1、12-05M 16480-1 SECTION 16480 MOTOR CONTROL CENTERS SPEC WRITE NOTE: Delete between /_/ if not applicable to project. Also delete any other item or paragraph not applicable to the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION This section specifies the furnishing, complete ins
2、tallation, and connection of the motor control centers. 1.2 RELATED WORK A. Section 13081, SEISMIC RESTRAINT FOR NON-STRUCTURAL COMPONENTS: Seismic requirements for non-structural equipment. B. Section 16050, BASIC METHODS AND REQUIREMENTS (ELECTRICAL): General electrical requirements and items that
3、 is common to more than one section of Division 16. C. Section 16051, ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY.D. Section 16127, CABLES, LOW VOLTAGE (600 Volts and below): Cables and wiring. E. Section 16155, MOTOR STARTERS: Control and protection of motors. F. Section 16430, METERING, G. Section 1
4、6450, GROUNDING: Requirements for personnel safety and to provide a low impedance path for possible ground fault currents. 1.3 SUBMITTALS A. Submit in accordance with Section 16050, BASIC METHODS AND REQUIREMENTS (ELECTRICAL). B. Catalog Data: 1. Submit Catalog Data and information as required to de
5、monstrate that materials conform to the specification requirements. Data shall include features, characteristics, ratings and settings of all adjustable components. C. Shop Drawings: 1. Sufficient information, clearly presented, shall be included to determine compliance with drawings and specificati
6、ons. 2. Include electrical ratings, enclosure type, dimensions, weights, mounting details, front view, side view, equipment and device arrangement, running overcurrent protection, branch circuit overcurrent protection, wiring diagrams, materials, connection diagrams for each motor control center, an
7、d nameplate schedule. 3. For starters: a list of overload sizes for each motor, and / circuit breakers / fuse / sizes. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-05M 16480-2 D. Manuals: Two weeks prior to the final inspection, submit four cop
8、ies of the following to the Resident Engineer: 1. Complete maintenance, operating and testing manuals including wiring diagrams, technical data sheets, including load current, overload relay and settings of adjustable relays, and information for ordering replacement parts: a. Include complete “As In
9、stalled“ diagrams, which indicate all items of equipment and their interconnecting wiring. b. Include complete diagrams of the internal wiring for each of the items of equipment, including “As Installed“ revisions of the diagrams. c. The wiring diagrams shall identify the terminals to facilitate ins
10、tallation, maintenance, operation and testing. d. Instructions for testing and adjusting overcurrent protective devices. E. Certification: Two weeks prior to final inspection, submit four copies of the following to the / Resident Engineer / COTR /: SPEC WRITER NOTE: Refer to VA Handbook H-18-8 for S
11、eismic Design Requirements. Specify Region of Seismicity, based on location of the equipment so motor control center manufacturers can check/design seismic strength of their equipment. Delete the following paragraph if the motor control center(s) is located outside the seismic zone. 1. Certification
12、 from the manufacturer that the motor control center(s), accessories, and components will withstand the seismic forces and that the unit will be fully operational after the seismic event at the project site. 2. Certification by the manufacturer that the motor control centers conform to the requireme
13、nts of the drawings and specifications. 3. Certification by the Contractor that the motor control centers have been properly installed, adjusted, and tested. 1.4 APPLICABLE PUBLICATIONS A. Publications listed below (including amendments, addenda, revisions, supplements and errata) form a part of thi
14、s specification to the extent referenced. Publications are referenced in the text by the basic designation only. B. National Electrical Manufacturers Association (NEMA): ICS 1-05Industrial Control and Systems: General Requirements Provided by IHSNot for ResaleNo reproduction or networking permitted
15、without license from IHS-,-,-12-05M 16480-3 ICS 2-05Industrial Control and Systems: Controllers, Contactors, and Overhead Relays, Rated 600 volts ICS 6-01Industrial Control and Systems: Enclosures FU 1-02.Low-Voltage Cartridge Fuses 250-03Enclosures for Electrical Equipment (1000 Volts Maximum) C. N
16、ational Fire Protection Association (NFPA): 70-05.National Electrical Code (NEC) D. Underwriters Laboratories, Inc. (UL): 486A-04.Wire Connectors and Soldering Lugs for Use with Copper Conductors 845-04Motor Control Centers PART 2 - PRODUCTS 2.1 MOTOR CONTROL CENTERS A. Factory-assembled and wired m
17、otor control centers shall comply with NEC, NEMA, and UL, and as shown on the drawings. B. Motor control centers shall be complete, floor-mounted, dead-front metal-enclosed, free-standing, grounded, indoor type. C. Wiring: The motor control centers shall be NEMA Standard, Class / 1 / 2 /, Type / A /
18、 B / C /. SPEC WRITER NOTE: Larger projects will require a study as part of the construction contract requirements. The Engineer shall coordinate with the VA. D. Ratings: Ratings shall be not less than shown on the drawings. Interrupting ratings shall be not less than the maximum short circuit curre
19、nts available at motor control center location as shown on the drawings / or as calculated as part of the Section 16051, ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY./ E. Shall conform to the arrangements and details of the drawings and to the spaces designated for installation. F. Motor control center
20、s shall be able to withstand the mechanical stresses caused by rough handling during shipment in addition to the normal electrical and mechanical stresses, which will occur during operation of the centers. G. The components and the control wiring shall conform to the approved shop drawings as furnis
21、hed for the various applicable electrical and mechanical sections of the specifications. H. All Steel parts shall be factory phosphatized and painted with primer and baked enamel or lacquer finishes except for ground connections. The Provided by IHSNot for ResaleNo reproduction or networking permitt
22、ed without license from IHS-,-,-12-05M 16480-4 paint and finish shall withstand a minimum of 1000 hours salt spray test. I. Vertical Sections: 1. Approximately 2.25 m (90 inches) high, front and rear line-up, dead-front assembly and fabricated by a single manufacturer. Unit shall be designed to perm
23、it future additions or rearrangement of units. 2. Rugged steel assemblies with bracing, reinforcing gussets and jig-welding to assure rectangular-rigidity. The sections shall be completely metal-enclosed, including the base and capable of being bolted together to form a single assembly. 3. The struc
24、ture shall be NEMA Type rated (Type 1, Type 3R or Type 12) as indicated on the drawings or as required to suit the environment. 4. Spaces within the sections shall be suitable and adequately sized for starters and accessories as indicated on the drawings. 5. Mount the sections on adequate structural
25、 steel supports at the factory, front and rear, for the full length of each center. 6. Each space shall have an individual door with hinges and latches for present and future starters. 7. End panels shall be removable to facilitate future additions. 8. All section parts shall be accessible from fron
26、t for maintenance rearrangement. 9. Screws in the removable panels shall remain in the panels when the panels are removed. Self-aligning, self-retaining nuts, which are parts of the screw assembly, shall remain in tact. 10. The structure shall have a minimum 300 mm (12 inches) high wireway at the to
27、p of each section and a minimum 150 mm (6 inches) high wireway at the bottom of each section. The wireway shall run the full length of the structure. 11. Each section in the motor control center shall have isolated vertical full height wireways. Vertical wireways shall connect with both the top and
28、bottom horizontal wireways. 12. Each section in the motor control center shall be marked with maximum short circuit current rating. 13. Each vertical section for starters shall be equipped with all necessary hardware and busing for modular plug-in units to be added or moved around. All unused space
29、shall be covered by hinged doors and equipped to accept future units. 2.2 BUS BARS AND INTERCONNECTIONS A. Horizontal and vertical bus ratings as shown on drawings; bus bars shall be fully rated. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-05M
30、 16480-5 B. Bus shall be / silver-plated copper / tin plated copper / tin-plated aluminum / C. Bus bar joints and interconnection joints shall be plated, constant high-pressure type with high strength copper-silicon bolts, and nuts. Bellville type conical washers under the nuts and over plated flat
31、steel washers against the aluminum shall be used for aluminum bus. D. Vertical bus shall have insulation as follows: 1. High strength polyester glass or equal. 2. High track-resistance. 3. High impulse and dielectric strength, suitable for withstanding the maximum short circuit currents. 4. High fla
32、me-retardant, self-extinguishing. 5. Comply with NEMA Standard for 50 degree C (122 degrees F) temperature rise above the ambient temperature. E. Shall have horizontal main buses and vertical buses for connecting the motor starters, circuit breakers or switches. Buses shall be braced as indicated on
33、 the drawings. F. A ground bus shall be copper and shall extend across the entire length of the motor control center ground bus size as indicated on drawings. G. Shall include provisions to extend the motor control center. H. Provide shutter mechanism to isolate vertical bus when plug-in device is w
34、ithdrawn. I. Equip future spaces for motor controllers, circuit breakers and switches with all hardware required to accept the future equipment. SPEC WRITER NOTE: Show on drawings, a schedule of starters with accessories. Also coordinate with mechanical equipment. 2.3 STARTERS A. Product of the same
35、 manufacturer as the motor control centers. B. Factory tested, stab-on, draw-out type up through size 4. Size 5 and above require bolted connections. C. Shall conform to the requirements in Section 16155, “MOTOR STARTERS”. Include built-in red and green pilot lights. D. Interchangeable with starter
36、of the same ratings in all of the motor control centers being installed for this contract. Each motor starter shall be provided with a label indicating all of its ratings. E. Disconnecting devices shall be / circuit breaker / fused switch / motor circuit protector / type with external operating hand
37、le with lock-open padlocking positions and on-off position indicator: /1. Circuit Breakers: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-05M 16480-6 a. UL listed and labeled, in accordance with the NEC, as shown on the drawings and as specified
38、. b. Bolt-on thermal-magnetic type with a minimum interrupting rating as indicated on the drawings / or as required by the Power Study (Section 16051, ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY)./ c. Equipped with automatic, trip free, non-adjustable, inverse time, and instantaneous magnetic trips fo
39、r 100 amperes or less. The magnetic trips shall be adjustable from 3X to 10X for breakers greater than 100 ampere frames. Factory setting shall be HI, unless otherwise noted. d. Additional features shall be as follows: 1) A rugged, integral housing of molded insulating material. 2) Silver alloy cont
40、acts. 3) Arc quenchers and phase barriers for each pole. 4) Quick-make, quick-break, operating mechanisms. 5) A trip element for each pole, thermal magnetic type with long time delay and instantaneous characteristics, a common trip bar for all poles and a single operator. 6) Electrically and mechani
41、cally trip free. 7) An overload on one pole of a multi-pole breaker shall automatically cause all the poles of the breaker to open /. /2. Fused Switches: a. Quick-make, quick-break type in accordance with UL 98, NEMA KS 1 and NEC. b. Minimum duty rating, NEMA classification General Duty (GD) for 240
42、 volts and NEMA classification Heavy Duty (HD) for 480 volts. c. Horsepower rated and shall have the following features: 1) Copper blades, visible in the OFF position. 2) An arc chute for each pole. 3) Fuse holders for the sizes and types of fuses specified. / /3. Motor Circuit Protectors: a. UL lis
43、ted and labeled in accordance with the NEC, and as shown on the drawings. b. Bolt-on type with a minimum interrupting rating as indicated on the drawings or as required by the power study Section 16051, ELECTRICAL SYSTEM PROTECTIVE DEVICE STUDY. c. Equipped with automatic, adjustable magnetic trip.
44、Magnetic trip shall be adjustable up to 1300 percent of the motor full load amperes. Protectors shall include a transient override feature for Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-12-05M 16480-7 motor inrush current, and shall be equipped
45、with a push trip test button. / F. Doors for each space shall be interlocked to prevent their opening unless disconnect is open. Incorporate “defeater“ mechanism for inspection by qualified mechanic. G. Identify each motor controller, circuit breaker and switch with a separate nameplate of laminated
46、 black phenolic resin with white core and engraved lettering not less than 6 mm (1/4 inch) high. Identify each motor by its number or other designation, which indicates function fulfilled by the motor. Identify pilot light with ON and OFF designation. SPEC WRITER NOTE: If microprocessor based starte
47、rs are specified, remove references to other type starters in this section. /H. Each starter shall be furnished with unit-mounted microprocessor-based controls. The controls panel shall be powered by 120 volts. SPEC WRITER NOTE: Where solid-state equipment is provided, provide transient voltage surg
48、e protection. 1. Following shall display as a minimum on the control panel: a. Amperes in each phase. b. Controller status. c. Time and date. d. Operation settings. e. Running time. f. Trip data-cause of trip. 2. Control Functions: a. Overload trip settings. b. Trip class. c. Ground fault-trip level
49、 and time, if required. d. Phase imbalance. e. Frequency. f. Remote/local control. 3. Job Conditions: Shall be suitable to operate under 0 to 70 degrees C (32 to 160 degrees F) and 0 to 95 percent relative humidity. 4. Provide two 10-amp and 120-volt alarm contacts./ 2.4 FEEDER UNITS A. Circuit breaker: shall conform to the applicable portions of Section 16160, PANELBOARDS. B. Fusible
