Many simple across the line singlephase and 3phase motors used in household appliances and industry respectively can be checked simply by changing the range of the ohm meter to the lowest offered r x 1, zeroing the meter again, and measuring the resistance between the leads of the motor. An electric motor is an extremely handy device which has multiple uses. Common causes for electric motor failure motor failure. Every good electrician knows the lead numbering sequence of three phase motors, or he has diagrams available for ready reference.
The very first thing that you should do before starting any type of maintenance on a motor is a visual inspection, a lot of times the trouble can be found just by looking, because if the problem is that bad then it should be very obvious by observation. What qualities make the threephase induction motor popular for industry page 201. Almost all electrical equipment requires planned inspection and maintenance being carrying out. Free engineering software and engineering books pdf. All things plc, rockwell plc, even plc ladder logic simulator. This industryleading resource begins with electric motor principles, power requirements, and control methods and focuses on the safe operation. If you make multipiece motor covers with screws for assembly, then you are adding another hour to the job. The protection is a requirement along with their function and integration with the overall system ensures that such expensive apparatus is well guarded against failures which further. Equipment connected to the shaft will not cause mechanical rotation.
Club car 1996 ds golf car electric pdf user manuals. Be sure such technicians observe standard safety precautions including those. Electrical symbols, mechanical books, maintenance management and more. This ensures electrical equipment is kept in good working condition at all times. Do not lift both the motor and driven equipment with the motor lifting means. They will troubleshoot industrial components from pushbuttons to relays and motor starters. C, iec 364 pren5011001, and all local and utility regulations and safety standards. Each inspection period varies with the environment and operating conditions. Installation and maintenance manual worldwide electric. Familiarization with and adherence to nema mg2, the national electrical code nec and local codes is required.
Electrical maintenance and troubleshooting d, e and s series controller the kawasaki electrical maintenance and troubleshooting course is designed to introduce participants to the major electrical components of the kawasaki controllers and their digital servo systems. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide contains new information on threephase motors along. It is usually sufficientto include motors in the maintenance schedule for the driven machine or the general plant equipment. Short description the industry relies on a steady flow of new entrants and apprentices to help meet the skills. Safe installation, operation, and maintenance must be performed by qualified personnel. How to solve common electric motor problems and get great. Tips for troubleshooting electric motors understanding the nuances of various motor types is essential when servicing or installing such units b y d e n n i s b u s h a fter more than 100 years of use, with an ever increasing installed base, there are probably few aspects of an electric motor s usage and failure modes. In troubleshooting a motor you may need to verify that the motor lead numbers are correct, and that there have been no electrical faults that create short circuits between the different phases.
Maintenance and troubleshooting of electric motors s jagathisen t felda holdings bhd, tingkat 9, balai felda, jalan gurney 1, 54000 kuala lumpur, malaysia. The speed of a threephase induction motor is governed by the number of poles, the hz of the power source, and the load page 201. Troubleshooting problems on your ac motor is relatively straightforward, and providing you have reasonable doityourself abilities, repairing it is not too difficult. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide contains new information on threephase motors along with coverage of the. Electric motor maintenance and troubleshooting pdf. Before starting maintenance procedures, be positive that. Electric motor drive installation and troubleshooting is designed for technicians in the field responsible for installing, programming, troubleshooting, and retrofitting electric motor drives. When preparing to service the motor, all power sources to the motor and.
Electric motor predictive and preventive maintenance guide. Electric motor maintenance and troubleshooting, 2nd. When a motor fails, it is often difficult to see why it failed just by looking at it. Maintenance and troubleshooting of electric motors reliance electric posted 11005 motor maintenance scheduled routine care introduction the key to minimizing motor problems is scheduled routine inspection and service. If the motor problems cant be resolved with this list, please contact your supplier for assistance.
It is comparatively easy to obtain the required speed through the use of motors directly connected to the driven machine, through speed reducers, or the now more economical geared motors, or even through vbelt or chain or sprocket drive. Verify continuity of windings motor leads to unpainted motor end plate. Simple steps to electric motor maintenance r baker. Polyphase ac induction motor troubleshooting guide d 5t application data troubleshooting guide warning allow only qualified personnel to perform troubleshooting and maintenance of motors. He owned an electric motor repair shop for a number of years, and he taught the electric motor repair course at. The internal parts of a motor could be at line potential even when it is not rotating. Understanding maintenance and troubleshooting procedures of such vital industrial equipment means that reduced downtime and increased productivity for the company. Click on document electric motor maintenance and troubleshooting 2nd edition augie hand. A fully uptodate, handson guide to electric motors. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide. This article describes ac electrical motor troubleshooting. Electric motor drive installation and troubleshooting atp. Troubleshooting troubleshooting and maintenance 62 troubleshooting safety messages please read the following safety messages before troubleshooting or performing maintenance on the inverter and motor system.
A wellplanned electric motor preventive maintenance programme is the key to dependable, longlife operation of electric motors. Below are some of the frequently asked questions regarding electric motor troubleshooting that have been answered by the experts. Qualified personnel should perform installation, operation and maintenance of electrical machinery. This guide provides information on establishing an effective maintenance program to help prevent unexpected motor failures, costly downtime, and unnecessary maintenance costs. Most of the electric motor failures occur at the start up. Electrical troubleshooting and preventive maintenance. Electric motor maintenance and troubleshooting, second edition explains.
Electric motors should be installed very carefully and should be looked after at regular intervals. Participants learn the basics of electric motors including how to maintain and troubleshoot common problems found in the workplace. Wait at least five 5 minutes after turning off the input power supply before performing maintenance or an inspection. Electric motor maintenance and troubleshooting, 2nd edition explains in detail how all types of ac and dc motors work. Furthermore, some parts that have been used for 20,000 hours or 5 years may need to be replaced, requiring an overhaul if there are many of them. Download electric motor maintenance and troubleshooting. And you can bet that the cover will not be screwed back into place properly. Review of electric motor maintenance and troubleshooting. The modern electric motor installation the individual motor drive has practically replaced all other types. Download electric motor maintenance and troubleshooting, 2nd.
Inducer motor use troubleshooting guide check voltages line, pw and feedback voltages. Electrical motors installation and maintenance manual safety first high voltage and rotating parts can cause serious or fatal injury. A motor placed in storage may or may not work, regardless of its physical appearance. They will wire basic electrical circuits using wiring diagrams and then, once they understand how they operate, they will troubleshoot faults inserted by the instructor. Design onepiece electric motor covers that are light weight, are well ventilated and can be liftedoff by one person. Therefore, motor troubleshooting involves the entire system, not just the. Augie hand had 30 years of handson experience in repairing and troubleshooting motors, followed by 15 years of giving seminars on the subject for electric motor repair shop technicians and inhouse training for large industry maintenance technicians. Electric motor troubleshooting questions about electric. Tips for troubleshooting electric motors understanding the nuances of various motor types is essential when servicing or installing such units b y d e n n i s b u s h a fter more than 100 years of use, with an ever increasing installed base, there are probably few aspects of an electric motors usage and failure modes. High voltage and rotating parts can cause serious or fatal injuries.
Electric motor maintenance and troubleshooting, 2nd edition. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in the driven machinery. This course covers the operation and maintenance of ac and dc motors, including 3phase, dual voltage and multiple speed motors. Check the source of power, overload, fuses, controls, etc. Motor maintenance and inspection since this motor does not use wearprone parts, the following daily inspection is sufficient. A general guide to dc motor maintenance ohio electric motors. Electric motor maintenance and troubleshooting, 2nd edition explains in detail how all types of ac and dc motors work essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide contains new information on threephase motors along with coverage of the latest. View online or download club car 1996 ds golf car electric service manual. The laminations in a 25hz motor core are thicker than those in a 60hz. Maintenance and troubleshooting of electric motors. There are also other factors which greatly affect the performance of electric motors such as low resistance, dirt, moisture, overcurrent and vibrations.
Electric motor maintenance and troubleshooting, second edition explains in detail how all types of ac and dc motors work. Mar 29, 2019 check that the windings are not open or blown. Refer to the wiring diagram to verify the motor is wired correctly. Therefore, motor troubleshooting involves the entire system, not just the motor. Maintenance and troubleshooting three phase induction motor. The only userserviceable parts on an ac motor are the brushes and the bearings. Vehicle maintenance and repair imi institute of the motor. The frequency of routine service varies widely between applications. An ac motor is commonly used as a constantspeed drive when fed from a voltage source of fixed frequency. Electric motor predictive and preventive maintenance guide electric motor failure could result in lost capacity as well as excessive repair and maintenance costs. Disconnect all power to the motor before performing any maintenance which could require. Troubleshooting and maintenance 6 automationdirect.
1498 529 110 933 105 1359 338 720 947 482 1496 876 1360 1500 1116 992 1397 1429 72 847 1301 548 1131 438 28 842 1407 1038 56 1222 728 1233 893 723 1262 527 856