Amendment 0009 - 26 24 19.00 40.pdf

Fuel Storage Replacement Amendment 0007 Quonset, ANG Rhode Island September 24, 2020

SECTION 26 24 19.00 40

MOTOR CONTROL CENTERS

11/14

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASME INTERNATIONAL (ASME)

ASME B1.1 (2003; R 2018) Unified Inch Screw Threads (UN and UNR Thread Form)

ASME B1.20.1 (2013) Pipe Threads, General Purpose (Inch)

ASTM INTERNATIONAL (ASTM)

ASTM B187/B187M (2016) Standard Specification for Copper, Bus Bar, Rod and Shapes and General Purpose Rod, Bar and Shapes

ASTM B317/B317M (2007; R 2015; E 2016) Standard Specification for Aluminum-Alloy Extruded Bar, Rod, Tube, Pipe, Structural Profiles, and Profiles for Electrical Purposes (Bus Conductor)

ASTM D709 (2017) Standard Specification for Laminated Thermosetting Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C2 (2017; Errata 1-2 2017; INT 1 2017) National Electrical Safety Code

IEEE C57.13 (2016) Requirements for Instrument Transformers

IEEE C63.2 (2009) Standard for Electromagnetic Noise and Field Strength Instrumentation, 10 Hz to 40 GHz - Specifications

IEEE C63.4 (2014) American National Standard for Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2017; Errata 2017) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

SECTION 26 24 19.00 40 Page 1

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA AB 3 (2013) Molded Case Circuit Breakers and Their Application

NEMA ICS 1 (2000; R 2015) Standard for Industrial Control and Systems: General Requirements

NEMA ICS 2 (2000; R 2005; Errata 2008) Industrial Control and Systems Controllers, Contactors, and Overload Relays Rated 600 V

NEMA ICS 4 (2015) Application Guideline for Terminal Blocks

NEMA ICS 6 (1993; R 2016) Industrial Control and Systems: Enclosures

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017; ERTA 1-2 2017; TIA 17-1; TIA 17-2;

TIA 17-3; TIA 17-4; TIA 17-5; TIA 17-6;

TIA 17-7; TIA 17-8; TIA 17-9; TIA 17-10;

TIA 17-11; TIA 17-12; TIA 17-13; TIA

17-14; TIA 17-15; TIA 17-16; TIA 17-17 )

National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 44 (2018) UL Standard for Safety Thermoset-Insulated Wires and Cables

UL 489 (2016) UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 506 (2017) UL Standard for Safety Specialty Transformers

UL 508 (2018) UL Standard for Safety Industrial Control Equipment

UL 845 (2005; Reprint Oct 2018) UL Standard for Safety Motor Control Centers

UL 1063 (2017) UL Standard for Safety Machine-Tool Wires and Cables

1.2 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Motor Control Center Equipment Drawings ; G, A/E

SECTION 26 24 19.00 40 Page 2

SD-03 Product Data

Motor Control Center Equipment ; G, A/E

Molded Case Circuit Breakers ; G, A/E

Insulated Case Drawout Circuit Breakers ; G, A/E

Solid State Trip Units for each Breaker Type; G

SD-06 Test Reports

Factory Test Procedures ; G

Factory Test Results ; G

Final Test Reports ; G

Acceptance Tests ; G

SD-07 Certificates

Motor Control Center Certification ; G

SD-11 Closeout Submittals

Warranty ; G

Manufacturer's Instructions ; G

1.3 QUALITY CONTROL

1.3.1 Regulatory Requirements

In each of the publications referred to herein, consider the advisory provisions to be mandatory, as though the word, "shall" had been substituted for "should" wherever it appears. Interpret references in these publications to the "authority having jurisdiction," or words of similar meaning, to mean the Contracting Officer. Ensure equipment, materials, installation, and workmanship are in accordance with the mandatory and advisory provisions of NFPA 70 , IEEE C2 unless more stringent requirements are specified or indicated.

1.3.2 Qualifications

Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship. Provide products which have been in satisfactory commercial or industrial use for 2 years prior to bid opening. Ensure the 2-year period includes applications of equipment and materials under similar circumstances and of similar size. Ensure the product has been on sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2-year period. Where two or more items of the same class of equipment are required, these items must be products of a single manufacturer.

SECTION 26 24 19.00 40 Page 3

1.3.3 Standard Products

Ensure material and equipment are standard products of a manufacturer regularly engaged in their manufacture and essentially duplicate items that have been in satisfactory use for at least 2 years prior to bid opening. Ensure all materials conform to the requirements of these specifications. Materials are to be of high quality, free from defects and imperfections, of recent manufacture, and of the classification and grades designated. Ensure all materials, supplies, and articles not manufactured by the Contractor are the products of other recognized reputable manufacturers.

1.4 DELIVERY, STORAGE, AND HANDLING

Ship the motor control center equipment as completely assembled and wired as feasible so as to require a minimum of installation work. Ensure each shipping section is properly match marked to facilitate reassembly.

Provide equipment with removable lifting channels with eye bolts for attachment of crane slings to facilitate lifting and handling.

Carefully pack and ship separately any relay or other device which cannot withstand the hazards of shipment when mounted in place on the equipment.

Mark these devices with the number of the panel which they are to be mounted on and fully identified.

Wrap all finished painted surfaces and metal work to protect from damage during shipment. Prepare all parts for shipment so that slings for handling may be attached readily while the parts are in a railway car or transport truck.

Carefully package and clearly mark all spare parts and accessories.

Ensure sections of equipment crated for shipment are of such size, including crates, that they will pass through a 5 by 8-foot wall opening.

Locate motor control center equipment in well ventilated areas, free from excess humidity, dust and dirt and away from hazardous materials with ambient temperature between minus 22 and 104 degrees F . Ensure motor control center equipment is protected to prevent moisture from entering enclosure. Handle motor control center equipment in accordance with

NEMA ICS 2 .

1.5 MAINTENANCE

1.5.1 Accessories and Tools

Furnish a complete set of accessories and special tools unique to the equipment provided and required for erecting, handling, dismantling, testing and maintaining the apparatus.

1.5.2 Spare Parts

Furnish a list of spare parts as recommended by the manufacturer for the equipment. Ensure all spare parts are of the same material and workmanship, meet the same requirements, and are interchangeable with the corresponding original parts furnished.

SECTION 26 24 19.00 40 Page 4

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

These specifications include the design, fabrication, assembly, wiring, testing, delivery, installation and testing of the items of equipment and accessories and spare parts listed in the Schedule and shown on the drawings.

Submit motor control center equipment drawings , including all motor control units and protective devices. Provide a single-line diagram, equipment list and nameplate schedule. Includes descriptive data showing typical construction of the types of equipment proposed, including the manufacturer's name, type of molded case circuit breakers or motor circuit protectors, performance capacities and other information pertaining to the equipment. Ensure drawings show the general arrangement and overall dimensions of the motor control centers space requirements, details of any floor supports to be embedded in concrete and provisions for conduits for external cables. Include within the NEMA Class IIS motor control center drawings a connection diagram with wire designations and schematic diagrams to illustrate operation of associated motor unit controls.

Include complete wiring diagrams for each motor control center. Provide wiring diagrams in a form showing physical arrangement of the control center with interconnecting wiring shown by lines or by terminal designations (wireless).

2.1.1 Compliance

Provide equipment conforming to the requirements of NFPA 70 unless more stringent requirements are indicated herein or shown. NEMA rated and UL listed equipment has been specified when available. Equipment to meet NEMA and UL construction and rating requirements as specified. No equivalent will be acceptable. Immediately notify the Contracting Officer of any requirements of the specifications or proposed materials or assemblies that do not comply with UL or NEMA. International Electrotechnical Commission (IEC) rated equipment will not be considered an acceptable alternative to specified NEMA ratings.

2.1.2 Coordination

The general arrangement of the motor control centers is shown on the contract drawings. Any modifications of the equipment arrangement or device requirements as shown on the drawings is subject to the approval of the Contracting Officer. If any conflicts occur necessitating departures from the drawings, submit details of and reasons for departures and approved prior to implementing any change. Completely assemble all equipment at the factory. The motor control centers may be disassembled into sections, if necessary, for convenience of handling, shipping, and installation.

2.1.3 Nameplates

Provide nameplates of laminated sheet plastic in accordance with ASTM D709.

Ensure nameplates are melamine plastic 1/8 inch thick, black matte finish with white center core and square corners. Fasten the nameplates to the equipment in proper positions with anodized round-head screws. Accurately align lettering and engrave into the core. Lettering is a minimum 1/2-inch high normal block style. Nameplate designations are in accordance with lists on the drawings, and as a minimum provide for the

SECTION 26 24 19.00 40 Page 5 following equipment:

a. Motor Control Centers

b. Individual items of equipment mounted in the Motor Control Centers

Provide equipment of the withdrawal type with nameplates mounted on the removable equipment in locations visible when the equipment is in place.

2.2 FABRICATION

2.2.1 Ratings

Provide equipment with the following ratings:

a. Voltage rating: 480/277 volts AC, three-phase, 4-wire.

b. Continuous current rating of the main bus: 800 amperes.

c. Short-circuit current rating: 65,000 rms symmetrical amperes, or as indicated on drawings, whichever is greater .

d. UL listed and labeled for its intended use and as service entrance equipment .

2.2.2 Enclosures

Each motor control center consists of the required number of vertical sections of 90 inches nominal height, bolted together, with steel channel sills and suitable for mounting against a wall. Vertical sections are nominally 90 inches high and 20 inches deep with buses, control wiring, control transformers, small power transformers, terminal blocks, line terminals, cable supports, and clamps accessible from the front.

Enclosure is NEMA Type 1. Fabricate the motor control centers from smooth select steel sheets shaped and reinforced to form rigid free-standing structures. Ensure metal thickness for enclosures is no less than specified in NEMA ICS 6 without exception. Fabricate and bolt vertical edges of sections exposed to view so that the joints do not pass a 1/16 inch gauge. Design each structure for addition of future sections. Equip vertical sections with full length vertical isolating barriers between sections. Make provisions for leveling the assembled motor-control center sections and bolting them together so that they form a contiguous structural enclosure.

Provide removable 7 gauge lifting angles on the top of each section, extending the entire width of the section, capable of supporting the entire weight of the motor control center section without distortion.

Provide base channels with holes to facilitate floor mounting and leveling.

2.2.2.1 Unit Compartments

Provide each operating unit with equipment as shown on the drawings, mounted in an individual cell. The unit assembly, except main circuit breakers, panelboards and auxiliary control devices, is drawout type removed from the front, without rear access or disturbing other units in the control center assembly. Ensure all drawout type unit assemblies have a positive guide rail system to ensure alignment of connection to vertical bus. Mechanically interlock units with the door to prevent removal while in the energized position. Provide each removable unit with a provision

SECTION 26 24 19.00 40 Page 6 for padlocking in a position in which it is disconnected from the vertical bus, although not removed from the stationary structure. Provide all ventilating openings with corrosion-resistant insect-proof screens on the inside. Provide bus closing plugs for all unused openings in vertical bus barriers.

Ensure compartments for future motor-control units are complete with hardware, buses, and hinged doors ready to receive future draw-out units.

Compartments for spare motor-control units are complete with buses, hinged doors, and draw-out units but without load terminal connections. Spare spaces are complete with buses and screwed-on front cover plates.

2.2.2.2 Motor Control Center Doors and Covers

Provide each unit compartment, including blank compartments for future use, with either a flange-formed or a rolled-edge door. Mount each door on fully-concealed or continuous full-length piano-type hinges and provide with positive fasteners. Prevent door sag by proper alignment of hinges made of sufficiently strong material. Interlock the door fastenings to prevent opening when the equipment is energized. Ensure the external operating handle clearly indicates whether the equipment is in an "ON", "OFF" or "TRIPPED" position.

2.2.2.3 Horizontal Wireways

Provide a structure with a minimum 6 inches high wireway at the top and a 12 inches minimum wireway at the bottom. Both horizontal wireways to run the length of the structure. Provide cover plates on the side of the assembly to permit extension of the horizontal bus and wireway when vertical sections are added.

2.2.2.4 Vertical Wireways

Provide vertical wireways in all vertical sections. Connect vertical wireways with horizontal wireways at the top and bottom and be a minimum 4 inches wide. Provide barriers in sections containing both ac and dc circuits. Provide doors on each vertical wireway with the exposed surface of any door not deviating more than 1/16 inch from a true plane. Provide cable tie supports in the vertical wireway to hold cable and wiring in place

If communication wiring is required, add metal shielding in the vertical wiring trough to provide isolation from power and control wiring within the vertical wiring trough.

2.2.2.5 Sills

Furnish channel iron foundations, complete with bolts and drilled holes for grouting and anchoring to the floor, for the complete length (front and rear) of each motor control center assembly. Design the channels for flat mounting, maximum channel depth is 1-1/2 inches . Provide additional channel or substantial metal trim flush with the end panels to completely enclose the bases across the ends of the equipment assemblies.

2.2.2.6 Shutters

Provide drawout units with shutters which close when the unit is withdrawn to isolate the vertical bus.

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Fuel Storage Replacement

2.2.3 Buses

Ensure all buses are silver plated copper , and all bolted splices and connections between buses and for extensions or taps for equipment are tin or silver-plated throughout. Copper bars and shapes for bus conductors conform to the applicable requirements of ASTM B187/B187M , and ASTM B317/B317M . Bolt all splices for field assembly with at least two bolts and employ the use of "Belleville" washers in the connection. Base the bus ratings on a 149 degree Fahrenheit maximum temperature rise in accordance with UL 845 requirements. Ensure bus has a short-circuit current rating of not less than 65,000 RMS symmetrical amperes. Support all bus work on wet process porcelain insulators, glass polyester, or suitable molded material.

2.2.3.1 Horizontal Bus

Provide each control center assembly with a three-phase main horizontal bus, with a continuous current rating not less than 1,600 amperes, located across the top of each vertical section. Drill the ends of horizontal buses for future extensions.

2.2.3.2 Vertical Bus

Provide each vertical section with a three-phase vertical bus with a continuous current rating of 600 amperes connected to the horizontal bus by brazing, welding, or bolting. Where the incoming feeder breakers are located at the bottom of a control center, rate the vertical bus in that section the same as the main horizontal bus. Extend vertical buses from the horizontal bus to the bottom of the lowest available unit mounting space. Isolate the vertical bus from wireways and equipment in compartments.

2.2.3.3 Ground Bus

Provide a silver -plated copper ground bus full width at the bottom of the motor control center line-up. Provide a full clamp-type solderless copper or copper alloy lug for up to No. 4/0AWG stranded copper cable at each end of the bus for connection to the grounding system. Ensure the ground bus is capable of carrying the rated short-circuit current available in the motor-control center.

2.2.3.4 Neutral Bus

Furnish a fully rated neutral bus continuous through the control center with appropriate capacity.

2.2.4 Painting

Thoroughly clean the interior and exterior steel surfaces of equipment enclosures and then receive a rust-inhibitive phosphatizing or equivalent treatment prior to painting. Ensure exterior surfaces are free from holes, seams, dents, weld marks, loose scale or other imperfections.

Interior surfaces receives not less than one coat of corrosion-resisting paint in accordance with the manufacturer's standard practice. Prime exterior surfaces, fill where necessary, and give no less than two coats baked enamel with semigloss finish. Ensure equipment located indoors is ANSI Light Gray, All touch-up work is done with manufacturer's coatings.

SECTION 26 24 19.00 40 Page 8

Amendment 0007

2.3 EQUIPMENT

2.3.1 Connections

Ensure bolts, studs, machine screws, nuts, and tapped holes are in accordance with ASME B1.1 . Ensure the sizes and threads of all conduit and fittings, tubing and fittings, and connecting equipment are in accordance with ASME B1.20.1 . Provide ferrous fasteners with rust-resistant finish, and all bolts and screws equipped with approved locking devices. Manufacturer's standard threads and construction may be used on small items which are integrally replaceable, except threads for external connections to these items meet the above requirements.

2.3.2 Molded Case Circuit Breakers

Ensure molded case circuit breakers conform to the applicable requirements of UL 489 . Provide manually-operated circuit breakers of the quick-make, quick-break, common trip type. Furnish automatic-trip breakers unless otherwise specified or indicated on the drawings. Provide the common-trip multipole circuit breakers having a single operating handle and a two-position on/off indication and with provisions for padlocking in the "Off" position. Provide personnel safety line terminal shields for each breaker. Ensure the circuit breakers are products of only one manufacturer, and interchangeable when of the same frame size. Where indicated on the drawings, provide circuit breakers with shunt trip devices.

Size breakers as required for the continuous-current rating of the circuit. Provide the breaker class as required. The Government reserves the right to change the indicated trip ratings, within frame limits, of the trip devices at the time the shop drawings are submitted for approval.

Provide sufficient interrupting capacity maximum short-circuit current imposed on the circuit at the breaker terminals as indicated. Provide circuit breaker interrupting capacities with a minimum of 10,000 A and that conform to NEMA AB 3. Series rating of circuit breakers is not permitted.

Provide circuit breakers with temperature compensation for operation in an ambient temperature of 104 degrees F . Provide circuit breakers that have root mean square (rms) symmetrical interrupting ratings sufficient to protect the circuit being supplied.

2.3.3 Insulated Case Drawout Circuit Breakers

UL 489 . UL listed and labeled, 100 percent rated breakers, manually operated draw out type, low voltage, insulated-case circuit breaker, with a short-circuit current rating as indicated at 480/277 volts. Breaker frame size and trip ratings: as indicated on drawings. Series rated circuit breakers are unacceptable

Equip drawout breakers with disconnecting contacts, wheels, and interlocks for drawout application. Provide main, auxiliary, and control disconnecting contacts with silver-plated, multifinger, positive pressure, self-aligning type. Provide drawout compartment shutters to protect operators from accidental contact with breaker stabs when the breaker is withdrawn from its cubicle. Provide each drawout breaker with four-position operation with each position clearly identified by an indicator on the circuit breaker front panel as follows.

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a. Connected Position: Primary and secondary contacts are fully engaged. Breaker must be tripped before racking into or out of position.

b. Test Position: Primary contacts are disconnected but secondary contacts remain fully engaged. This position allows complete test and operation of the breaker without energizing the primary circuit.

c. Disconnected Position: Primary and secondary contacts are disconnected.

d. Withdrawn (Removed) Position: Places breaker completely out of compartment, ready for removal. Removal of the breaker actuates assembly that isolates the primary stabs.

2.3.4 Trip Units

Except as otherwise noted, Equip main and distribution breakers, with Solid-state Trip Units consisting of three current sensors and a microporcessor-based trip unit that provides true RMS sensing and adjustable time-current circuit protection. Provide the circuit breakers, of frame sizes and the trip unit ratings as shown on the drawings.

Provide Solid state trip units equipped with adjustable long time pick-up and delay,short time pick-up and delay,instantaneous, and ground fault pick-up and delay on frame sizes 225 amperes and larger. Set all protective devices in accordance with approved coordination study.

2.3.5 480-Volt AC Circuits

Rate circuit breakers for 480-volt or 277/480-volt ac circuits 600 volts ac, and have an UL listed minimum interrupting capacity of 65,000 symmetrical amperes at 600 volts ac.

2.3.6 Terminal Blocks

Use molded or fabricated circuit terminal blocks for wiring with barriers, rated not less than 600 volts. Provide terminals with removable binding, fillister or washer head screw type. Ensure terminals are no less than No. 10 in size and having sufficient length and space for connecting at least two indented terminals for 10 AWG conductors to each terminal. The terminal arrangement is subject to the approval of the Contracting Officer. Modular, pull apart, terminal blocks are acceptable provided they are of the channel or rail-mounted type. Submit data showing that the proposed alternate accommodates the specified number of wires, are of adequate current-carrying capacity, and are constructed to assure positive contact between current-carrying parts.

2.3.6.1 Short-Circuiting Type

Provide short-circuiting type terminal blocks for all current transformer secondary leads with provision for shorting together all leads from each current transformer without first opening any circuit.

2.3.6.2 Load Type

Provide load terminal blocks rated no less than 600 volts and of adequate capacity for the conductors for NEMA Size 3 and smaller motor controllers and for other power circuits except those for feeder tap units. Provide

SECTION 26 24 19.00 40 Page 10 the terminals of of the screw type, having length and space for at least two indented terminals of the size required on the conductors to be terminated. For conductors rated more than 50 amperes, use screws with hexagonal heads. Provide adequate contact surface and cross-section for conducting parts between connected terminals to operate without overheating. Each connected terminal has the circuit designation or wire number placed on or near the terminal in permanent contrasting color.

2.3.6.3 Marking Strips

Provide white or other light-colored plastic marking strips, fastened by screws to each terminal block, for wire designations. Mark the wire numbers with permanent ink. Provide reversible marking strips to permit marking both sides, or furnish two marking strips with each block.

Provide marking strips that accommodate the two sets of wire numbers.

Assigned a device designation to each device to which a connection is made in accordance with NEMA ICS 1 . Mark each device terminal to which a connection is made with a distinct terminal marking corresponding to the wire designation used on the Contractor's schematic and connection diagrams. The wire (terminal point) designations used on the Contractor's wiring diagrams and printed on terminal block marking strips may be according to the Contractor's standard practice; however, provide additional wire and cable designations for identification of remote (external) circuits for the Government's wire designations. Prints of shop drawings submitted for approval will be so marked and returned for addition of the designations to the terminal strips and tracings, along with any rearrangement of points required.

2.3.7 Wiring

Provide NEMA Class I, Type A. Wire out combination starter units to split type terminal blocks for easy removal of the starter unit without disturbing either factory or field installed wiring. Ensure all control terminal boards are accessible from the front.

All control wire is stranded tinned copper switchboard wire with 600-volt flame-retardant insulation Type SIS meeting UL 44 or Type MTW meeting UL 1063 , and passes the VW-1 flame tests included in those standards.

Hinge wire has Class K stranding. Current transformer secondary leads cannot be smaller than No. 10 AWG. The minimum size of control wire is No. 14 AWG. Power wiring for 480-volt circuits and below is of the same type as control wiring and the minimum size is No. 12 AWG. Give special attention to wiring and terminal arrangement on the terminal blocks to permit the individual conductors of each external cable to be terminated on adjacent terminal points.

2.4 COMPONENTS

Design each motor control center for operation on 480/277 -volts ac, 3-phase, 60-Hz system, and the ensure that equipment conforms to all the applicable requirements of NEMA ICS 1 , NEMA ICS 2 , NEMA ICS 4 , NEMA ICS 6 , UL 845 and NFPA 70 . List and label vertical sections and individual units under UL 845 where ever possible. In lieu of the UL listing, certification from any nationally recognized, adequately equipped, testing agency that the individual units and vertical sections have been tested and conform to the UL requirements of that agency will be acceptable when approved by the Contracting Officer. Provide NEMA Class I , Type B , motor control centers in accordance with NEMA ICS 2 .

SECTION 26 24 19.00 40 Page 11

2.4.1 Combination Starters

Where shown, p rovide full-voltage, non-reversing combination motor controller units containing molded-case circuit breakers, auxiliary and pilot devices and a magnetic contactor with thermal overload relays or reduced voltage starter where indicated on the drawings. Show the ratings of circuit breakers, contactors, motor controllers and other devices on the drawings. Ensure all combination motor controller units have short circuit ratings equal to 65,000 amperes or greater. Where control push-buttons, indicating lamps, "Hand-Off-Automatic" switches, and similar control devices are associated with a unit, mount them on the unit compartment door. Door-mounted components cannot interfere with access within the compartments. Molded case circuit breakers for use in combination starters meet the requirements of paragraph MOLDED CASE

CIRCUIT BREAKERS.

2.4.1.1 Magnetic Contactors

Provide magnetic contactors of the NEMA sizes as indicated on the drawings. The rating, performance and service characteristics conforms to the requirements of NEMA ICS 2 for contactors with continuous current ratings for the duty indicated. Rate motor control contactors for full-voltage starting (Class A controllers). Provide contactors suitable for at least 200,000 complete operations under rated load without more than routine maintenance. Minimize the interruption arc and flame by suitable arc chutes or other means so that no damage is done to other portions of the device. If provided, ensure the arc chutes are easily removable without removing or dismantling other parts. All current-carrying contact surfaces are silver-surfaced or of other approved material. Ensure the contactor operates without chatter or perceptible hum while energized. Provide coils suitable for continuous operation 120-volt ac circuits. Provide three-pole alternating-current contactors, except where otherwise noted, and insulated for 600 volts ac, electrically- operated, magnetically-held type. Direct-current contactors are two-pole, suitable for controlling circuits operating at 125 volts dc, insulated for 250 volts dc, electrically-operated, magnetically-held type and adequate for full-voltage motor starting service.

2.4.1.2 Reduced Voltage Starters

Provide an integrated unit with microprocessor logic board and door mounted digital display and keypad. Comply with UL 508 .

Rate autotransformers for heavy/severe duty and have taps according to NEMA ICS 2 . For thermal over load protection, ensure the autotransformer has normally closed thermostat wired in series with the normally closed thermal overload contact of the starter. Initial connection is to the 80 percent tap. Current transformers provide feedback signal to regulate torque during start up and to prevent overload conditions while motor is running. Provide the starter with a starting current of 300 percent of full load amps for thirty seconds, bypass/isolation contactor, and three phase thermal overload relay.

Provide manufacturer's standard front accessible keypad and digital display for programming the controller parameters, functions, and features. Include the following functions:

a. Adjusting motor full-load amperes, as a percentage of the controller's rating.

SECTION 26 24 19.00 40 Page 12

b. Adjusting current limitation on starting, as a percentage of the motor full-load current rating.

c. Adjusting linear acceleration and deceleration ramps, in seconds.

d. Setting initial torque, as a percentage of the nominal motor torque.

e. Adjusting torque limit, as a percentage of the nominal motor torque.

f. Adjusting maximum start time, in seconds.

g. Adjusting voltage boost, as a percentage of the nominal supply voltage.

h. Selecting stopping mode and adjusting parameters.

i. Selecting motor thermal-overload protection class between 5 and 30.

j. Activating and deactivating protection modes .

k. Selecting or activating communications modes.

Provide manufacturer's standard front accessible digital display for showing motor, controller, and fault status. Include the following displays at a minimum:

a. Controller Condition: Ready, starting, running, stopping.

b. Motor Condition: Amperes, voltage, power factor, power, and thermal state.

c. Fault Conditions: Controller thermal fault, motor overload alarm and trip, motor underload, overcurrent, shorted SCRs, line or phase loss, phase reversal, and line frequency over or under normal.

Provide integral controller diagnostics and protection to include:

a. Microprocessor-based thermal protection system for monitoring SCR and motor thermal characteristics, and providing controller overtemperature and motor overload alarm and trip; settings selectable via the keypad.

b. Protection from line-side reverse phasing; line-side and motor-side phase loss; motor jam, stall, and underload conditions; and line frequency excursions to over- or under-normal. Provide protection using input isolation contactor that opens when the controller diagnostics detect a faulted solid state component, or when the motor is stopped.

Provide the additional optional features:

a. Analog output for field-selectable assignment of motor operating characteristics; 4- to 20-mA dc.

b. Two additional field-assignable Form C contacts for alarm outputs.

c. Full-voltage/BYPASS selector switch. Ensure power contacts are totally enclosed, double break, made of silver-cadmium oxide, and assembled to allow inspection and replacement without disturbing line

SECTION 26 24 19.00 40 Page 13 or load wiring.

2.4.1.3 Auxiliary Contacts

Provide each controller with a minimum of three auxiliary contacts which can be easily changed from normally open to normally closed. Where indicated on the drawings, provide a fourth auxiliary contact and red and green indicating lights.

2.4.1.4 Overload Relays

Except as otherwise indicated, provide each controller with bi-metallic non-ambient compensated NEMA Class 20 thermal overload relays including external manual reset.

Provide bi-metallic relays with interchangeable heaters, calibrated for

1.0 and 1.15 service factor motors, electrically isolated normally open and normally closed contacts, visual trip indication, test trip feature operable without removing components or the motor starter. Overload to have (+/-) 24 percent adjustability, single-phase sensitivity, isolated alarm contact, and manual or automatic reset.

2.4.1.5 Individual Control Transformers

Where 120 volt ac control of contactors is indicated or required, provide an individual control transformer on the load side of the unit disconnect. Rate the control transformers 480-120 volts and conform to the requirements for control transformers in UL 506 . Verify control transformers have adequate volt-ampere capacity for the control functions indicated. Install transformers with Class J primary fuses. Except as otherwise indicated on the drawings, provide each control transformer with a fuse in one secondary lead and have the other secondary lead grounded.

2.4.1.6 Control Circuit Disconnects

Arrange motor control circuits to ensure that all sources of supply power are disconnected when the disconnecting means is in the open position in accordance with NFPA 70 . Where separate disconnecting means are provided, locate disconnects immediately adjacent to each other.

2.4.2 Wiring for Motor Control Centers

Provide wiring meeting the requirements of paragraph WIRING. Provide heavy-duty type terminals for terminating all power cables entering the control centers.

2.4.2.1 Contractor's Wiring

Form wiring into groups, suitably bound together, properly supported and run straight horizontally or vertically with no splices in the wiring.

The manufacturer's standard pressure-type wire terminations for connections to internal devices is acceptable. Add terminal blocks for wiring to devices having leads instead of terminals. Use ring tongue indented terminals on all wires terminated on control terminal blocks for external or interpanel connections and at shipping splits. Provide stud terminals with contact nuts and either locking nuts or lockwashers.

SECTION 26 24 19.00 40 Page 14

2.4.2.2 External Connections

Power and control cables enter the control centers at the bottom top or as shown on the drawings.

2.4.2.3 Terminal Blocks

In no case, the terminals provided for circuit breakers or contactors accommodate less than the number or size of conductors shown on the drawings. Give special attention to wiring and terminal arrangement on the terminal blocks to permit the individual conductors of each external cable to be terminated on adjacent terminal points.

2.4.3 Control Power

Provide control power for motor control centers using an integrated control power transformer. Mount control power transformers for several starter units in a separate compartment and connect its primary windings to the main bus through a molded case circuit breaker of suitable rating.

Rate the control power transformers 480-120 volts and conform to the requirements for control power transformers in UL 506 . Provide control power transformers with adequate volt-ampere capacity for the control functions indicated and an additional 10 percent capacity. Install control power transformers without primary fuses. Except as otherwise indicated, provide each unit compartment a fuse for control power in one secondary lead and have the other secondary lead grounded.

2.4.4 Accessories and Control Devices

Provide control accessories, and are suitable for mounting on the front of, or inside, the control centers as indicated on the drawings. Control accessories to meet the applicable requirements of NEMA ICS 2 . Mount relays and other equipment so that mechanical vibration does not cause false operation.

2.4.4.1 Control Stations

Ensure push-button stations and selector switches conform to NEMA ICS 2 , are of the heavy-duty, oil-tight type, rated 600 volts ac, and have a contact rating designation of A600. Provide switches with escutcheon plates clearly marked to show operating positions. Provide sufficient contact blocks to make up the electrically separate contacts required for lead-lag selector switches, emergency shutoff, or other control functions as shown on the drawings.

2.4.4.2 LED Indicating Lights

Furnish red and green LED's where shown on the drawings, indicating contact "open" and "closed" position. The LED's are accessible and replaceable from the front of the control center through a finished opening in the compartment door. The LED assemblies are the heavy duty oiltight, watertight, and dusttight type.

2.4.4.3 Control Relays

Control relays are the electrically operated, magnetically held, self-reset, open type, suitable for mounting inside the starter compartments, 120-volt ac. Contacts are as indicated on the drawings and have a contact rating designation of A600 or N600, as required, in

SECTION 26 24 19.00 40 Page 15 accordance with NEMA ICS 2 .

2.4.4.4 Timing Relays

Provide pneumatic type timers, suitable for mounting inside the control center and rated 120 volts ac, 60 Hz. Provide instantaneous and time delay contacts as indicated on the drawings, and have a contact rating designation of A600 or N600, as required, in accordance with NEMA ICS 2 .

Provide means for manual adjustment over a range as indicated on the drawings.

2.4.4.5 Alternators

Alternators 120-volt, 60 Hz, single-phase, open type, suitable for mounting inside of control center as indicated. Alternators to automatically cycle two motor starters in such a manner that No. 1 will lead and No. 2 will lag during the first cycle, and during the second cycle No. 2 will lead and No. 1 will lag, and the third cycle repeats the first cycle. The duration of a cycle is determined by an external device .

Provide contacts with a minimum contact rating designation of A600 or N600, as required, in accordance with NEMA ICS 2 .

2.4.4.6 Elapsed-Time Meters

Provide nonreset type hour-indicating time meters with 6- digit registers with counter numbers at least 1/4-inch high. White numbers on black backgrounds provide hour indication with the last digit in contrasting colors to indicate tenths of an hour. Provide an enclosure 3-1/2 inches square and dust resistant. Operating voltage is 120 volts ac.

2.4.5 Feeder Tap Units

Provide feeder tap units as indicated on the drawings. Feeder tap units include externally operable molded-case circuit breakers in combination motor-control unit enclosures for the protection of non-motor loads or remotely located magnetic motor-controllers. Contain not more than two molded-case circuit breakers in feeder tap units.

2.4.6 Metering Section

Provide metering section with instruments as indicated on the drawings.

2.4.6.1 Instrument Transformers

Comply with the interference requirements listed below, measured in accordance with IEEE C63.2 and IEEE C63.4 for instrument transformers.

2.4.6.1.1 Current Transformers (CT)

Provide current transformers conforming to IEEE C57.13 for installation in metal-clad switchgear. Use standard multi-ratio 5A secondary transformers. Ensure CTs are coordinated to the rating of the associated switchgear, relays, and instruments and CTs for relaying have a thermal rating factor of 2.0.

Provide wound type transformers.

Provide transformers that have single secondary winding.

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Provide transformers that are complete with secondary short-circuiting device.

Provide indoor dry type construction for window type transformers with secondary current ratings as indicated with specified burden, frequency, and accuracy.

2.4.6.1.2 Potential Transformers

Provide potential transformers conforming to IEEE C57.13 for installation in metal-clad switchgear. Use standard 120-volt secondary, drawout type, 60 Hz transformers with voltage ratings and ratios coordinated to the ratings of the associated switchgear, relays, and instruments. Ensure potential transformers are equipped with two current limiting fuses in the primary sized as recommended by the potential transformer manufacturer.

Provide transformers with tapped secondary.

Provide burden, frequency, and accuracy as required.

Provide indoor dry type two-winding construction for disconnecting potential transformers with integral fuse mountings and current-limiting fuses with primary and secondary voltage ratings as required.

2.4.7 Power-Factor-Correction Capacitors

Provide three-phase, delta-connected capacitors for power factor improvement rated 480 volts, 60 Hz. Capacitors have KVAR capacity as shown on the drawings , or as recommended by the pump/motor manufacturer and supplier. Provide capacitors for pumps shown with contactors used to switch the capacitors into the active starting circuit only while motor is running. If size permits, mount the capacitors in an adjacent compartment, or otherwise mount separately and connect to the motor at the motor terminal box. For reduced voltage starters, separately switch the capacitors with a time-delayed contactor rated according to NEMA ICS 2 for capacitor switching.

2.5 TESTS, INSPECTIONS, AND VERIFICATIONS

Submit, within a minimum of 14 days prior to the proposed date of tests, six copies of manufacturer's routine factory test procedures and production line tests for all motor control centers.

Each item of equipment supplied under this contract is given the manufacturer's routine factory tests and tests as specified below, to insure successful operation of all parts of the assemblies. All tests required herein is witnessed by the Contracting Officer unless waived in writing, and no equipment shipped until it has been approved for shipment by the Contracting Officer. Notify the Contracting Officer a minimum of 14 days prior to the proposed date of the tests so that arrangements can be made for the Contracting Officer to be present at the tests. The factory test equipment and the test methods used conforms to the applicable NEMA Standards, and is subject to the approval of the Contracting Officer.

Reports of all witnessed tests are signed by witnessing representatives of the Contractor and Contracting Officer. Bear the cost of performing all tests and include in the prices bid in the schedule for equipment.

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2.5.1 Motor Control Centers Tests

2.5.1.1 Dielectric Tests

Completely assemble the motor control center and perform dielectric tests in accordance with NEMA ICS 1 .

2.5.1.2 Operational Tests

Check the correctness of operation of each air circuit breaker and magnetic contactor and of all control devices, accessories and indicating lamps. These checks are made at rated voltage with power supplies to the main buses. Check all magnetic contactors for proper operation with power at 90 percent of rated voltage.

2.5.1.3 Short Circuit Tests

If the unit is not UL labeled for the specified short circuit, design tests may be submitted demonstrating that satisfactory short-circuit tests, as specified in NEMA ICS 2 , have been made on a motor control center of similar type of construction and having the same available short circuit current at the motor terminals, including any motor contributions, as the motor control centers specified to be furnished under these specifications.

2.5.1.4 Test Results

Submit six complete reproducible copies of the factory inspection results and six complete reproducible copies of the factory test results in booklet form, including all plotted data curves, all test conditions, a listing of test equipment complete with calibration certifications, and all measurements taken. Contractor's and Contracting Officer's Representatives to sign and date report.

PART 3 EXECUTION

3.1 INSTALLATION

Complete assembly is electrically and mechanically connected and assembled from coordinated subassemblies shipped in complete sections from the manufacturer. Align, level and secure the installation to the supporting construction in accordance with the manufacturer's recommendations.

3.2 ACCEPTANCE TESTS

Perform all applicable inspections and electrical tests, including optional tests, in accordance with NETA ATS.

Engage a factory-authorized service representative to perform startup services. Verify complete system operation including all hardware, software and communication devices. Start units to confirm proper motor rotation and unit operation. Test and adjust controls and safeties.

Replace damaged and malfunctioning controls and equipment. Perform final equipment adjustments:

a. Set field-adjustable switches, auxiliary relays, time-delay relays, timers, and overload relay pickup and trip ranges.

b. Adjust overload relay settings for power factor correction capacitors

SECTION 26 24 19.00 40 Page 18 connected to the load side of the overload relays.

c. Adjust the trip settings of motor circuit protectors and thermal-magnetic circuit breakers with adjustable.

d. Set field-adjustable switches and program microprocessors for required start and stop sequences in reduced-voltage, solid state controllers.

Final acceptance depends upon the satisfactory performance of the motor-control centers under test. Do not energize the motor-control center until recorded test data have been approved by the Contracting Officer. Provide final test reports .

3.3 CLOSEOUT ACTIVITIES

Submit manufacturer's instructions for the motor control units and protective devices including special provisions required to install equipment components and system packages. Detail within special notices hazards and safety precautions.

Provide the warranty to the Contracting Officer.

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2.2.4 Painting

2.3.7 Wiring

2.4.7 Power-Factor-Correction Capacitors