insulation between layers of the windings shall be by Insuldur paper or equal.

I. The main transformer tank and attached components shall be designed to withstand pressures 25% greater than the required operating design value without permanent deformation. Construction shall consist of carbon steel plate reinforced with external sidewall braces. All seams and joints shall be continuously welded.

J. Tank discharge strength shall be adequate to prevent tank rupture under low-level electrical faults.

K. Each radiator assembly shall be individually welded and receive a quality control pressurized check for leaks. The entire tank assembly shall receive a similar leak test before tanking. A final six-hour leak test shall be performed after the transformer is tanked, welded and completed to ensure that there are no leaks before shipment. The radiators are to be flange mounted with an included shut-off valve.

L. Transformer shall be provided with a 32-position automatic on-load (resistance transition with series transformer) tap changer in the LV winding to provide +/- 10% regulation in +/- 16 steps full capacity on all raised positions and nominal current on all lower positions.

The tap changer shall include a position indicating dial. The tap changer controls shall be accessible from ground level. The tap changer shall be ABB Type UZE resistive tap changer or approved equal. The tap changer shall also have the following features:

1. The motor driven on-load tap changer shall be mounted on the transformer tank in a separate mineral oil filled compartment.

2. The load tap changer separate mineral oil filled compartment shall be provided with a mechanical over-pressure relief device.

3. A voltage-regulating relay shall be provided for automatic control of the load tap changer. Sensing voltage will be provided by the customer via voltage transformers within the 5kV switchgear enclosure located in close proximity to the transformer’s low voltage cable terminal compartment.

4. The tap changer motor, voltage regulating relay, controls, shall be rated 120/240 volts, single phase. The purchaser shall provide the power supply for these items to the control cabinet.

5. Breakers shall be provided in the control cabinet to protect the motor and control circuits.

6. An “automatic – manual” selector switch shall be provided for either automatic or manual control.

7. An operations counter shall be provided to record the number of operations.

8. Pushbuttons shall be provided for raising and lowering the tap changer on manual operation.

9. A crank mechanism with electrical interlocks shall be provided for operating the tap changer by hand.

10. Controls shall be provided for adjusting the balance voltage, the bandwidth and the raise-lower time delay of the tap changer.

11. Indicator lights shall be provided to indicate raise or lower control.

12. A thermostatically controlled heater, light and duplex receptacle shall be provided in the control cabinet, rated 120/240 volts, single phase. Single phase phase power shall be provided from a control power transformer(s) included in a transformer mounted control panel. Control power transformers must be fed from the transformer secondary from the factory.

13. The series transformer will be sized to reduce the current on the LTC so that the LTC can operate 500,000 operations without scheduled maintenance.

M. Transformer shall be provided with surge protection consisting of three (3) intermediate class, metal oxide varistor type, rated 24kV MCOV.

N. The primary and secondary conductor connection bushings shall be live front with spades and/or spade extensions with centerline located 84 inches or less above the surface of the existing transformer mounting pad. The transformer manufacturer shall provide tin-plated copper spade extensions with supports as required for the connection of the existing primary and secondary conductors to the transformer.

O. The primary and secondary connection compartments shall include thermostatically controlled strip heaters to prevent condensation. Single phase power for the strip heaters shall be provided from a control power transformer(s) included in a transformer mounted control panel. Control power transformers must be fed from the transformer secondary from the factory.

P. The transformer plan dimensions and conduit openings shall be compatible with the existing transformer pad size and the locations of the primary and secondary conduit stub-ups, including spares. Refer to attached sketch for additional information and requirements.

2.4 ACCESSORIES

A. Transformer features and accessories shall include:

1. De-energized primary connected tap changer with cover mounted, externally operated, padlockable handle

2. Combination drain and filter valve and sampling device (one each for transformer and tap changer)

3. Manual gas pressure test connection

4. Filling plug and filter press connection in cover

5. Dial-type top liquid thermometer

6. Magnetic liquid level gauge

7. Provisions for lifting, provisions for jacking, base designed for skidding or rolling in two directions

8. Ground pad – stainless steel

9. Instruction nameplate – stainless steel

10. Pressure vacuum gauge

11. Welded-on main tank cover and manhole in cover

12. Pressure relief device (one each for transformer and tap changer)

13. Alarm contacts shall be provided on the following devices:

a. Magnetic liquid level gauge

b. Dial type thermometer

c. Pressure vacuum gauge

d. Pressure relief device (both main tank and LTC)

2.5 FINISH

A. The paint shall be applied using an air spray with air-dry acrylic topcoat system to a minimum of three mils average thickness. Units shall be painted ANSI 61 for outdoor service.

PART 3 - EXECUTION

3.1 FACTORY TESTING

A. The following standard factory tests shall be performed on all equipment provided under this section. All tests shall be in accordance with the latest version of ANSI and NEMA standards.

1. Resistance measurements of all windings on the rated voltage connection of each unit and at the tap extremes of one unit only of a given rating on this project

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

3. Polarity and phase-relation tests on the rated voltage connections

4. No-load loss at rated voltage on the rated voltage connection

5. Exciting current at rated voltage on the rated voltage connection

6. Impedance and load loss at rated current on the rated voltage connection of each unit and on the tap extremes of one unit only of a given rating on this project

7. Applied potential test

8. Induced potential tests

B. The manufacturer shall provide three (3) certified copies of factory test reports.

C. Core and coil inspection prior to tanking and final testing shall be witnessed by third party reviewer from Transformer Specialist, Inc. as well as two representatives from West Virginia University. Notification of these dates shall be at least two weeks prior to the events.

a. Perform excitation-current tests in accordance with test equipment manufacturer's instructions.

b. Measure resistance of each high-voltage winding in each no-load tap-changer position. Measure resistance of each low-voltage winding in each load tap changer position, if applicable.

c. If core ground strap is accessible, measure core insulation resistance at 500 volts dc.

d. Remove a sample of insulating liquid in accordance with ASTM D-923.

Sample shall be tested for the following:

Dielectric breakdown voltage: ASTM D-877 and/or ASTM D- 1816. Acid neutralization number: ASTM D-974.

Specific gravity: ASTM D-1298. (Optional) Interfacial tension: ASTM D-971 or ASTM D- 2285. Color: ASTM D-1500.

Visual Condition: ASTM D-1524.

Parts per million water: ASTM D- 1533.

e. Measure dissapation factor or power factor in accordance with ASTM D-924.

f. Remove a sample of insulating liquid in accordance with ASTM D3613 and perform dissolved gas analysis (DGA) in accordance with ANSI/IEEE C57.104 or ASTM D-3612.

g. For load tap changers, perform the following:

1) Perform insulation-resistance tests on each winding to ground.

2) Perform special tests and adjustments as recommended by the manufacturer.

3) Perform turns-ratio test at all tap positions.

4) Remove a sample of insulating liquid in accordance with ASTM D923.

The sample shall be tested for the following in accordance with the referenced standard.

5) Dielectric breakdown voltage: ASTM D877

6) Color: ANSI/ASTM D1500

7) Visual condition: ASTM D1524

3.2 DELIVERY

A. A. The successful proposer shall be responsible for delivering the transformer(s) to the WVU’s designated site (Ag. Sci. Annex Substation, 359 Evansdale Drive, Morgantown, WV 26505.) WVU shall offload the transformer(s) from the supplier’s truck and store for installation by others. The expected delivery date shall be provided as early as possible. Delivery shall be coordinated two weeks in advance and again 48 hours prior to arrival.

END OF SECTION

- g'-4" -- 7'-4" -

ACTIVE CONDUIT

CONTROLS

TIVE CONDUIT

118z"

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2·-�

PRIMARY 22.9KV

NOMINAL ¢5"

TYPICAL FOR 2

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COMPARTMENT

TO 25KV GEAR -

EXISTING TRANSFORMER 2'- 7Z"

BEING REMOVED UNDER 8

SEPARATE CONTRACT

16'-9"

SECONDARY 436OV

COMPARTMENT

TO AG ANNEX

EXISTING TRANSFORMER PAD DIMENSIONS

SCALE: NONE