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Rotating Machines Specification Guide GFS-V3 LOW AND MEDIUM VOLTAGE AC MOTORS TEFC SEVERE DUTY AND WPI VERTICAL HOLLOW SHAFT (VHS) Energy $aver VHS Initial Release – 12/2014 Page 1 Rotating Machines Specification Guide GFS-V3 Table of Contents 1. General Requirements............................................................................................3 2. Electrical Requirements......................................................................................…4 3 Mechanical Requirements......................................................................................6 4. Data................................................................................................………................9 5. Warranty....................................................................................................……..…..9 Initial Release – 12/2014 Page 2 Rotating Machines Specification Guide GFS-V3 1. GENERAL REQUIREMENTS 1.1 Purpose The purpose of this specification is to help motor users specify world class Premium Efficient Vertical Hollow Shaft High Thrust motors for use in vertical turbine pump or other applications utilizing a hollow shaft motor mounted by a P Base. 1.2 Scope This specification covers continuous duty, horizontal, three phase, integral horsepower, totally enclosed and weather protected I, squirrel cage induction motors in NEMA frame sizes 2135013 for use either directly on the line or on single step PWM adjustable frequency drives on variable torque loads. 1.3 Service Conditions Unless otherwise specified, motors conforming to this specification shall be suitable for operation in accordance with their rating under the following conditions: a. b. c. d. 1.4 Ambient temperature -4°C to +40°C. Service Factor 1.15. Maximum altitude of 1000 meters (3300 feet) above sea level at 40°C ambient WP-I motors are intended for indoor or outdoor installations that are not considered severe. TEFC Severe Duty motors are intended for Severe Duty Applications such as high humidity, chemical laden (corrosive) or salty, non-ocean front, atmospheres. Standards NEMA motors shall be in accordance with NEMA standard MG 1, latest revision. Motors shall also comply with the applicable portions of the National Electric Code and the Canadian Standards Association (CSA) latest revisions. Initial Release – 12/2014 Page 3 Rotating Machines Specification Guide GFS-V3 2. ELECTRICAL REQUIREMENTS 2.1 Operating Characteristics With nameplate voltage and frequency applied, the motor performance shall be as follows: a. Torque: The locked rotor, breakdown, and pull-up torque shall meet the requirements of NEMA Design A or B of the latest version of NEMA MG-1. b. Current: The locked rotor current shall be below the limits for a motor starter of the appropriate rating of the motor. Motor shall also be capable of 20 second stall at six times full load current without injury to the motor components. c. Efficiency: Motors shall have a full load nominal efficiency that meets or exceeds the NEMA Premium Efficiency requirements. Motor efficiency shall be tested per IEEE 112 test method B, using accuracy improvements by segregated loss determination. d. Temperature Rise: The temperature rise shall be 80C or less at 1.0 service factor. 2.2 Stator and Rotor lamination Steel The lamination steel used shall be low loss silicon steel with a C5 coating. The stator and rotor slot designs shall be optimized. 2.3 Insulation System a. All motors shall use a UL listed Class F system or better. 213-449 frame motors shall use a trickle treat process to ensure no voids exist in the winding which virtually eliminates corona. (This process is vastly superior to a dip-and-bake process which traps air in pockets in the winding and does not penetrate into the stator slots.) 500 frame motors may use a Vacuum Pressure Impregnation (VPI) system. b. The insulation system shall be designed to meet a minimum resistance of 1.5 megohms after exposure in a humidity chamber at 10% humidity for 168hrs in a 40° C ambient. c. All motors shall be tested for partial discharge inception voltage to ensure the motors exceed NEMA MG1 Part 31. 2.4 Space Heaters Unless otherwise specified, motors shall have a 115V space heater to prevent condensation from forming on the windings. Initial Release – 12/2014 Page 4 Rotating Machines Specification Guide GFS-V3 2. ELECTRICAL REQUIREMENTS - continued 2.5 Thermostats 444-5013 motors shall have 3 class F normally closed trip thermostats wired in series. 2.6 Starting Single voltage motors shall be suitable for part winding starting. Initial Release – 12/2014 Page 5 Rotating Machines Specification Guide GFS-V3 3. MECHANICAL REQUIREMENTS 3.1 Stator Frames a. The horsepower to frame assignments for NEMA Motors shall conform to the latest revision of NEMA MG 1 standard for horizontal T frame motors. b. Frames shall be constructed of high strength Class 25 grey iron or better. c. All frames shall include cast-in lifting lugs unless cast-in lifting lugs are provided on the end shields. (Lifting lugs provide consistent and reliable lifting provisions. Eyebolts can be dangerous if not used properly. Cast-in lifting lugs add another dimension of safety). 3.2 Enclosure WP-I motors shall have a minimum IP rating of IP22. TEFC SD motors shall have a minimum IP rating of IP55. 3.3 Bearing System a. All motors shall have a minimum L10 bearing life of 8760 hours considering the thrust applied to the motor. b. All motors shall have a re-greasable bearing system or a refillable bearing system for oil-lubricated bearings. c. All machined surfaces of the bearing caps and end shield shall be close running fits. d. On grease-lubricated bearings, grease entrance and exit cavities shall be precharged with Mobil Polyrex- EM™ premium grease to eliminate potential for condensation entering the grease cavity. e. End shields shall be provided with grease fittings and relief plugs extended to the outer periphery of the end shield to allow for re-greasing in service. f. The bearing system shall be locked to reduce endplay. Initial Release – 12/2014 Page 6 Rotating Machines Specification Guide GFS-V3 3. MECHANICAL REQUIREMENTS - continued 3.4 Vibration Vibration at rated voltage and frequency shall meet NEMA Grade B limits. 3.5 Shaft The shaft shall be constructed of 1045 carbon steel or better and shall be machined to meet NEMA or IEC specifications. 3.6 Endshields a. End shields shall be high strength class 25 grey iron or better. b. Condensation drains shall be provided in the lowest point of the lower end shield. c. Lifting lugs shall be provided on the end shields for 320 frame and larger motors. 3.7 External Cooling Fan All fans on TEFC motors shall be corrosion resistant, non-sparking material such as 30% glass filled polypropylene. 3.8 Conduit Box a. The conduit box shall be cast iron or fabricated steel. b. The box shall have a gasket between the conduit box and the motor frame which provides lead separation. c. A gasket shall also be provided between the machined surfaces of the conduit box and cover to provide a waterproof conduit box. d. Bolts securing the conduit box cover shall be on the outside of the box cavity. e. The conduit box shall meet or exceed the volumes as included in IEEE 841 with a threaded conduit hole. f. Grounding provision shall be provided in the conduit box. g. The conduit box shall be able to be rotated in 90-degree increments. h. The internal temperature of the terminal box shall allow use of 75C rated supply conductors for motors rated 600V and below and shall allow the use of 90C rated supply conductors for motors rated above 600V. 3.9 Shaft Grounding Ring 444-5013 frame motors used on a variable frequency drives that are used in a non-hazardous area shall have a shaft grounding ring. Initial Release – 12/2014 Page 7 Rotating Machines Specification Guide GFS-V3 3. MECHANICAL REQUIREMENTS (continued) 3.10 Nameplate a. The nameplate shall be 316 stainless steel. b. The nameplate shall also include the following information: Motor Type Frame Size Voltage Full Load Amps Horsepower (or KW) Full Load RPM Phases Frequency Time Rating 3.11 Enclosure Ambient –Max Insulation Class KVA Code NEMA Design NEMA Nom. Eff Service Factor Min Temp of Sup. Wires Vibration Limit Motor Weight Cat # (if applicable) Bearing DE Bearing ODE Power Factor Max KVAR IP Rating Bearing Lubrication External Hardware All screws and bolts shall be plated for added corrosion resistance. All bolts shall be flanged hex head and minimum of grade 5. Initial Release – 12/2014 Page 8 Rotating Machines Specification Guide GFS-V3 4. DATA 4.1 Tests Tests shall be performed on each design to assure compliance with NEMA MG 1 and IEEE Std 112 Method B. Each motor shall have a commercial test with results supplied in the motor conduit box. All motors shall be tested for partial discharge inception voltage to ensure the motors exceed NEMA MG1 Part 31. Data packs shall include outline drawing, connection diagram, installation manual, performance data, and a speed torque current curve. 5. WARRANTY 5.1 Warranty Motor mechanical components shall have a 24 month operational warranty and a 30 month from date of shipment warranty, whichever occurs first. Initial Release – 12/2014 Page 9