SECTION MOTOR CONTROL CENTER

Transcription

1 SECTION MOTOR CONTROL CENTER PART 1 GENERAL 1.01 DESCRIPTION A. This section covers the contract item Motor Control Center (MCC). The contract item includes demolition and removal of existing MCC; and designing, manufacturing, furnishing, installing, testing, and delivering the new motor control center to the Knights Landing Outfall Gates work site. B. The MCC shall provide housing, power, protection, and control for equipment as shown RELATED SECTIONS A. Supplementary General Conditions, General Conditions, Division 1 sections, and Drawings apply to this section. This section may require direct correlation with the following sections of the contract: 1. Section Selective Demolition. 2. Section Materials and Workmanship. 3. Section Panel Work. 4. Section Electrical Testing Requirements. 5. Section Basic Electrical Materials and Methods. 6. Section Insulated Wire and Cable. 7. Section Panelboard. 8. Section Training Program REFERENCES A. The following publications form a part of this specification to the extent referenced. Application of these publications shall conform to Document Interpretation of the Contract, Paragraph 2: 1. NEMA ICS UL N-10

2 1.04 SUBMITTALS A. Submittal drawings and circuits shall implement and show start/stop operation of the motors and actuators. The push buttons and light indicators shall be shown with their intent in the circuit. The Contractor shall submit the following: 1. Product catalog data for equipment and components. 2. Working Drawings and Data: a. Outline and arrangement drawings. b. Front elevations. c. Single-line diagram. d. Compartment three-line diagrams. e. Wiring diagrams. f. Material lists. g. Factory test procedures. h. Operation and maintenance manuals. i. Instrumentation. j. Switches, push buttons, and indicating lights. k. Miscellaneous equipment and accessories including communications and control equipment. l. Bill of materials and descriptive data of equipment ratings and nameplates. 3. Certificates and Test Reports. 4. Manufacturer s standard coating system. PART 2 PRODUCTS 2.01 MANUFACTURER A. The motor control center shall be GE, Evolution series; Square D, Model 6 series; Cutler Hammer, Freeman series; or equal N-10

3 B. The last section (P1A5) of the MCC shall contain the MCC Electronic Enclosure and shall be 90 inches high by 20 inches wide by 24 inches deep. It shall have an adequate number of knockouts for ventilation required for the addition of the MCC Electronic Enclosure and the communications equipment. C. The power circuit breakers shall be Myers Power Products; GE, WavePro; ABB, Emax; Seimens, WL; Cutler-Hammer, Magnum DS; Square D, Masterpact; or equal. D. The listing of specific manufacturers above does not imply acceptance of their products that do not meet the specified ratings, features and functions. Manufacturers listed above are not relieved from meeting these specifications in their entirety. Products in compliance with the specification and manufactured by others not named will be considered only if pre-approved by the Engineer ten (10) days prior to bid date RATINGS A. The MCC shall be NEMA Class IIS and shall have the ratings listed below: Knights Landing Motor Control Center Ratings System voltage Frequency Connection Short circuit Bus bracing Main vertical bus Neutral bus Ground bus 240/120 volts, 3 phase 60 Hz 3 phase, 4 wire 25 ka symmetrical 25 ka 200 A 200 A 200 A B. Features and Options: 1. Buses shall be copper. 2. Insulated and isolated vertical bus. 3. Vertical ground and load ground buses. 4. Wiring shall be Type B D N-10

4 5. Wire shall be Type SIS. 6. Ring tongue terminals. 7. Wire markers. 8. Motor circuit protectors shall be 240 volts, 3 pole. They shall be lockable in the open position. C. MCC Enclosures: 1. Enclosures shall be indoor NEMA 1, gasketed, front access for mounting against a wall. 2. Seismic bracing. 3. Enclosures shall be formed from manufacturer s standard gage sheet steel. 4. Finish shall be the manufacturer s standard coating system as approved. 5. General: The enclosures for the MCC shall be rigid, selfsupporting, sheet steel enclosed, steel framed, dead front type, with hinged panels. The size of MCC cubicles shall not exceed the dimensions shown unless otherwise approved. The MCC line-up shall be located as shown in a room without access to the rear of the MCC cubicles. The MCC assembly shall be provided with a separate removable steel floor channel frame or other approved method designed for bolting the MCC to the floor. The MCC shall be bolted to the floor only and not to a wall. The Contractor shall design the MCC enclosure and anchoring system to meet seismic requirements in Paragraph 1.05 D. The Contractor shall provide necessary hardware to anchor switchgear and the frame. Ends of the channel frames and other openings shall be covered. 6. Sections: The MCC area in the existing Control Building shall accommodate the MCC as shown. However, the sections of MCC and supportive channel frame shall be designed and fabricated to be separable as necessary for transportation and installation purposes, and shall be bolted together to form one continuous unit. Terminal blocks required for reconnecting wires across the shipping splits shall be provided. Each removable switchgear section shall have removable lifting devices and shall be capable of being lifted by a crane. 7. The MCC shall be designed to replace the existing MCC as shown. The cubicle alignment with existing conduit locations is critical. Any N-10

5 deviation from this layout is subject to the Engineer s approval. The Contractor shall submit adequate information to the Engineer regarding any deviations. Terminal blocks required for reconnecting wires across the shipping splits shall be provided. Each removable MCC section shall have removable lifting devices and shall be capable of being lifted by a crane. The MCC shall also be capable of being lifted by a forklift or being jacked and pulled into position in the pump station. 8. Horizontal wireways shall be provided for the entire length of the switchgear. Vertical wireways shall be provided for each switchgear cubicle. The combined horizontal and vertical wireways shall have the capability to interconnect control wiring to any section within the lineup. In addition, the MCC lineup shall have the provision for top entry for field wiring. 9. Sheet Steel: Sheet steel forming the enclosures, doors, panels, and barriers shall be hot rolled, conforming to ASTM A 568. Frames shall not be less than AISC No. 11 gage. Panels and doors shall not be less than AISC No. 11 gage. Exterior panel surfaces shall be free from holes, seams, dents, weld marks, loose scale, or other defects, and shall not be drilled or welded for attachment of wiring, resistors, or other devices where such holes or fastenings will be visible from the exterior. 10. Doors: The doors and hinged panels shall have fully concealed hinges and stainless steel, heavy-duty three-point cabinet latches with padlocking provisions. The cabinet latches shall be Eberhard Manufacturing Co., 300 Series, Model 5655-SSX; Hansen, Model 70; or equal. Doors and hinged panels shall have heavyduty door stops to prevent doors from damaging equipment and closing until the stop is manually released. Doorstops, which require manual setting, will not be accepted. The edges of the doors and hinged panels shall be bent back a minimum of 1-1/4 inch and shall be welded at each corner. The doors and hinged panels shall not sag more than 1/16 inch when opened with equipment in place unless when the door is closed it is seated so that the weight of the door is supported by permanently attached structural members. Doors and hinged panels, which shall be lifted by the operator to open or close, will not be accepted. Maximum deflection or warping, when the components are mounted on panels, shall not exceed 1/16 inch as measured from one side to the other or from top to bottom, measured with the doors and panels open. 11. The final exterior MCC color shall be ANSI Z55.1, color chip No. 61, light gray N-10

6 2.03 ARRANGEMENTS A. Motor Control Center: 1. Incoming and Main Circuit Breaker: a. Incoming line termination section shall be 72 inches wide by 24 inches high by 24 inches deep as shown. b. Main circuit breaker shall be a 100 ampere low-voltage power circuit breaker. c. Last section of the MCC (P1A5) shall enclose communications, control, HMI and UPS equipment as shown SELECTOR SWITCHES AND PUSH BUTTONS A. Selector Switches, Push Buttons, and Indicating Lights: Selector switches, push buttons, and indicating lights shall be heavy duty and oil tight. Selector switches shall have legend plates furnished for each device. B. Contacts for selector switches shall be electrically isolated and independent. Selector switches shall have at least two spare contacts in each position. C. Indicating lights shall be transformer type when used in ac control. The color of the lenses shall be as specified. D. Selector switches and indicating lights shall be General Electric, Type CR2940; Westinghouse Electric Corp., Type PB1; or equal. PART 3 EXECUTION 3.01 DEMOLITION A. The Contractor shall remove and dispose of existing MCC enclosures and all wiring, equipment, and appurtenances within the Control Building. B. The Contractor shall take precautionary measures as related to Section Hazardous Waste Disposal. C. The Contractor shall take care to preserve existing conduits for future use. D. The Contractor shall take care to protect field wiring that may be reused N-10

7 3.02 PREPARATION A. Equipment shall be unpacked and inspected for any damage that may have occurred during shipping, handling, or storage. B. Exterior surfaces shall be cleaned and repaired as necessary and equipment moved to final location INSTALLATION A. Motor control centers shall be anchored to concrete floor conforming to Section Materials and Workmanship FIELD QUALITY CONTROL A. The Engineer will perform field tests with help by the Contractor as specified in Section Electrical Testing Requirements. PART 4 PAYMENT 4.01 PAYMENT A. The contract price will be paid for MOTOR CONTROL CENTER (MCC); which price shall include full compensation for all costs incurred under this section. END OF SECTION N-10