C0847_Specifications_Amended_Sections.pdf

Solicitation No. R17PS00016 Amendment 0002 TRD Powerplants Replacement of Station Service Transformers & LV Bus Systems - RAX 566 Specifications No. 20-C0847

Power Transformers 26 22 16 - 1

SECTION 26 22 16

POWER TRANSFORMERS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. Power Transformers:

1. Price:

a. Includes cost of extra materials; special tools.

b. Includes cost of labor, material and equipment required for the power transformer.

c. Includes cost of labor, material and equipment required for the neutral of the power transformer.

d. Includes cost of labor, material and equipment required for meters, switches and relays for the power transformer assembly.

e. Includes cost of labor, material and equipment required for the NEMA 3R enclosure of the power transformer.

f. Includes cost of labor, material and equipment required for nameplates, accessory devices, fabrication and finish of the power transformer.

g. Includes cost of labor, material and equipment required for rigid steel conduit and cables internal to the power transformer.

h. Includes cost of labor, material and equipment required for connections to high-voltage (HV) and low-voltage (LV) circuits for the power transformer assembly.

i. Includes cost of contractor’s source quality testing.

j. Includes cost of furnishing and installing the power transformer and its corresponding equipment.

k. Includes cost of labor, material and equipment required to make electrical connections to equipment and devices.

l. Includes cost of labor and equipment required to program and calibrate all new equipment and any existing interface equipment.

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m. Include cost of furnishing and installing Transformer Monitoring Devices.

B. Payment: Include cost in the lump sum prices offered in the Schedules for Power Transformer(s).

1.02 RELATED SECTIONS

A. Section 26 25 13 - Removing and Modifying Existing Equipment

B. Section 03 30 00 - Cast-In-Place Concrete

C. Section 26 05 02 - Basic Electrical Materials and Methods

D. Section 26 05 10 - Conductors And Cables

E. Section 26 05 33 - Electrical Conduit

F. Section 28 46 16 - Transformer Monitor

1.03 REFERENCE STANDARDS

A. Use current version unless noted.

B. American National Standards Institute (ANSI; also ANSI/IEEE)

1. ANSI C57.12.01 Standard General Requirements for Dry-Type Distribution and Power Transformers Including Those with Solid Cast and/or Resin-Encapsulated Windings.

2. ANSI C57.12.51 Requirements for Ventilated Dry-Type Power Transformers, 501 KVA and Larger, Three-Phase with

High-Voltage 601 to34 500 Volts, Low Voltage 208Y/120 to 4160

3. ANSI C57.12.91 Test Code for Dry-Type Distribution and Power Transformer

4. ANSI C57.98 Impulse Tests, Guide for Transformer

C. Institute of Electrical and Electronic Engineer (IEEE)

1. IEEE C2-2012 National Electric Safety Code (NESC)

2. IEEE C57.12.56™ Standard Test Procedure for Thermal Evaluation of Insulation System for Ventilated Dry-Type Power and

Distribution Transformer

3. IEEE C57.12.59™ Guide for Dry-Type Transformer Through-Fault Current Duration

4. IEEE C57.12.70™ Terminal Markings and Connections for Distribution and

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Power Transformer

5. IEEE C57.12.94™ Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformer

6. IEEE C57.12.96™ Guide for Loading Dry-Type Distribution and Power Transformers

D. International Electrical Testing Association, Inc. (NETA)

1. NETA ATS-2013 Acceptance Testing Specifications for Electrical Power Distribution Equipment and Systems

E. International Code Council (IBC)

1. IBC-2012 International Building Code

F. National Electrical Manufacturers Association (NEMA)

1. NEMA ST- 20 Dry Type Transformers for General Applications

2. NEMA ICS 5-2000 Industrial Control and Systems: Control Circuit and Pilot Pilot Devices

3. NEMA ST 20-1997 Dry Type Transformers for General Applications

4. NEMA WC 3-1992 Rubber-Insulated Wire and Cable for the Transmission and Distribution of Natural Energy

G. National Fire Protection Association (NFPA)

1. NFPA 70-2014 National Electrical Code (NEC)

H. Underwriters Laboratories, Inc. (UL)

1. UL 1561 Standard for Dry-Type General Purpose and Power

Transformers; Current Edition, Including All Revisions.

1.04 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals and Section 01 33 26 - Electrical Drawings and Data.

B. RSN 26 22 16-1, Approval Data:

1. Manufacturer’s technical data.

2. Transformer outline, nameplate, connection diagrams, and shop drawings.

C. RSN 26 22 16-2, Factory Test Reports:

1. Certified test reports.

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D. RSN 26 22 16-3, Operation and Maintenance (O&M) Instruction Books:

1. Provide in accordance with Section 01 33 26 - Electrical Drawings and Details

2. Installation and operating instructions, maintenance, troubleshooting and repair procedures and technical literature pertaining to all components or instruments provided.

E. RSN 26 22 16-4, Field Test Reports:

1. Provide in accordance with Section 01 33 26 - Electrical Drawings and Details.

F. RSN 26 22 16-5, Final Drawings:

1. Transformer installation and location drawings.

2. Shop drawings.

3. Provide computer drawing files on CD-ROM disc in AutoCAD (*.dwg) 2014 version or newer.

1.05 QUALITY ASSURANCE

A. The manufacturer shall be ISO 9001 or 9002 certified.

B. The manufacturer shall have specialized experience in the design, manufacture and assembly of dry-type power transformer for a minimum of 20 years.

C. The power transformers at each location shall meet all applicable seismic requirements of the 2012 International Building Code (IBC).

1. Judge Francis Carr Powerplant and Spring Creek Powerplant are located in Shasta County, California.

2. Trinity Powerplant is located in Trinity County, California.

D. The three phase rotation delivered to the primary of existing station service transformers varies with location and transformer. Refer to specification drawing 416-D-755, 416-D-785, and 416-D-4701 Single Line Drawings for the Trinity, JF Carr and Spring Creek Powerplants respectively.

1.06 REGULATORY REQUIREMENTS

A. Contractor shall be licensed as classification type C-10 by the California Contractors State License Board (CLSB).

B. The power transformer shall be listed by Underwriters Laboratories and shall bear a UL label.

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1.07 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, protect, and handle products in accordance with recommended practices listed in manufacturer's Installation and Maintenance Books.

B. Handle transformer in accordance with manufacturer's written instructions to avoid damaging equipment, installed devices, and finish. Lift only by installed lifting provisions.

C. Inspect and report any damage to OGR immediately in writing.

1.08 FIELD MEASUREMENTS

A. Contractor is required to make all necessary field measurements to ensure that new power transformer designed and provided shall fit in existing space, shall accommodate existing high voltage (HV) isolated phase bus and low voltage (LV) bus ducts, and shall be in full compliance with minimum required clearances recommended by the manufacturer and specified in National Electrical Code.

B. Refer to Section 26 25 13 - Removing and Modifying Existing Equipment.

PART 2 PRODUCTS

2.01 GENERAL:

A. Type: Dry type, self-cooled, pad mount power transformer that is ABB Vacuum Pressure Impregnated (VPI) Secondary Unit Substation type or equal. Refer to existing JF Carr KRB transformer photographs 1, 2 and 10 in section 51 00 03 Photographs: JF Carr Powerplant in this specification.

B. Elevation:

1. Trinity Powerplant: 1950 feet

2. Judge Francis Carr Powerplant: 1250 feet.

3. Spring Creek Powerplant: 650 feet

C. Each of the five transformers shall be vacuum pressure impregnated (VPI) construction and shall be mounted in a ventilated outdoor enclosure (NEMA 3R). They shall be designed and manufactured in accordance with ANSI/IEEE C57.12.01 (2008).

D. Each transformer core shall be constructed of high-grade non-aging silicon steel laminations with high magnetic permeability, low hysteresis and eddy current losses.

Magnetic flux density is to be kept well below the saturation point. Core construction shall include mitered joints to keep core losses, excitation current and noise level at a minimum.

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E. Each transformer coil shall be impregnated using the VPI process. Coils shall be pre-heated. Individual windings shall be pressure impregnated with polyester resin/varnish such that the resin/varnish penetrates and seals the windings. The VPI process shall effectively impregnate the entire core and coil assembly which results in a unit which is virtually impermeable to moisture, dust, dirt, salt air and other industry contaminants.

F. Vibration isolation pads shall be provided to isolate the core and coil assembly from the casing.

G. Provide and install VIB-X-PAD by VIBRASCIENCES INCORPORATED or approved equal.

H. At each of the TRD powerplants (Trinity, JF Carr and Spring Creek), the existing high side current transformers (CTs) are located in the isolated phase bus (IPB) which is the High Voltage bus to the transformer KRB. These CTs feed existing overcurrent relays (GE 51) which provide protection to the existing KRB transformer.

I. The existing Trinity CTs and corresponding relays will not be affected by the Trinity KRB transformer replacement, will be reused for the new Trinity KRB transformer and are not part of this project.

J. The new Spring Creek CTs shall be furnished and installed on the primary side of the Spring Creek KRB transformer as described in specification Section 26 09 14 Current Transformers.

K. Design, furnish, install and test high voltage (HV) connections to the primary side of the new transformers (KRC); Trinity, JF Carr and Spring Creek Powerplants. Refer to specification Section 26 25 13, 3.02 MODIFICATION OF STATION SERVICE

TRANSFORMERS HV AND LV SIDE CONNECTIONS.

2.02 RATING:

A. The KRB transformer at Trinity Powerplant and the KRB and KRC transformers at Spring Creek Powerplant shall be rated as follows:

1. 750 kVA

2. Three phases

3. Primary voltage (HV):

a. 13.8 kV, 60 Hz, delta connection

b. Basic impulse level (BIL): 110 kV

c. Taps: Two 2½ percent full-capacity above normal and two 2½ percent full-capacity below normal, on the high voltage winding.

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d. HV bushings located on top of the transformer, similar configuration as the existing bushings shown on specification drawing 416-M-208-000046- 050, Y1000-1, for connecting with existing isolated phase bus ducts.

4. Secondary voltage (LV):

a. 480/277 VAC, 60 Hz, Wye connection

b. Basic impulse level (BIL): 45kV

c. LV bushings (if applicable) located on the right when facing the transformer front, similar configuration as the existing bushings shown on drawing 416-M-000046-054, Y1001, for connecting with existing bus ducts.

d. Per the specification drawings, the low voltage bus duct interface will include bus to ends with a throat.

e. Existing low voltage bus connection into existing switchgear is shown in specification photographs and drawings. The contractor shall field verify all measurements and connections.

f. Low voltage side enclosed circuit breaker (52C) is required for each of the KRB transformers (total of two circuit breakers). Refer to Section 26 28 30 - Enclosed Circuit Breakers. This breaker is in a separate enclosure from the transformer.

5. The coils (HV and LV conductor windings) shall be wound with copper conductors.

6. All insulating materials shall be in accordance with ANSI/IEEE C57.12.01 for 220°C UL insulation system.

7. Transformer average temperature raise: 115°C above a 40°C maximum, 30°C average ambient. The transformer shall not exceed the specified temperature rise when it is operated continuously at full name plate rating.

8. Space heaters and corresponding thermostat are required for dry type transformers located outdoors. This is especially important if the transformer is turned off for any length of time.

9. Sound level shall not exceed the maximum specified by ANSI/IEEE C57.12.01 for applicable KVA size of dry-type transformer.

10. UL listed.

11. Impedance Rating: Provide impedance rating of 5.84% with +/- 7.5% tolerance.

12. Transformer Neutral: The three new transformers shall each have a neutral ground which will allow grounding external from each of the transformers.

B. The KRC transformer at Trinity Powerplant and the KRC transformer at JF Carr Powerplant shall be rated as follows:

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1. 750 kVA

2. Three phases

3. Primary voltage (HV):

a. 12 kV, 60 Hz, delta connection

b. Basic impulse level (BIL): 110 kV

c. Taps: Two 2½ percent full-capacity above normal and two 2½ percent full-capacity below normal, on the high voltage winding.

d. HV bushings located on top of the transformer. The contractor shall field verify all connections.

4. Secondary voltage (LV):

a. 480/277 VAC, 60 Hz, Wye connection

b. Basic impulse level (BIL): 45 kV

c. LV bushings (if applicable) located on the right when facing the transformer front, similar configuration as the existing bushings shown on drawing 416-M-000046-054, Y1001, for connecting with existing bus ducts.

d. Per the specification drawings, the low voltage bus duct interface will include bus to ends with a throat.

5. The coils (HV and LV conductor windings) shall be wound with copper conductors.

6. All insulating materials shall be in accordance with ANSI/IEEE C57.12.01 for 220°C UL insulation system.

7. Transformer average temperature raise: 115°C above a 40°C maximum, 30°C average ambient. The transformer shall not exceed the specified temperature rise when it is operated continuously at full name plate rating.

8. Space heaters and corresponding thermostat are required for dry type transformers located outdoors. This is especially important if the transformer is turned off for any length of time.

9. Sound level shall not exceed the maximum specified by ANSI/IEEE C57.12.01 for applicable KVA size of dry-type transformer.

10. UL listed.

11. Impedance Rating: Provide impedance rating of 5.84% with +/- 7.5% tolerance.

12. Transformer Neutral: the two new transformers shall have a neutral ground which will allow grounding external from each of the transformers.

C. Provide five transformers that meet the Department of Energy Efficiency Standard based on the year of manufacture.

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• https://www.regulations.gov

D. Year of manufacture shall be 2016 or greater.

2.03 ENCLOSURE:

A. NEMA 3R

B. The contractor shall verify the existing space for the two new KRB transformers. Refer to the following resources:

1. 51 00 01 Photographs Trinity Powerplant

2. 51 00 02 Photographs Judge Francis Carr Powerplant

3. 51 00 03 Photographs Spring Creek Powerplant

4. 52 00 00 Drawings

C. The contractor is responsible for verifying all dimensions and details in the field.

2.04 NAMEPLATES:

A. Manufacturer's standard.

2.05 ACCESSORIES:

A. The new transformer shall include a temperature indicating device having the following features:

1. Mechanical Indicator – for temperature display is preferred and does not require power.

2. Presently, 120VAC power does not exist at the existing KRB transformer, but can be included if a digital temperature display is used.

3. Including high temperature alarm dry contacts rated for 125 VDC

B. UL listed

C. Refer to Section 26 25 13 - Removing and Modifying Existing Equipment for corresponding cable and conduit requirements.

D. Transformer Monitoring Device required for each transformer. See Section 28 46 16 - Transformer Monitors.

2.06 FINISH

A. Manufacturer’s standard finish.

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PART 3

3.01 INSTALLATION

A. Install in accordance with applicable requirements of IEEE, ANSI, and NEC.

B. Refer to specification Section 26 25 13 - Removing and Modifying Existing Equipment for details related to the installation of the five new transformers.

C. The contractor shall install the five new transformers per manufacturer’s recommendation, contract drawings and in accordance with specification Section 26 05 02 - Basic Electrical Materials and Methods..

D. Install the new transformer to accommodate the modified existing isolated phase bus and low voltage bus ducts.

E. Install the five new transformers on their respective concrete foundation:

1. The contractor shall remove the existing yellow handrail and/or yellow stairway handrails which are located next to each KRB and KRC transformers. This will allow for removal of each existing transformer and installation of the new transformers. The contractor shall reinstall the yellow handrails prior to completing the onsite work for each powerplant.

2. Modify existing foundations and transformer pads as necessary for installing the five new transformers.

3. Set and level each transformer’s base on it’s respective foundation.

4. Furnish all anchoring, supporting, and mounting materials required to install each of the five new transformers.

5. Bolt each transformer on its existing foundation per the approved concrete anchor system. Refer to specification Section 05 12 73 Adhesive-Anchored Bolts.

F. Set each of the five transformers plumb and level.

G. Check tightness of all accessible mechanical and electrical connections.

H Modify existing isolated phase bus (HV phase bus) and existing bus duct (LV bus duct), as necessary, to accommodate each new transformer.

I Install and terminate all control cables and conduit for high temperature alarm circuits.

J. The existing annunciator circuits shall be replaced between each of the two KRB transformers and their respective existing junction box. The junction box is located on the exterior wall of the powerplant buildings (Trinity and Spring Creek Powerplants).

Refer to the photos in Section J, Attachment 2.

K Install engraved nameplate on transformer load center.

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L. Ground and bond each of the five transformers in accordance with Section 26 05 20 - Grounding and Bonding.

M. Clean up existing oil spills to the satisfaction of the OGR in the vicinity of the KRB and KRC transformers at each plant in a manner that complies with applicable Federal, State, and local laws and regulations in compliance with Section 02 84 40 - Removal and Disposal of Polychlorinated Biphenyls (PCBs).

3.02 ADJUSTING

A. Witness and Notification: Government will witness final testing of adjustments made.

Provide OGR written notification ten working days in advance of test.

B. Measure primary and secondary voltages and make appropriate tap settings.

C. Adjust taps to deliver appropriate secondary voltage.

D. Check phase rotation of primary and secondary circuits.

3.03 CLEANING

A. Clean transformer interiors to remove construction debris, dirt, and shipping materials.

B. Repaint scratched and marred exterior surfaces to match original finish.

3.04 CONTRACTOR FIELD QUALITY TESTING

A. Provide OGR 10 days' notice of field testing. Report field testing results must be witnessed by OGR.

B. Each transformer test shall be in accordance with the latest version of ANSI/IEEE C57.12.91 and NETA ATS and shall include, as a minimum, the following tests:

1. Insulation Power Factor

2. Ratio

3. Resistance Measurement

4. Phase relation

5. Load loss, impedance, regulation

6. No load loss and excitation current

7. Applied potential test

8. Induced potential test

9. Temperature test

10. Impulse Test - HV only

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11. Angular Displacement

12. Polarity

13. Certified Test Report

END OF SECTION

Removing and Modifying Existing Equipment 26 25 13 - 1

SECTION 26 25 13

REMOVING AND MODIFYING EXISTING EQUIPMENT

PART 1 GENERAL

1.01 PAYMENT

A. Removing and Modifying Existing Equipment:

1. Payment: Include cost in the lump sum prices offered in the Schedules for Removing and Modifying Existing Equipment.

a. Includes cost of all labor, equipment and materials required to remove, modify and/or reinstall existing equipment.

b. Includes cost of disposing of equipment no longer needed for this project.

c. Includes cost of labor, equipment and materials required to modify the existing high voltage isolated phase bus to the new transformer.

d. Includes cost of labor, equipment and materials required to modify the existing line side and load side bus duct to the new low side (enclosed) circuit breaker.

e. Includes cost of labor, equipment and materials required to furnish and install the new remote operation circuits, cable and corresponding conduit.

f. Includes cost of removing existing conduit and cable as well as furnishing and installing new conduit and cable.

g. Includes cost of modifying the existing foundation and transformer pad to accommodate the new transformer.

h. Includes the labor and materials to generate the required removal and modified drawings.

i. Includes the cost of all labor, equipment and materials to remove and dispose of the existing transformer.

j. Includes the cost of labor and equipment to program and calibrate new equipment and existing interface equipment.

1.02 REFERENCES

A. National Fire Protection Association (NFPA)

1. NFPA 70-2014 National Electrical Code (NEC)

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B. Institute of Electrical and Electronics Engineers (IEEE)

1. IEEE C2-2012 National Electrical Safety Code (NESC)

2. IEEE C37.23-2003 Standard for Metal-Enclosed Bus

1.03 RELATED SECTIONS

A. Section 02 83 33 - Removal and Disposal of Equipment with Coatings Containing Heavy Metals

B. Section 02 84 40 - Removal and Disposal of Polychlorinated Biphenyls (PCBs)

C. Section 03 30 00 - Cast-In-Place Concrete

D. Section 26 05 02 - Basic Electrical Materials and Methods

E. Section 26 05 10 - Conductors and Cables

F. Section 26 05 33 - Electrical Conduit

G. Section 31 23 00 - Sand Backfill for Buried Electrical Conduit

H. Section 31 23 60 - Pipe Trench Earthwork

I. Section 31 23 90 - Disposal of Excavated Materials

J. Section 32 12 22 - Asphaltic Concrete Pavement

1.04 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals and Section 01 33 26 - Electrical Drawings and Data.

B. RSN 26 25 13-1, Removal Drawing and Plans:

1. Provide removal plans for existing station service transformers and low voltage buses.

2. Provide detailed drawings showing electrical devices to be removed.

3. Provide details of trenching procedures to be employed with drawing indicating location and depth.

4. Provide narrative of how waste handling submittals required for sections 01 74 00 Cleaning and Waste Management, 02 83 33 Removal and Disposal of Equipment with Coatings Containing Heavy Metals, 02 84 40 Removal and Disposal of Polychlorinated Biphenyls and 31 23 90 Disposal of Excavated Materials will be met. Include details with respect to staging, storing and waste control procedures.

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C. RSN 26 25 13-2, Modification Drawings and Plans: for each location showing modifications for five station service transformers and LV Bus system work to include:

1. Provide plan that details all new, modified and existing devices or structures.

Indicate how they will be modified or replaced with emphasis on the interconnections between new and existing station service system components.

2. Provide drawing and narrative that describes the modification of station service transformer areas at each powerplant site showing details of:

a. Connections between the new transformer(s) and new low voltage buses that show new or modified bus ducts for connections as appropriate.

b. Connections between the new transformer(s) and existing high voltage three phase isolated bus showing new or modified bus ducts for connections as appropriate.

c. Interface and connections between each new 52C circuit breaker and their corresponding remote control switch and indicating lights. The switch and lights shall be located in its respective Control Room. The exact location and control boards shall be determined by the Onsite Government Representative.

D. RSN 26 25 13-3, Modification Drawings and Plans – 480 V: for each powerplant location showing modifications to provide supplemental 480V power source for station service to include:

1. Provide separate modification drawings and narrative of plans for each powerplant site showing modifications unique to that site.

a. Provide details of connection for NCAO 125 KW portable Cummins Generator for the JF Carr and Spring Creek Powerplants.

b. Provide siting, concrete pad construction, trenching procedures, cable and conduit details with location drawing(s) for new engine-generator set at Trinity Powerplant.

c. Provide details and powerplant location drawing(s) for new conduit run from point of entry just outside of powerplant to existing switchgear breaker space ‘1D’ for each powerplant.

1.05 PROJECT CONDITIONS

A. Coatings on the low voltage bus ducts contain lead. Refer to Section 02 83 33 - Removal and Disposal of Equipment Containing Heavy Metals for work requirements.

B. Existing transformers contains mineral based transformer oil with very low levels of PCBs. The following is FYI only. See Section 51 02 84 Oil Test Results for copies of most recent test results. The following is a summary of those tests:

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Transformer Date Performed Level (ppm) Trinity KRB 3/22/2000 2.3 Trinity KRC 3/22/2000 4.9 JF Carr KRC 3/22/2000 3.2 Spring Creek KRB 11/04/2003 1.9 Spring Creek KRC 11/14/2003 2.8 Station Service Spare 8/15/2015 4.5

1.06 DESIGN AND INSTALLATION REQUIRMENTS

A. Design as described in this specification unless approved otherwise in field by COR.

B. If not specifically described in this section design to Reference Standards cited.

PART 2 PRODUCTS

Not Used

PART 3 EXECUTION

3.01 REMOVAL AND DISPOSAL

A. Remove and dispose of five existing transformers including existing electrical equipment mounted on each transformer.

B. Remove and dispose of one existing spare transformer stored at the Spring Creek Powerplant.

C. Remove and dispose of existing low voltage buses and bus ducts from each of the existing five transformers.

D. Remove the four 500 Kcmil cables that were installed on the line and load sides of the 52C circuit breaker between the JF Carr KRB transformer and the station service switchgear circuit breaker 52C.

E. Protect equipment, devices, and other materials to be reinstalled from damage during removal.

F. Contractor’s Responsibilities:

1. Refer to specification Sections 01 74 00 Cleaning and Waste Management, 02 83 33 Removal and Disposal of Equipment with Coatings Containing Heavy

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Metals, 02 84 40 Removal and Disposal of Polychlorinated Biphenyls, and 31 23 90, Disposal of Excavated Materials of this specification.

2. The contractor shall obtain an EPA identification number, in accordance with 40 CFR 262.12 before treating, storing, or transporting hazardous waste.

3. Prepare manifest, in accordance with 40 CFR 262 Subpart B, before transporting hazardous waste for offsite treatment, storage, or disposal.

4. Before transporting hazardous waste, obtain written notice from owner or operator of hazardous waste facility, including documentation that facility has required permits and that facility will accept waste to be shipped under this contract, in accordance with 40 CFR 264.12 and California Waste regulations.

5. Obtain certificate of disposal from disposal facility when hazardous waste has been treated.

6. Obtain required transportation permits.

3.02 MODIFICATIONS OF STATION SERVICE HV AND LV SIDE CONNECTIONS

A. Contractor responsible for electrical system modification or installation shall be licensed as classification type C-10 by the California Contractors State License Board (CLSB).

B. Low voltage buses and bus ducts connected to secondary side of each of the five transformers.

1. See specification Sections 26 22 16 Power Transformer, 26 25 43 600 Volt Non-Segregated Phase Bus, and 26 28 30 Enclosed Circuit Breaker.

2. Furnish and install new bolted duct interconnections between new low voltage bus, five new transformers and/or circuit breaker (as appropriate) and existing station service switchgear.

3. Bus ducts and bus duct connections shall meet IEEE C37 23 requirements.

4. Refer to specification drawings 416-M-000046-50, Y1000-1, and 416-M-000046- 054, Y1001 for existing bus termination details.

C. Replace the four 500 Kcmil cables that were installed on the line and load sides of the existing 52C circuit breaker (located on the load side of the JF Carr KRB transformer), with new rigid bus per 26 25 43 600 Volt Non Segregated Phase Bus.

D. Existing high voltage isolated phase buses connected to primary side of the two new KRB transformers at Trinity and Spring Creek Powerplants transformers.

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1. Disconnect existing high voltage isolated phase buses from each of the existing transformers.

2. Modify the existing high voltage isolated phase buses to accommodate the new KRB transformers.

3. Provide and install new bolted duct interconnections between the modified high voltage isolated phase buses and the two new KRB transformers.

4. Modified bus ducts shall meet IEEE C37. 23 requirements.

5. Refer to specification drawings 416-M-000046-50, Y1000-1, and 416-M-000046- 054, Y1001 for existing bus termination details.

E. Existing high voltage supply lines connected to primary side of new KRC transformers at Trinity, JF Carr, and Spring Creek Powerplants.

1. Design, furnish, install and test new cable, lightning arrestors and potheads for all three phases of the primary side of the three new KRC standby station service transformers. Size cables and devices based on each new KRC transformer's ratings and salient characteristics per specification requirements in Specification Section 26 22 16 Power Transformers.

2. Trinity Powerplant KRC transformer:

a. Refer to specification drawing 416-D-1580 Trinity Powerplant, Electrical Installation, Switch and Take-Off Structure Sections, for details of existing high voltage supply lines at Trinity's KRC transformer.

b. The contractor shall replace approximately 150 feet of 15kV cable, potheads and lightning arrestors for all three phases.

3. JF Carr Powerplant KRC transformer:

a. Refer to specification drawings 416-D-1588 JF Carr Powerplant, Electrical Installation, Transformer Deck Area, 230kV Take-Off Structure, and 416-D-1222 Clear Creek (Aka Judge Francis Carr) Power Plant, Electrical Installation, Transformer Deck-El. 1225.67, Conduit Plan, for details of existing high voltage supply lines at JF CARR's KRC transformer.

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b. The contractor shall replace approximately 250 feet of 15 kV cable,

4. Spring Creek Powerplant KRC transformer:

a. Refer to specification drawing 416-D-1994 Spring Creek Powerplant Transformer Deck 230KV Take-Off Structure–Sections, for details of existing high voltage supply lines at Spring Creek's KRC transformer.

b. The contractor shall replace approximately 150 feet of 15kV cable, F. Existing conduits connected to the five transformers:

1. Contractor shall modify existing conduit as necessary to accommodate the five new transformers.

2. The existing annunciator circuits include all five transformers. Refer to specification Section 26 05 33, Part 3, 3.01.A.

G. Each existing transformer deck structure:

1. Modify existing deck structure such as hand railings as necessary for removal of existing equipment and installation of each new transformer. The existing hand railings will be reused and replaced once each new transformer is in its final location.

2. Modify each existing transformer pad to accommodate its new transformer.

a. For bidding purposes, it is estimated that the contractor shall expand each existing transformer pad with an estimated 50 cubic feet of concrete. This volume shall be verified by the contractor. Refer to Sections 03 30 00 - Cast-in-Place Concrete.

b. The contractor shall include Seismic calculations to meet IBC standard 2012 in each county where each new transformer is to be installed. Refer to RSN 03 30 00-2, Transformer Concrete Pad Design in section 03 30 00 Cast-In-Place Concrete.

H. The two new low voltage side circuit breaker/enclosures (52C), shall be located next to the existing station service switchgear unless otherwise stated. Refer to specification Section 26 28 30 Enclosed Circuit Breaker.

I. At a minimum, the contractor shall provide a drawing showing details of the new low voltage busses, modified high voltage isolated phase buses, connections between each

26 25 13 - 8 new transformer, high voltage line side for each KRC transformers and modified transformer deck structures (if necessary), shall be included as part of the modification plan submitted for approval (RSN 26 25 13-2).

J. Remote Control Switch and Indicating Lights – Remote Operation of each new 52C circuit breaker: The contractor shall design, furnish, install and test a new remote control switch and indicating lights on the existing control board (CSA) located in each corresponding control room. The contractor shall furnish and install the corresponding conduit and cable that will connect this equipment to the new low side 52C circuit breaker (of each KRB transformer). This equipment will have the following salient characteristics:

1. Control Switch shall be rotary cam type with engraved face plates.

a. Pistol-grip handle switch:

1) 600 volts alternating current or direct current.

2) 20 amperes continuous current.

3) Spring return to center type control switch.

b. Contacts: Silver plated and of self-wiping action type.

c. Similar to General Electric type SB-1 switch or equal.

2. Indicating Light Assemblies: lamps shall be replaceable from the front of the existing control board located in the control room.

a. Type: Full-voltage, push-to-test, heavy duty, watertight, oil tight.

b. Voltage: 120 Volts AC/125 VDC.

c. Color: Red indicator lamp for closed position status and green indicator lamp for open position status.

d. Lamp: Full voltage, high visibility LED (Light Emitting Diode).

e. Conform to NEMA ICS.

3. The OGR will confirm the exact location of this control switch and corresponding indicating lights.

4. The contractor shall furnish and install one 12/c – 12 AWG cable from each new 52C circuit breaker to the new control switch and indicating lights located in the control room. The cable shall be XHHW and tray cable (TC) rated. The cable shall be installed in approximately 20 feet of rigid conduit to the nearest

26 25 13 - 9 existing cable tray and run the rest of the way in cable tray to the control room.

The contractor shall field verify the distances and lengths of conduit and cable, between the new 52C circuit breaker and the corresponding control board in the control room, prior to purchasing the required material.

5. The new control switch and indicating lights will be similar to existing equipment located in its respective control room.

6. Refer to Section J, Attachment 5 for final as-built drawings of the JF Carr KRB transformer system. These drawings are For Your Information, and can be used as a guide in regard to the type of drawings that can be submitted for this project.

3.03 MODIFICATIONS OF EXISTING STATION SERVICE SYSTEM TO PROVIDE

SUPPLEMENTAL 480V POWER TO STATION SERVICE SWITCHGEAR.

A. The contractor shall be licensed as classification type C-10 by the California Contractors State License Board (CLSB).

B. Design, furnish and install a new engine-generator set at Trinity Powerplant.

1. The new engine-generator set shall be an Emergency Power Supply System (EPSS). The location of this new EPSS is shown on specification drawings 416-D-530 Trinity Powerplant General Plan and 416-D-959 Trinity Powerplant Grounding System Plan-El. 1928.00.

2. Refer to specification Section 26 32 10 Engine-Generator Set for specification requirements.

3. Design, furnish and install a new trench with cable and conduit from location of new EPSS to area of powerplant indicated. Furnish and install riser from trench to proposed entrance into powerplant. The contractor shall field verify the exact location of the new EPSS and external trench. Refer to specification Sections 31 23 00 Sand Backfill for Buried Electrical Conduit, 31 23 60 Pipe Trench Earthwork, 31 23 90, Disposal of Excavated Materials, and 32 12 22, Asphaltic Concrete Pavement. The contractor shall restore all surfaces (above trench) to as found conditions.

4. Design, furnish, and install conduit and cable sized per NFPA 70 and also as presented in referenced drawings and specifications. Refer to sections 26 05 02 Conductors and Cables and 26 05 33 Electrical Conduit of this specification.

5. Design, furnish, install, and test disconnect switch for the new engine-generator set. The disconnect switch shall be located in-line of sight of the engine-generator and per NFPA 70. Refer to specification Section 26 28 30 Enclosed Circuit Breaker.

C. Design, furnish, install, and test connections for the existing portable generator at JF Carr and Spring Creek Powerplants. The contractor shall furnish and install the corresponding

26 25 13 - 10 exterior and interior cables and conduit at all three powerplants. For bidding purposes, the contractor shall estimate 150 feet of conduit and cable. The Onsite Government Representative shall confirm the exact conduit and cable run after Award of the Contract.

Also, the contractor shall field veify the length of conduit and cable after Award of the Contract.

1. Design, furnish, install, and test the new connection devices to be located at the JF Carr and Spring Creek powerplants. Refer to specification Section 26 28 30 Enclosed Circuit Breakers; Part 2, 2.03 “Circuit Breakers: ‘52S Manual’.

2. Design, furnish, install and test new connection devices to be located at the JF Carr and Spring Creek powerplants Refer to specification Section 26 28 30 Enclosed Circuit Breakers; Part 2, 2.03 “Circuit Breakers: ‘52S Manual’.

3. Design, furnish, install and test new conduit and cable from the new engine-generator set and riser into Trinity powerplant's existing station service switchgear. This will allow the existing switchgear to automatically control the new engine-generator set. Refer to specification Section 26 28 30, Part 2, 2.04 “Circuit Breakers: ‘52S Auto’.

4. The contractor shall furnish and install the conduit and cable's exterior-to-interior sealed transition. Proposed entry locations are noted in drawings 416-208-3555, 416-208-3556, and 416-208-3557 ‘480Vac Station Service Switchgear Conduit Plan’ for Trinity, JF Carr and Spring Creek Powerplants respectively.

3.04 REPAIR OR RESTORATION

A. Repair floors, walls, and ceilings damaged during removal of equipment and materials to match surrounding surfaces.

B. Replace or repair equipment, devices, or surfaces damaged during performance of work.

C. Paint repaired areas of sheet metal to match surrounding metal.

D. Repair and plug or seal all holes made in equipment with suitable sealing material and repair paint.

E. Restore areas to be trenched to as found condition.

Enclosed Circuit Breakers 26 28 30 - 1

SECTION 26 28 30

ENCLOSED CIRCUIT BREAKERS

PART 1 GENERAL

1.01 PAYMENT

A Enclosed Circuit Breakers:

1. Payment: Include cost in the lump sum prices offered in the Schedules for Enclosed Circuit Breakers. Include the total cost of all circuit breakers types defined in this section including:

a. Cost of extra materials; special tools.

b. Cost of labor, material and equipment required for the enclosed circuit breakers and corresponding enclosure of applicable.

c. Cost of labor, material and equipment required for control devices, monitoring devices, relay protection and electrical devices for the circuit breaker assembly as applicable.

d. Cost of labor, material and equipment required for the NEMA 1 enclosure of the circuit breaker if applicable.

e. Cost of labor, material and equipment required for nameplates, accessory devices, fabrication and finish of the circuit breaker and enclosure if applicable.

f. Cost of labor, material and equipment required for conduit and cables internal to the circuit breaker and enclosure if applicable.

g. Cost of labor, material and equipment required for connections to the line side and load side circuits for the circuit breaker assembly.

h. Cost of contractor’s source quality testing.

i. Cost of furnishing and installing the circuit breakers, enclosure and associated equipment.

j. Cost of design and commissioning of new systems as defined in this section.

k. Cost of labor, material and equipment required to make electrical connections to equipment and devices.

l. Cost of labor and equipment required to program and calibrate new equipment and existing interface equipment.

26 28 30 - 2

1.02 REFERENCE STANDARDS

A. American National Standards Institute (ANSI)

1. ANSI C37.50-2012 Low-Voltage AC Power Circuit Breakers Used in Enclosures Used in Enclosures: Test Procedures

B. Institute of Electrical and Electronic Engineer (IEEE)

1. IEEE C37.13-2008 Standard for Low-Voltage Power Circuit Breakers

2. IEEE C37.16-2009 Low-Voltage Power Circuit Breakers and AC Power

3. IEEE C37.17-2012 Trip Systems for Low-Voltage AC and General Purpose DC Power-Circuit Breakers

C. National Electrical Manufacturers Association (NEMA)

1. NEMA 250-2008 Enclosures for Electrical Equipment (1000 Volts Maximum)

2. NEMA SG3-1995 Low Voltage Power Circuit Breakers - Power Power Switching Equipment

D. National Fire Protection Association (NFPA)

1. NFPA 70E-2014 National Electric Code (NEC)

E. Underwriters Laboratories, Inc. (UL)

1. UL 1066-2012 Standard for Safety Low-Voltage AC and DC Power

a. Circuit Breakers Used in Enclosures

1.03 DESIGN REQUIREMENTS

A. Three different types of circuit breakers for use with the existing station service switchgear will be defined in this section. There will be a total of five new circuit breakers manufactured by Eaton. Each circuit breaker will either interface (two 52C circuit breakers) to or be installed in (two 52S Manual circuit breakers and one 52S Auto circuit breaker) the existing Eaton Station Service switchgear (Trinity, JF Carr and Spring Creek Powerplants).

B. Two low voltage side circuit breakers, Arc Flash mitigation devices, and enclosures ('52C' system), shall be provided for the KRB transformers (normal supply side of existing Station Service system) at Spring Creek and Trinity Powerplants only. The new 52C circuit breakers will require dedicated enclosures placed on the right side (facing the front of the switchgear) of the existing station service switchgear at each powerplant.

1. The two new 52C circuit breakers will interface with the new low voltage side bus ducts. The line side will be supplied from the new KRB transformers and the load

26 28 30 - 3 side shall connect to the existing station service switchgear at the Spring Creek and Trinity Powerplants.

2. The two new 52C circuit breakers shall have remote operation from its corresponding control room.

C. Two new circuit breakers shall be added at the JF Carr and Spring Creek Powerplants in the existing station service switchgear. These breakers will control temporary portable power supply and are referred to as '52S manual' breakers.

1. At the start of the project, the 52S circuit breakers shall be installed at the Trinity, JF Carr and Spring Creek powerplants (in the existing switchgear). Once the 52S circuit breakers are installed, the contractor shall proceed to the demolition and installation of the station service transformers and low voltage buses described in this specification.

D. One new circuit breaker shall be added at the Trinity Powerplant in the existing station service switchgear. This breaker is to control/interface to the existing automatic power system and is referred to as '52S auto' breaker.

1.04 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals and Section 01 33 26 - Electrical Drawings and Data.

B. Provide the following for each circuit breaker type required and for each powerplant location.

C. RSN 26 28 30-1, Approval Drawings and Data:

1. Manufacturer’s Technical Catalog Data.

2. Equipment layout drawings.

3. Commissioning procedures.

D. RSN 26 28 30-2, Factory Test Reports:

1. Certified test reports.

E. RSN 26 28 30-3, Operation and Maintenance (O&M) Instruction Books:

1. Provide in accordance with Section 01 33 26 - Electrical Drawings and Data.

2. Installation and operating instructions, maintenance, troubleshooting and repair procedures and technical literature pertaining to all components or instruments provided.

F. RSN 26 28 30-4, Field Test Reports:

1. Provide in accordance with Section 01 33 26 - Electrical Drawings and Details.

26 28 30 - 4

G. RSN 26 28 30-5, Final Drawings:

1. Circuit Breaker installation and location drawings. Provide for each type of enclosed circuit breaker provided at each powerplant.

2. Shop drawings.

3. Provide computer drawing files on CD-ROM disc in AutoCAD (*.dwg) 2014 version or newer.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Handle in accordance with manufacturer’s recommendations.

B. Store in clean, dry, secure space. Protect from spills or other moisture by using appropriate coverings.

PART 2 PRODUCTS

2.01 ADDITION TO EXISTING STATION SERVICE SWITCHGEAR

A. Design, furnish, install, program, calibrate and test five new Eaton circuit breakers and associated devices which are compatible with the existing Eaton station service switchgear (for all three power plants; Trinity, JF Carr and Spring Creek).

1. All five circuit breakers shall be installed adjacent to or part of the existing station service switchgear.

a. Details of the existing station service switchgear are provided in the following drawings.

1) 416-214-6209: Trinity Powerplant D1A Switchgear Assembly

2) 416-214-6175: JF Carr Powerplant D2A Switchgear Assembly

3) 416-214-6176: JF Carr Powerplant D2A Switchgear Unit Schedule

4) 416-214-6139: Spring Creek Powerplant DSA Switchgear Assembly

5) Existing Eaton Switchgear - Operations and Maintenance Instruction Manual and related information will be provided as required after award.

2. The contractor shall program and calibrate the existing station service equipment via the existing Eaton programmable logic controller (also referred as Eaton Logic Controller (ELC)). The contractor shall interface new devices to existing devices.

26 28 30 - 5

3. The following contact information is provided to assist bidder estimation of required project.

a. Eaton Corporation Directory of Eaton Electrical products: (800) 525-2000

b. Eaton Corporation On-site field service, commissioning & maintenance:

(800) 498-2678

2.02 LOW VOLTAGE SIDE ENCLOSED CIRCUIT BREAKERS: 52C

A. Design, furnish, install, program, calibrate and test two low voltage circuit breakers (52C) and associated enclosures to interface to the new KRB transformers (normal supply side of Station Service system) and the existing Eaton station service switchgear. These breakers will be located at Spring Creek and Trinity Powerplants. Refer to specification drawings 416-214-6139 and 416-214-6209.

B. 52C Circuit Breaker Ratings and Salient Characteristics: The 52C circuit breakers to be installed at the Trinity and Spring Creek Powerplants shall have the following salient characteristics:

1. Main Breaker

a. Model: Eaton Magnum DS Drawout MDS-616

b. Device Size: 1600 A

c. Poles: 3

d. KAIC Rating: 65

e. LSIG Trip Unit: LSIG (long time, short time, instantaneous, ground fault and maintenance Mode) Trip Unit:

1) Long Delay

2) Short Delay

3) Ground Fault Protection

4) Instantaneous

5) Maintenance Mode (Arc Flash Reduction Maintenance Switch (ARMS)) shall be designed utilizing Eaton Digitrip 530MC with Maintenance Mode

a) Design so that the Maintenance Mode feature is engaged via switch.

b) Provide blue LED that lights when Maintenance Mode active.

c) Provide LED to indicate a Maintenance Mode trip.

f. Rating Plug: 1600 A

g. Accessories for Remote Operation:

26 28 30 - 6

1) Spring-charging motor (MCH) – 125 VDC

2) Provisions for hard-wired trip and close at 125 VDC:

a) Shunt Close (XF): Standard – 125 VDC

b) Shunt Trip (MX1): Standard – 125 VDC

3) Electrical closing push button (BPFE)

4) Remote Pendent

5) Wired for and includes a remote control switch with two corresponding position indicating lamps. The purpose of these devices is to control its corresponding low side 52C circuit breaker from the control room. Refer to specifications Section 26 25 13 - Removing and Modifying Existing Equipment.

h. Zone Selective Interlock

i. Spring Release (Close Coil): Yes

j. Device Motor Operation: Electric

k. Auxiliary Switch: 4A/4B

k. Deleted

l. Breaker Cell Position Switch: Yes

m. Bell Alarm (Overcurrent Trip Switch): Yes

n. Key Interlock: No

o. Termination-Power cable entry direction: Bottom

p. Type: M, Mechanical CU/AL

q. Phase and Neutral Size 4-copper connections to existing Eaton switchgear on new 600-Volt Enclosed Non-Segregated Phase Bus.

r. Number per Phase: 5

s. Number per Neutral: 5

t. Ground Size: 5-copper connections to existing Eaton switchgear or new 600-Volt Enclosed Non-Segregated Phase Bus.

u. Number per Ground: 1

v. Shunt Trip: Volts, 100-127 vac/VDC

w. Lockout Devices: Padlockable Hasp

x. Control Switch with indicating lights for electrically operated breaker

y. Cell position switch

z. Lever in crank

26 28 30 - 7

2. Incoming Lugs:

a. Termination-Power cable entry direction: Top

b. Type: M, Mechanical CU/AL

c. Phase and Neutral Size 4-copper connections to existing Eaton switchgear or new 600-Volt Enclosed Non-Segregated Phase Bus.

d. Number per Phase: 5

e. Number per Neutral: 5

3. Blank Cover: 30 inches

4. Handle that is padlockable in OPEN/OFF position.

5. Conform to UL listed.

2.03 CIRCUIT BREAKERS: 52S Manual

A. Design, furnish, install, program, calibrate and test two new circuit breakers.

B. These breakers shall be located at the JF Carr and Spring Creek Powerplants.

1. Contractor shall install in the existing Eaton Magnum DS station service switchgear.

2. Install the two circuit breakers in the corresponding switchgear; space 1D. Refer to specifications drawing 416-214-6176.

C. The two new circuit breakers shall be sized so that they can be used with the existing 125 kVA portable generator. These breakers will also be adjustable and include the capacity to support up to 300 kVA portable generator in the future.

D. Both circuit breakers shall be bi-directional; capable of receiving supply from the generator on the normally ‘load’ side of the breaker, and providing power to the normally ‘line’ side of breaker.

E. The breakers shall be Eaton breakers. The contractor shall size each breaker based on the specification…