IFB - 3000012109 - SOW for Prepurchased Med Voltage Switchgear.pdf

UNIVERSITY

of NORTH CAROLINA at CHAPEL HILL

Chilled Water Infrastructure Expansion North Chiller Plant SCO ID 22-25588-02F, Code: 42123-355 / 42323-305 UNC Bldg. No. 227

Prepurchased Electrical Equipment Medium Voltage Switchgear Bid Set

Submitted by:

1414 Raleigh Road, Suite 305 Chapel Hill, North Carolina 27517

(919) 419-9802 License No. C-2982

AEI Project No. 23480-01

October 18, 2024

UNC – Chapel Hill Table of Contents CHW Infrastructure Expansion - NCP TOC - 1

10/18/24

TABLE OF CONTENTS

SPECIFICATIONS

SECTION TITLE

26 1319 Medium-Voltage Vacuum Interrupter Switchgear 26 1319.1 DC Battery System 26 2412 Electrical Walk-in Equipment Enclosure

DRAWINGS

SHEET TITLE

N.E.600 Switchgear Elevation & Detailed Single Line Diagram Symbols, Abbreviations, &

Details N.E.601 Electrical Equipment Elevation & Enclosure Layout N.E.602 Detailed Single Line Diagrams N.E.603 Typical Main Breaker Control Schematic & Control/Comm Power Schematic N.E.604 Tie Breaker Control Schematic & Bus Differential N.E.605 Typical Feeder Breaker Control Schematic

END OF TABLE OF CONTENTS

UNC – Chapel Hill Medium-Voltage Vacuum Interrupter Switchgear

CHW Infrastructure Expansion – NCP 26 1319 - 1

Prepurchased Electrical Equipment

10/18/24

SECTION 26 1319

MEDIUM-VOLTAGE VACUUM INTERRUPTER SWITCHGEAR

PART 1 - GENERAL

1.1 OWNER PRE-PURCHASED EQUIPMENT

A. This equipment will be pre-purchased by the Owner and assigned to the successful

Contractor after award expediting delivery and installation.

B. Owner will make available shop drawings of Owner pre-purchased equipment for review. Contractor shall review shop drawings to ascertain that Contractor has included necessary labor and materials to install equipment and complete system it serves.

C. Contractor shall be responsible for arranging/coordinating delivery of equipment and all other activities as if the Contractor purchased the equipment directly. This includes directing the delivery truck to the jobsite, coordinating the date and time of delivery, receipt/unloading of the equipment at the jobsite.

D. Contractor shall install equipment and all auxiliaries as though Contractor had purchased equipment. This shall include, but not be limited to; rigging and setting equipment in place, making connections, starting, testing and installing equipment in accordance with manufacturer's recommendations, and maintaining equipment until such time as project is accepted by Owner. Perform all work and provide materials and connections for Owner furnished equipment in accordance with drawings and scope of work under all related specifications.

E. After completion of equipment installation, assemble equipment shop drawings, operating/maintenance instructions and part lists into the Contractor's project operation/maintenance manuals.

F. The following summarizes the general responsibilities of the electrical equipment supplier:

1. Provide shop drawings and submittal data.

2. Manufacture and delivery of equipment including coordination of exact delivery date and supervision of rigging, unloading and setting.

3. Lead equipment check-out, testing and start-up process.

4. Provide Owner training.

5. Provide O&M documentation.

CHW Infrastructure Expansion – NCP 26 1319 - 2

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1.2 SCHEDULE

A. Schedule:

The following schedule is anticipated relative to the pre-purchased equipment delivery, installation and activation. This is a preliminary schedule and exact dates are to be coordinated with the Owner and Contractor.

a. Equipment Delivery: November 2026

b. Installation, Start-Up & Commissioning: November 2026 – February 2027

B. Manufacturer shall be able to produce, test and deliver the equipment (FOB) to a location dictated by the Contractor per the schedule described above.

1.3 DESCRIPTION

A. The switchgear lineup shall be free-standing, dead-front type, metal-clad medium-voltage distribution switchgear. The switchgear shall be Arc-Resistant Type 2B per ANSI/IEEE C37.20.7. The lineup shall contain the necessary number of monitoring, control modules and distribution modules (sections), including optional accessories. The switchgear shall be a NEMA rated cabinet construction, for indoor applications.

B. Arc Resistant Type 2B definition: Arc-resistant accessibility is designated for equipment where isolation is required for the instrument compartment and arcing does not cause holes in the freely accessible front, sides, and rear of the enclosure or in the walls isolating the low-voltage control or instrument compartment(s). Smoke ingress in the compartment under evaluation is acceptable. Partial or total distortion of internal compartment walls, without signs of burning from a direct arc strike (i.e., a hole) or openings in the walls (i.e., torn seams) are acceptable. The application of suffix “B” to accessibility type 2 requirements additionally qualifies the equipment for installation of instrument and control devices on the door or cover of the compartment tested without retesting the switchgear for the condition where the door or cover is present with devices mounted on it.

1. Relay and meter Owner preferred brand alternate: SEL.

a. Acceptable alternate manufacturers: Schneider Electric, ABB

2. Refer to the drawings for schematics on relay and communications system architecture for the switchgear system(s).

3. This section is for new 15kV switchgear “MAIN SWGR #1”.

4. The switchgears shall have monitoring and control integrated into the existing UNC SCADA system cabinet located in the building. Provide all work to connect to that Owner furnished head-end equipment and provide support to the Owner for programming and start-up.

C. Provide associated VDC battery system per Section 26 1319.1.

D. Equipment shall be located within a walk-in equipment enclosure per Section 26 2412. New switchgear lineup and enclosure shall be aligned exactly with existing conduit stub-ups.

CHW Infrastructure Expansion – NCP 26 1319 - 3

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E. Provide programming of all relays and meter mounted within switchgear. Program devices to coordinate with instrumentation and I/O. Designer shall provide protective function settings and output logic for close permissive and trip signals to Switchgear manufacturer for inclusion in programming of relays. Upon acceptance of relay file configuration and testing, relay files shall be further augmented by relay manufacturer, contracted separately by Owner, to program relays for use in automation and integration into the campus SCADA.

F. This equipment shall be fully commissioned per the requirements in the North Carolina State Construction Office 2020 Electrical Guidelines and Policies Section 260800 and per ANSI/NETA ECS-2015. The Owner will contract directly with the commissioning agent separate from the General Contractor. Equipment supplier shall provide commissioning assistance during shop drawing submittal reviews, equipment inspections, equipment start-up and commissioning. Equipment supplier shall assist with coordinating the scheduling of commissioning activities as directed by the commissioning agent.

1.4 REFERENCE STANDARDS

A. ANSI/IEEE C37.20.2

B. ANSI/IEEE C37.20.7

C. NEMA C37.57

D. ANSI/IEEE C62.11

E. NEMA SG5

F. NEMA SG6

1.5 BID SUBMITTALS

A. Submit all equipment procurement documents, including shop drawings and technical specifications to the State Construction Office for review and approval, in addition to the engineer of record.

B. Cover letter with compliance table listing each specification section and indicating compliance “C”, deviation for alternate “D”, or exception with explanation “E”. Any deviation or exception shall be accompanied with detailed explanation of how design intent is being upheld.

C. Complete Bill of Materials

D. Product Data: for switchgear, major components, relay/meter components, and options/accessories indicated:

E. General Shop Drawings:

1. For switchgear specified in this Section:

a. One Line Diagrams for both power and instrumentation & controls.

b. General Arrangement:

CHW Infrastructure Expansion – NCP 26 1319 - 4

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1) Indicate front, plan, and side views of switchgear; overall dimensions and components list; shipping splits and weights.

2) Front elevation indicating location of devices and instruments.

3) Sections through switchgear showing space available for conduits.

4) Indicate conduit windows for new switchgear lineup as well as existing conduit stub-ups.

c. Conduit entrance locations and requirements

d. Configuration, size and number of bus bars for each phase and current rating of buses

e. Ground bus.

f. Short circuit and withstand ratings of switchgear and overcurrent protective devices.

g. Instrument details.

h. Arc Flash ducting system.

F. System Mechanical Drawings:

1. Dimensional plans and elevations, with front view, side views and other pertinent elevation views.

2. Conduit entrance locations and dimensions within all assemblies for both bottom and top entrance.

3. Door details.

4. Circuit breaker ratings.

5. Weight of equipment.

6. Assembly ratings including:

a. Short circuit rating

b. Voltage

c. Continuous current

7. Cable terminal sizes.

8. Base plan showing dimensions of base with anchoring provisions.

1.6 FABRICATION SUBMITTALS

A. All information from the Bid Submittal per Section 1.4 to include any updates to the development of any of the information.

B. Product Data: for switchgear, components and accessories indicated:

1. Include data on features and components and complete description; submit catalog cut sheets with selected features highlighted.

2. Complete wiring diagrams.

C. General Shop Drawings:

1. For switchgear specified in this Section:

a. General Arrangement:

1) Indicate front, plan, and side views of switchgear; overall dimensions and components list; shipping splits and weights.

CHW Infrastructure Expansion – NCP 26 1319 - 5

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2) Front elevation indicating location of devices and instruments.

3) Sections through switchgear showing space available for conduits.

b. Conduit entrance locations and requirements including existing conduit stub-ups.

c. Nameplate legends

d. Configuration, size and number of bus bars for each phase and current rating of buses

e. Ground bus.

f. Short circuit and withstand ratings of switchgear and overcurrent protective devices.

g. Instrument details; enclosure types and details

h. Wiring diagrams: power, signal and control wiring

i. Mimic-bus diagram; samples: representative portion of mimic bus with specified finish, for color selection.

D. System Mechanical Drawings:

1. Dimensional plans and elevations, with front view, side views and other pertinent elevation views.

2. Conduit entrance locations and dimensions within all assemblies for both bottom and top entrance.

3. Door details.

4. Circuit breaker ratings.

5. Weight of equipment.

6. Assembly ratings including:

a. Short circuit rating

b. Voltage

c. Continuous current

7. Cable terminal sizes.

8. Base plan showing dimensions of base with anchoring provisions.

E. System Electrical Drawings:

1. Typical AC Three-Line Schematic diagrams with all components cross referenced.

2. Typical DC Schematic diagrams with all components cross referenced.

3. Typical equipment interconnect drawings showing terminal points and external device function.

4. Metering/monitoring and LV wiring scheme.

F. Manufacturer's Installation Instructions:

G. Indicate application conditions and limitations of use stipulated by product testing agency. Include instructions for storage, handling, protection, examination, preparation, installation, and starting of product.

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H. Test Reports: Indicate field test and inspection procedures and interpret test results and corrective action taken for compliance with specification requirements.

I. Closeout Submittals:

1. Project Record Documents:

a. Record actual locations, configurations, and ratings of switchgear and major components on single-line diagrams and plan layouts. Provide exact circuit breaker models and associated trip units.

2. Operation and Maintenance Data:

a. Include manufacturer's recommended operating instructions, maintenance procedures and intervals, and preventive maintenance instructions.

b. Include manufacturer's written instructions for testing and adjusting overcurrent protective devices.

c. Include spare parts data listing, source, and current prices of replacement parts and supplies.

1.7 QUALITY ASSURANCE

A. Obtain switchgear from one source and by single manufacturer.

B. Regulatory Requirements:

1. Comply with NFPA 70 for components and installation.

2. Furnish products listed and classified by a third party agency amongst those acceptable to the NCBCC (North Carolina Building Code Council) to Label Electrical & Mechanical Equipment.

C. Factory Witness Test

1. Provide separately priced quote for factory witness test to include four representatives from the Owner, two representatives from Designer (six persons total). The quote shall include all costs for travel, lodging, meals, etc. for the duration of the trip. The testing time and date(s) shall be scheduled at least 21 days prior the test. Provide test script plan for the factory witness test for approval at least 14 days prior to the test. The test script plan shall include all required testing per this specification in addition to standard manufacturer testing.

2. The factory test (regardless if separately priced quote for witness test is accepted) shall include the following:

a. Inspection and comprehensive check of all circuit breakers, fuses, protective relays, instrument transformers, metering, etc.

b. Testing of switchgear and its components per NETA.

c. Testing of all metering/monitoring and local LCD display.

d. Testing of all local alarms.

1) Additional test procedures as directed by the Designer.

CHW Infrastructure Expansion – NCP 26 1319 - 7

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1.8 DELIVERY, STORAGE, AND HANDLING

A. Store in clean, dry space. Maintain factory wrapping or provide additional canvas or plastic cover to protect units from dirt, fumes, water, corrosive substances, construction debris, and traffic. Provide temporary heaters in switchgear as required to prevent condensation.

B. Deliver switchgear in 48" maximum width shipping splits that can be moved in delivery path, individually wrapped for protection, and mounted on shipping skids. Mark crates, boxes, and cartons clearly to identify equipment. Show crate, box, or carton identification number on shipping invoices. Coordinate with manufacturer of electrical walk-in enclosure (Specification 26 2412) to deliver switchgear to electrical walk-in enclosure manufacturing facility such that switchgear can be installed within walk-in enclosure. Switchgear shall be shipped within the walk-in enclosure to the construction site.

C. Handle switchgear in accordance with applicable portions of ANSI/NECA 400. Use factory-installed lifting provisions. Handle carefully to avoid damage to switchgear internal components, enclosure, and finish.

1.9 WARRANTY

A. Manufacturer shall provide two year warranty against defects in materials and workmanship for products specified in this Section. Warranty period shall begin on date of final acceptance.

B. Switchgear manufacturer shall have an established network of factory owned and operated service centers within the continental US capable of servicing the specified equipment.

C. The manufacturer's personnel shall be factory trained and certified in the maintenance and repair of the specified equipment.

D. After-warranty service contracts shall be available to the owner by the manufacturer to provide periodic maintenance and/or repair of the specified equipment

1.10 MAINTENANCE

A. Extra Materials: Furnish extra materials described below that match product installed, are packaged with protective covering for storage, and are identified with labels describing contents.

1. Potential Transformer Fuses: Equal to 10% of amount installed for each size and type, minimum of two of each size and type.

2. Control-Power Fuses: Equal to 10% of amount installed for each size and type, minimum of two of each size and type.

3. Indicating Lights: Furnish 6 of each type required. Equal to 10% of amount installed for each size and type, but no fewer than two of each size and type.

CHW Infrastructure Expansion – NCP 26 1319 - 8

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PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Basis of Design: Powell – PowlVac-AR

B. Acceptable Alternates: ABB SafeGear, Point 8 Power

2.2 RATINGS

A. Nominal System Voltage: 12470V 3-phase, 3 wire, grounded, 60 Hz.

B. Rated maximum Voltage: 15 kV

C. Basic Impulse Level: 95 kV.

D. Main Bus Ampacity: as shown on the drawings, continuous.

E. Short Circuit Current Rating: 25 kA, rms sym

F. Vacuum Circuit Breaker:

1. At Rated Maximum kV - Closing and Latching Capability: 67 kA Crest

2. Three Second Rating: 25 kA

3. Rated Interrupting Time: 3 cycles

G. Bus shall be silver plated copper.

H. Bus shall have epoxy flame-retardant and track-resistant insulation

I. Provide a copper ground bus.

2.3 CONSTRUCTION

A. Switchgear Arc-Resistant Assembly – Basic Type 2B Construction:

1. Metal-clad construction using welded, industrial revited.

2. Self-supporting, mounted within walk-in enclosure by walk-in enclosure manufacturer.

3. Front Compartment Doors:

a. Each compartment housing a high voltage device shall be provided with steel hinged doors.

b. Door shall be provided with means to padlock

c. Door shall be provided with a viewing window in view of circuit breaker position.

d. Door shall withstand arc fault.

e. Door shall be provided with handle to operate all required latching.

f. Door shall be provided with safety interlocks to prevent racking breaker into a compartment with door in open position and to prevent opening of door unless breaker is in the disconnected position. There shall be manual interlock override for maintenance purposes. Interlock shall be automatically reset when door is in closed position.

CHW Infrastructure Expansion – NCP 26 1319 - 9

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g. The breaker shall be able to be disconnected and racked out with the door in the closed position.

4. Rear Compartment Doors:

a. Do not provide rear compartment doors on switchgear lineup. Switchgear shall be installed in electrical walk-in enclosure (Section 26 2412) with exterior doors aligned with switchgear sections.

5. Plenum:

a. Provide plenum over the entire length of the assembly to direct arc fault pressure wave, gases, etc out the top of each section, through the plenum and out the rear wall of the walk-in enclosure.

b. Plenum shall be constructed of heavy gauge steel.

6. Provide mimic bus. Continuously integrated mimic bus factory applied to front of switchgear. Arrange in single-line diagram format showing bussing, connections and devices, using symbols and letter designations consistent with final mimic-bus diagram. Use black color plastic strips, fastened flat against panel face with corrosion-resistant screws and rivets. Coordinate mimic-bus segments with devices in switchgear sections to which they are applied. Produce concise visual presentation of principal switchgear components and connections.

7. The assembly (including the bussing) shall be capable of future extension from either end for additional cabinets installed to maintain the integrity of the arc-resistant construction.

8. Any cooling or ventilation openings or vents shall conform to arc-resistant construction such that contact will not create a hazard to persons of the integrity of the system.

B. Contacts:

1. Provide silver-plated copper stationary primary contacts.

a. Provide minimum two spare NO/NC contacts.

2. Provide automatic steel shutter cover stationary primary contacts when breaker is in disconnected position or out of cell.

a. Provide minimum two spare NO/NC contacts.

C. Provide rails to withdraw 15kV circuit breaker.

2.4 BUS

A. Bus Phase:

1. Silver-plated Copper

2. Amperage as shown on the drawings.

3. Have epoxy flame-retardant and track-resistant insulation/

4. Have provisions for future extension.

B. Bus joints to be plated, bolted, and insulated with easily installed boots.

C. Bus supports to be flame-retardant, track-resistant, glass polyester for 15kV class.

CHW Infrastructure Expansion – NCP 26 1319 - 10

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D. A copper ground bus, to which the entire metallic enclosure is solidly connected, shall extend through the length of the switchgear. The ground bus shall be accessible in the cable compartment and shall have connection points in each switchgear section.

2.5 WIRING TERMINATIONS

A. Control wiring 600 volt, UL 1015 or SIS. Use solderless compression screw type connectors for terminating all wires. Current transformer circuit terminations shall be ring tongue compression type. Other circuits shall be ring tongue compression type where feasible, otherwise they shall be spade type applied with the proper tooling.

B. Label control wiring with wire markers.

C. Control wires shall be numbered every six (6) inches and visible next to the terminals.

Low level signal circuits shall be provided with shielded wire to minimize electromagnetic interference. Shielded wire grounded at one point.

D. Current transformer circuits are connected through shorting terminal blocks.

E. Control wiring routed in enclosed raceway through high-voltage compartments, and isolated per arc-resistant Type 2B requirements.

F. Voltage transformer primary wiring shall be 15kV insulated.

G. Provide small wiring, terminal blocks, and fuse blocks within vertical section.

H. Provide minimum of 10% spare terminal connections.

I. Incoming/Outgoing Medium Voltage Cabling:

1. A termination bus shall be provided from the circuit breaker or switchgear primary disconnects to a location that allows cable connections to other equipment. Bus connections to cables shall be rigid.

2. Termination bus arrangement shall allow at least 36 inches for primary cable terminations and stress cones. The self-cooled rating of the termination bus shall be in accordance with ANSI C37.20.2, Table 4 at 45 deg C.

3. Provide wire termination system such that no additional cable bracing, tying or lashing is required to maintain short circuit withstand rating of assembly.

4. Equip each cubicle section that contains lugs for incoming and/or outgoing feeders with horizontal cable supports.

5. The equipment shall be arranged for bottom entrance.

6. Provide cable lug boots.

7. Provide compression lugs of size to match cable size and quantity indicated on drawings. This shall be coordinated during the shop drawing review process.

2.6 CIRCUIT BREAKERS

A. Circuit Breakers

1. Horizontal draw out type.

2. Electrically operated

CHW Infrastructure Expansion – NCP 26 1319 - 11

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a. Provide 125VDC close and capacitor trip control voltages. Note that controls circuit shall be derived from external battery plant.

3. Operate by a motor-charged stored energy spring mechanism.

a. Charge spring mechanism normally by universal electric motor and by hand mechanism in emergency situations.

b. Provide primary disconnecting contacts of silver-plated copper.

4. Contain 3 vacuum interrupters separately mounted.

a. Mount vacuum interrupter on glass polyester supports for 15kV class.

b. Provide a contact wear gap indicator for vacuum interrupters.

1) Indicator shall not require tools to indicate available contact life.

2) Indicator to be visible when breaker is removed from its compartment.

3) Current transfer from vacuum interrupter moving stem to breaker main conductor to non-sliding design.

c. Breaker front panel to be removable when breaker is withdrawn.

5. Control switch and red and green indicating lights to indicate breaker contact position.

6. Be secured in housing between and in the operating and test positions.

B. Provide silver-plated secondary contacts that automatically engage in breaker operating position.

a. Provide minimum two spare NO/NC contacts.

C. Provide interlocks to:

1. Prevent closing of breaker between operating and test positions

2. Trip breakers upon insertion or removal from housing

3. Discharge stored energy mechanisms upon insertion or removal from the housing.

D. Refer to drawings for design intent of breaker control schematics and interaction with protective relays and auxiliary devices.

2.7 SURGE ARRESTERS

A. Provide 3 surge arrestors as indicated on drawings.

B. Distribution Class

C. Surge arresters to be rated at 15 kV nominal, 12.7kV maximum continuous operating voltage (MCOV).

2.8 PROTECTIVE RELAYS

A. Provide quantity, type and rating of protection relays as indicated on drawings.

B. Basis of design devices listed below. Refer to Section 1.3.B.1.a for acceptable alternate manufacturers.

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C. Three-Phase Protective Relays - Applicable to Relays identified as Mains, Ties and Feeders on the drawings:

1. Preferred Brand Alternate: Manufacturer: SEL-351S, Model Number:

0351S7X3D3J54X1 (351S#B6RL).

a. Acceptable alternate manufacturers: Schneider Electric, ABB

2. Indoor Open/Close Push Buttons

3. True RMS sensing of each phase and ground

4. Solid-state microprocessor-based multi-functional type

5. ANSI 25 Synchronism Check

6. ANSI 50/51 Instantaneous over-current and Time over-current

7. ANSI 50/51G Residual Ground Instantaneous over-current and Time over-current

8. ANSI 27 Under voltage

9. ANSI 32 Power Element

10. ANSI 59 Overvoltage

11. ANSI 81 Over/Under Frequency

12. Built-in alphanumeric display:

a. Individual phase currents

b. Ground current

c. Cause of trip

d. Magnitude and phase of current causing trip

e. Peak current demand for each phase and ground since last reset

13. Metering Capabilities:

a. Current: IA, IB, IC, IG, IN

b. Voltage: VA, VB, VC, VN, VAB, VBC, VCA

c. Power: kW, kVAR, kVA

d. Energy: MWh, MVARh, MVAh

e. Power Factor

f. Frequency

14. Input Contacts wired internally by Switchgear Manufacturer

a. 52A – Breaker Closed

b. 52B – Breaker Open

c. 52H – Breaker Withdrawn

d. Trip Coil Monitor

e. 86 Trip Coil Monitor (Mains and Ties Only)

f. Non-used inputs wired to terminal block.

15. Output Contacts wired internally by Switchgear Manufacturer

a. Breaker Close

b. Breaker Open

c. Breaker Protective Function Trip

d. 86 Trip (Mains and Ties Only)

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e. Close Circuit Permissive (Mains and Ties Only)

f. Remaining outputs wired to terminal block.

16. Communication Capability:

a. One (1) Front EIA-232 Serial Port

b. One (1) Front USB Port

c. Two (2) Rear EIA-232 Serial Ports

d. Two (2) Rear 10/100 Base-T Ethernet Ports

e. One (1) Rear Fiber-Optic MM ST Serial Port

17. Time Synchronization Capability:

a. Accept demodulated IRIG-B via rear BNC input.

D. Bus Differential Relay

1. Preferred Brand Alternate: Manufacturer: SEL-587Z, Model Number:

0587Z0X625322XX.

2. LCD Display

3. Provide separate set of current transformers at each breaker for high impedance bus differential system.

4. Communication Capability:

a. One (1) Front EIA-232 Serial Port

b. One (1) Rear EIA-485 Port with C675 Pinout Module

5. Time Synchronization Capability:

a. Accept demodulated IRIG-B via pins of EIA-485 Port

2.9 AUXILIARY DEVICES

A. Current Transformers (CTs):

1. Furnish ring type current transformers as indicated on the drawings and as needed for an operational system per the design intent.

2. CTs shall be installed such that they can be removed from the front of the switchgear without exposure to power bussing or cable terminations.

3. CTs shall have secondary termination on a shorting terminal block.

4. CTs shall be fully rated for associated voltage class and suitable for connected burden.

5. Minimum rating factor of CT shall be 1.25 at 30 deg C ambient.

B. Voltage Transformers (PTs) and Control Power Transformers (CPTs):

1. Furnish voltage and control power transformers as indicated on the drawings and as needed for an operational system per the design intent.

2. PTs/CPTs shall be installed in drawout assembly easily disconnected from power bussing.

3. PTs shall have voltage rating comparable to metering equipment with appropriate burden equal to twice the initial load.

4. PTs shall have BIL to match the switchgear rating.

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5. PTs/CPTs shall have a lineside current limiting fuse. PTs shall have secondary fuse and CPTs shall have secondary circuit breaker.

a. Ampacity rating of overcurrent protective devices shall be determined by switchgear manufacturer.

6. Shutters shall isolate primary bus stabs when drawers are withdrawn.

C. Furnish test switch/block to facilitate testing of relay without interrupting service and for prohibiting trip out relay as indicated on drawings. Provide type per tag identified on drawings as follows with black cover and screw terminals:

1. Test Switch Designation TS1, as indicated on drawings:

a. Two (2) Potential and Eight (8) Current Switches.

b. Preferred Brand Alternate: ABB FT-1 10 POLE SWITCH MODEL # 849A513G01.

2. Test Switch Designation TS2, as indicated on drawings:

a. Ten (10) Potential Switches

b. Preferred Brand Alternate: ABB FT-1 10 POLE SWITCH MODEL # 9676A94G01.

3. Provide nameplate designated function of each switch position per test switch.

D. Provide Breaker Control Switch per breaker.

1. Device 01 (on drawings), manually operated, spring return to center device

2. Minimum one deck

3. Refer to drawings for additional internal wiring requirements.

E. Provide separate Lockout Relay located at face of switchgear as indicated on drawings.

1. Device 86 (on drawings), latching relay, manual reset.

2. Quantity of decks as required to meet drawing intent and provide minimum two

(2) spare NO and two (2) spare NC contacts.

3. Refer to drawings for additional internal wiring requirements.

F. Provide IRIG-B coaxial distribution and BNC T connectors to relays and meter as indicated on drawings. No more than ten (10) devices shall be arranged for connection to a single IRIG-B output.

1. IRIG-B output shall be from GPS clock provided by others.

G. Furnish one portable, floor-supported, roller-based, elevating carriage arranged for movement of circuit breakers in and out of compartments.

H. Furnish one DC power breaker test station.

I. Furnish one electric racking device. A portable, remote racking device to allow racking of a circuit breaker from distances of 10 to 20 feet.

J. Strip heaters with thermostatic controls for breaker, bus and cable compartments.

1. Power source for strip heaters shall be from AC Panel within Walk-In Equipment Enclosure.

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2.10 OWNERS METERS

A. Metering requirements – Refer to the drawings.

B. Basis of design devices listed below. Refer to Section 1.3.B.1.a for acceptable alternate manufacturers.

C. Meters shall be:

1. Preferred Brand Alternate: Manufacturer: SEL-735, Model Number:

0735LX20944EXXXXXX16201CX (735#0401).

2. Microprocessor based.

3. Digital readout

4. 3-phase for connection to 4-wire systems.

5. Meter shall display direct readout metered or calculated values of:

a. Volts (V)

b. Amps (A)

c. Apparent Power (VA)

d. Power Factor (PF)

e. Reactive Power (VAR)

f. Amps demand (Ad)

g. Real Power Demand (kWd)

h. Frequency (Hz)

i. Real Power Usage (kWHr)

6. PQM meters shall incorporate the following additional features:

a. Total Harmonic Distortion, Amps (THD)

b. Total Harmonic Distortion, Volts (THD)

c. Waveform Capture

d. Trending and forecasting

e. Alarm Summary

f. Voltage Flicker metering

g. Sag/swell metering

h. Provided with 10-pole test switch (nickel plated with cover), with 4 handles tied to voltage and 6 handles tied to current. Test switches shall comply with

ANSI C12.9.

i. Provide data outlet adjacent to the meter in switchgear for meter connection to the building network.

7. Input Contacts wired internally by Switchgear Manufacturer

a. 52A – Breaker Closed

b. 52B – Breaker Open

8. Communication Capability:

a. One (1) Front EIA-232 Serial Port

b. One (1) Front USB Port

c. One (1) Rear EIA-232 Serial Port

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d. One (1) Rear EIA-485 Serial Port

e. One (1) Rear 10/100 Base-T Ethernet Port

9. Time Synchronization Capability:

a. Accept demodulated IRIG-B via 2-pin Phoenix connector.

2.11 CONTROL/COMMUNICATION EQUIPMENT

A. Basis of design devices listed below. Refer to Section 1.3.B.1.a for acceptable alternate manufacturers.

B. Provide cubicle within switchgear for control/communication equipment. Provide internal wiring between equipment as indicated on drawings. Control/communication equipment shall be programmed by relay manufacturer, contracted separately by Owner.

1. Final model numbers shall be coordinated with relay manufacturer/Owner prior to approval of shop drawings.

2. Basis of design for each device listed below. Refer to section 1.3.B.1.a for list of acceptable alternate manufacturers.

C. Automation Controller

1. Preferred Brand Alternate: SEL-3350 (Final Model configuration by relay manufacturer).

2. Horizontal 3U Panel mount

3. Power supply compatible with 125VDC

4. RTAC Operating System

5. Minimum 64GB Industrial Grade SSD

6. Digital IO Expansion Board; 8 Outputs, 24 Inputs

a. Input Contacts wired internally by Equipment Enclosure Manufacturer

1) Enclosure Smoke Detector Alarm

2) Enclosure Temp Sensor, High Temp Alarm

3) Enclosure HVAC Unit #1 Alarm

4) Enclosure HVAC Unit #2 Alarm

5) Enclosure H2 Detector Alarm

D. Satellite-Synchronized Clock

1. Preferred Brand Alternate: SEL-2488 model # 24880PAX1181AX23X (2488#7X23)

2. Panel mount

3. Power supply compatible with 125VDC

4. Antenna and Complete Installation Kit, basis of design:

a. SEL-9524A GPS Antenna (installed by Equipment Enclosure Manufacturer)

b. Antenna Pipe-Mounting Kit (PN: 915900043) (installed by Equipment Enclosure Manufacturer)

c. 25 ft SEL-C961 LMR-400 Cable (installed by Equipment Enclosure Manufacturer)

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d. Gas Tube Coaxial Surge Protector and Mounting Kit (PN: 915900139)

e. SEL-C961 LMR-400 Cable

5. Provide IRIG-B distribution to devices internal to switchgear as indicated on drawings.

E. Managed 24-Port Ethernet Switch

1. Preferred Brand Alternate: SEL-2730M model # 2730M0APAX1111CCCCX0 (2730M#C449)

2. Quantity as indicated on drawings.

3. Four SFP Cages (Ports 1-4)

4. Four Copper 10/100/1000 Mbps (Ports 5-8)

5. Sixteen 10/100 Mbps (Ports 9-24)

6. Panel mount

7. Power supply compatible with 125VDC

8. Provide ethernet distribution to devices internal to switchgear as indicated on drawings.

2.12 NAMEPLATE

A. Nameplates

1. Engraved with 3/16” high black lettering on laminated plastic white background

2. Secured to switchgear enclosure with screws

B. Switchgear assembly:

1. Provide nameplate indicating:

a. Manufacturer's name and drawing number

1) Voltage ratings (kV nominal; kV maximum design; kV BIL)

2) Main bus continuous rating (A)

3) Short circuit ratings (amperes, rms symmetrical and MVA 3-phase symmetrical at rated nominal voltage)

4) Monetary and fault-closing ratings (amperes, rms asymmetrical)

b. Each bay shall bear nameplate indicating:

1) Ratings of interrupter switch (amperes continuous and interrupting)

2) Maximum rating of power fuse in amperes

3) Catalog number of fuse units or refill units

c. Mark control components for identification corresponding to designation on manufacturer’s drawings.

PART 3 - EXECUTION - BY EQUIPMENT MANUFACTURER

3.1 FIELD QUALITY CONTROL

A. Manufacturer’s Field Service

1. Engage a factory-authorized service representative to inspect and adjust field assembled components and equipment installation, including connections.

CHW Infrastructure Expansion – NCP 26 1319 - 18

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2. Provide startup services for switchgear to provide a fully operational system.

Startup services shall include but not be limited to:

a. Inspection and comprehensive check of all circuit breakers, fuses, protective relays, instrument transformers, metering, etc.

b. Verify functionality of internal and external control wiring associated with equipment.

3. Prior to energization, factory representative shall visually inspect switchgear installation to ensure that all switches, motor operators and breaker chargers are operable, all breaker compartments rack-in/out and bus connections are complete.

4. Switch operators shall be tested once after energization.

5. Measure primary and secondary voltages and make appropriate tap adjustments.

B. Provide copy of manufacturer's representative's certification

C. Inspect equipment for physical damage, proper alignment, connections, anchorage, seismic restraints and grounding.

3.2 SOFTWARE INSTALLATION

A. Switchgear Manufacturer shall upload program files for each protective relay and meter within the switchgear.

B. Upload or modification of each file in the field shall follow the following procedure:

1. Download the currently installed file and save a copy labeled with the name of the relay and a suffix indicating “AS FOUND ON” with date.

2. Upload the modified file in the field.

3. Download the modified file and save a copy labeled with the name of the relay and a suffix indicating “AS LEFT ON” with date.

4. Use software to perform a comparison of the “AS FOUND” and “AS LEFT” file.

5. Alert engineer/owner to any differences discovered from the comparison that are not known changes.

C. Upon acceptance of program file configuration and testing, program files shall be further augmented by relay manufacturer, contracted separately by Owner, to program relays for use in automation and integration into the campus SCADA.

3.3 TRAINING

A. Provide services of factory-trained representative to instruct Owner on maintenance and operation for two (2) sessions, with each session a period of 4 hours.

PART 4 - EXECUTION - BY INSTALLING CONTRACTOR

4.1 COORDINATION

A. Coordinate with miscellaneous trades for equipment foreign to the electrical installation to be outside of dedicated electrical space.

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B. Verify with manufacturer that “touch-up” paint kit is available for repainting.

4.2 EXAMINATION

A. Examine areas and surface to receive switchboards for compliance with requirements, installation tolerances, and other conditions affecting performance.

Proceed with installation only after unsatisfactory conditions have been corrected.

B. Verify that space indicated for switchgear mounting meets code-required working clearances.

C. Notify Designer of any discrepancies prior to submittal of product data and shop drawings.

4.3 INSTALLATION

A. Install equipment per manufacturer's recommendations and as indicated.

B. Install engraved plastic nameplates under provisions of Section 26 0553 – Electrical Systems Identification for each switchgear, every instrument, overcurrent protective device and disconnect device. Attach nameplate to exterior of each switchgear using small corrosion-resistant metal screws and rivets. Do not use contact adhesive.

C. Install switchgears in dedicated electrical space per NFPA 70, and as indicated on drawings.

D. Tighten electrical connectors and terminal according to equipment manufacturer’s published torque-tightening values. Where manufacturer’s torque values are not indicated, use those specified in UL 486A-486B.

E. Install control/communication wiring between Switchgear and SCADA racks.

4.4 CONNECTIONS

A. Ground switchgear according to Section 26 0526 – Grounding and Bonding for Electrical Systems.

B. Connect power and control wiring according to Section 26 0519 – Low-Voltage Electrical Power Conductors and Cables.

4.5 FIELD QUALITY CONTROL

A. Inspect switchgear for physical damage, proper alignment, connections, anchorage, seismic restraints and grounding.

B. Test continuity of each circuit.

C. Test switchgear per requirements in Sections 26 0812 – Power Distribution Acceptance Tests and 26 0813 – Power Distribution Acceptance Test Tables.

D. Interpret test results in writing and submit to Engineer.

E. Test switch operators once after energizing.

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4.6 REPAINTING

A. Remove paint splatters and other marks from surface of equipment.

B. Touch-up chips, scratches or marred finishes to match original finish, using manufacturer-supplied paint kit. Leave remaining paint with Owner.

4.7 SITE ACCEPTANCE TESTING

A. Provide assistance to test sequence of operations of automation system.

4.8 CLEANING

A. Clean switchgear during construction phase, prior to initial testing and energization of unit, and prior to final punch-list.

B. Cleaning procedures as follows:

1. Vacuum surfaces of enclosure and low voltage equipment.

2. Blow out components with dry compressed air.

3. Use small paintbrush to dust small, hard to reach crevices.

END OF SECTION

UNC – Chapel Hill DC Battery System CHW Infrastructure Expansion – NCP 26 1319.1 - 1

09/20/24

SECTION 26 1319.1

DC BATTERY SYSTEM

GENERAL

1.1 DESCRIPTION

A. Provide a complete DC Battery System, including battery rack, spill containment, battery chargers and fused disconnect.

B. DC Battery system shall be provided by the switchgear manufacturer. Refer to specification 26 1319 Medium-Voltage Vacuum Interrupter Switchgear.

1.2 SUBMITTALS

A. Submit all equipment procurement documents, including shop drawings and technical specifications, to the State Construction Office for review and approval, in addition to the engineer of record.

B. Compliance Package: Submit document package confirming specifications and design intent have been met. Note that the compliance package shall include information for the switchgear system as well as all components of the battery and controls system.

Compliance package shall include, but shall not be limited to, the following:

1. Cover letter with compliance table listing each specification section and indicating compliance “C”, deviation for alternate “D”, or exception with explanation “E”. Any deviation or exception shall be accompanied with detailed explanation of how design intent is being upheld.

2. Complete bill of materials

3. Engineering drawings for each component on the bill of materials. Drawings shall indicate physical dimensions of equipment.

4. Battery System sizing calculations to align with project specific switchgear components, relays, control equipment, etc. based on parameters defined in this specification and drawings.

5. Battery Charger sizing calculations to align with battery system sizing calculations based on parameters defined in this specification and drawings.

6. Single line diagram including actual configurations of components

7. Product catalog sheets or equipment brochures.

8. Product guide specifications.

C. Product Data: Submit product data showing all material proposed for the system.

Submit sufficient information to determine compliance with the Drawings and Specifications. Product data shall include, but shall not be limited to, the following:

1. As bid system bill of materials.

2. Product catalog sheets or equipment brochures.

D. Manufacturer's Installation Instructions:

1. Indicate application conditions and limitations of use stipulated by product testing agency. Include instructions for storage, handling, protection, examination, preparation, installation, and starting of product.

CHW Infrastructure Expansion – NCP 26 1319.1 - 2

E. Recommended spare parts lists.

1.3 QUALITY ASSURANCE

A. Regulatory Requirements:

1. Comply with NFPA 70 for components and installation.

2. Furnish products listed and classified by a third party agency amongst those acceptable to the NCBCC (North Carolina Building Code Council) to Label Electrical & Mechanical Equipment

1.4 DELIVERY, STORAGE, AND HANDLING

A. Store in clean, dry space. Maintain factory wrapping or provide additional canvas or plastic cover to protect units from dirt, fumes, water, corrosive substances, construction debris, and traffic.

B. Use factory-installed lifting provisions. Handle carefully to avoid damage to switchboard internal components, enclosure, and finish.

1.5 WARRANTY

A. Manufacturer shall provide standard two year warranty against defects in materials and workmanship for products specified in this Section. Warranty period shall begin on date of final acceptance.

PRODUCTS

2.1 125VDC BATTERY

A. Acceptable Manufacturers: C&D, East Penn, Enersys, Exide, approved equal by switchgear supplier

B. Battery shall be Valve Regulated Lead Acid type.

1. Battery system shall be sized based on the following criteria per the project specific vacuum breakers, relay, and auxiliary power requirements of each switchgear and associated control equipment.

a. Ambient Temperature = 77 deg F

b. End of Life Cell Voltage = 1.75V

c. Aging Compensation Factor = 1.25

d. Design Factor = 1.1

e. 20-year design life

f. Individual battery jar weight shall not exceed 225 lbs.

g. Battery shall be sized based on the following momentary loads, continuous loads and load profile. Note that the Electrical SCADA equipment are estimated. Final determination of the Electrical SCADA equipment shall be determined by SEL/Owner prior to approval of battery system shop drawings.

1). Note that total trip is based on the largest bus differential zone (most breakers tripping simultaneously).

CHW Infrastructure Expansion – NCP 26 1319.1 - 3

Momentary Loads Description QTY AMPS TOT Trip Coil 8 0.7 5.6

Close Coil 3 1.8 5.4

Charging Motor 1 15 15

Total Trip 5.6

Total Close 5.4

Total Charging 15

Total Continuous Load (Includes Future Loads) Description QTY AMPS TOT SWGR Relay & Meter Equipment Main Relay + Digital Inputs 2 0.21 0.4

Tie Relay + Digital Inputs 1 0.21 0.2

Feeder Relay + Digital Inputs 12 0.21 2.5

Bus Differential Relay + Digital Inputs 2 0.05 0.1

METER 2 0.12 0.2

LED Pilot Lights 45 0.01 0.5

Electrical SCADA Equipment - Estimated GPS Clock 1 0.75 0.8

Ethernet Switch 2 0.79 1.6

PLC 1 3.71 3.7

I/O Interface 1 0.42 0.4

Misc Buffer 1 1.00 1.0

Total Continuous 11.48

Sizing Parameters Step Description Step Duration AMPS Total Continuous 1 4 hr 11.48

Total Continuous + Total Trip 2 1 min 17.08

Total Continuous + Total Charge 3 1 min 26.48

2. Battery rack shall be arranged to not exceed 4’-0” L x 2’-0” D. Height shall be as necessary for quantity of jars:

a. Seismic Zone 2L rated

b. Provide front safety shield extending the full height of the battery rack.

3. Provide UL Listed spill containment with minimum 4” High Steel Barrier with liner and neutralization and absorption pillows listed and classified by a third party agency amongst those acceptable to the NCBCC (North Carolina Building Code Council to Label Electrical & Mechanical Equipment..

2.2 125VDC BATTERY CHARGER

A. Provide two (2) battery chargers arranged for parallel operation for redundancy.

B. Acceptable Manufacturers: SAFT, Hindle or Approved Equal by switchgear supplier.

CHW Infrastructure Expansion – NCP 26 1319.1 - 4

C. Input: 240, 1 phase AC Voltage

D. Output: 125V DC

E. Microprocessor controlled with SCR based rectification.

F. AC Input and DC Output Circuit Breakers

G. Size Battery Charger based on calculated amp-hours removed from battery system per the following:

1. Minimum Charger Size = (Amp-Hour Removed x Recharge Factor) / Recharge Time + Total Continuous Load

2. Recharge Factor = 1.1

3. Recharge Time = 8 Hours

H. Provide battery eliminator option.

I. Provide modbus communication card via ethernet for the following parameters at a minimum:

1. AC Input Failure

2. Summary Alarm

3. DC Output Voltage

4. DC Output Current

J. Nema 1 Enclosure

K. Maximum Dimensions: 1’-8” L x 1’-8” D

2.3 DC FUSED DISCONNECT

1. Acceptable Manufacturer: ABB/GE, Eaton, Square D

2. NEMA AB 1, UL 98.

3. 125VDC.

4. Ampere Rating: As Determined by Switchgear Manufacturer

5. Load interrupter enclosed knife switch, heavy-duty type

6. Non-fusible type as indicated.

7. Switch Interiors:

a. Switch blades that are visible in "OFF" position when switch door is open

b. Plated current carrying parts.

8. Switch Mechanism:

a. Quick-make, quick-break, with visible blades and externally operable handle

b. Lockable only in "OFF" position and accept three industrial type, heavy-duty padlocks

c. Dual cover interlock to prevent unauthorized opening of switch door when handle is in "ON" position, and to prevent closing of switch mechanism with door open.

d. Defeater mechanism to bypass interlock.

e. Operating handle integral part of enclosure

CHW Infrastructure Expansion – NCP 26 1319.1 - 5

f. Handle to physically indicate "ON" and "OFF" position.

EXECUTION – BY EQUIPMENT MANUFACTURER

3.1 MANUFACTURER’S FIELD SERVICE

A. Factory-authorized service representative shall inspect and adjust field assembled components and equipment installation, including connections, prior to energization.

B. Provide startup services to provide a fully operational system. Startup services shall include but not be limited to:

1. Verify all functional operations.

2. Verify communications with the SCADA.

C. Provide copy of manufacturer's representative's certification.

3.2 ADJUSTING

A. Set field-adjustable circuit breakers trip settings, to values indicated by Designer.

3.3 FIELD QUALITY CONTROL

A. Inspect equipment for physical damage, proper alignment, connections, anchorage and grounding.

3.4 ACCEPTANCE TESTING

A. Testing by Equipment Supplier. Equipment Supplier shall provide factory standard start-up/check out services.

EXECUTION - BY INSTALLING CONTRACTOR

4.1 EXAMINATION

A. Visually inspect to confirm that items and accessories are in accordance with specifications and drawings.

B. Verify field measurements are as shown on shop drawings.

C. Verify that required utilities are available, in proper location, and ready for use.

4.2 INSTALLATION

A. Install equipment per manufacturer's recommendations and as indicated.

B. Coordinate final locations of equipment with Owner and review final locations with Owner/Engineer prior to setting equipment.

C. Protect equipment during installation to prevent twisting or deformations, exposure to potentially damaging environments, and work of other trades. Maintain protection until completion of construction.

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