AC Induction Motors Installation, Operation and Maintenance Manual
Contents
1. 8 UL360 UL440 18 12 4 499 and lower L180 L440 48 36 12 UL360 UL440 24 18 6 1 Maximum speed occupying more than 30 of operating time 2 For Tandem drives increase frequency of lubrication by multiplying values by 0 8 Lubrication Frames L180 L440 These motors are designed to route new grease directly into the bearing The relubrication periods shown in Table H are offered as a guide for varying service conditions speeds bearing types and operating hours Important Certain special motors may have a lubrication instruction plate permanently attached These specific lubricating instruction must be followed Lubrication Procedure ATTENTION If relubrication is done while motor is running stay clear of rotating parts Failure to observe this precaution could result in personal injury 1 Relubrication with the shaft stationary and a warm motor is recommended If lubrication must be done with the motor running stay clear of rotating parts and electrical circuits 2 Locate the grease inlet at the top of the bearing hub clean the area and replace the 1 8 inch pipe plug with a grease fitting if the motor is not equipped with a grease fitting Remove grease drain plug located opposite the grease inlet Using a manual grease gun pump in the recommended grease in the amount shown in Table F This amount of grease will provide an ample supply of lubricant between lubrication periods as determined from2. Table H for the service condition listed in Table G 18 AC Induction Motors Use Chevron SRI 2 grease or equivalent unless motor nameplate specifies special grease Use only clean fresh grease from clean containers and handle carefully to keep it clean In general mixing of greases is not recommended If an incompatible grease is used the lube system must be repacked completely with the new grease 5 Wipe away any excess grease at the grease drain or relief and replace drain plugs Repacking Bearings or Greasing New Bearings When existing bearings have been completely cleaned of old grease or when bearings are replaced use this procedure for packing the bearing 1 Apply one bead of grease around the inboard side of the bearing between bearing and inner cap Assure that grease adheres to balls or rollers 2 Apply one bead of grease around outboard side of bearing making sure grease adheres to balls or rollers Completely fill grease inlet and outlet passage holes with grease Fill outboard bearing cavity 60 to 90 full of grease If possible rotate shaft of assembled machine at least three revolutions by hand to distribute grease within bearings before starting motor Bearings Bearing housing designs provide protection to windings and interior of machine by minimum grease leakage They also provide good protection against external contamination Various types of anti friction bearings are used in the wide ra
3. UL360 and UL440 requires the use of roller bearings Coupled duty uses ball bearings Axial Float Motors have a wave spring washer between the drive end bracket and bearing The opposite drive end bearing is positioned axially by a float restricting inner cap Axial float including bearing internal clearance should be within the limits listed below The L440 frame spring is located on the opposite drive end Axial Float Frame Maximum Minimum L180 L440 1 29 mm 0 051 in 0 33 mm 0 013 in Anti Friction Bearing Assemblies The bearings are positioned and secured in a machined cavity in the end brackets Open type ball bearings are used for direct coupled and belt drive applications for frames L180 L320 employ ball bearings at both ends and are protected by inner caps at both ends Frames UL360 UL400 and UL440 employ a cylindrical roller bearing on the drive end for belt drives and a ball bearing for coupled service 20 AC Induction Motors Stub Shaft Removal Procedure Bearing Replacement Remove bearing by means of bearing puller Clean bearing housing and bearing seat prior to assembly of bearing Place new bearing in a bake oven for 1 2 hour at 121 degrees C 250 degrees F Place bearing onto shaft and push home to bearing shoulder Hold it in place for a minimum of 30 seconds After bearing has cooled down for about 1 minute add 1 2 cu in of fresh grease into back of bearing Once motor is assem
4. and Radial on page 13 Frames L280 L320 may be supplied with roller bearings for belt duty applications Frames L360 L440 are supplied with larger shafts and roller bearings when belted drives are specified Preferred V Belt Drives Sheave Centerline is Toward Motor from End of Shaft where gt Vv d Minimum pitch diameter of V belt sheave in inches or gt m X millimeters x hp Rated horsepower at base speed kw Rated kilowatts at base speed x Axial distance of the sheave centerline from the end of the shaft in inches or millimeters The distance is measured from the end of the shaft x is negative if centerline is beyond the end of the shaft and positive if toward the motor The formula should not be used for negative values of x greater than one half of the V dimension of the shaft extension AC Induction Motors 13 Table C Constants for Calculating the Minimum Sheave Diameters for V Belt Drives ay Base RPM Frame Units Dimension Constant 850 1150 1750 2500 L210 inches 3 50 A 40 6 30 0 19 77 14 63 B 7 26 5 43 3 56 2 09 millimeters 88 9 Cc 1384 1022 674 499 D 9 73 7 28 4 77 2 80 L250 inches 4 00 A 23 33 18 25 12 67 9 47 B 3 58 2 3 1 17 0 57 millimeters 101 6 C 795 622 432 323 D 4 80 3 08 1 57 0 76 L280 inches 4 50 A 20 28 16 17 11 2 8 32 B 2 94 1 75 0 84 0 43 millimeters 114 3 Cc 691 551 382 284 D 3 94
5. and or shields to protect against accidental contact with motor surface Failure to observe this precaution may result in personal injury Balance Motors are dynamically balanced to commercial limits unless ordered differently Balance is done with a full length 1 2 height shaft key A full shaft key is shipped with the motor Sheave or coupling should be balanced with a 1 2 height shaft key Standard Dynamic Balance Limits Highest Rated Speed Maximum Amplitude RPM Inches 3 000 4 000 0 0010 1 500 2 999 0 0015 1 000 1 499 0 0020 Up to 999 0 0025 16 AC Induction Motors Maintenance ATTENTION Internal parts of this motor may be at line potential even when it is not rotating Before performing any maintenance which could result in contacting any internal part be sure to disconnect all power from the motor Failure to observe this precaution could result in severe personal injury or death A Amount of grease to be added to motors is shown in Table F See Table H for relubrication interval Use Chevron SRI 2 or equivalent grease unless motor nameplate specifies special grease Table F Coupled Belted or Tandem Duty Grease Amounts Volume Weight Frame Cubic Inches Cubic Centimeters Ounces Grams L180 L280 1 0 16 0 5 14 L320 L400 2 0 32 1 0 28 L440 3 0 48 1 5 42 Using the table below determine service condition on the basis of the most severe operating pa
6. for your equipment can be ordered from your Allen Bradley Sales Office Be sure to include complete nameplate data serial number model number rating etc for your equipment when ordering the spare parts list 22 AC Induction Motors Parts Identification Drawing Total Service Programs N Z 4 Totally Enclosed Blower Cooled yp PLA Link gg N H 0 4 4 4 4 y WE a Item No Part Description Frame stator Rotor Bracket B E Bracket F E Shaft Ball Bearing B E Inner Cap B E CO N OD AA IN Ball Bearing F E Inner Cap F E Wave Washer B E Blower Motor Cover Blower Item No Part Description 13 Grill Blower 14 Eyebolt 15 Conduit Box Main Motor 16 Grease Fitting B E 17 Grease Fitting F E 18 Key Shaft Extension 19 Feedback Device When Supplied 20 Connector Feedback Device 21 Coupling Feedback Device 22 Mounting Adapter Feedback Device 23 Blower Motor Conduit Box Allen Bradley can provide a wide range of maintenance programs to help you reduce downtime improve productivity and increase profits Capabilities include e Motor Start up Service Motor Electrical and Mechanical Preventive Maintenance e Vibration Analysis e Mobile Van Repair Service e Balancing and Alignment Service e Maintenance Service e 24 Hour Technical Su
7. life ATTENTION This equipment is at line voltage when AC power is connected Disconnect and lockout all ungrounded conductors of the power line Failure to observe these precautions could result in personal injury and or loss of life Bypass Mode If the motor is to be used in bypass mode the user must select a motor starter and overcurrent protection suitable for this motor and its application Consult motor starter application data as well as the National Electric Code and or other applicable local codes Contact Allen Bradley to determine suitability of motor for specific applications in bypass mode Power Wiring Single Voltage Motors On Single voltage three lead motors connect leads marked U T1 V T2 W T3 to the appropriate drive output terminals Refer to the Drive User Manual for further information Dual Voltage Motors Be sure the motor leads are connected properly for the desired Low or High voltage connection per the motor connection diagram see below Refer to the Drive User Manual for proper drive output connections 3 PHASE DUAL VOLTAGE LOW VOLTAGE HIGH VOLTAGE re y THERWOsTaT J Is Li 3 PHASE SINGLE VOLTAGE P1_ THERMOSTAT P2_ LEADS Um vie E W3 3 Wig sik AC Induction Motors Direction of Rotation These motors are capable of bi directional shaft rotation When voltages in an A B C phase sequence are applied to leads U T1 V T2 W T3 clockwise shaft rot
8. 0 411 80 497 80 567 80 L360 pounds 875 1075 1350 1525 830 293 1020 293 1300 293 1475 293 kilograms 397 488 612 692 376 133 463 133 590 133 669 133 L400 pounds 1350 1630 2000 2250 1470 352 1820 352 2210 352 2475 352 kilograms 612 740 908 1021 667 160 826 160 1003 160 1123 160 L440 pounds 1300 1550 1800 2050 1365 1085 1600 1085 1865 1085 2080 1085 kilograms 590 703 816 930 619 492 726 492 846 492 943 492 1 Thrust capacity for vertical mounting includes a constant whose value is plus or minus depending on the direction of the thrust load The constant is plus for thrust loads acting upward against the force of gravity and minus for loads acting downward with gravity 14 Operation AC Induction Motors Table E ATTENTION The use of these radial load capacities requires the accurate calculation of the radial load for the application Radial loads for gears sprockets and flywheel are usually accurately determined but the radial loads due to V belt drives are subject to miscalculations because they do not include all of the pre tension load belt tightening The calculations of the radial load for a V belt drive must include the pre tension for transmitting the horsepower pre tension for centrifugal force on the belts pre tension for high start torques rapid acceleration or deceleration pre tension for drives with short arc of contact between the V belt and sheave and low coefficient o
9. 2 35 1 13 0 58 L320 inches 5 00 A 18 47 14 25 9 97 B 2 00 1 24 0 59 millimeters 127 0 Cc 630 486 340 D 2 68 1 66 0 79 UL360 inches 6 25 A 10 42 8 08 5 89 B 0 46 0 25 0 13 millimeters 158 8 Cc 355 275 201 D 0 62 0 34 0 17 UL400 inches 8 00 A 8 9 6 9 4 8 B 0 30 0 23 0 16 millimeters 203 2 Cc 303 235 163 D 0 40 0 31 0 21 Shaft Loads Axial and Radial These motors are suitable for limited shaft loads as shown in Tables D and E Recommended maximum thrust loads depend on the mounting position either horizontal or vertical For recommendations for loads in excess of those shown contact Allen Bradley Table D Axial Thrust Capacity No Radial Load Horizontal Mounting Vertical Mounting Frame Units 2500RPM 1750RPM 1150 RPM_ 850 RPM 2500 RPM 1750 RPM 1150 RPM 850 RPM L180 pounds 430 500 600 675 430 60 500 60 600 60 675 62 kilograms 195 227 272 306 198 27 227 27 272 27 306 27 L210 pounds 477 551 662 742 498 61 564 61 676 61 756 61 kilograms 217 251 301 338 227 28 257 28 308 28 344 28 L250 pounds 509 600 722 828 541 86 629 86 755 86 865 86 kilograms 231 272 327 376 245 39 285 39 342 39 392 39 L280 pounds 590 700 850 975 644 122 754 122 905 122 1038 122 kilograms 268 318 386 442 292 56 342 56 411 56 471 56 L320 pounds 705 835 1020 1170 770 175 905 175 1095 175 1250 175 kilograms 320 379 463 531 349 8
10. B CONTROLMAITCHED Variable Speed Solutions Installation Operation and Maintenance Manual AC Induction Motors e Frames L180 L440 e Specifically designed for use with Adjustable Frequency AC Drives Rockwell Automation 2 AC Induction Motors General Description Table of Contents The motors described in this publication are high performance motors specifically designed for use with adjustable frequency drives The basic design includes Class H insulation 1 0 service factor 40 degree C ambient continuous duty Standard enclosures are totally enclosed blower cooled totally enclosed fan cooled non ventilated and drip proof force ventilated Modifications and accessories are available Important These motors are equipped with metric hardware A ATTENTION Only qualified electrical personnel familiar with the construction and operation of this equipment and the hazards involved should install adjust operate and or service this motor Read and understand this manual in its entirety before proceeding Failure to observe this precaution could result in personal injury or loss of life General Description Receiving and Handling c0eeeeeeueeeee eee 3 Installation Location scat a de bakin e eae igi eee 4 Drain PUGS ccsipyett peed Peedlo seid ein aA 5 Power Supply cos betes Sete Ge aig eae Dee eee 5 Conduit BOX a vii tuovs tetas intis wet A aA 5 Mounting west xia ae a E Me Nati
11. Torque Recommended Torque Hole Diameter Bolt Size and SAE 5 SAE 8 Frame mm in Thread N m Ib ft N m Ib ft L180 11 2 0 44 3 8 16 45 50 33 37 64 72 47 53 L210 11 2 0 44 3 8 16 45 50 33 37 64 72 47 53 L250 14 2 0 56 1 2 13 113 126 83 93 159 179 117 132 L280 14 2 0 56 1 2 13 113 126 83 93 159 179 117 132 L320 17 5 0 69 5 8 11 210 239 155 176 271 338 200 249 L360 20 6 0 81 3 4 10 372 420 274 310 527 597 389 440 L400 26 9 1 06 7 8 9 588 659 434 486 835 934 616 689 Belted Drive Motor slide bases or rails when used must be securely anchored to the foundation with the proper bolts Important The motor shaft and load shaft must be parallel and the sheaves aligned Refer to Motor Application Data on page 11 AC Induction Motors Coupled Drive Motors will operate successfully mounted on the floor wall or ceiling and with the shaft at any angle from horizontal to vertical Special mountings duty or thrust demands may however require a different bearing system ATTENTION Motor C face is intended for mounting auxiliary equipment such as pumps and gears When mounted horizontally C face motors should be supported by the feet and not by the C face Installations requiring horizontally mounted motor frames L280C and L440 must be supported by the feet as well as C face or D flange Failure to observe these precautions can result in damaged equipment and or personal injur
12. al codes The ground connection should be a solid and permanent metallic connection between the ground point the motor terminal housing and the motor frame A ground lead is provided inside the terminal box Due to the need to carry higher frequency ground currents from switch voltage waveforms the ground connection path must be low impedance low resistance Such ground currents exist during normal operation on inverter power Drive L180 L320 frame motors are supplied with a shaft suitable for a belt or coupled drive Belt loads should be checked against maximum allowable radial loads under Shaft Loads Axial and Radial on page 13 Contact Allen Bradley to determine L440 frame belt load requirements Frames L360S and L400S are suitable for coupled duty only larger shafts are supplied for belted duty 10 AC Induction Motors of motor rotation before coupling motor to load ATTENTION Ensure that all guards are properly installed before proceeding Exercise extreme care to avoid contacting rotating parts Failure to observe these precautions could result in personal injury ATTENTION Incorrect motor rotation may cause personal injury or damage the equipment Check direction Proper alignment is a key step for long life of bearings shafts and belts and minimum downtime Misalignment can cause excessive vibration and damaging forces on shaft and bearings For direct coupled drives flexible couplings facilitat
13. ation facing the opposite drive end will result If shaft rotation is incorrect change the direction of rotation as follows the motor leads after drive power has been removed Verify that the drive is incapable of delivering hazardous voltages and that the voltage at the motor leads is zero before proceeding Failure to observe this precaution could result in personal injury and or death A ATTENTION The drive may apply hazardous voltages to 1 Turn off and lockout all power to the motor Verify that the voltage at the motor leads is zero 2 Reverse any two of the three motor power leads Thermostat Leads Thermal Protector As a standard feature these motors have three 3 normally closed thermostats one per phase connected in series with leads P1 amp P2 and terminated in the main conduit box To protect against motor overheating thermostats must be connected to the appropriate drive circuit function loss Failure to connect the thermostats will void the motor warranty Follow the Drive User Manual for correct thermostat lead connections Blower Motor Motors which are blower cooled incorporate an independently powered three phase AC blower motor to assure continuous cooling air flow regardless of motor speed ATTENTION The blower motor is typically wired to the AC input of the drive and will be energized even when the drive is not running Remove and lockout the main power supply before touching blower comp
14. bled grease bearings per instructions found herein Bracket Re Assembly To obtain proper planity between the integral mounting feet on the front and back end brackets of L210 L440 frame motors a smooth level surface should be used to align the brackets when they are assembled to the frame Check for proper shaft alignment after reinstalling the motor Drive in Stub Shaft 1 Turn off and lockout power to the motor 2 Remove in line blower motor and cover assembly by removing the hex head cap screws on cover if enclosure is TEAO Blower cooled 3 After removal of blower assembly obtain the stub shaft puller backplate and assemble over the stub shaft against the end of the motor shaft 4 Obtain the stub shaft puller plate available from Rockwell Automation and assemble over the stub shaft and up against the puller backplate Important Note 7 16 inch set screws must be backed out enough to clear the stub shaft O D 1 2 inch jack screws should be backed out to allow puller plate to fit up flush against the backplate 5 Screw the 7 16 inch set screws in on each side of the puller plate until they contact the stub shaft Keep the stub shaft reasonably centered between the jack screws Tighten screws securely 6 Using a 3 8 inch allen wrench turn the jack screws in equal amounts in a clockwise manner to remove the stub shaft If the set screws slip retighten and repeat process 7 Replace blower motor and cover assembl
15. e alignment For belt drives the sheave must be placed as close as possible to the motor bracket Shipping Blocks Motors supplied with roller bearings at the drive end are shipped with wooden blocking to prevent axial movement of the shaft during shipment Remove the blocking and bolts securing it and discard Make sure motor shafts turn freely If motor is to be reshipped blocking of bearing is required Encoder Connection Diagrams Dynapar H20 10 pin M S Connector o Output Terminations 90 45 ies Berd Signal Pin Output A A Output B B Output A Output Z C Output B Common F Case G lt gt 360 180 No Connection E J Output A NOT H Index Output B NOT I Output Z NOT J Output waveform CCW Rotation of Shaft Lakeshore Epic Connector or Plain Cable The following table is a universal wiring guide for the latching Epic connector or plain cable Wires that are not used should be left not connected never connect to power or common For optimum EMI noise immunity connect the encoder shield pin 10 or braid to the cable shield The encoder shield is internally isolated from the encoder frame The cable shield should still be connected to ground at the receiving end This encoder has a line driver output A pull up resistor is not required Motor Application Data AC Induction Motors 11 Epic Connector or Plain Cable Connections Pin S
16. f friction between belt and sheave caused by moisture oil or dust Failure to observe these precautions could result in damage to or destruction of the equipment Radial Load Capacity No Axial Load2 Radial Load Capacities at the End of the Shaft in kg Ibs Frame 2500 RPM 1750 RPM 1150 RPM 850 RPM L180 202 445 202 445 202 445 202 445 L210 397 875 397 875 397 875 397 875 L250 623 1375 692 1525 692 1525 692 1525 L280 703 1550 796 1755 796 1755 796 1755 L320 764 1685 816 1800 816 1800 816 1800 UL3601 1157 2550 1304 2875 1497 3300 1501 3310 UL4001 1644 3625 1855 4090 2132 4700 2354 5190 1 Data for motors with roller bearings at the drive end back end Motors with ball bearings at the drive end are for coupled duty only 2 Contact Allen Bradley to determine L440 frame belt load requirements Motor Start Up A ATTENTION Before initial start up observe the following precautions e Remove all unused shaft keys and loose rotating parts to prevent them from flying off Replace covers and protective devices e When the motor is supplied as part of drive system refer to the Drive User Manual for operating instructions Tachometer feedback must be properly connected for closed loop operation Reverse polarities or broken connections can cause dangerous overspeeds Failure to observe these precautions could result in personal injury or dea
17. iate notation on your freight bill or express receipt If any concealed loss or damage is discovered later notify your freight or express agent at once and request him to make an inspection We are willing to assist you in collecting claims for loss or damage in shipment however this willingness on our part does not remove the transportation company s responsibility in reimbursing you for collection of claims or replacement of material Claims for loss or damage in shipment must not be deducted from the invoice nor should payment of the invoice be withheld awaiting adjustment of such claims as the carrier guarantees safe delivery If considerable damage has been incurred and the situation is urgent contact the nearest Allen Bradley Sales Office for assistance Please keep a written record of all such communications Handling ATTENTION Eyebolt s or lifting lug s are intended for lifting the motor only with the standard accessories such as tachometer brakes etc mounted by Allen Bradley The lifting means on the motor must not be used to lift the unit plus additional equipment Failure to observe this precaution could result in personal injury ATTENTION Eyebolts may unscrew during lifting Verify that eyebolts are tight and secure from turning or lift the unit on a sling or platform Failure to observe this precaution could result in personal injury In all cases care should be taken to assure lifting in the direction in
18. ignal Color Pin Signal Color 1 Common Black 6 5 15V Red 2 B Green 7 B NOT Yellow 3 A Blue 8 A NOT Gray 4 Z Violet 9 Z NOT Orange 5 No Connection 10 Shield Braid Maximum Safe Speed ATTENTION The machinery builder and or user are responsible for assuring that all drive train mechanisms the driven machine and process material are capable of safe operation at the maximum speed at which the machine will operate Failure to observe these precautions could result in personal injury The speeds given in Table B are the maximum mechanically safe operating speeds for frames with standard construction These speeds must not be exceeded under any condition Motor control must hold the maximum speed under any load condition including no load within the maximum safe speed Drive systems whose design characteristics inherently prevent the AC motor from exceeding the motor maximum safe operating speed must prevent the motor from exceeding the maximum safe speed if a single component failure should occur Table B Maximum Safe Speed Frame Diameter Maximum Safe Speed L180 7200 RPM L210 5000 RPM L250 5000 RPM L280 5000 RPM L320 4000 RPM L360 3750 RPM L400 3750 RPM L440 2700 RPM With special construction maximum safe speed may differ from the above values In all cases the maximum safe speed is indicated on the motor nameplate Important Normal operating speeds must be limited
19. llation and Use Of Electric Motors And Generators published by the National Electrical Manufacturers Association NEMA publication MG 2 1983 ANSI C51 5 It is recommended that this publication be referred to whenever you select or install any AC motor The application of motors and other electrical equipment in hazardous locations is restricted by the National Electric Code Users must observe these regulations and consult with local code inspection and enforcement agencies to insure compliance Location Locate the machine where the ambient temperature is not over 40 degrees C 104 degrees F and where clean air has free access to ventilating intake and outlet openings Except for machines with a suitable protective enclosure the location should be clean and dry Important The cooling system on standard totally enclosed blower cooled motors requires clean air to be forced through ducts which are integral to the stator frame It is important that these air passages be kept clean and that sufficient clearance be provided on the blower motor air inlets and stator duct outlets for unrestricted flow of air For Drip Proof Force Ventilated Enclosures sufficient clearance must be provided on all inlet and outlet openings to provide for unrestricted flow of air Separately ventilated motors with exhaust to ambient pipe in only must have at least 152 4 mm 6 in of clearance between the opening and adjacent walls or floor Important Mo
20. nge of frames as needed to meet specific load speed and service requirements Most commonly used bearings are e Single row open ball bearings for coupled and belted duty for frames L180 L320 e Single row open ball bearings for coupled duty for frames L360 and L400 e Cylindrical roller bearings at drive end for belted duty on frames UL360 and UL400 Disassembly and Reassembly Instructions AC Induction Motors 19 Frequent bearing checks are recommended If temperatures become excessive investigate immediately for the cause Total bearing temperatures should not exceed 121 degrees C 250 degrees F Causes for high bearing temperature are e Contaminated grease e Insufficient grease or excessive amount e Incorrect grease e Excessive load or thrust due to misalignment or motor overload e Loose bearings e Bearing failure e Excessive ambient temperature Replacement bearings should be ordered from Rockwell Automation in order to obtain the same carefully selected bearing as the original Bearings should never be exposed by disassembly of the motor unless absolutely necessary for inspection or replacement of the bearing or maintenance in other parts of the machine Protect good bearings from dirt and contamination at all times Most bearing failures are caused by dirt The open ball bearings for motor frames L180 L320 are the same regardless of whether application is coupled or belted Belted duty for frames
21. o Ee 5 Stub Shaft Installation Procedure 000 6 Comece a E E E E TE 7 GROUNOING 424 EE E A E 9 DIVE Sae k aiae anaE aE A ithe AEE E 9 Encoder Connection Diagrams sasse 10 Motor Application Data Maximum Safe Speed n annau 11 Minimum V Belt Sheave Diameters 12 Shaft Extension and Method of Drive 12 Shaft Loads Axial and Radial 0 05 13 Operation Motor Start Up sche acter Stee oe trae eee 14 Balancen rerea ve std tution ark aed ao bares 15 Maintenance Lubrication Frames L180 L400 17 Repacking Bearings or Greasing New Bearings 18 Disassembly and Reassembly Instructions Axial Flats cs Bk E See tk UE tae Nat ode EL ce 19 Anti Friction Bearing Assemblies 05 19 Bearing Replacement 00 e eee e eee 20 Bracket Re Assembly 00 e cece eeees 20 Stub Shaft Removal Procedure 0e 00 20 Replacement Bearings Spare Parts 0055 21 Parts Identification Drawing 0 cece ee ee eee 22 Total Service ProgramS 0cceee seen eee ees 22 AC Induction Motors 3 Receiving and Handling Acceptance Thoroughly inspect this equipment before accepting shipment from the transportation company If any of the goods called for in the bill of lading or express receipt are damaged or the quantity is short do not accept them until the freight or express agent makes an appropr
22. onents Failure to observe this precaution could result in personal injury and or death Blower motor fuse protection kits are required for blower motor overload protection The specific blower motor will vary depending on frame size and enclosure Follow the connection diagram supplied with the blower motor which in general will be one of the following AC Induction Motors 9 T6 Delta Star Delta Star T4 T5 T6 T4 T5 w2 U2 v2 Wwe o_o U2 V2 e _e _ F F i Ti T2 T3 iS U1 Vi Wt or L1 L2 L3 nt 2 L3 L1 L2 L3 i in i Low Volts Line High Volts Low Volts Line High Volts U1 Black V1 Blue W1 Brown U2 Green V2 White W2 Yellow or Connection Diagram shown on page 7 Procedure 1 Connect for low or high voltage as shown 2 Check that the direction of air flow is in agreement with the direction of air flow arrows mounted on the motor If directional flow is incorrect interchange power leads to T1 amp T2 or U1 amp V1 Grounding ATTENTION Connect an appropriate equipment grounding conductor to the drive ground terminal motor frame transformer enclosure if used drive electrical enclosure and an appropriate grounding electrode Failure to observe these precautions could result in personal injury and or death The user is responsible for assuring that the grounding method is in accordance with the National Electric Code and the applicable loc
23. pport e Modernization Service For more information contact your local Allen Bradley Sales Office Notes AC Induction Motors 23 Online Documentation The latest motor information can be obtained from the Allen Bradley Drives amp Motors home page on the World Wide Web at http Awww controlmatched com www rockwellautomation com Power Control and Information Solutions Headquarters Americas Rockwell Automation 1201 South Second Street Milwaukee WI 53204 2496 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Europe Middle East Africa Rockwell Automation Vorstlaan Boulevard du Souverain 36 1170 Brussels Belgium Tel 32 2 663 0600 Fax 32 2 663 0640 Asia Pacific Rockwell Automation Level 14 Core F Cyberport 3 100 Cyberport Road Hong Kong Tel 852 2887 4788 Fax 852 2508 1846 Publication 1329L UM001A EN P July 2001 Supersedes 1329L 5 0 dated March 2000 Copyright 2001 Rockwell Automation All rights reserved Printed in USA
24. rameter i e temperature bearing load atmosphere or operating hours per day Table G Service Condition Service Operating Condition Ambient Temperature Bearing Load Atmosphere Hours Day Standard 18 to 40 degrees C Steady Clean 8 0 to 104 degrees F Severe 30 to 50 degrees C Medium Shock Vibration Medium Dirt 8 to 24 22 to 122 degrees F 1 less than 0 2 in sec Abrasives Corrosion Extreme 54 to 65 degrees C Heavy Shock Vibration Heavy Dirt 8 to 24 65 to 149 degrees F 1 more than 0 44 in sec Abrasives Corrosion 1 Motors must be specially designed for operation in ambient outside the range of 25 to 40 degrees C 13 to 104 degrees F Special grease is required 2 EXTREME service conditions are rare in actual practice Corresponding lubrication cycles should therefore be applied with caution In addition itis advisable to check with Allen Bradley for related special instructions AC Induction Motors 17 Table H Relubrication Periods Frames L180 L440 Relubrication Interval Months Maximum Normal Standard Severe Extreme Operating Speed RPM Frame Service Service Service 3450 and higher All 9 4 1 2400 3449 L180 L250 24 9 3 L280 L440 9 3 1 1700 2399 L180 L320 36 12 3 L360 L440 18 6 2 UL360 UL440 9 3 1 800 1699 L180 L320 36 24 8 L360 L440 36 12 3 UL360 UL440 9 6 1 500 799 L180 L320 48 36 12 L360 L440 36 24
25. tended in the design of the lifting means Lift using all lugs provided Likewise precautions should be taken to prevent hazardous overloads due to deceleration acceleration or shock forces Angle of lift with rope or chain must be greater than 45 degrees from horizontal For unusual conditions such as side wall and ceiling mounting of horizontal motors or installation of vertical motors shipped in a horizontal position special precautions must be taken It is recommended that an experienced rigger be employed Installation AC Induction Motors Storage Motors must be stored in a clean dry area protected from extremes of temperature moisture shock and vibration Storage temperatures of 10 to 49 degrees C 50 to 120 degrees F with a maximum relative humidity of 60 must be observed In addition motors subjected to extended storage must be handled and treated per the requirements specified in publication Motors 5 0 This publication is available from your Allen Bradley Sales Office or online at http www controlmatched com All drains to be fully operable while in storage and or the drain plugs removed The motors must be stored so that the drain is at the lowest point All breathers and automatic T drains must be operable to allow breathing at points other than through the bearing fits Allen Bradley AC motors are designed and built in accordance with Safety Standard for Construction and Guide for Selection Insta
26. th AC Induction Motors 15 In addition to observing the above precaution all precautions Attentions mentioned previously in this document should be observed e Stop and remove power from the motor per the Drive User Manual directions e Verify that the DC bus voltage is zero per the Drive User Manual e The interior of the motor should be clean and dry e Connections must be tight e The driven machine should be unloaded if possible Important Machines designed for cooling by a separate source of forced ventilation must not be operated without the air supply Be sure blower is running in proper direction While operating the motor observe the performance It should run smoothly with little noise The bearings should not overheat and should reach a leveling off temperature Any undue noise overheating or erratic performance should be investigated and necessary corrective action taken immediately to prevent serious damage Before attempting any repairs please contact your Allen Bradley Sales Office All motors are lubricated before shipment and will operate for a long period before regreasing is required The period will vary depending on environmental and service conditions Refer to Maintenance on page 16 ATTENTION Surface temperature of the motor enclosure may reach temperatures which can cause discomfort or injury to personnel coming into contact with hot surfaces The user must apply appropriate guards
27. to those listed in order to meet nameplate rating and assure validity of warranty 12 AC Induction Motors Minimum V Belt Sheave Diameters Application of Pulleys Sheaves Sprockets and Gears on Motor Shafts To avoid excessive bearing loads and shaft stresses belts should not be tightened more than necessary to transmit the rated torque The pre tensioning of the V belt drive should be based on the total tightening force required to transmit the horsepower divided by the number of belts This procedure avoids the excessive load caused by tightening individual belts to a prescribed level recommended by belt manufacturers Mounting In general the closer pulleys sheaves sprockets or gears are mounted to the bearing on the motor shaft the less will be the load on the bearing This will give greater assurance of trouble free service The center point of the belt or system of V belts must not be beyond the end of the motor shaft The inner edge of the sheave or pulley rim should not be closer to the bearing than the shoulder on the shaft but should be as close to this point as possible The outer edge of a chain sprocket or gear must not extend beyond the end of the standard motor shaft Shaft Extension and Method of Drive Frames L180 L250 are supplied with a shaft and bearing system suitable for either coupled or belted drives Belt loads should be checked against maximum allowable radial loads under Shaft Loads Axial
28. tors located in a damp moist environment must have space heaters to protect against condensation when motor is not operating AC Induction Motors 5 Drain Plugs If motor is totally enclosed it is recommended that condensation drain plugs be removed These are located in the lower portion of the end shields not included on L180 frames Totally enclosed XT motors are equipped with automatic drains which should be left in place as received Power Supply This is an adjustable speed motor designed for operation with adjustable frequency drives Verify that the motor nameplate data corresponds to the drive output rating and follow the Drive User Manual for motor installation and connection Conduit Box The standard conduit box location for totally enclosed motors is top mounted for F1 F2 versatility without motor disassembly For drip proof force ventilated F1 is standard Conduit box can be rotated in 90 degree increments for lead outlet at front back or sides On L180 frame motors the conduit box is mounted on the top for all enclosure types Mounting Motors must be mounted on a rigid solid base or foundation Poor base construction may cause resonances in the motor base assembly which can result in bearing failure and other motor damage All hold down bolts must be the correct grade for the type of mounting and must be torqued to their recommended value Table A Recommended
29. y Stub Shaft Installation Procedure Screw in Stub Shaft 1 Turn off and lockout power to the motor 2 Remove in line blower motor and cover assembly by removing the hex head cap screws on the cover if enclosure is TEAO Blower cooled Important An extended blower cover is required when a feedback device is installed Contact Allen Bradley for assistance with an in line blower 3 Check the motor shaft center hole for chips dirt or other residue and clean as required Obtain the stub shaft to be screwed into the motor shaft Apply an even coat of Loctite Number 271 or equivalent to the stub shaft thread Place stub shaft in motor shaft threaded hole and hand tighten 6 Using a spanner wrench on the motor shaft drive end or alternate means of locking motor shaft torque the stub shaft to 27 N m 20 Ib ft 7 Using a dial indicator with 0 0005 inch graduations indicate the stub shaft to within 0 002 inch T I R When Inland tachometers are used the tachometer stub shafts must indicate to within 0 001 in T LR 8 Mount feedback device per manufacturer s instructions AC Induction Motors 7 Connections ATTENTION The user is responsible for conforming with the National Electrical Code and all other applicable local codes Wiring practices grounding disconnects and overcurrent protection are of particular importance Failure to observe these precautions could result in severe bodily injury or loss of
30. y if TEAO blower cooled with the correct extended blower cover using the hex head cap screws previously removed Replacement Bearings Spare Parts AC Induction Motors 21 Screw in Stub Shaft 1 Turn off and lockout power to the motor 2 Remove in line blower motor and cover assembly by removing the hex head cap screws on cover if enclosure is TEAO Blower cooled 3 After removal of blower assembly motor shaft will need to be locked from turning The use of a spanner wrench on motor drive shaft or alternate means can be used Place an open end wrench on stub shaft flats and turn counter clockwise right hand threads 4 Replace blower motor and cover assembly if TEAO blower cooled with the correct extended blower cover using the hex head cap screws previously removed Your maintenance program will not be complete without including spare bearings It must be remembered that the bearing is a wearable component and therefore must eventually be replaced To ensure that you are able to maintain original operation we recommend the purchase of spare parts directly from Rockwell Automation All bearings are subject to exact specifications and tests necessary to satisfy performance requirements In this manner it is possible to duplicate your present bearing Markings on the bearing do not indicate complete specifications A detailed parts list which gives Allen Bradley recommendations for spare parts that should be stocked
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