SECTION 16480 LOW VOLTAGE MOTOR CONTROL $# NTS: This specification section requires careful review by the specifier. The specifier is required to modify the section according to the requirements of the project. Brackets indicate items to be checked, completed, edited, selected, or filled in. NTS notations and brackets should be removed in the final printing. #$ PART 1 -- GENERAL 1.1 A. B. THE REQUIREMENT The CONTRACTOR shall furnish and install all group-mounted and unit motor control as required for each motor furnished for installation all in accordance with the requirements of the Contract Documents. When motors furnished differ from the indicated, the CONTRACTOR shall, at no additional cost to the CITY, make the necessary adjustments to wiring, conduit, disconnect devices, motor starters, branch circuit protection, and other affected material or equipment to accommodate the motors actually installed. Make like items of equipment provided hereunder the end products of one manufacturer in order to achieve standardization for appearance, operation, maintenance, spare parts, and manufacturer's service. RELATED WORK SPECIFIED ELSEWHERE The work of the following Divisions or Sections applies to the work of this Section. Other Sections of the Specifications, not referenced below, shall also apply to the extent required for proper performance of this work. 1. 2. 3. 4. 5. 6. 1.3 Section [16010] Electrical General Provisions. Section [16030] Electrical Test. Section [16050] Basic Materials and Methods. Section [16400] Electrical Service and Distribution. Section [16800] Electric Motors Section [11030] Variable Speed Drives, General C. 1.2 A. REFERENCE SPECIFICATIONS, CODES, AND STANDARDS [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-1 A. All work specified herein shall conform to or exceed the applicable requirements of the referenced portions of the following publications to the extent that the provisions thereof are not in conflict with other provisions of these specifications. 1. Codes and Standards: City of Los Angeles Electrical Code, latest adopted edition Title 8, Industrial Relations, Subchapter 5, Orders. LAEC California Code of Regulations Electrical Safety 2. Commercial Standards: UL 845 Standard for Safety Electric Motor Control Centers. General Standard for NEMA ICS-1 Industrial Control and Systems NEMS and Assemblies 1.4 A. B. CONTRACTOR SUBMITTALS ICS-2 Industrial Control Devices, Controllers Shop drawing submittals shall comply with the "Contractor Submittals" paragraph of Section [16010], "Electrical General Provisions". Final submittal shall include spare parts lists, catalog data for various motor control elements in addition to the submittals required by Section [16010] "Electrical General Provisions". The following submittals and specific information shall be provided. 1. 2. 3. 4. 5. 6. 7. 8. 9. [One-line diagrams,] [Elementary diagrams,] [Connection diagrams,] [Interconnection diagrams,] [Protective device time-current characteristics on conventional-sized transparencies,] [Operational description,] [Installation instructions,] [Maintenance instructions,] [Spare parts list,] C. 10. [Test reports,] including procedures, test conditions, results and graphs.] 1.5 QUALITY ASSURANCE [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-2 A. B. C. Quality assurance shall be in accordance with Section 16010 Electrical General Provisions. Electrical and Mechanical Testing: All components shall be factory tested in accordance with the applicable NEMA ICS requirements. Field Testing: Field tests shall be performed in accordance with Section 16030 Electrical Tests. PART 2 -- PRODUCTS 2.1 A. B. MOTOR CONTROL, GENERAL Provide each motor with a suitable controller and devices that will function as specified for the respective motors and meeting NEMA ICS 2, the NEC, and UL. Provide each motor controller with thermal overload protection in all ungrounded phases. Use protection consisting of thermal overload relays meeting NEMA ICS 2 which are sensitive to motor current and mounted within the motor controller, or a combination of thermal protectors embedded within the motor windings and controller-mounted overload relays, as indicated. Use overload protection devices of the inverse-time current characteristic type. Provide controller-mounted overload relays of the manual-reset type with externally operated reset button when used without motor thermal protectors; when used in conjunction with thermal protectors, provide the automatic reset type. Select and install overload relay heaters after the actual nameplate full-load current rating of the motor has been determined. If power factor correction capacitors are connected on the load side of the overload relays, incorporate the resulting reduction in line current in the selection of overload relay heaters. Install and connect any required thermal protector monitoring relay provided by motor manufacturer in motor-control circuit and provide manual reset function MANUALLY OPERATED STARTERS, FRACTIONAL HORSEPOWER Provide starters meeting NEMA ICS 2 with the enclosures shown, rated 1 hp at single-phase, ac voltages of 115 and 230 volts, and with thermal overload protection, and toggle or pushbutton operation. Provide for locking in the OFF position. MANUALLY OPERATED STARTERS, INTEGRAL HORSEPOWER Provide starters meeting NEMA ICS 2 of the horsepower rating, voltage, number of phases, and enclosure shown and with thermal overload protection, and pushbutton or toggle switch operation. Provide for locking in the OFF position. Provide running overcurrent protection. FULL VOLTAGE MAGNETIC STARTERS C. D. E. 2.2 A. 2.3 A. 2.4 [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-3 A. Provide starters meeting NEMA ICS 2, Class A, with the rating and enclosure shown. Starters shall be full voltage, non-reversing horsepower rated, providing combined protection against running and stalled overloads. Thermal overload relays on all phases shall be temperature compensated bimetallic type with manual reset and inherent single phasing prevention. REDUCED VOLTAGE STARTERS Provide starters meeting NEMA ICS 2, Class A, with the rating and enclosure shown. Starters shall be single-step magnetic [autotransformer] [part-winding] [wyedelta] type, having closed circuit transition and an adjustable time interval between application of starting and running conditions to the motors. [Provide autotransformers suitable for medium-duty service as specified in NEMA ICS 2, and with overtemperature protection. Provide taps giving approximately 50 percent, 65 percent, and 80 percent of line voltage at output terminals.] TWO-SPEED MOTOR STARTERS [If Applicable] Provide starters meeting NEMA ICS 2, Class A, suitable for [two-speed, twowinding] [two-speed, single-winding] [four-speed, two-winding], [variable torque] [constant torque] [constant hp] motors. CONTROL POWER TRANSFORMERS Supply individual control power transformers unless noted otherwise. The transformers shall have sufficient capacity to serve the connected load and limit voltage regulation to 10 percent during contact or pickup. Fuse one side of the secondary winding and ground the other side. Provide primary, current limiting fuses where fuses shown on Drawings, or where required by applicable codes and standards. MOTOR CONTROL CENTERS Provide motor control centers and components meeting the requirements of the latest revised NEMA and UL standards and the following requirements, unless otherwise indicated: RATING Voltage Short Circuit Rating shown] As indicated on the Drawings [22,000] [42,000] amps rms symmetrical [as 2.5 A. 2.6 A. 2.7 A. 2.8 A. $# NTS: Class 1, Type B, motor control center construction will normally be suitable for most applications. On large projects that have numerous external circuits leaving the motor control center that can be combined into control cables, consider specifying Class 2, Type B, and using a separate terminal compartment in each motor control center lineup to terminate the control [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-4 cables. #$ NEMA Class Class [1,] [2,] [3,] Type [A] [B] [C] [with all remote control and signal circuits wired to a separate terminal board compartment in each motor control center lineup;] [all additions and revisions shall be included in the final as-built record drawings] ENCLOSURE Type shown] Vertical Section Dimensions Finish 90-inches high, 20-inches wide [as shown] [13-inches nominal depth] [20-inches deep] [depth as shown] Exterior: manufacturer's standard gray over a primer and rust inhibitor or as per architectural standard; Interior: white lacquer or enamel Sheet steel reinforced with channel or angle irons, section constructed so they may be butted flush, end-to-end against a similar section without bolts, nuts, or cover plates causing interference; removable top cover plates [and bottom cover plates] Removable formed steel channel sills and removable lifting angles Full width, top and bottom, accessible from front Full height, isolated from unit Compartment starters with a separate door, accessible from front NEMA [Type 1] [Type 1 gasketed] [Type 12][as Construction Section Mounting Horizontal Wiring Compartments Vertical Wiring $# NTS: The following paragraph should be deleted unless you have specified Type C wiring or called specifically for master control terminal boards with Type B wiring. #$ Terminal Board Terminal board compartment at: Compartment [Unit space indicated] [Bottom] [Top] with [10 percent] [20 percent] [ ] spare terminals Individual compartments separated by steel Unit Compartment [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-5 barriers for each starter, feeder, or other unit capable of being wired from front without unit removal Compartment Doors Door Interlocking Separate hinged doors for each starter, feeder, or other unit Individual Starter and feeder doors mechanically interlocked so doors cannot be opened with unit energized; defeater mechanism to allow intentional access at any time; provisions for padlocking external disconnect handles in the OFF position Main circuits enter from [top;] [bottom;] control and feeder circuits enter from [top] [and] [bottom] Pull box with flanged connection for incoming busway, bus connection to motor control center main power bus and cable connection to ground bus [and neutral bus;] match dimensions of incoming busway; [Belleville washers on all bus connection bolts] Cable Entrance Busway Entrance BUS Horizontal Power Bus 3-phase [tin-plated,] [fully-insulated,] [copper] bus entire width of control center rated [600A,] [1200A,] [as indicated,] constructed to allow future extension of additional sections; pressure type solderless lugs for each incoming line cable; Belleville washers on all bus connection bolts. 3-phase [tin-plated,] [copper bus full height of section rated 300 amps minimum;] "sandwich" type bus insulation that provides dead front construction with starter units removed except for bus stab openings; Belleville washers on all bus connection bolts None [50 percent neutral] [100 percent neutral] [tin-plated;] [Copper;] Belleville washers on all bus connection bolts Copper, [tin-plated,] 400A minimum capacity; Belleville washers on all bus connection bolts [22,000] [42,000] amps rms symmetrical. Vertical Power Bus Neutral Bus Ground Bus Bus Bracing MOTOR STARTER UNITS General Individual including components and control devices pushbuttons, selector switches, [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-6 indicating lights, control relays, time delay relays, and elapsed time meters as specified in Section [16050], "Basic Materials and Methods". Construction Drawout combination type with stab connections, except where size and weight of equipment make this impracticable; readily interchangeable with starters of similar size; provide pull-apart unit control wiring terminal boards [on all draw-out units] [on all units] NEMA standard rating, NEMA Size 1; minimum meeting requirements specified under article 2.1, MOTOR CONTROL, GENERAL; [As indicated;] disconnecting device lockable in OPEN position Molded case motor circuit protectors with manufacturer's recommended trip setting for maximum motor protection, tripping indicated by operating handle position; interrupting capacity required for connection to system with short circuit capacity indicated; [shunt trip for ground fault protection;] [copies of circuit breaker time-current characteristics] Heavy-duty (HD), motor rated, load-break, quickmake, quick-break type meeting requirements of UL and NEMA KS 1; current- limiting fuses as specified with rejection clips Starters Disconnecting Device Circuit Breakers Fused Switches Two-Speed Motor starters Suitable for [two-speed, two-winding,] [twospeed, single-winding,] [four-speed, twowinding,] [variable torque] [constant torque] [constant hp] motors; as indicated, suitable for motor being controlled Load Detector Relays Motor Overload Manual reset with adjustable differential; Relays Cutler-Hammer Type D60LA, [ ], or equal Temperature compensated, three-pole, Protection [bimetallic thermal overload relay]; [solder dashpot overload relay]; manual-reset overload relays [ ;] [when used independently of other overload protection;] [automatic-reset when used with integral motor thermal protector] Manual-reset interposing Protection Interface relay for connection to motor-mounted thermal protector system Same as under FEEDER UNITS Protection AND MAIN PROTECTIVE DEVICE, except instantaneous operation device Special terminals to allow easy connection of Motor Thermal Ground Fault Capacitor Connection [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-7 power factor correction capacitors on the source side of starter overload relays on all starters where capacitor connection is shown CONTROL UNITS Disconnecting Device Disconnecting device capable of de-energizing all circuits in the unit. Provide a warning sign giving location of disconnecting device if not located in the unit. As indicated on the Drawings and as specified in Section [16050], "Basic Materials and Methods". Control Devices Permanent sleeve type markers to be applied to all wires. Wire Markers Control Wiring Minimum wire size 14 AWG copper FEEDER UNITS AND MAIN PROTECTIVE DEVICE Construction Same as under MOTOR STARTER UNITS [UL service entrance label on main protective device] Unless otherwise indicated, molded case with thermal-magnetic trip and interrupting capacity required for connection to system with short circuit capacity indicated; tripping indicated by operating handle position; suitable for use with 75 degrees C wire at full NEC 75 degrees C ampacity; [shunt trip [for ground fault protection] [and] [phase monitoring relay];] [for main [and feeder] protective devices, use molded case circuit breakers with ambient insensitive solid state trips and having the current sensors and solid state logic circuits integral in the circuit breaker frame; use solid state current control providing adjustable ampere setting, adjustable long-time delay, adjustable short-time trip and delay band, fixed instantaneous trip set at 15 times the current sensor rating and adjustable ground fault trip and delay band; make settings behind a sealable tamper-proof transparent cover; locate a trip button on the front cover of the circuit breakers to permit mechanical simulation overcurrent tripping for test purposes and to trip the breaker quickly in an emergency situation;] [copies of circuit breaker time-current characteristics] Heavy-duty (HD) motor rated, load-break, quickmake, quick-break type meeting requirements of UL and NEMA KS 1; suitable for use with 75 degrees C wire at full NEC 75 degrees C ampacity; current-limiting fuses as specified [with rejection clips] Circuit Breakers Fused Switches [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-8 Ground Fault Suitable for 480-volt, 3-phase, [three-wire,] [Protection four-wire,] solidly grounded wye system; consisting of ground sensors encircling all phase conductors and neutral conductor where used and connected to ground relays with adjustable pickup settings and time-current characteristics indicated; circuit breaker shunt trip and relay operating from a fused 120-volt ac control source within the control center; ground fault system ITE Ground Shield, General Electric Ground Break, or equal; copies of relay timecurrent characteristics [Manufacturer's standard] interlocking where indicated [Kirk] [ ] key Key Interlocking $# NTS: Use the following paragraph if added protection for phase sequence and phase unbalance is required. #$ Phase Monitoring 3-phase monitoring relay to protect Motor against low Relay voltage, voltage unbalance, and phase reversal; Furnas Class 47, [ ], or equal INSTRUMENTS Voltmeter Scale indicated, [switchboard class with 250degree scale, GE AB-40, or equal,] [panel type, nominal 4-1/2-inch model] with [ON/OFF single-phase] [3-phase OFF, fourposition] [phase-to-phase, phase-to-ground, OFF, seven-position] selector switch Scale indicated, [switchboard class with 250degree scale, GE AB-40, or equal,] [panel type, nominal 4-1/2-inch model] with [ON/OFF single-phase] [3-phase OFF, fourposition] selector switch, C.T.'s with ratio indicated Ammeter $# NTS: Use ground detection lights on ungrounded systems only. #$ Ground Detection Lights NAMEPLATES Heavy-duty oiltight type with operation explanation nameplate Engraved with inscription as shown on the single-line diagram, laminated plastic nameplates for each motor control center and [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-9 each unit, blank nameplates on spaces for future units Nameplates that are white and engraved to a black core; attach nameplates with stainless steel panhead screws $# NTS: Use the following paragraph for all motor control centers that are located in unheated indoor areas and in all outdoor areas. #$ SPACE HEATERS Thermostatically controlled space heater in the bottom of each vertical section for operation from an external 120V power source $# NTS: Be certain any of the following diagrams specified correctly correspond to NEMA standard diagrams for the NEMA class of wiring specified for the control centers. #$ DIAGRAMS Schematic (elementary) and outline diagrams, equipment schedules, wireless unit connection diagrams, [interconnection diagrams] $# NTS: Square D can conform to Specification except for the circuit breaker indicating a tripped position. #$ 2.9 A. ACCEPTABLE MANUFACTURERS [General Electric] [Allen Bradley] B. C. D. E. F. [Cutler-Hammer] [Square D] [Furnas] [Siemans] Or equal. [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-10 PART 3 -- EXECUTION 3.1 A. 3.2 A. GENERAL Perform work in a workmanlike manner with craftsmen skilled in the particular trade. Provide work presenting a neat and finished appearance. INSTALLATION Install equipment in strict accordance with submittal drawings and manufacturer's recommendations. Install motor control centers in accordance with NEMA ICS 2.3 as a minimum. Secure motor control centers using approved means as per latest standards and regulations. Grout mounting channels provided with motor control into the floor or mounting pads. $# NTS: Use the following on large projects with many motor control center sections. #$ B. Provide a qualified, factory-trained representative to supervise installation, final adjustment, and initial energization of this equipment. Make this representative available for as long as his services are required, but in any case for a period of [ ] days minimum. At the end of installation and adjustment, provide certification signed by this representative that the equipment has been properly installed and tested, and is ready for energization. Retighten to NEMA standards all current-carrying bolted connections and all support framing and panels. Field adjust the trip settings of all motor starter magnetic trip only circuit breakers. Adjust as per manufacturer' recommendations. Determine motor rated current s from motor nameplate following installation. In the selection of overload relay heaters, allow for motor current reduction where power factor correction capacitors are installed on the load side of the overload heaters. Prepare a typed tabulation of motor name, motor horsepower, nameplate full load current, measured load current, heater catalog number, protective device, trip setting, and include copy in the Technical Manual. Attach to the tabulation a copy of the starter manufacturer's overload heater selection tables, including only the tables for the particular starters provided. After the equipment is installed, touch up any scratches, marks, etc., incurred during shipment or installation of equipment. If required by the ENGINEER because of undue amount of scratches, repaint the entire assembly. FIELD TESTS C. D. E. 3.3 A. Field tests shall be in accordance with Section 16030 Electrical Tests. [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480- ****** [10/10/96] [ WASTEWATER MASTER SPECIFICATION] [PROJECT TITLE] LOW VOLTAGE MOTOR CONTROL 16480-12