Installation, Operation and Maintenance Manual Standard Industrial AC Induction Motors • 180-449 Frames (NEMA) • 112-280 Frames (IEC)
Standard Industrial AC Induction Motors ! Table of Contents 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 severe bodily injury or loss of life. Receiving and Handling Acceptance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard Industrial AC Induction Motors Receiving and Handling 3 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 appropriate notation on your freight bill or express receipt.
Standard Industrial AC Induction Motors The following preparations should be followed: 1. Minimize condensation in and around the motor by use of desiccants or other humidity control methods. 2. Motor space heaters, when specified, must be energized when there is a possibility that the ambient storage conditions will reach the dew point. Space heaters are an option. 3. Coat all external machined surfaces with a material to prevent corrosion.
Standard Industrial AC Induction Motors 5 10. Space heaters, when specified, are to be connected and operable while in storage. 11. Windings must be meggered at the time equipment is put in storage (refer to step 4 on page 4). When the motor is removed from storage, the insulation resistance must not have dropped more than 50% from the initial reading. Any drop below this point necessitates electrical or mechanical drying. 12.
Standard Industrial AC Induction Motors Installation Inspection After the motor is unpacked, examine the nameplate data to see that it agrees with the power circuit to which it is to be connected. The motor will operate with frequency not more than 5% and voltage not more than 10% above or below the nameplate data, or combined variation of voltage and frequency of not more than 10% above or be low nameplate data. Efficiency, power factor and current may vary from nameplate data.
Standard Industrial AC Induction Motors 7 Lifting Means ! ATTENTION: When lifting means are provided for handling the motor, it should not be used to lift the motor plus additional equipment such as gears, pumps, compressors or other driven equipment. Failure to observe this precaution could result in bodily injury. In the case of assemblies on a common base, any lifting means provided on the motor or generator should not be used to lift the assembly and base.
Standard Industrial AC Induction Motors Figure 1 Mounting of 6 & 8 Hole Motor Frames View from above Not present on "6-hole frame" and not used on "8-hole frame" (allows F-1 to F-2 conversion on 8-hole frames) Drive Shaft End Use these holes for short frame designations 182, 213, 254, 284, 324, 364, 404, 444 (NEMA) Always use these holes which are closer to shaft.
Standard Industrial AC Induction Motors ! 9 ATTENTION: The user is responsible for conforming with the National Electrical code and other applicable local codes. Wiring practices, grounding disconnects and overcurrent protection are of particular importance. Failure to observe these precautions could result in personal injury or loss of life. Wiring ! ATTENTION: The following steps require rotating parts and/or electrical circuits to be exposed.
Standard Industrial AC Induction Motors Motors with resilient cushion rings usually must be provided with a bonding conductor across the resilient member. Some motors are supplied with the bonding conductor on the concealed side of the cushion ring to protect the bond from damage. Motors with bonded cushion rings should usually be grounded at the time of installation in accordance with the above recommendations for making ground connections.
Standard Industrial AC Induction Motors 11 Before starting the motor, check the following items: • The rotor should turn freely when disconnected from the load. • Driven machine should be unloaded when first starting the motor. The motor should run smoothly with little noise. If the motor fails to start and produces a decided hum, it may be that the load is too great for the motor or that it has been connected improperly. Shutdown immediately and investigate for trouble.
Standard Industrial AC Induction Motors Operation ! ATTENTION: Surface temperatures of the motor enclosure may reach temperatures which can cause discomfort or injury if contact is made with hot surfaces. When installing, protection must be provided by the user to protect against accidental contact with hot surfaces. Failure to observe this precaution could result in personal injury.
Standard Industrial AC Induction Motors 13 Motors with maximum surface temperatures listed on the nameplates. ! ATTENTION: The motor is designed to operate at or below the maximum surface temperature stated on the nameplate. Failure to operate the motor properly can cause this maximum surface temperature to be exceeded. If applied in a Division 2 or Zone 2 environment, this excessive temperature may cause ignition of hazardous materials.
Standard Industrial AC Induction Motors Maintenance and Repair The fundamental principle of electrical maintenance is keep the apparatus clean and dry. This requires periodic inspection of the motor, the frequency depending upon the type of motor and the service. ! ATTENTION: To ensure that the driven equipment is not unexpectedly started, remove all power before proceeding. Failure to observe this precaution could result in personal injury or death.
Standard Industrial AC Induction Motors 15 Removing Brackets and Rotor 1. Remove bearing cartridge nuts or screws (if used). 2. Remove opposite drive end bracket bolts. 3. Pull bracket. 4. Remove drive end bracket in same manner. 5. Remove rotor. Removing and Replacing Ball Bearings Bearings should not be removed unless they are to be replaced. When removal is necessary, use a bearing puller.
Standard Industrial AC Induction Motors Recommended Lubricant For motors operating in ambient temperatures shown below, use the following lubricants or their equivalent: Ball Bearing Motors Operating Temperature: –25 to 50 degrees C (–15 to 120 degrees F) Minimum Starting Temperature –60 degrees C (–76 degrees F) Chevron Oil – SRI No. 2 Exxon – Unirex N2 Shell Oil Co. – Dolium R Texaco, Inc. – Premium RB Shell Oil Co.
Standard Industrial AC Induction Motors ! 17 ATTENTION: Mixing lubricants is not recommended due to possible incompatibility. If changing lubricant without motor disassembly is desired, follow lubrication instructions and repeat lubrication after 100 hours of service. Care must be taken to look for signs of lubricant incompatibility, such as extreme “soupiness” visible from the grease relief area. Failure to observe this precaution could result in damage to or destruction of the equipment.
Standard Industrial AC Induction Motors Total Service Programs Allen-Bradley can provide a wide range of maintenance programs to help you reduce downtime, improve productivity and increase profits.
Standard Industrial AC Induction Motors 19 Cross Sectional and Parts Identification Drawing Find No. 1 2 3 4 5 6 7 8 Part Description Frame Stator Rotor/internal Cooling Fan Backend Bracket Frontend Bracket Shaft Backend Ball Bearing Backend Inner Cap Find No. 9 10 11 12 13 14 15 16 Part Description Frontend Ball Bearing Frontend Inner Cap Wave Washer, Frontend Fan Cover Outer Cooling Fan Front End Bracket Bolts Fan Cover Bolts Eyebolt Find No.
Online Documentation The latest motor information can be obtained from the Allen-Bradley Drives & Motors home page on the World Wide Web at: http://www.ab.com/drives/motors Publication 1329R-UM002A-EN-P Ð August, 2001 Supersedes 1329R-5.1 dated March, 1999 Copyright © 2001 Rockwell Automation. All rights reserved. Printed in USA.
