Revised_Switchboard_Specifications_(26_24_13_-_Low_Voltage_Switchboards_-_Addendum_No._1_(062026)).pdf

CITY OF HOMESTEAD 26 24 13-1

WASTEWATER TREATMEANT PLANT BACKUP GENERATORS

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SECTION 26 24 13

LOW VOLTAGE SWITCHBOARDS

PART 1 – GENERAL

1.01 SUMMARY

A. Definitions

1. SWITCHBOARD MANUFACTURER (manufacturer) – The entity responsible for furnishing of equipment specified in this section, and responsible for manufacturing, factory testing, and warrantying the low voltage switchboards.

B. Scope

1. This section specifies the requirements for providing two (2) complete and operable low voltage switchboards.

2. SWITCHBOARD MANUFACTURER shall provide equipment in conformance to the specified requirements. The furnished equipment shall be subject to review for all applicable permits, inspection, and approval by the proper authorities in local jurisdiction of such work. SWITCHBOARD MANUFACTURER shall provide all switchboard equipment production model technical information necessary for others to apply for permits, inspections, and approvals. The local jurisdictions are the City of Homestead, Miami-Dade County, and the State of Florida.

3. The SWITCHBOARD MANUFACTURER shall verify that all devices necessary for a properly functioning switchboard, as specified herein, have been provided.

1.02 THE REQUIREMENT

A. The SWITCHBOARD MANUFACTURER shall furnish in satisfactory operation the low voltage switchboards (SWBDs) as specified herein and indicated on the Drawings.

B. Reference the following Specification Sections:

1. Section 26 09 16 – Electric Controls and Relays

2. Section 26 43 13 – Surge Protective Devices

C. The SWBD line-ups shall contain circuit breakers, metering equipment, control devices, and all accessories as specified herein, indicated on the Drawings, and as required to result in a complete and operable power distribution equipment assembly.

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D. The SWITCHBOARD MANUFACTURER shall also manufacture the structure and major equipment components, which includes, but is not limited to, circuit breakers, power monitoring equipment, meters, relays, instrument transformers, controls, ATC, and other components of the equipment assembly. Sub-contracting of wiring is not acceptable.

E. The SWBDs shall be assembled using NEMA rated components. Components designed and built to International Electrotechnical Commission (IEC) standards are not recognized. Equipment designed, manufactured, and labeled in compliance with IEC standards is not acceptable.

F. The low voltage switchboards and all associated equipment furnished under this section shall comply with all applicable Build America, Buy America (BABA) requirements.

G. Materials and equipment shall be delivered to the job site factory tested and ready for installation. The SWITCHBOARD MANUFACTURER may be required to store and maintain the low voltage switchboards until the site is ready for delivery. Three (3) months of storage shall be considered for bid purposes. The SWITCHBOARD

MANUFACTURER shall provide full insurance coverage for all equipment until its arrival at the job site.

1.03 CODES AND STANDARDS

A. All equipment shall be Listed by and shall bear the Label of Underwriter's Laboratories, Incorporated (UL).

B. The equipment shall be designed, manufactured, and/or Listed to the following standards as applicable:

1. American National Standards Institute (ANSI)/Institute of Electrical and Electronic

Engineers (IEEE):

a. ANSI/IEEE C12.1 – Code for Electricity Metering.

b. ANSI/IEEE C57.13 – Instrument Transformers.

2. National Electrical Manufacturers Association (NEMA):

a. NEMA PB 2 – Deadfront Distribution Switchboards.

3. National Fire Protection Association (NFPA):

a. NFPA 70 – National Electrical Code (NEC).

4. Underwriters Laboratories (UL):

a. UL 98 – Enclosed and Dead -Front Switches.

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b. UL 489 – Molded Case Circuit Breakers, Molded Case Switches, and Circuit

Breaker Enclosures.

c. UL 891 – Switchboards.

d. UL 1066 – Low-Voltage AC and DC Power Circuit Breakers Used in

Enclosures.

1.04 SUBMITTALS

A. In accordance with the procedures and requirements set forth in the General Conditions, the SWITCHBOARD MANUFACTURER shall submit the following:

1. Shop Drawings

2. Operation and Maintenance Manuals

3. Spare Parts List

4. Proposed Testing Methods

5. Reports of Certified Shop and Field Tests

6. Manufacturer’s Representatives Installation Certification

7. Functional Testing Plan for Automatic Transfer Controls

B. Each submittal shall be identified by the applicable Specification Section.

1.05 SHOP DRAWINGS

A. Each submittal shall be complete in all respects, incorporating all information and data listed herein and all additional information required for evaluation of the proposed equipment's compliance with the Contract Documents.

B. Partial, incomplete, or illegible submissions will be returned to the SWITCHBOARD

MANUFACTURER without review for resubmittal.

C. Shop drawings for each SWBD assembly shall include but not be limited to:

1. A Compliance, Deviations, and Exceptions (CD&E) letter. If the shop drawings are submitted without this CD&E letter, the submittal will be rejected. The letter shall include all comments, deviations, and exceptions taken to the Drawings and

Specifications by the SWITCHBOARD MANUFACTURER AND Equipment

Manufacturer/Supplier. This letter shall include a copy of this Specification Section.

In the left margin beside each and every paragraph/item, a letter "C", "D", or "E" shall be typed or written in. The letter "C" shall be for full compliance with the

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requirement. The letter "D" shall be for a deviation from the requirement. The letter

"E" shall be for taking exception to a requirement. Any requirements with the letter

"D" or "E" beside them shall be provided with a full typewritten explanation of the deviation/exception. Handwritten explanation of the deviations/exceptions is not acceptable. The CD&E letter shall also address deviations and exceptions taken to each Drawing related to this Specification Section.

2. Bill of material list for each SWBD assembly including each SWBD compartment.

3. Equipment specifications and product data sheets identifying all electrical ratings.

This information shall include all equipment and devices comprising the SWBD.

4. Complete assembly, layout, anchoring, and installation drawings with clearly marked dimensions. Plan, front, and side view drawings, including overall dimensions of the SWBD assembly. Identify shipping splits and show conduit stub-up area locations on the Drawings.

5. Approximate total shipping weight of each shipping split and/or equipment assembly, and total assembled equipment line-up weight.

6. Complete, custom one-line diagram and complete three-line diagram for the

SWBD line-up. The diagrams shall indicate the devices comprising the SWBD assembly including, but not limited to, circuit breakers, control power and instrument transformers, meters, relays, control devices, and other equipment comprising the complete assembly. Clearly indicate electrical ratings of all devices.

7. Complete, custom internal wiring diagram of each SWBD compartment/assembly.

Each wiring diagram shall include wire identification and terminal numbers.

8. Internal compartment-to-compartment interconnection wiring diagrams including wiring identification and terminal numbers.

9. Example equipment nameplate data sheet.

10. Nameplate schedule for each compartment.

11. Key interlock scheme drawing and sequence of operations.

12. Manufacturer's installation instructions.

13. Manufacturer's written warranty statement.

D. The shop drawing information shall be complete and organized in such a way that the

Engineer can determine if the requirements of these specifications are being met.

Copies of technical bulletins, technical data sheets from "soft-cover" catalogs, and similar information which is "highlighted" or somehow identifies the specific equipment

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items the SWITCHBOARD MANUFACTURER intends to provide are acceptable and shall be submitted.

1.06 OPERATIONS AND MAINTENANCE MANUALS

A. The SWITCHBOARD MANUFACTURER shall submit operation and maintenance manuals in accordance with the procedures and requirements set forth in the General

Conditions. The manuals shall include:

1. Instruction books and/or leaflets.

2. Spare parts list.

3. Final as-built construction drawings (updated from those included in the shop drawings) incorporating all changes made in the manufacturing and installation process.

4. All other drawings, product information, and other materials originally included in the shop drawings, updated as necessary to reflect as-built conditions.

1.07 SPARE PARTS

A. The SWBDs shall be furnished with all spare parts as recommended by the equipment manufacturer. Spaces in SWBDs shall be furnished with installed spare circuit breakers where indicated on the Drawings.

B. In addition to the spare parts recommended by the manufacturer, the SWITCHBOARD

MANUFACTURER shall furnish the following minimum spare parts for each SWBD assembly:

Number

Required Description

1 set Fuses of each size and type provided.

1 Control power transformer of each size and type provided.

1 Lamps and lenses for indicating lights, each color.

1 Indicating lamp sockets for each type provided.

Pilot devices (e.g., pushbutton, selector switch, etc.) complete with contact blocks and legend plates for each type, color, size, and rating provided.

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1.08 IDENTIFICATION

A. Each SWBD line-up shall be identified with the identification name and/or number indicated on the Drawings (e.g., SWBD-DIST). A nameplate shall be securely affixed in a conspicuous place on the SWBD. Nameplates shall be as specified herein.

1.09 WARRANTY

A. SWITCHBOARD MANUFACTURER shall warrant that the material and workmanship of all components and the operation of the equipment is in accordance with the latest design practices and meets the requirements of this Specification.

B. Warranty shall include, but not be limited to the following:

1. Replace equipment/components found to be faulty, make changes in equipment arrangement, and/or make adjustments necessary to meet the equipment or functional requirements of this Specification.

2. System rewiring and component substitution/rebuild.

3. All accessories and appurtenances provided by the equipment manufacturer.

C. Warranty for each SWBD line-up shall be in effect for a period of 24 months following final acceptance of the SWBD.

PART 2 – PRODUCTS

2.01 MANUFACTURERS

A. The equipment covered by these specifications is intended to be standard equipment of proven performance as manufactured by reputable concerns. Equipment shall be designed, constructed, and installed in accordance with the best practices of the trade, and shall operate satisfactorily when installed as shown on the Drawings.

B. It is the intent of these specifications that the SWBDs be manufactured and assembled by a single manufacturer who shall be responsible for matching all components and providing equipment which functions together as a system. Subcontracting of wiring and/or third-party assembly is not acceptable.

C. The SWBDs shall be Pow-R-Line Xpert (PRLX) as manufactured by Eaton, Reliagear

LVSB by ABB, QED-2 LV Series as manufactured by The Square D Company, or

Siemens Energy & Automation, Inc. equivalent.

2.02 SWITCHBOARDS

A. General

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1. SWBD assemblies shall be UL 891 Listed and bear a UL label indicating the UL

File Number. Where indicated on the Drawings, SWBD shall be suitable for use as service equipment and shall be marked as such externally on the equipment enclosure.

2. The SWBD manufacturer shall provide all of the proper cable lugs for all cable connections as required to avoid field modifications. Cable lugs for connecting to

SWBD bus and/or circuit breakers 1600A and larger shall be irreversible compression type, lugs for all smaller bus connections shall be mechanical type lugs. Reference the Drawings for the quantity and size of conductors.

3. Circuit breakers shall be power circuit breakers (fixed type) or molded-case circuit breakers as indicated on the Drawings and as specified herein.

4. Provide key interlocks as indicated on the Drawings and as specified herein.

B. Ratings

1. Voltage rating shall be as indicated on the Drawings. The entire assembly shall be suitable for 600 volts maximum AC service.

2. The equipment assemblies shall be suitable for operation at the available fault current, 100,000 amperes rms symmetrical (minimum), unless indicated otherwise on the Drawings. The equipment assemblies shall be labeled to indicate the maximum available fault current rating, taking into account the structure, bussing, main/tie circuit breaker(s), and feeder/branch circuit devices. The short circuit current rating shall not be less than that specified herein or indicated on the

Drawings. All overcurrent protective devices in the SWBD assembly shall be fully rated, series rated systems are not acceptable.

3. Circuit breakers shall be 100% rated where indicated on the Drawings.

C. Structures

1. SWBD shall be deadfront type, completely metal enclosed, with self-supporting sections that are NEMA Type 1 industrial use enclosures for SWBD-DIST.

2. SWBD shall be deadfront type, completely metal enclosed, with self-supporting sections that are NEMA Type 3R industrial use enclosures for SWBD-GEN.

3. The sections shall be totally accessible from the front and the sides. Equipment assemblies requiring rear access are not acceptable. The framework shall be of

UL gauge steel for NEMA Type 1 enclosures, and 316 stainless steel for NEMA

Type 3R enclosures. Ventilation shall be provided as required.

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4. Enclosure interior and exterior finish paint color shall be ANSI 49 or 61 grey for

NEMA Type 1 enclosures, and painted white for NEMA Type 3R enclosures, using the manufacturer’s standard painting process. The color of the back panels located within the enclosure shall be white.

5. All wire troughs shall have hinged doors.

6. Structure front covers shall not obscure any portion of the rating information or trip unit of any circuit breaker.

7. Unless otherwise noted, the SWITCHBOARD MANUFACTURER is responsible for coordinating structure top or bottom conduit entry requirements with the Engineer during Shop Drawing review.

8. Main Lug Section(s): Where indicated on the Drawings, the SWBD assembly shall include main lug section(s).

a. Main lug sections shall have adequate space to terminate the quantity and size of conductors shown on the Drawings and shall be configured for top or bottom conduit entry as required.

9. Main/Tie Circuit Breaker Section(s): Where indicated on the Drawings, the SWBD assembly shall include main and tie circuit breaker section(s).

a. Main and tie sections shall have grounded vertical steel barriers to provide separation from adjacent sections.

b. Main circuit breakers shall be configured for top or bottom conduit entry as required.

10. The distribution sections shall include group-mounted and/or individually mounted feeder/branch circuit breakers which shall be totally front accessible and front connectable. The circuit breaker connections to the distribution panel bussing shall be bolt-on design such that the connections grip the bus bars firmly under high-fault conditions.

11. Each structure located outdoors shall be furnished complete with one fused, thermostatically controlled space heater. Space heaters shall be tubular type operated at half voltage for long life; 250 volt rated heaters at 120-volt. Provide power supplies to the space heaters as specified herein and indicated on the

Drawings. The Contractor shall wire heaters to provide temporary heating during storage.

D. Bus

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1. All bus shall be tin-plated copper. The bussing shall be of sufficient cross-sectional area in accordance with UL 891 to limit the temperature rise on any current carrying part to a maximum of 65 degrees C above a maximum ambient of 40 degrees C. The fully rated main bus shall have an ampacity as indicated on the

Drawings, be 100 percent rated, and extend the full length of the equipment. The ground bus shall be sized per UL 891 and installed in the entire length of the equipment assembly.

2. Where 3-wire bus is indicated on the Drawings, the SWBD shall be furnished with

3 phase busses and a ground bus. In addition, if a transformer with a grounded wye secondary is shown on the Drawings to be supplying a 3-wire SWBD, a neutral landing pad shall be furnished within the SWBD for each incoming supply to provide a place to terminate the grounded conductor. Providing a 4-wire bus (3 phases plus neutral) for a 3-wire system is not acceptable.

3. Where a 4-wire bus is indicated on the Drawings, the SWBD shall be furnished with 3 phase busses, a neutral bus of equal ampacity to the phase bus, and a ground bus.

4. The distribution SWBD bus shall be rated as required by the rating of the mounted feeder/branch devices, including spares or spaces. Full height vertical bus shall be provided to accommodate future circuit breakers. Less than full height vertical bus which will only accommodate the circuit breakers included for this project is unacceptable.

5. Where required by the NEC, a bonding jumper, sized in accordance with the NEC, shall be installed between the SWBD ground bus and the neutral bus or neutral landing pad.

E. Molded-Case Circuit Breakers

1. Unless otherwise shown on the Drawings, circuit breakers shall be manually operated molded case type, UL 489 Listed, rated 480 VAC, 3 pole, and have 100 ampere or larger frames. The interrupting rating shall match that of the SWBD short circuit rating at 480V.

2. Overload protection shall be provided on all poles with trip settings as indicated on the Drawings. Where indicated on the Drawings, breakers shall have solid-state electronic trip units (ETUs) with features and adjustable segments as shown.

a. Long-time, short-time, and ground fault segments shall have both adjustable pickup and adjustable delay.

b. Instantaneous segments shall have an adjustable pickup in addition to any high-fault trip override.

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c. Trip units shall be Eaton PXR25, Square D Micrologic 5.0A/6.0A, ABB Ekip

Touch, or Siemens ETU 576/586.

d. For circuit breakers of frame size 250A or larger, ETUs shall be field interchangeable.

e. All main and tie circuit breaker trip units (regardless of size) as well as feeder circuit breaker trip units for circuit breakers 1200A frame or larger shall be provided with an arc energy reduction mode to reduce arc-flash energy. Arc energy reduction mode shall be activated by a factory-wired illuminated selector switch mounted on the SWBD door with lockable cover (or switch-and-cover with separate indicator light). Provide dry contact from the trip unit to make arc energy reduction mode status available for remote monitoring.

3. Where indicated on the Drawings, shunt trip devices shall be provided to trip a circuit from a remote location by means of a trip coil energized from a separate circuit. A 120V shunt trip shall be capable of operating 55% or more of rated voltage. All other shunt trips shall be capable of operating at 75% or more of rated voltage.

4. Circuit breakers shall be provided with permanently mounted hardware for padlocking the circuit breaker in the open position.

F. Power Circuit Breakers

1. Where specifically indicated on the Drawings, circuit breakers shall be insulated case type power circuit breakers.

2. Power circuit breakers shall be UL 1066 Listed for application at 100 percent of their continuous current rating, rated 480 VAC, 3 pole. The interrupting rating shall match that of the SWBD short circuit rating at 480V.

3. Power circuit breakers shall utilize a two-step stored-energy mechanism to charge the closing springs. The closing of the circuit breaker shall automatically charge the opening springs Power circuit breakers of equal rating shall be completely interchangeable.

4. Power circuit breakers shall be electrically operated (E.O.). All power circuit breakers shall be provided with a manual handle for manually charging the closing springs.

5. Electrically operated power circuit breakers shall be furnished with a 120 VAC powered spring charging motor, shunt trip device, and electrically operated spring release device.

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6. Each power circuit breaker faceplate shall include a spring charge indicator, push-to-trip button, push-to-close mechanism release button, and open-close indicator.

7. Power circuit breakers shall be fixed-mount type as indicated on the Drawings.

8. Equip each power circuit breaker with padlocking provisions to prevent manual or electric closure of the circuit breaker.

9. Equip each power circuit breaker with current sensors and a self-powered microprocessor-based trip device to sense overload and short circuit conditions.

a. Trip devices shall be removable and interchangeable so that any trip device can be used with any frame size power circuit breaker.

b. The device shall measure true RMS currents. Peak sensing devices will not be accepted. All adjustment setting switches shall be digitally encoded type with gold contacts.

c. Trip units shall have adjustable segments as indicated on the Drawings.

Long-time, short-time, and ground fault segments shall have both adjustable pickup and adjustable delay. Instantaneous segments shall have an adjustable pickup in addition to any high-fault trip override.

d. All main and tie circuit breaker trip units (regardless of size) as well as feeder circuit breaker trip units for circuit breakers 1200A frame or larger shall be provided with an arc energy reduction mode to reduce arc-flash energy. Arc energy reduction mode shall be activated by a factory-wired illuminated selector switch mounted on the SWBD door with lockable cover (or switch-and-cover with separate indicator light). Provide dry contact from the trip unit to make arc energy reduction mode status available for remote monitoring.

e. Trip units shall have programmable alarm relays that activate based on threshold and time delay values associated with any of the measured parameters. Alarm output operation shall be recorded in an event log that is saved in the trip unit’s memory.

f. The trip unit shall include an integral test pushbutton. A keypad shall be provided to enable the user to select the values of test currents within a range of available settings. The protection functions shall not be affected during test operations. The breaker shall be able to be tested in the TRIP or

NO TRIP test mode.

g. Trip units shall be furnished complete with all additional modules required to facilitate all trip unit functions. Trip units shall be the Eaton PXR25, Square D

Micrologic 5.0X/6.0X, ABB Ekip Touch, or Siemens ETU 776.

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10. Provide a minimum of two (2) normally open and two (2) normally closed auxiliary contacts for remote indication of power circuit breaker open/closed status.

G. Key Interlocks (SWBD-GEN)

1. Normally the SWBD-GEN-M circuit breaker shall be in the CLOSED position, and the SWBD-GEN-P circuit breaker shall be in the OPEN position.

2. SWBD-GEN-M circuit breaker shall be interlocked with SWBD-GEN-P circuit breaker by key interlocks. Key interlocks shall be accessible without opening the circuit breaker compartment door and shall function as follows:

a. Permit closing of SWBD-GEN-P when SWBD-GEN-M is OPEN.

b. Prevent closing of SWBD-GEN-P when SWBD-GEN-M is CLOSED.

3. Key interlocks shall ensure that the permanent generator sources and the portable generator shall not be paralleled under any conditions.

H. SWBD-GEN shall include a contact point that shall annunciate at a location remote from the engine-generators to indicate that the permanent emergency source is disconnected from the emergency system.

I. Current Transformers (CTs)

1. Ring type current transformers (CTs) shall be dry type, for indoor service, insulated for 600 volts, 10 kV BIL. Design shall have a mechanical and thermal rating to withstand short-circuit current, stresses, and heating effects equal to the rating of the circuit breaker of the application.

2. Current ratio shall be as indicated on the Drawings.

3. Instrument transformers shall be rated in accordance with ANSI Standard

C37.20.1 and IEEE C57.13, accuracy class 0.3. Furnish CTs with metering burden designation B-0.3, minimum. The CTs shall be sized for the necessary burden for the required devices, minimum.

4. Identify the CTs for polarity with standard marking or symbols. The CTs shall be capable of carrying rated primary current continuously without damage.

5. Run secondary wiring from CTs in suitable wiring trough, or conduit, to proper short-circuiting type terminal blocks for connection to relays, instruments, and other devices.

6. Door mounted test blocks for all CTs in the SWBD shall be provided.

J. Potential Transformers (PTs)

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1. Potential transformers (PTs) shall be indoor dry type, single-phase, 60 hertz.

2. PTs shall have a 10kV BIL and an accuracy classification determined according to

ANSI Standards. The PTs shall be suitable for 0.3 metering accuracy at the burden to be served for the required devices plus 20 percent. Primary and secondary voltages shall be as indicated on the Drawings.

3. Connect secondaries to potential buses as required. Protect PTs with primary and secondary fuses. Protect primary side with current-limiting fuses.

4. Door mounted test switches for all PTs in the SWBD shall be provided. Test switch wiring shall be plainly marked to indicate the respective circuits to each pole of the switch.

K. Control Power Transformers (CPTs)

1. Provide 480 to 120 VAC control power transformers as required with adequate capacity for the load to be served. For SWBD assemblies with more than one bus

(e.g. main-tie-main systems), provide a control power transformer for each bus with the secondaries tied together through best-source selection hardware.

2. Protect control power transformers with both primary and secondary fuses. Protect primary side with current limiting fuses. Provide a manual disconnect ahead of the primary fuses.

3. Control power transformers shall each be sized to supply the following control circuits:

a. Constant power for all trip unit displays in the assembly.

b. Spring charging mechanisms for all electrically operated circuit breakers, sized to operate two spring charging mechanisms simultaneously.

4. Provide separate control power transformers for space heaters, lighting, receptacles and other ancillary loads separate from those used for the control circuits identified above.

L. Control Wiring and Control Terminal Blocks

1. Wire and factory test SWBD to satisfy the requirements of the operation described or as necessary.

2. All control wiring shall be No. 14 AWG (minimum). Power wiring shall be sized to suit the maximum load rating of unit; No. 12 AWG (minimum). For current transformer (CT) circuits, minimum wire size shall be No. 12 AWG (number 10

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AWG or larger wire shall be used to decrease resistance as required). Wiring shall be type MTW rated for 105°C.

3. Route control wires for outgoing or "compartment-to-compartment" interconnecting wiring to master terminal blocks with suitable numbering strips numbered in agreement with the manufacturer's detailed wiring diagrams. Provide a minimum of

10 percent (10%) spare terminal blocks for each circuit breaker and auxiliary compartment.

4. Terminal blocks for control wiring shall be provided in accordance with Section 26

09 16 – Electric Controls and Relays.

5. Number wiring with shrink-type tag devices at both ends consistent with the manufacturer's detailed wiring diagrams. Duplication of wire numbers and terminal block numbers is not acceptable.

M. Power Monitoring, Instruments, and Control Devices

1. Where indicated on the Drawings, provide power monitors with door-mounted graphic display modules. Power monitors shall be PXM1300 Series as manufactured by Eaton, PowerLogic ION7650 as manufactured by Square D

Company, or EPM 9900P by Multilin. Power monitor manufacturer shall match the manufacturer of the circuit breakers and other components of the SWBD assembly. All PTs and CTs, power supplies, wiring, and other devices indicated on the Drawings, and as required, shall be provided for a complete monitoring system.

2. Power monitors shall be provided with sufficient on-board memory to store up to

50,000 user-defined event files and a network communications port to communicate with the control system via Ethernet/IP protocol. Provide any necessary hardware gateways to provide this communication capability. The following parameters shall be communicated as a minimum:

a. Current (all phases).

b. Voltage (all phases).

c. KW, KVAR, KVA.

d. Power Factor.

3. Furnish instruments, meters, and control devices complete with devices and associated circuitry necessary to perform the required functions in accordance with these Specifications.

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4. Furnish and install control devices as required and/or shown on the Drawings. The following control devices shall be provided as specified in Section 26 09 16 –

Electric Controls and Relays:

a. Pilot devices (e.g., switches, indicating lights, etc.).

b. Relays and timers, if required.

N. Nameplates and Legend Plates

1. Provide engraved high pressure plastic nameplates to identify each SWBD, each compartment, and associated door mounted devices and internal components.

Nameplates shall be back with white lettering.

2. Equipment names and/or numbers and device identification text shown on the

Drawings shall be used as the basis to engrave the nameplates and legend plates.

Where the equipment identification text would exceed the capacity of the SWBD manufacturer’s standard nameplate/legend plate size, the manufacturer shall provide larger nameplates and/or additional nameplates as necessary.

Abbreviating equipment names/numbers and device identification text is not acceptable.

3. Provide a master nameplate listing SWBD designation, voltage rating, ampere rating, short circuit rating, manufacturer's name, general order number, and item number.

4. Control components mounted as part of the assembly, such as fuse blocks, control relays, pushbuttons, switches, and similar devices, shall be suitably marked for identification corresponding to appropriate designations on the manufacturer's wiring diagrams.

O. Warning Signs

1. Provide a minimum of two (2) warning signs on the front of the SWBD line-up (and two (2) on the rear, where the rear of the line-up is accessible).

a. Red laminated plastic engraved with white letters approximately ½-inch high.

b. Signs shall read "DANGER HIGH VOLTAGE"

P. Source Quality Control

1. Completely assemble, wire, and test SWBDs at the factory. Detailed inspections before and after assembly shall assure correctness of design and workmanship.

Provide groups of wires leaving the shipping-assembled equipment with terminal blocks with suitable numbering strips.

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2. After assembly, provide the SWBDs with lifting channels having eyebolts for attachment of crane slings to facilitate lifting and handling each shipping-assembly unit. These lifting channels shall be removable after equipment is placed on permanent foundations.

Q. Accessories

1. SWBD accessories shall be provided as follows:

a. Test plugs for draw-out relays and meters, if applicable.

b. A 4” infrared inspection port in the front door of each main/tie circuit breaker section. IR ports shall be located to allow IR observation of the cable terminations within the compartment. IR ports shall meet requirements of

IEEE C37.20.2, shall maintain NEMA rating of SWBD enclosure when in use.

R. Operations and Interlocks for SWBD-DIST

1. Normally, the 480V bus section will operate with the utility source breaker in the

CLOSED position, and the alternate source breaker in the OPEN position.

2. SWBD-DIST shall incorporate electrical interlocks to prevent paralleling between the utility source and any alternate source, including permanent or portable generator(s). Paralleling shall not be permitted under any conditions or operating modes, regardless of the position of the automatic/manual selector switch or any operator action.

3. Provide a selector switch for selection between automatic and manual operation of the permanent generators. Operation of the portable generator shall be permitted only in manual position. Normally, the selector switch for selection between automatic and manual operation of the connected generator(s) shall be in automatic unless manually changed to manual by the operator.

4. When the automatic/manual selector switch is in manual, the Automatic Transfer

Controller (ATC) shall be locked out.

5. The ATC shall prevent the following:

a. Closing of the alternate source breaker when the utility source breaker is in the CLOSED position.

b. Closing of the utility source breaker when the alternate source breaker is in the CLOSED position.

6. Control Sequence

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a. It is the intent of this specification that the switchboard control system will control the utility source breaker and the alternate source breaker. Source switching shall be open transition.

1) Initial conditions

a) Utility present. Utility source breaker closed.

b) Alternate source breaker open.

c) Permanent generators off.

2) Utility power failure when automatic/manual selector switch is in automatic operation and SWBD-GEN-M is closed.

a) Initiate sequence when utility power source fails and the system control switch is in the auto mode.

b) Open utility source breaker

c) Start permanent generators via Master Paralleling Controller.

d) When permanent generator voltage ≥ 460V and frequency is

59.5 ≤ f ≤ 60.5, close alternate source breaker.

e) Supply plant load as required.

3) Return to utility source from alternate source

a) Initiate sequence automatically when utility bus voltage and frequency are 460V-510V, 59.5 ≤ f ≤ 60.5 for an adjustable time delay, and the system control switch is in the Auto mode.

b) Open the alternate source breaker. The permanent generator(s) shall then run in an unloaded cooldown mode for an adjustable time delay.

c) Close the utility source breaker to supply plant load.

S. Surge Protective Devices

1. Surge protective devices (SPD) shall be provided integral to the SWBD enclosure, as indicated on the Drawings. See Section 26 43 13 – Surge Protective Devices for SPD requirements.

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LOW VOLTAGE SWITCHBOARDS PRE-PURCHASE PACKAGE

PART 3 – EXECUTION

3.01 INSTALLATION

A. The SWBD shall be furnished as specified herein and shown on the Drawings. One (1) copy of the manufacturer’s installation instructions shall be included with the equipment at time of shipment. The equipment shall be suitably protected until accepted by the

Owner.

B. The equipment shall be installed and checked in accordance with the manufacturer's recommendations. This shall include but not limited to:

1. Checking to ensure that the pad location is level to within .125 inches over 3 feet in any direction.

2. Checking to ensure that all bus bars are torqued to the manufacturer's recommendations.

3. Assemble all shipping sections, remove all shipping braces, and connect all shipping split mechanical and electrical connections.

4. Secure assemblies to foundation or floor channels.

5. Inspect and install all circuit breakers in their proper places.

6. Install power cable lashing as outlined in the manufacturer’s installation instructions for the equipment.

3.02 PAINTING

A. Prior to final completion of the work, all metal surfaces of the equipment shall be cleaned thoroughly, and all scratches and abrasions shall be retouched with the same coating as used for factory finishing coats.

3.03 TESTING

A. All tests shall be performed in accordance with the requirements of the General

Conditions. The following tests are required:

1. Witness Shop Tests

a. Not required.

2. Certified Shop Tests and Reports

a. Submit description of proposed testing methods, procedures, and apparatus.

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LOW VOLTAGE SWITCHBOARDS PRE-PURCHASE PACKAGE

b. Submit notarized and certified copies of all test reports. As a minimum, the entire SWBD assembly shall go through a quality inspection before shipment. This inspection shall include, but is not limited to, the following:

1) Physical inspection of the structure and the electrical conductors including bussing, general wiring, and units.

2) General electrical tests including power circuit phasing, control circuit wiring, instrument transformers, meters, ground fault system, and device electrical operation.

3) AC dielectric tests of the power circuits and control circuits.

4) Markings/labels, including instructional type, Underwriters Laboratory

(UL), and inspector's stamps.

c. The manufacturer shall use integral quality control checks throughout the manufacturing process to maintain the correctness of the SWBD.

3. Field Tests

a. Field testing shall be done in accordance with the requirements specified in the General Conditions, and NETA Acceptance Testing Specifications.

3.04 SERVICES OF MANUFACTURER'S REPRESENTATIVE

A. The SWITCHBOARD MANUFACTURER shall provide the services of a qualified, factory-trained manufacturer's technical representative who shall adequately supervise the installation and testing of all equipment furnished under this Contract. The manufacturer's representative shall certify in writing that the equipment has been installed in accordance with the manufacturer's recommendations. No further testing or equipment startup may take place until this certification is accepted by the Owner.

B. The manufacturer’s technical representative shall perform startup and functional testing of the SWBD as specified herein.

C. The manufacturer’s technical representative shall also perform startup and functional testing of the switchboard controls. Functional testing shall include field verification of each and every part of the sequence of operations listed herein. Representatives from the Owner and the Engineer shall be present to witness the functional testing.

1. Prior to commencement of the functional testing, a test plan shall be submitted for

Owner and Engineer approval. Test plan shall demonstrate how each part of the sequence of operations will be tested, and shall detail any required outages, switchovers, etc. that will be performed during the testing.

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LOW VOLTAGE SWITCHBOARDS PRE-PURCHASE PACKAGE

D. The SWITCHBOARD MANUFACTURER shall provide training for Owner personnel.

Training shall be conducted by the manufacturer's factory-trained representative who shall instruct Owner personnel in operation and maintenance of all equipment provided under this Section. Training shall be provided for two (2) sessions of four (4) hours each.

Training shall not take place until after all SWBD units have been installed and energized. Training shall be at times coordinated with the Owner.

E. The services of the manufacturer's representative shall be provided for a period of not less than as follows:

1. One (1) trip of two (2) working days during the installation of the SWBD.

2. One (1) trip of two (2) working days for the testing and startup of the SWBD.

3. One (1) trip of one (1) working day to perform training as specified herein.

4. One (1) trip of one (1) working day two (2) months before the warranty expiration to identify any issues to be corrected under warranty.

F. Any additional time required to achieve successful installation and operation shall be at the expense of the Contractor.

3.05 FIELD ADJUSTMENTS

A. All adjustable settings of circuit breakers shall be set in the field by the entity responsible for protective device setting and testing in accordance with the settings designated in the coordination study.

END OF SECTION