Electric motors workshop practice no 16 pdf test

Ieee transactions on industry applications, january 1986, p. There is a new 500kva voltage regulator to vary and control the output voltage from 0 to 600 volts, we can also test at 2300, 2850, 3300, and 4160 volts. Electric motor testing explained the electricity forum. Sme use a diesel generator to generate the electrical supply for the motor tests and can easily test at 50hz or 60hz frequencies. Motor controls basic theory quiz electrician exams.

Steve, electric motor rewinding should maintain or enhance eff i c i e n c y. Electric motor testing is usuallly the first thing to be sacrificed when cutting back on operational expenses. Isbn 07389785 ss95211 no part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. The primary objective of the energized electric motor testing class is to equip trainees with the knowledge and procedures needed to determine the condition of electric motors using deenergizedoffline motor testing tools and techniques. Remember that the three phases have identical windings or nearly so. Not all in stock at the present time electric motors. This book provides additional information about popular workshop applications for motors. Electric motors in the home workshop workshop practice. Download pdf electric motors in the home workshop free. Chapter 8 associated components and test gear chapter 9 some typical workshop applications.

And unexpectded motor failures costa company hundreds of thousands of dollars. Already very early in the last century the iec standard 342 was established and included the summation of losses. Electrical installation and workshop technology material type book language english title electrical installation and workshop technology authors f. You have reached 0 of 0 points, 0 not categorized 0% question 1 of 20. Inspection and test procedures for rotating machinery. There are a lot of tests for electric motors, many dependent on the size of the motor. Ieee std 1122004 revision of ieee std 1121996 ieee standard test procedure for polyphase induction motors and generators sponsor electric. The ohms reading for each winding must be the same or nearly the same. Direct link workshop practice series 16 electric motors. Induction motor testing and evaluation summary as energy costs rise, more emphasis is being placed on determining the health of large inductive motors. Continuing education units ceus and contact hours upon completion of this training program, the attendee will receive a certificate of completion with 8 contact hours. Learn the techniques and obtain valuable information to detect motor problems prior to failure, avoiding costly downtime. Workshop practice series 24 electric motors in the home.

But smart companies understands is that what this means for maintenance programs is billions of dollars of lost revenue through increased motor repair costs, downtime, and waste in industrial and commercial companies. Electric motor testing deenergizedoffline motor circuit. A sourcebook for industry v capacitor a device, the primary purpose of which is to introduce capacitance into an electric circuit. Written for professionals who work in electric motors, this covers updated traction applications, the latest on solidstate motor drive controllers, electrical and mechanical parameters, specifications, shapes, performance, protection, and more.

L e e s o n b a s i c t r a i n i n g leeson basic cover pages 102 11. Subject engineering subject headings electric engineering electric wiring electric power. Solenoids, timers, sensors, relays, troubleshooting, even an introduction to. Ieee std 1122004, ieee standard test procedure for. There are many types of ac motors, but this course focuses on threephase induction motors, the most common type of motor used in industrial applications. Touching a live wire and the electrical ground as shown in figure 1. This is about the easiest book you will find to read on electric motors and devices such as rotary phase converters, static phase converters, and variable frequency drives. You will get an electrical shock if part of your body completes an electrical circuit by. The authors earlier book electric motors workshop practice series no. While large electric motors can be extremely e cient at converting electrical energy to kinetic energy 90%, those e ciencies are only achieved when motors are wellmatched to their loads. Elbs publication date 1987 edition na physical description 3 v.

This electric motor control circuit training software is quite detailed. Electric motors in the home workshop special interest. Our electric motor testing training course teaches students the leading cause of motor failure. Model shown is no 2 for stator up to 600mm diameter. Along the way, the researchers became painfully aware that electric motors were too heavy, weighing upwards of 100 kg. Capacitors are usually classified, according to their dielectrics, as air capacitors, mica capacitors, paper capacitors, etc. For instance, pretty much no one tests a 100hp or smaller motor on a dynamometer unless its a very, very special motor.

Argus workshop practice series publications beven d young auto books ph 08 8298 5548 please note. Electric motor meps guide 3 what performance test method will be required. Isbn 0 85242 914 2 to follow all 7 parts of this series there is a playlist or just work your way though and follow the end screen. How to test three phase ac motors learning electrical. Dem electric combined coil cutoff and extraction machine also available for motors up to 1100mm diameter. Elementary first aid in electrical shops 20 workshop rules.

The training includes numerous handson lab exercises designed to help participants operate, test and troubleshoot electric motors. Electric motors and controls training electric motors and controls training certificate course software. Info from electric motors, workshop practice no 16, by jim cox. Buy electric motors workshop practice s 2nd revised edition by cox, jim isbn. Tee publishing provide the workshop practice series. List correct sequence of operation in the workshop and on the job iii. Workshop practice series 24 electric motors in the home workshop. When the motor is running and if the supply to the contactor coil fails, then motor will stop. Motor current monitoring and analysis mcsa is a straight forward tool to diagnosing problems with large inductive motors. The measured resistance values of motor field windings, exciterstator windings, exciterrotor. Electric circuit analogy 10 the airgap 11 reluctance and airgap flux densities 12 saturation 14 magnetic circuits in motors 15 torque production 16 magnitude of torque 18 the beauty of slotting 19 specific loadings and specific output 21 specific loadings 21.

Ac motors are used worldwide in many applications to transform electrical energy into mechanical energy. This, the second edition of this book by jim cox, deals with principles and characteristics of the wide range of motor types likely to be useful in small. Actual e ciencies in normal usage practice in the u. This is a good series of books covering most aspects of engineering practice, written by well known names in the model engineering world. Contactor coils are present in manual motor starters. If you have a 3phase motor and a single splitphase power to your house, read this and discover your options. A subsidiary of regalbeloit corporation leeson l5t 2n7 for more information contact. A circuit breaker with a slash rating, such as 120240v or 480y277v, shall be permitted to be applied in a circuit where the nominal voltage of any conductor to ground does not exceed the lower of the two values of the circuit breakers voltage rating and the nominal voltage between any two conductors does not exceed the higher value. Sometimes he has to demonstrate the correct method. Check the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal u to v,v to w,w to u.

If no evidence of distress or insulation failure is observed by the end of the total time of voltage. Argus workshop practice series publications an excellent. Electric motors in typical small workshop applications workshop practice series fundamentals of microcontrollers and applications in embedded systems with pic microcontrollers programming 16 bit pic microcontrollers in c, second edition. Sets out the basic techniques for oxyacetylene welding, brazing, flamecutting and electric arc welding with mild steel, cast iron, stainless steel, copper, brass and. Practice general workshop rules and regulations practicing general workshop rules and regulations i. As a supervisor, electrical diploma holder has to inspect test and modify the work done by skilled workers or artisans under hire. Appendix 3 demagnetisation and remagnetisation 4ppendix 4 motor terminology appendix 5 component suppliers.

Electric motor repair equipment whitelegg machines. An ac motor of this type may be part of a pump or fan or. Electric motors fit for racing cars university of oxford. Good overview of techniques used in a good motor repair shop to optimize. Detailed advice is given on how to identify and make good.