Section 1000_33 72 33 Power Control Enclosure_69CRC-S3768~1.pdf

Project No. 3636S Stage II Reliability Upgrades Commitment No. 011409.1 Power Substation Rev. 08/2023 (CMAR) 00 01 07-5 Professional Seals

Initials Design Professionals of Record Seal

KJL

Kenneth Long License No. 031249 Expiration December 31, 2025 Electrical Engineer

Stantec 601 SW Second Avenue Suite 1400 Portland, Oregon 97204-3128

Number Specification Title 26 05 19 Low-Voltage Electrical Power Conductors and Cables 26 05 23 Control-Voltage Electrical Power Cables 26 05 26 Grounding and Bonding 26 05 33.13 Conduit for Electrical Systems 26 05 33.23 Surface Raceways for Electrical Systems 26 05 43 Underground Ducts and Raceways for Electrical Systems 26 05 53 Electrical Identification 26 09 16 Electrical Controls and Relays 26 24 00 Panelboards and Switchboards 26 26 10 Conductors and Cables 26 26 20 Conduits, Cable Trays, Boxes, Manholes, and Pullboxes 26 28 16 Enclosed Switches and Circuit Breakers 26 33 13 Batteries 26 33 16 Battery Racks 26 33 19 Battery Units 26 33 43 Battery Chargers 26 33 46 Battery Monitoring 33 71 23 Insulators and Fittings 33 71 26.23/26 Combined Instrument Transformers 33 72 23.13 Bus Support Insulators 33 72 33 Power Control Enclosure 33 73 13.01 Liquid-Filled Main Power Transformers 33 75 19 Gas High-Voltage Circuit Breaker 33 75 30 69 kV Three-Pole Group-Operated Disconnect Switch 33 75 39 High-Voltage Surge Arresters 33 77 23 Vacuum Medium-Voltage Circuit Breaker si

02/26/2024

WBruninga Highlight 33 72 33 Power Control Enclosure

Rev. 08/2023 33 72 33-1 Power Control Enclosure

SECTION 33 72 33

POWER CONTROL ENCLOSURE

PART 1 - GENERAL

1.1 SUMMARY

A. Enclosure:

1. This document contains the specification for supply and delivery of pre-fabricated and assembled Power Control Enclosure (PCE) with integral Control and Relay Panels (CRP). Delivery includes the following essential equipment and features:

a. NEMA 3R structure with exterior walls and roof fabricated from interlocking panels to house and protect the internal equipment from the elements.

b. Structural grid base and floor system will be designed for applicable floor loading allowing the PCE to be lifted and transported with the interior equipment installed.

c. Mounting frame will maintain alignment of mounted components without depending on concrete foundation and lifting attachments.

2. The PCE shall be one of the following types of construction:

a. Sheet metal and plating over structural steel frame with insulated cavity and painted finish. The structural steel frame shall be erected using galvanized steel forms.

b. Self-framing, interlocking panel design using G90 galvanized metal.

c. Concrete around structural steel frame with glass fiber reinforced concrete panels. Concrete panels are to be attached to the structural steel frame using embedded bonding rods, providing free expansion and contraction. The floor and roof sections shall be welded to the completed wall sections.

3. The design and construction of the enclosure shall:

a. Be rodent-proof and completely weatherproof.

b. Meet applicable portions of the latest edition of the International

Building Code (IBC).

c. Avoid the use of gaskets preventing the entrance of moisture and dust into the enclosure. The use of gaskets shall be limited to doors, power, and control cable entrance cover plates, and between the base and walls.

4. The PCE base shall be constructed of structural members sized by design structural calculations and reinforced to meet or exceed specified static and dynamic loads. Structural members are to be located to coordinate with the enclosed equipment as necessary to provide proper support and allow maximum access to equipment floor openings for cable penetration where required. Such design calculations are the responsibility of the PCE Manufacturer/Supplier and shall be made available for review by the Engineer and Local Code Authorities.

B. Relay and Control:

1. The Supplier shall furnish and deliver the completed and fully integrated

PCE incorporating all Control and Relay Panels (CRP) as shown on the

Rev. 08/2023 33 72 33-2 Power Control Enclosure

Drawings. The CRP shall be final designed and fully assembled at the factory, tested, and delivered, fully integrated into the PCE.

2. Equipment, materials, and accessories shall be furnished, mounted, and connected as indicated on the Drawings. Equipment, materials, and accessories listed by type or catalog number shall be furnished as specified. Proposed exceptions, alterations, and substitutions require written approval by Owner before being purchased.

3. The included physical arrangement of the control and relay panels is for reference only. The specific details for construction, fabrication and assembly of the individual panels are responsibility of the Supplier of the

PCE.

4. Drawings providing sufficient detail for the construction, fabrication and assembly of the individual panels shall be submitted to the Engineer for review and approval prior to beginning fabrication of any panel.

C. Station Service:

1. Furnish all indoor and outdoor electrical distribution equipment necessary for the proper operation of enclosure services. Install equipment in accordance with applicable enclosure codes and NEC.

D. Inspections:

1. The Owner reserves the right to assign representative(s) to inspect and review the nearly completed PCE prior to the execution of the Factory Acceptance Test(s) (FAT). The purpose of this is to verify the quality and compliance with these specifications and the readiness of the PCE for executing the FAT in the most efficient manner possible.

E. Testing:

1. The Manufacturer/Supplier shall test all components, devices, circuits, and assemblies of the completed PCE and related CRP lineups prior to preparation for and shipment to the job site.

2. All testing shall be performed in accordance with applicable NETA-ATS guidelines. Testing shall be performed by NETA Level III certified personnel.

3. Perform production tests for enclosure in accordance with applicable industry standards. Test all wire, cable, equipment, and systems of the PCE when assembly is complete to assure proper installation, settings, connections, and functioning of the support services and equipment. Verify operation is in accordance with the Drawings, specifications, and/or components Supplier's recommendations.

4. Perform operational tests of the CRP panel lineups in accordance with applicable industry standards. Test all wire, signals, components, and circuits of the CRP lineups when assembly is complete to assure proper assembly, settings, connections, and functioning of the control circuitry in accordance with the Drawings, specifications, and the Supplier's recommendations.

5. The Supplier shall have in place a system for recording, correcting, and verifying resolution of discrepancies discovered during the inspection and testing processes.

Rev. 08/2023 33 72 33-3 Power Control Enclosure

F. Material Specification Compliance - No alternate quotation to, or deviation from, this material specification without prior written approval of the Owner will be permitted. Any such submission may void the equipment Supplier’s quotation.

G. Technical Application Questions - Technical questions regarding this material specification or notice of any other technical matters which arise during the proposal process or during equipment design, manufacture, or test, shall be directed to the Engineer.

1.2 RELATED SECTIONS:

A. Section 01 33 00 – Submittal Procedures.

B. Section 01 33 17 – Structural Design, Support, and Anchorage.

C. Section 05 50 00 - Metal Fabrications.

D. Section 05 52 10 - Aluminum Railings.

E. Section 08 11 00 - Metal Doors and Frames

F. Section 08 71 00 – Finish Hardware

G. Section 10 44 00 – Fire Protection Specialties

H. Section 22 05 29 - Hangers and Supports for Plumbing Piping and Equipment.

I. Section 23 05 00 - Common Works Results for HVAC

J. Section 23 31 00 - Ductwork

K. Section 26 05 19 - Low-Voltage Electrical Power Conductors and Cables.

L. Section 26 05 23 - Control-Voltage Electrical Power Cables.

M. Section 26 05 26 - Grounding and Bonding.

N. Section 26 05 53 - Electrical Identification.

O. Section 26 09 16 - Electrical Controls and Relays.

P. Section 26 24 00 - Panelboards and Switchboards.

Q. Section 26 26 10 - Conductors and Cables.

R. Section 26 26 20 - Conduits, Cable Trays, Boxes, Manholes, and Pullboxes.

S. Section 26 33 13 - Batteries - Standby DC Station Service.

T. Section 26 33 16 - Battery Racks - Standby DC Station Service.

U. Section 26 33 19 - Battery Units - Standby DC Station Service.

Rev. 08/2023 33 72 33-4 Power Control Enclosure

V. Section 26 33 43 - Battery Chargers - Standby DC Station Service.

W. Section 26 33 46 - Battery Monitoring - Standby DC Station Service.

1.3 REFERENCES

A. American Institute of Steel Construction

1. Steel Construction Manual

2. Basic Seismic Design Manual

B. American National Standards Institute Standards:

1. ANSI C12.1 - Code for Electricity Metering.

2. ANSI C39.1 - Requirements, Electrical Analog Indicating Instruments.

3. ANSI Z535.4 - Product Safety Signs and Labels.

C. American Society of Heating, Refrigerating and Air Conditioning Engineers:

1. ASHRAE/IES 90.1 - Energy Efficient Design of New Building.

D. American Society for Testing Materials:

1. ASTM A36/A26M-19 – Standard Specification for Carbon Structural Steel.

E. American Welding Society

1. AWS-D1.1/D1.1M-2020 - Structure Welding Code - Steel

F. International Building Code (IBC)

G. International Energy Conservation Code (IECC)

H. International Electrical Testing Association (NETA):

1. NETA ATS - Standard for Acceptance Testing Specifications for Electrical

Power Equipment & Systems.

I. National Electrical Manufacturers Association (NEMA)Standards:

1. NEMA 250 - Enclosures for Electrical Equipment (1,000 Volts Maximum).

2. NEMA FU-1 - Low-Voltage Cartridge Fuses.

3. NEMA ICS-1 - Industrial Control and Systems: General Requirements.

4. NEMA ICS-2 - Controllers, Contactors, and Overload Relays Rated 600

Volts.

5. NEMA WD-1 - General Color Requirements for Wiring Devices.

6. NEMA WD-6 - Wiring Devices Dimensions Specifications.

J. National Fire Protection Association:

1. NFPA 70 - National Electric Code (NEC)

2. NFPA 70E - Standard for Electrical Safety in the Workplace

K. Underwriters Laboratories, Inc. Standards:

1. UL 50A - Standard for Industrial Control Panels.

L. Design Drawing- Requirement Drawings:

1. Volume II Contract Drawings

Rev. 08/2023 33 72 33-5 Power Control Enclosure

1.4 SUBMITTALS

A. In accordance with Section 01 33 00.

B. Furnish drawings and other information to Engineer for review and approval and other uses. Documents shall include the following as a minimum:

1. Shop drawings as described below:

a. Prior to beginning fabrication, the PCE Supplier shall submit to the Engineer for review and approval, documents and shop drawings detailing the design, construction, layout, and equipment to be provided as part of the PCE.

b. The shop drawings will include detailed equipment assemblies that indicate dimensions, weights, loads, required clearances, method of field assembly or installation, integrated components, and location and details of the SS. Shipping drawings shall also be provided.

c. Shop drawings shall detail the arrangement and layout of the control and relay panels including the specific description of the devices in each lineup.

d. Three (3) sets of the final documents shall be provided as follows:

1) One (1) set shall be attached and shipped with the equipment in a weatherproof envelope or in the control compartment.

2) Two (2) sets shall be forwarded for the Contractor.

3) Other copies in other formats shall be furnished as outlined within this specification.

e. Specific materials identified on bill(s) of materials for installation in

CRPs shall be reviewed and approved by the Engineer prior to purchase.

f. As a minimum, the following drawings shall be created and provided as prescribed herein:

1) PCE physical arrangement, layout and details including front and side elevation views.

2) PCE base plan including mounting details, cable entry area, and door swing requirements.

3) PCE shipping drawings showing lifting and shipping splits.

4) PCE bill of material indicating quantity, description, and part number.

5) PCE interior SS distribution one-line diagram.

6) PCE internal equipment layout diagram.

7) PCE services electrical diagram.

8) Detailed electrical interconnection diagram for equipment installed as part of the basic PCE.

9) Applicable three-line diagrams.

10) CRP panel assembly details.

11) CRP equipment physical arrangement, layout, and details.

12) CRP component bill of material indicating quantity, description, and part number.

13) CRP schematic diagrams for the control elements included in the lineup.

14) CRP wiring diagrams for each individual panel.

15) AC and DC panel schedules.

Rev. 08/2023 33 72 33-6 Power Control Enclosure

16) Control diagrams for systems, assemblies, or other items provided by a third party.

C. Operation and Maintenance Manuals: Supplier shall provide consolidated Operation and Maintenance (O&M) manual for the completed, assembled, and installed PCE. Information shall include instructions for operating and maintaining all systems, components, devices, and assemblies.

D. Equipment and material lists, prior to ordering of materials.

E. Structural calculations and structural drawings stamped by the appropriate state registered engineer.

F. Seismic certification – The Supplier shall submit certification that the PCE, the CRP, and all supplied, mounted, and/or installed, accessories, assemblies and components will withstand seismic forces identified for the site including the following:

1. Basis of Certification: Indicate whether certification is based on actual test of assembled components or on calculation. The term “withstand” means the unit will remain in place without separation of any parts from the device when subjected to the seismic forces specified and the unit will be fully operational after the seismic event.

2. Dimensioned Outline Drawings of Equipment Unit: Identify center of gravity and locate and describe mounting and anchorage provisions.

3. Detailed description of equipment anchorage devices on which the certification is based and their installation requirements.

4. The completed wind and seismic calculations and/or evaluations shall be stamped by a Structural Engineer licensed in the State in which the PCE will be installed.

G. Test reports and results of other testing.

H. HVAC calculations and design SEER rating stamped by the appropriate state registered engineer.

I. Enclosure HVAC unit selected, insulation, and selected material.

1.5 DEFINITIONS

A. AC: Alternating current.

B. CRP: Control and relay panel.

C. DC: Direct current.

D. FTC: Field termination cabinet.

E. GFCI: Ground-Fault Circuit Interrupter

F. I/O: Input/Output.

G. LED: Light emitting diode.

Rev. 08/2023 33 72 33-7 Power Control Enclosure

H. PCE: Power control enclosure.

I. SS: Station service.

PART 2 - PRODUCTS

2.1 DELIVERABLES

This document contains the specification for supply and delivery of pre-fabricated and assembled Power Control Enclosure (PCE) with integral Control and Relay Panels (CRP).

Delivery includes the following essential equipment and features:

1. Provision for connection to offsite SS power.

2. Provision for connection to onsite station power service source(s). Note:

This may include SS power source transformers when included or shown on Drawings or documents.

3. Internal SS distribution.

4. AC transfer switches.

5. AC load centers.

6. DC Power center including battery(ies) and charger(s).

7. Provide an eyewash station to be located near the battery installation.

8. DC load centers.

9. Fused or unfused disconnect switches.

10. Freestanding relay panel lineups.

11. Integrated CRP and related components, equipment devices, and wiring.

12. FTC for interface of interior equipment with field cables.

13. Interior cable connections between the FTC and each CRP and SS.

14. Overhead cable tray system and wireways to facilitate routing of interior cabling.

15. Equipment bonding and grounding.

16. Heating ventilation and air conditioning (HVAC) unit(s).

17. Complete enclosure, fabricated, wired, tested, and delivered, ready for site integration, suitable for outdoor installation.

18. Fire suppression equipment (fire extinguisher).

19. Access doors and exterior stairs, platform (stoop), and railing.

2.2 INSTALLATION DESIGN

A. The PCE shall be designed for installation directly on a slab foundation as identified in the accompanying Drawings and design documents.

2.3 WARRANTY

A. Special Warranty: Manufacturer's/Supplier's standard form in which Manufacturer/Supplier agrees to repair or replace components of the PCE, including control and relay panels and auxiliary components that fail in materials or workmanship within a five (5) year warranty period beginning on the date the substantially complete PCE is received at the job site.

Rev. 08/2023 33 72 33-8 Power Control Enclosure

PART 3 - EXECUTION

3.1 STRUCTURAL CRITERIA

A. General:

1. All welding shall be performed by AWS qualified personnel.

2. Area Classification – General Purpose / Non-hazardous.

3. Each shipping piece shall be designed for lifting by lugs located along the base perimeter members at approximate intervals of 15-feet. All lifting lugs shall be removable.

B. Loading - Components shall be designed to withstand external loading as prescribed by the applicable codes above (as a minimum), with consideration for the Project Specific Information section requirements, and co-lateral considerations as follows:

1. Base and floor system shall be designed to withstand all dead and live loads as applicable, or a minimum of 250-lbs. per square feet over the entire floor area, while supported at lift points only.

2. Maximum deflection of all base members shall not exceed L/240 at time of lift, and following final installation, with all applicable dead and live loads applied, or a minimum of 250-lbs. per square feet over the entire floor area.

3. Shipping splits and other penetrations shall have adequate structural reinforcement via rigid frames or other means to minimize distortion during handling and transportation.

4. Floor and Ceiling Loads:

a. Roof loading – Per Current State Building Code (20-lbs. per square feet minimum).

b. Wind loading – Per Current State Building Code – Exposure C minimum.

c. PCE shall be designed for seismic installation identified elsewhere in this specification.

d. The ceiling shall be capable of withstanding a continuous load of

100-lbs. per linear foot.

e. Designed to withstand forces and loads incurred during loading, unloading, and shipping.

3.2 CONSTRUCTION REQUIREMENTS

A. Construction:

1. Welded frame construction shall use 4-inch G90 galvanized steel forms welded together as a frame. Exterior to be 18-gauge overlapped ribbed steel paneling. Interior to be 22-gauge rolled liner with overlapped seams.

2. Self-framing interlocking panels shall be fabricated with 18-gauge (minimum) G90 galvanized sheet steel for interior and exterior walls. All seams shall be caulked using a high modulus silicone-based product.

Gasketed seams are unacceptable.

3. Concrete with glass fiber concrete panels shall utilize a two-step keyway joint to prevent moisture intrusion.

4. Interior wall sheathing to be a composite paneling with white laminate.

Rev. 08/2023 33 72 33-9 Power Control Enclosure

B. Floor:

1. Base members shall be ASTM A36 wide flange, channel, angle, and tube shapes forming a self-supporting grid. All members shall be continuously welded to adjoining members.

2. Floor shall be ¼-inch (minimum) thickness flat steel plate, welded to all longitudinal and transverse base members. Alternate methods shall be submitted for review and approval by the Engineer prior to beginning fabrication.

3. Floor plate seams shall be continuously welded at all joints, and ground smooth to minimize visibility of seams. Welding of floor plate shall be staged to produce a flat and ripple free surface.

4. Paint the topside of the floor plates with a skid resistant paint prior to wall and equipment placement. The exposed floor shall be refinished just prior to shipment.

C. Insulation:

1. Wall insulation shall be secured to exterior wall panels by glue pins, straps, or other means prior to assembly of interior wall liner panels. Ceiling insulation shall be laid between interlocking ceiling panels.

2. Insulation shall be designed in accordance with the provisions of the 2021 International Energy Conservation Code (IECC) and applicable codes adopted by Clark County, Nevada.

3. Insulation Levels (Minimum):

a. Walls – R-19

b. Ceiling – R-19

c. Floor – R-20

D. Entrances

1. Personnel and Equipment Doors:

a. Personnel and equipment doors shall be supplied in accordance with the Drawings as identified herein. Doors shall be clearly marked with a lighted exit sign. Unless indicated otherwise, each door shall be single leaf, double wall, honeycomb reinforced, pre-galvanized, 20-gauge, 1.75-inch thick or approved equivalent and equipped as follows:

1) Panic hardware-thumb latch with keyed cylinder lock.

2) Closer with stop arm (Yale Series #50), or approved equivalent.

3) Factory frame.

4) Caps in top.

5) Weather stripping – black rubber.

6) Stainless steel hinges.

7) Fire resistant insulation (1.5-hour minimum rating).

8) Each door shall have a 12-inch by 12-inch safety glass window.

9) Minimum door width shall be sufficient to easily move the enclosure equipment in and out. Under no circumstance shall any single door be less than 42-inches wide.

2. Access stairs, platform, railings, and awnings at each entrance to the PCE.

a. Stair design to be coordinated with PCE base design and station foundation design.

Rev. 08/2023 33 72 33-10 Power Control Enclosure

b. Awning - Aluminum flat panel with drip shield, sufficient to cover platform (stoop).

c. Threshold – Aluminum.

E. Trim and Finish:

1. Coating system details shall be submitted to the Engineer for approval with the proposal.

2. The exterior color shall be light gray, and the interior shall be white.

3. The entire roof perimeter shall be trimmed with a fascia that aesthetically hides the standing rib roof edges, prevents high velocity rainwater run-off, and prevents built-up ice from sliding off the roof in large sheets

F. Grounding – Provide for grounding of the PCE as follows:

1. Bond two (2) external ground pads located at opposite corners, to the structural base to serve as an equipment ground connection point to the station grounding grid. Design ground pads to accept standard NEMA 2-hole lugs.

2. A 4/0 AWG bare copper conductor shall be installed in the cable tray system. This ground conductor shall be permanently bonded to the external grounding pads.

3. The ground bus from each piece of installed equipment shall be connected to the grounding conductor in the tray system to provide a continuous ground path

G. Climate Control:

1. Provide full capacity, split-type, direct expansion (DX) HVAC system for climate control of the PCE, with redundant units (backup). The cooling units shall be sized to maintain interior design temperatures as follows:

a. Normal Summer – 78°F Maximum

b. Normal Winter – 63°F Minimum

c. Limited Summer – 85°F Maximum

d. Limited Winter – 50°F Minimum

2. The HVAC system shall maintain the maximum/minimum interior temperatures above with consideration to ambient conditions (as shown on the HVAC drawings) and the specified internal equipment total heat loss calculated at 100-percent of the full load rating of each piece of electrical equipment installed in the PCE. The HVAC sizing shall be in accordance with all local codes and shall include all required ventilation. Submit HVAC sizing calculations for Engineer review.

3. Climate Control shall be provided in accordance with the provisions of the 2021 International Energy Conservation Code (IECC) and applicable codes adopted by Clark County, Nevada.

4. Refer to Specification Section 23 05 00 – Common Works Results for HVAC, for the technical requirements associated with climate control.

H. HVAC Units – Variable refrigerant volume/flow (VRV/VRF) air conditioning – heat pump:

1. Acceptable Manufacturers:

a. Daikin VRV Technology.

b. Mitsubishi VRF Technology.

c. LG VRF.

d. An approved equivalent HVAC manufacturer.

Rev. 08/2023 33 72 33-11 Power Control Enclosure

2. System Description:

a. The Heat Pump Air Conditioning system shall be a Variable

Refrigerant Volume or Variable Refrigerant Flow Series (heat or cool model) split system as specified. The system shall consist of multiple evaporators, REFNET™ joints and headers, a two-pipe refrigeration distribution system using PID control and VRV or VRF condensing unit. The condensing unit shall be a direct expansion (DX), air-cooled heat pump, single-zone air-conditioning system with variable speed inverter driven compressors using R-410A refrigerant. The condensing unit may connect an indoor evaporator capacity up to 200 percent of the condensing unit capacity.

b. The condensing unit shall be interconnected to indoor unit models and shall range in capacity from 7,500 Btu/hr to 96,000 Btu/hr in accordance with manufacturers engineering data book detailing each available indoor unit. The indoor units shall be connected to the condensing unit utilizing REFNET™ specified piping joints and headers to ensure correct refrigerant flow and balancing. T style joints are not acceptable.

c. Painted to match exterior color.

3. Controls:

a. The system shall operate in a lead-Lag configuration based on runtime.

b. The control system shall consist of a low voltage communication network of unitary built-in controllers with on-board communications and a web-based operator interface. A web controller with a network interface card shall gather data from this system and generate web pages accessible through a conventional web browser on each PC connected to the network. Operators shall be able to perform all normal operator functions through the web browser interface.

c. Interlocked with smoke and fire detection equipment to shut down the HVAC system in the event of emergency.

d. System controls and control components shall be installed in accordance with the manufacturer’s written installation instructions.

e. System shall provide direct and reverse-acting on, and off algorithms based on an input condition or group conditions to cycle a binary output or multiple binary outputs.

f. System shall be capable of email generation for remote alarm annunciation.

g. Control system start-up shall be a required service to be completed by the manufacturer or a duly authorized, competent representative that has been factory trained in controls system configuration and operation. The representative shall provide proof of certification for CMCN Essentials Training and/or CMCN Hands-On Training indicating successful completion of no more than 2 years prior to system installation. This certification shall be included as part of the equipment and/or controls submittals. This service shall be equipment and system count dependent and shall be a minimum of one 8 hour period to be completed during normal working hours.

4. When multiple HVAC units are required to meet the normal conditions, each unit shall be sized to maintain limited conditions as a standalone unit.

Multiple units will be controlled by a common lead-lag control.

Rev. 08/2023 33 72 33-12 Power Control Enclosure

5. The HVAC control system shall include provision for an Owner emergency shutdown relay.

3.3 PCE SERVICES

A. Station Service Power:

1. Unless shown or specified elsewhere, station service (SS) power is provided on the site by others. It will be supplied by multiple 240/120VAC single-phase 3-wire station services sources. The PCE system will include automatic transfer switches as shown on the Drawings.

2. Supplier shall provide separate interface terminals for each AC and DC power source to be connected to the PCE from external sources. Each set of terminals, as a minimum, shall be rated for the voltage and continuous current and be able to terminate oversized conductors (up to 250 kcmil) for the circuit to which it will connect. Enclosures for SS interface terminals shall be weather tight. AC terminals and DC terminals shall not be in the same terminal box unless otherwise shown.

B. AC Power:

1. Provide (minimum) two (2) 240V/120VAC, 3-wire, with ground, load centers with a minimum 225A bus, main breaker as shown on the Drawings each with a minimum of 42-branch circuits unless shown otherwise. Provide cable connection between the automatic transfer switch(es) and the AC load center(s). Refer to the basic design drawings as identified in the References Section, Design Drawing and Requirement Drawings, for individual load center configuration.

2. Supply PCE lighting, convenience outlet, and the other necessary PCE auxiliary loads and circuits as shown on the panel circuit drawings.

3. Supply other station auxiliary AC loads from the AC distribution panelboard.

4. Lighting and convenience outlets shall be served from separate circuits.

5. A minimum of two (2) separate circuits shall be provided for convenience outlets.

6. Adjacent convenience outlet shall be on separate circuits.

7. Do not deviate from the panel schedule shown on the Drawings without written approval prior to beginning fabrication.

C. Lighting and Illumination:

1. Interior overhead lighting and exterior lighting shall be light emitting diode

(LED).

2. Interior overhead lighting, lighting controls, and exterior lighting shall meet current energy code requirements for the location the PCE is to be installed.

3. Provide multi-way control of overhead lighting at each point of man-entry/exit.

4. Provide fixtures with impact protective shields and interference suppression. The minimum illumination level is 40-foot candles at floor level.

5. A minimum of two (2) separate circuits shall be provided for interior lighting.

6. Adjacent lighting fixtures shall be on separate circuits.

7. Provide an external light fixture at each personnel door.

a. Locate the light on the side of the door opposite the hinge.

Rev. 08/2023 33 72 33-13 Power Control Enclosure

b. The height of the exterior light shall be no less than 7-feet above the PCE "floor".

c. Exterior fixtures shall be weatherproof.

d. Fixtures shall have photo eye and motion sensor for master control.

In addition, provide an override switch located inside the entrance that it is associated with exterior light circuit.

e. The fixtures shall be shielded or downcast with raptor friendly color spectrum.

8. Provide and install self-contained, battery power, illuminated exit signs above each personnel door. Normal power shall be from the lighting circuit nearest the exit.

3.4 DC POWER AND BATTERY SYSTEM

A. A 48 Volts DC battery system with chargers shall be supplied and installed as shown on the Drawings.

B. Refer to Specification Sections listed below for the technical parameters associated with the DC Power and Battery System:

1. Section 26 33 13 - Batteries - Standby DC Station Service.

2. Section 26 33 16 - Battery Racks - Standby DC Station Service.

3. Section 26 33 19 - Battery Units - Standby DC Station Service.

4. Section 26 33 43 - Battery Chargers - Standby DC Station Service.

5. Section 26 33 46 - Battery Monitoring - Standby DC Station Service.

C. Provide one wall mounted, weatherproof, exhaust fan above the battery. The fan shall be capable of at least one complete air volume exchange in 4-hours. Install an exterior hood and air filter for the exhaust fan to mitigate blowing dust access to the enclosure. Exhaust fan shall be controlled by a hydrogen gas detection device.

D. Provide 48 Volts DC Load Centers with a minimum 200A main bus, and a minimum of 20 branch circuits. All DC breakers shall be 2-pole, and rated 250 Volts DC, 10 kAIC minimum. Refer to the basic design drawings as identified in the References Section, Design Drawing and Requirement Drawings, for individual load center configuration. Do not deviate from panel schedule without written approval prior to beginning fabrication.

3.5 PCE AUXILIARY PROVISIONS

A. Cable Entrance:

1. Provide continuous overhead cable tray system for interface of interior cables to FTC and between internal equipment, as follows:

a. Aluminum ladder type, 3-inches deep by 12-, 18- or 24-inches wide, suitable for NEMA VE-1 loading.

b. Supported by ceiling mounted hanger system. Provide (minimum)

6-inches (152mm) clearance between top of tray rail and lowest clearance point on the ceiling.

c. Connections between the cable tray and the freestanding relay equipment shall be made with Type 12 wireway nipples.

Rev. 08/2023 33 72 33-14 Power Control Enclosure

B. Wireways:

1. Access between the tray system and freestanding, wall mounted, or other equipment shall be via wireways. Unprotected or continuously supported cable or wiring connections are not acceptable.

a. Wireways shall be UL 870 listed, Type 12, lay-in or feed-through.

b. Provide screw covers where necessary.

c. Access between the tray system and horizontal or vertical wireway serving equipment that is remote from the tray shall be via rigid steel conduit or Type 12 wireway.

d. Provide two (2) wireway connections to each relay or control panel from the tray system.

C. Fiber Optic Cables:

1. Fiber optic cables including jumpers, patch cord or pigtails, shall not be routed in raceway containing other power or instrument cables.

a. Provide a means of physical separation such as innerduct or a full height barrier inside wireways or trays.

b. Raceways associated with fiber optic cable shall be designed to accommodate maximum at rest bending radius of cables being installed.

D. Field Termination Cabinet:

1. The PCE shall be supplied with a single FTC for interfacing field wiring to the interior of the PCE.

2. Size, quantity, location, and minimum fabrication requirements for the FTC is to be as shown on the Requirement Drawings.

3. As a minimum, the design of the FTC shall incorporate the following features:

a. Removeable doors with fixed stops and 3-point lockable latch.

b. Individual full size terminal boards: 12-point for control and signal connections, 4-point shorting style for currents. Note: Use of high capacity terminals is not acceptable unless identified and agreed upon in writing prior to release of PCE contract for fabrication.

Provide minimum, 10% spare terminals regardless of quantity shown on Drawings.

c. Removeable floor pan(s) for terminating of field cables, conduits, and vertical cable tray.

d. NEMA 3R construction minimum.

e. Weathertight entrance for routing of interior cables to FTC terminations.

f. Separate wireways with covers for routing of interior bound cables and field bound cables and conductors within the FTC.

g. Hardware for securing entering/exiting wiring within the FTC.

h. Label for all contained equipment devices and terminal blocks.

i. Yard lighting control contactor.

j. All wiring inside the FTC shall be terminated and labeled with its destination inside the PCE identified.

E. Station Service Terminal Boxes:

1. The PCE shall be supplied with two (2) exterior terminal boxes for interfacing the large current carrying capacity (AC or DC) station service conductors (up to 250 kcmil) to the SS equipment in the PCE. The terminal

Rev. 08/2023 33 72 33-15 Power Control Enclosure boxes shall include power terminals sized and rated for the SS as shown on the Drawings.

F. Yard Lighting:

1. Provide control circuitry and power wiring for lighting in the yard that is not attached directly to the PCE as described elsewhere in this specification.

2. Yard lighting controls and hardware shall be as shown on the Drawings.

Locate the controls inside the FTC unless shown otherwise.

3. Install and terminate the circuits for yard lighting as shown on the Drawings.

G. AC Power Wiring:

1. All AC power related cables and conductors routed inside the PCE to FTC, or terminal box destinations, shall be routed in such a manner as to minimize interference with control wiring.

2. Small gauge conductors serving loads inside of the PCE shall be kept separated and isolated from DC controls, AC signal conductors, and communication cables to as great a degree as possible.

3. Small gauge conductors serving loads outside the PCE and routed to the FTC shall be kept separated and isolated from DC controls, AC signal conductors, and communication cables to as great a degree as possible

4. Large gauge conductors routed between the SST or DCTB and the SS equipment located inside the PCE shall not be routed in cable trays containing DC controls, AC signal conductors, and communication cables unless physically separated and isolated by metallic barriers.

H. Fire Detection:

1. PCE supplier shall provide a fire detection system including smoke and heat detectors with the shipped PCE.

2. Detector outputs are to be interlocked with the HVAC system as described in Specification Section 23 05 00 – Common Works Results for HVAC.

3. Provide detector output alarms to interface with the Owner's SCADA system. Provide two additional contacts (three total to report output signal).

I. Room Accessories:

1. PCE supplier shall provide the following accessories with the shipped PCE:

a. One (1) 4-foot square wall board for station one-line diagram and communication interface Drawings.

b. One (1) 2-foot by 3-foot white board.

c. One (1) self-contained, standalone eyewash station located near the battery system.

3.6 CONTROL AND RELAY PANELS

A. The Supplier shall furnish and deliver the completed and fully integrated PCE incorporating all Control and Relay Panels as shown on the Drawings. The CRP shall be final designed and fully assembled at the factory, tested, and delivered, fully integrated into the PCE.

B. Equipment, materials, and accessories shall be furnished, mounted, and connected as indicated on the Drawings. Equipment, materials, and accessories listed by type or catalog number shall be furnished as specified. Proposed

Rev. 08/2023 33 72 33-16 Power Control Enclosure exceptions, alterations, and substitutions require written approval by Engineer before being purchased.

C. The included physical arrangement of the control and relay panels is for reference only. The specific details for construction, fabrication and assembly of the individual panels are responsibility of the Supplier of the PCE.

D. Drawings providing sufficient detail for the construction, fabrication and assembly of the individual panels shall be submitted to the Engineer for review and approval prior to beginning fabrication of any panel.

E. Control and Relay Panel Requirements:

1. The relay racks shall be freestanding and rack type UL508 is listed. Relays and control devices shall be semi-flush mounted on the front.

2. Each individual CRP structure shall be an assembly of standard fixed frame with individual vertical panels, each approximately 30-inches wide, fabricated from not less than 11 USS gage leveled steel sheets and formed steel members reinforced as required to form a rigid free-standing structure.

3. Each panel shall be formed with edges bent back and shall be designed to be readily removable from the structure without disturbing the remaining lineup or control or cross panel wiring. All joints shall be welded and ground smooth.

4. Mounting brackets or side panels at a minimum 60-inch high shall be provided on each side of each CRP for mounting and wiring auxiliary devices and terminal blocks.

5. Auxiliary equipment may be mounted on interior panels hinged and located to allow access to the back of equipment mounted on front panels only when approved by the Engineer. Intermediate barriers between adjacent panels shall be provided.

6. The distance between the fronts of back to back panels structures shall be as shown on the Drawings. The height to top of the panel structure, above the floor or base surface, shall be 90-inches plus 2-inch allowance for base channel.

7. Panel structures arranged back to back shall have an open aisle, a minimum of 30-inches wide, without permanent braces and for top entry of wiring without removal of permanent braces. Equipment and devices mounted in the rear of the panels shall not impinge on the aisle way.

8. Each panel structure shall be equipped with lifting eyes.

9. Each panel lineup shall be provided with removable end closures designed to permit future extension from either or both ends.

10. As a minimum, two (2) separate 20A, 120VAC, single phase utility power receptacle circuits from AC panels, shall be furnished. Receptacles shall be mounted and wired in a convenient location at the end and approximate midpoint of the lineup.

11. Provide continuous ground bar, 1/4-inch thick by 1-inch wide, in the rear of each panel lineup. Drill and tap for #10 NF screws along the length, with provision for NEMA 2-hole pad at each end.

F. Individual Panel Configuration:

1. The Supplier shall prepare a drawing depicting the proposed front panel device arrangement for each panel. Submit proposed bill of material, Rev. 08/2023 33 72 33-17 Power Control Enclosure nameplate schedule, and arrangement to the Engineer for review and approval prior to beginning fabrication.

2. Hinged panel construction shall not be used except with prior Engineer approval. When used, no equipment may be mounted on the hinged panel unless approved.

3. Instruments, meters, control switches, and protective relays shall be mounted on the fixed panels. Panel cutouts, mounting studs, and support brackets shall be accurately located.

4. Unused panel space shall be filled with blank plates. Multiple blank plates each no larger than eight (8) rack units high shall be used to fill the space.

Blank space shall remain clear of any equipment mounting for addition of future equipment.

5. Relay and control devices shall be semi-flush panel mounted on the front panel.

6. The bottom edge of panel mounted devices, particularly those requiring frequent and/or direct Operator interface, shall be no higher than 74-inches and no lower than 6-inches above the floor unless approved prior to beginning fabrication.

7. Terminal blocks shall be mounted on vertical rails, located near the rear of each of the side panels. These terminal blocks are intended for control, status, alarm, and low voltage power functions.

8. Provide a wire duct adjacent to the terminal blocks for wire management.

Wire duct shall be PVC, wide finger slotted, with cover, Panduit Type G (light gray), or equivalent.

G. Marking and Labeling - All devices, terminal blocks and conductor terminations shall be labeled, including fiber optic jumpers and communication cable terminations.

1. Plainly and permanently identify control and other devices using the same identification as shown on the schematic diagrams and as identified herein.

Place identification for devices inside the enclosure, adjacent to, but not on the device.

a. Exception No. 1: Where the size or location of the devices makes individual identification impractical, such as on electronic assemblies, use group identification.

b. Exception No. 2: Where panel layouts do not permit mounting identification plates adjacent to components, such as relays, place the permanent relay identification on the relay where it is plainly visible, and provide a second identification on the top of the panel wireway cover directly below the relay. Identify the wireway covers to show their proper location.

2. Identification plates for devices visible in the rear of control and relay panels shall be labeled as follows:

a. Laminated phenolic for engraving stock; a minimum of 0.062-inch thick. Use adhesive backed plates. Nameplates to be white with black lettering.

b. Information provided shall include both the panel location identifier (as described below) and the device name as shown on the schematic diagram.

3. Control and relay panels and mounted devices visible from both the front and rear of the panels shall have duplicate labels prepared and located as shown on the Drawings.

Rev. 08/2023 33 72 33-18 Power Control Enclosure

4. Each Test Switch (TS) shall be titled and labeled as shown on the Drawings. Each individual TS pole shall identify the specific circuit or function affected. Only the title of the TS is necessary for rear panel identification.

5. Rear panel device labels including location identifiers (when used) may be machine printed adhesive backed labels when approved in writing by the Engineer prior to fabrication. Provide brand and style of label making device and type of material to be used with submittal information when proposing machine printed adhesive labels.

6. Device identifiers as described below shall not include the letters "I" or "O".

H. Device Labels - Devices mounted and/or connected in the rear of the panel will be identified in the panel rear, using a 2-letter grid style designation. The two letters shall not be the same. Devices mounted through or mounted on the rear of the front panel will begin with A, B, C, etc. Example: AB, AC, AD, BA, BC, BD, CA, CB, CD, etc.

I. Terminal Blocks - Terminal boards mounted in a panel will be identified with a single or a 2-letter designation. For 2-letter designations the letters will be the same. Example: A, B, C, AA, BB, CC.

J. Conductor Terminations:

1. Identification tags shall be preprinted white heat shrinkable tubing, Raychem Shrinkmark system or equivalent.

a. Provide white marking sleeves with black lettering.

b. Lettering shall be marked onto marking sleeves with a machine designed for such use. Hand lettering is not acceptable. Lettering height shall be as large as possible (1/8-inch high minimum) and shall be clearly legible after shrinkage of sleeves.

c. Identify wire termination with an identifier corresponding to the destination as identified above.

2. Wiring between destinations (e.g., terminal boards and/or field devices) shall have permanent wire markers on both ends of all wires, digital, analog signal cables, and RTD cables. Label shall identify the beginning source (run from) and end destination (run to). Each tag name shall be unique.

The tag name closest to the termination point will identify the RUN FROM termination and the tag name toward the end destination (away from the termination point) will identify the RUN TO termination. Example:

Originating terminal- 1BC3C/2DT2; End destination- 2DT2/1BC3C.

K. Panel Wiring - All devices shall be completely wired, tested and ready for use, however, the final setting and programming and set-up of all relays will be by others.

1. Terminal Blocks:

a. For all panel and cabinet devices, including instrument transformers, provide terminal blocks for interfacing between wiring originating external to the relay panel devices and going to or coming from other wiring sources in the PCE.

b. Terminal blocks, fuse blocks, CT shorting blocks and other control devices are to be mounted inside the panel.

1) Terminal blocks shall be rated 25A, 600V with barriers between terminals. Equip terminal blocks with #10-32

Rev. 08/2023 33 72 33-19 Power Control Enclosure washer-head binding screws and white fiber marking strip.

Use General Electric Type EB terminal blocks or approved equivalent.

2) Not more than 2-wires connected under one (1) screw will be allowed for any terminal board or device.

3) Compression type connections on devices will have single wire connections.

4) Devices requiring multiple connections will be done at a terminal board.

5) Spare or unused contacts of all devices are to be connected to suitable terminal blocks for future use, as shown on the schematics.

2. Fuses - Sections of control circuits may be isolated using fused connections as shown in the schematic diagrams. Fuse Blocks shall be:

a. Located on the CRP side panels.

b. May be either panel or DIN rail mounted.

c. 2-pole or 3-pole rated 30A and 600 Volts, screw connected.

d. "Finger safe" design and not require special tools to open or remove fuses.

e. Optionally, DIN rail mounted circuit breakers may be substituted with prior written authorization.

3. Wire Requirements - Control wiring inside and between individual panels shall be completed as follows:

a. Digital signal and internal power: No.14 AWG SIS, rated 600 Volts, 90°C.

b. Current transformers: No.12 AWG SIS, rated 600 Volts, 90°C.

c. Digital Input/Output (I/O) wiring to devices with 'connectorized' terminals may use #16 AWG SIS wiring to the relay panel or device where large wire cannot be terminated at the device. Wiring between terminal blocks shall be #14 AWG.

d. #16 AWG SIS may be used for other applications with prior authorization from the Engineer.

e. Communication, instrument signal and similar wiring required for specialty applications shall be as recommended by the supplier of the associated equipment.

f. All control and signal wiring shall be terminated by way of a compression style lug or terminating device as follows. Deviation from the methods or alternate termination methods outline below may not be used without written approval from the Engineer prior to beginning fabrication.

1) Control and instrument wire –Insulated locking spade or fork lug.

2) Current transformer leads – Insulated ring tongue lug.

3) Wires terminating in clamp style terminals shall be tinned or fitted with ferrules.

4) Termination of bare stranded control or signal wire SHALL

NOT be permitted.

4. Communication Cables - All communication and specialty interconnection wiring shall be completed as shown on the network Drawings and as required to provide a complete communication network within the limits of the PCE. Connections to communication network external to the PCE shall be provided for when required.

Rev. 08/2023 33 72 33-20 Power Control Enclosure

5. Fiber Optic Equipment - A fiber optic patch panel shall be mounted in the PCE. The minimum requirements, unless otherwise shown in the Drawings, are:

a. Patch panel to be Corning WCH-12P including four (4) each CCH-

CP12-G5 and four (4) each CCH-CP12-19T, or an approved equivalent.

b. Size to accommodate two (2) 48 fiber cables.

c. Supply connector or adapter plates for single mode and multimode simplex ST connectors.

d. Provide and install fiber optic patch cords and jumpers between devices and the patch panel as shown on the communication…