Inducer motor use troubleshooting guide check voltages line, pw and feedback voltages. Maintenance and troubleshooting of electric motors s jagathisen t felda holdings bhd, tingkat 9, balai felda, jalan gurney 1, 54000 kuala lumpur, malaysia. Electrical symbols, mechanical books, maintenance management and more. 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. The internal parts of a motor could be at line potential even when it is not rotating. Therefore, motor troubleshooting involves the entire system, not just the. These motors usually function without many problems, but they do require maintenance and repairs at times. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in the driven machinery.
Mar 29, 2019 check that the windings are not open or blown. Electric motor predictive and preventive maintenance guide. Troubleshooting problems on your ac motor is relatively straightforward, and providing you have reasonable doityourself abilities, repairing it is not too difficult. 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. Electric motors should be installed very carefully and should be looked after at regular intervals. Simple steps to electric motor maintenance r baker. Electric motor maintenance and troubleshooting, 2nd edition. This industryleading resource begins with electric motor principles, power requirements, and control methods and focuses on the safe operation. Ac drives troubleshooting and maintenance nowadays, ac motors are the most important workhorses in industry and commercial facilities. The laminations in a 25hz motor core are thicker than those in a 60hz. Be sure such technicians observe standard safety precautions including those. 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. If you make multipiece motor covers with screws for assembly, then you are adding another hour to the job. Vehicle maintenance and repair imi institute of the motor. 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.
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 and maintenance 6 automationdirect. Wait at least five 5 minutes after turning off the input power supply before performing maintenance or an inspection. Electric motor maintenance and troubleshooting, second edition explains in detail how all types of ac and dc motors work. They will troubleshoot industrial components from pushbuttons to relays and motor starters. 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. Electric motor maintenance and troubleshooting, second edition explains. What qualities make the threephase induction motor popular for industry page 201.
An electric motor is an extremely handy device which has multiple uses. Maintenance safe maintenance practices performed by qualified personnel are imperative. This course covers the operation and maintenance of ac and dc motors, including 3phase, dual voltage and multiple speed motors. All the terms used are explained or defined throughout the courses, so participants are not required to have an extensive technical vocabulary to. The only userserviceable parts on an ac motor are the brushes and the bearings. If the motor problems cant be resolved with this list, please contact your supplier for assistance. C, iec 364 pren5011001, and all local and utility regulations and safety standards. Electric motor maintenance and troubleshooting, 2nd. 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. And you can bet that the cover will not be screwed back into place properly. The modern electric motor installation the individual motor drive has practically replaced all other types.
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. Maintenance and troubleshooting of electric motors. Disconnect all power to the motor before performing any maintenance which could require. Download electric motor maintenance and troubleshooting, 2nd. Electric motor predictive and preventive maintenance guide electric motor failure could result in lost capacity as well as excessive repair and maintenance costs. Do not lift both the motor and driven equipment with the motor lifting means. Equipment connected to the shaft will not cause mechanical rotation. Verify continuity of windings motor leads to unpainted motor end plate. This guide provides information on establishing an effective maintenance program to help prevent unexpected motor failures, costly downtime, and unnecessary maintenance costs. 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.
Participants learn the basics of electric motors including how to maintain and troubleshoot common problems found in the workplace. High voltage and rotating parts can cause serious or fatal injuries. View online or download club car 1996 ds golf car electric service manual. Club car 1996 ds golf car electric pdf user manuals. Motor maintenance and inspection since this motor does not use wearprone parts, the following daily inspection is sufficient. Safe installation, operation, and maintenance must be performed by qualified personnel. Understanding maintenance and troubleshooting procedures of such vital industrial equipment means that reduced downtime and increased productivity for the company. Electric motor drive installation and troubleshooting atp. Electric motor maintenance and troubleshooting, 2nd edition explains in detail how all types of ac and dc motors work. Refer to the wiring diagram to verify the motor is wired correctly. Installation and maintenance manual worldwide electric. 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. 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. 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.
Handson and lecture the participant is able to learnbydoing in the. A general guide to dc motor maintenance ohio electric motors. When preparing to service the motor, all power sources to the motor and. Familiarization with and adherence to nema mg2, the national electrical code nec and local codes is required. Electric motor maintenance and troubleshooting pdf. Most of the electric motor failures occur at the start up. Electric motor maintenance and troubleshooting by augie. An ac motor is commonly used as a constantspeed drive when fed from a voltage source of fixed frequency. Check the source of power, overload, fuses, controls, etc. Common causes for electric motor failure motor failure. 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. Electrical motors installation and maintenance manual safety first high voltage and rotating parts can cause serious or fatal injury. Short description the industry relies on a steady flow of new entrants and apprentices to help meet the skills. Essential for anyone who needs to buy, install, troubleshoot, maintain, or repair small to industrialsize electric motors, this practical guide.
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. Download electric motor maintenance and troubleshooting. 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. 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. All things plc, rockwell plc, even plc ladder logic simulator. Maintenance and troubleshooting three phase induction motor. It is usually sufficientto include motors in the maintenance schedule for the driven machine or the general plant equipment. Electric motor drive installation and troubleshooting is designed for technicians in the field responsible for installing, programming, troubleshooting, and retrofitting electric motor drives. Therefore, motor troubleshooting involves the entire system, not just the motor. Most of them are caused by the overheating of motor. Almost all electrical equipment requires planned inspection and maintenance being carrying out. 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. Free engineering software and engineering books pdf.
Click on document electric motor maintenance and troubleshooting 2nd edition augie hand. Polyphase ac induction motor troubleshooting guide d 5t application data troubleshooting guide warning allow only qualified personnel to perform troubleshooting and maintenance of motors. Institute of the motor industry 9hklfoh0dlqwhqdqfhdqg5hsdlu qjodqg. Electric motor troubleshooting questions about electric. Qualified personnel should perform installation, operation and maintenance of electrical machinery. He owned an electric motor repair shop for a number of years, and he taught the electric motor repair course at. Each inspection period varies with the environment and operating conditions.
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. Electric motor drive installation and troubleshooting. This ensures electrical equipment is kept in good working condition at all times. This article describes ac electrical motor troubleshooting. A fully uptodate, handson guide to electric motors. Before starting maintenance procedures, be positive that. Review of electric motor maintenance and troubleshooting. When a motor fails, it is often difficult to see why it failed just by looking at it.
The frequency of routine service varies widely between applications. Every good electrician knows the lead numbering sequence of three phase motors, or he has diagrams available for ready reference. Design onepiece electric motor covers that are light weight, are well ventilated and can be liftedoff by one person. There are also other factors which greatly affect the performance of electric motors such as low resistance, dirt, moisture, overcurrent and vibrations. Electrical troubleshooting and preventive maintenance. How to solve common electric motor problems and get great. A motor placed in storage may or may not work, regardless of its physical appearance.
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