Abb, a motor and generator manufacturer, developed an impressive recycling program over the past year. Thus the torque is proportional 2to i so it gives the highest torque per current ratio over all other dc motors. Assemble a manual motor testing station that illustrated the required components and procedures for determining power factor and efficiency. Uses soft magnet rotor that is magnetized by the application of current in the stator coils 3. Routine monitoring is not only the most effective method of determining an early diagnosis, but it has many other positive aspects. Beyond dyno electric motor testing services, global electronic services is able to perform a broad set of work and testing on your ac and dc motors. Jul 01, 2015 basic motor testing with multimeters and ammeters july 1, 2015 by david herres 12 comments when an electric motor fails to start, runs intermittently, runs hot, or continually trips its overcurrent device, there my be a variety of causes. Iec 6003421 is a welcome development and it is hoped that this guidance document can help inform the redrafting process. Types, losses in induction motors, motor efficiency, factors. Pdf testing and analysis of induction motor electrical faults.
Electric motor testing deenergizedoffline motor circuit. The goal here is to describe the testing at a level above the physical attributes, such as temperature, pressure, force, and so on, but below the level of a final assembly inside of which the electric motor resides. This test can be done in your own workshop using simple hand tools and a. When a bad motor winding cannot be found by a physical inspection, many times an ohmmeter may show that there is a defective winding. The motor is run at rated voltage and frequency without any shaft. Addressing inplant electrical distribution and power quality issues. Routine test of three phase induction motor vishant naik1, saurabh k singh2, sahil chawhan3, jatin wankhede4.
Home technical articles testing and commissioning procedure for electric motors scope of motor testing it should be noted that the scope of motor testing depends upon the motor type and size, this being indicated on the inspection forms. Model repair specifications for low voltage induction motors. Steve, electric motor rewinding should maintain or enhance eff i c i e n c y. Static electric motor testing looks at the motors insulation system, while online or dynamic electric motor monitoring can identify issues regarding power quality and load issues. Through use of the testers, unexpected downtime and motor repairreplacement costs are reduced dramatically, resulting in rapid roi and increased production. Task c testing centres began in early 2009, led by australia with participation from switzerland and denmark. Insulation test method overview electrical insulation is a dielectric electric fields cause atoms to polarize with a change to capacitance as they polarize. Assemble a computerassisted motor testing station to. Motors used in testing and their nameplate specifications. A motor s efficiency tends to decrease dramatically below about 50% load. When an electric motor fails to start, runs intermittently, runs hot, or continually trips its overcurrent device, there my be a variety of causes.
The wrst nine questions test general understanding. The magnet is spun by a 3 phase ac motor with no rotor voltage 4. How to test and check single phase electric motors custom search. Most repair shops will use a megger or a ground insulation tester. Designed to run the motor after rewind or servicing. Induction motor testing and evaluation summary as energy costs rise, more emphasis is being placed on determining the health of large inductive motors. Ieee std 1122004, ieee standard test procedure for polyphase. Electric motor testing training the electricity forum. The squirrel cage induction motor was designed for an extended service life under very demanding. In addition to providing basic information about ac motors in general, this course also includes an overview of. Most electric motors are designed to run at 50% to 100% of rated load. This compilation is not intended as a complete survey of the field of electrical and electronic equipment testing. There are few, if any, serviceable parts in small electric motors, and generally its less expensive to buy a replacement rather than attempt a repair.
A motor placed in storage may or may not work, regardless of its physical appearance. Electricdiesel fire pump check list march 2014 3 the heat exchanger piping for a diesel engine driver is equipped with an indicating manual shutoff valve, an approved flushingtype strainer, a pressure regulator, an automatic valve listed for fire protection service, and a. Electric motor testing is usuallly the first thing to be sacrificed when cutting back on operational expenses. When an electric motor is broken, one suspect is the fiel coild of the motor stator. Prakasam and others published testing and analysis of induction motor electrical faults using current signature analysis find, read. Selected office of industrial us department of energy. The first battery electric vehicles that will appear on the market are passenger cars in the lower car segments. Electric motors fit for racing cars university of oxford. An electric motor converts electrical energy to mechanical torque using an interaction of magnetic fields. My original aim was to bridge the gap between specialist textbooks which are pitched at a level too academic for the average user and the more prosaic handbooks, which are full of useful detail but provide. So when a motor fails to operate it may not be obvious what the problem is. We look at different motor types, methods for testing them, which megohmmeters to.
Menzel electric motor test field in berlin offers the latest test engineering for manufacturerindependent motor tests up to. Procedures built on industry standards, such as ieee, protect your investment in motor repairs. Measurement of power characteristics in 3phase motor development u1 a3 communication wt333e threephase voltage, current and power can be displayed together with the frequency or harmonic distortion and other parameters at measurement speeds up to 100 ms. Traction motor test set high power motor test systems systems. Modular construction to suit the clients test requirements and budget. Our comprehensive electric motor testing courseemphasizes basic and advanced information about electric motortesting equipment and procedures. Whitelegg manufacture a large range of ac only or ac and dc test panels for electric motors. Motor current monitoring and analysis mcsa is a straight forward tool to diagnosing problems with. We offer a full inhouse rebuild and repair shop with machining capabilities to ensure you have a motor in perfect working order. Electric motor efficiency under variable frequencies and loads itrc report no. Electric motor testing is usually the first thing to be sacrificed when cutting back on operational expenses. Experience, combined with high levels of engineering education, is the foundation of our industryleading electrical motor testing and analysis procedures designed to reveal even the most complex motor problems.
Test results of motor starter equipment shall be in accordance with. Specific training is required if the personnel assigned to the task of. Specifically, doe is requesting comment on any opportunities to streamline and simplify testing requirements for small electric motors. Electric motors are relatively simple mechanical devices, but rewinding the coils on a dc motor is a precise task that should. However, if youre motor isnt working, use a multimeter to test it before deciding to replace it. Any deviation signifies a possibly bad electric motor or a motor that requires repairs. Rtd circuits shall be in accordance with system design intent and machine protection device. Traction motor test set high power motor test systems. 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. Rewinding of motors pdf the information in this report and the good practice guide to maintain motor efficiency part 2 was. Throughout germany, only a few groupindependent providers offer test services of this kind.
Improving motor and drive system performance department of. Introduction to electric motor system diagnostics the reliability and energy consumption of electric motors and the systems they drive has a direct financial impact to industrial and commercial enterprises we will discuss the financial justification for a motor testing program, a general discussion of deenergized and energized. Pdf the aim of this paper is to present the station for electrical motor testing with its potentials. This document assumes that suppliersvendors sv have been prequalified by a. Motor test equipment magtrol offers three types of dynamometers, each with a different braking system to absorb load. Electric motors have had a reputation for being a mix of science and magic. Measurement of power characteristics in 3phase motor. Testing electric motors doesnt have to be a mystery. If you have a dc motor that is malfunctioning or drawing and bleeding power through the wires, there are tests that can be done to test the efficacy of the dc motor. Both applications are needed to obtain a complete report on the motors health. As with all testing and inspections, the motor name plate provides valuable information that will help to ascertain the true health of the motor.
Electrical testing usually consists of insulation resistance. Ieee transactions on industry applications, january 1986, p. Determining electric motor load and efficiency department of energy. The squirrel cage induction motor was designed for an extended service life under very demanding conditions. It is therefore used in starter motors of cars and elevator motors p. Measurement of power characteristics in 3phase motor development. Horizontal squirrel cage mediumvoltage induction motor.
Motor testing and general checks format free download as word doc. Electricdiesel fire pump check list march 2014 3 the heat exchanger piping for a diesel engine driver is equipped with an indicating manual shutoff valve, an approved flushingtype strainer, a pressure regulator, an automatic valve listed for fire protection service, and a second indicating manual shutoff valve. Magtrols dynamometers, electronics and software are used for testing all types of electric and pneumatic motors, gas engines and gearheads, as well as servo drives and inverters. Types of electric motor testing unlike vfds, electric motors have several widely accepted types of testing.
The possibility of carrying out routine testing and type tests for all motor makes at our test facility including electric motors that were not purchased from menzel will make you more flexible in the future. Jul 06, 2016 testing electric motors doesnt have to be a mystery. Its possible the problem could be the wring or the power source and not the electric. Maximum efficiency is usually near 75% of rated load.
Inspection and test procedures for rotating machinery. When a motor fails, it is often difficult to see why it failed just by looking at it. Petrol and diesel powered passenger vehicles in the submini class, mini class and the compact class are compared with battery electric vehicles from the same classes. Reasons to determine motor loading most electric motors are designed to run at 50% to 100% of rated load. Electric motors for explosive atmospheres instructions manual for installation, operation and maintenance of electric motors date. Search wegspecificationofelectricmotors50039409manual. The monitoring of electric motors motor in the future. The first describes the testing of various electronic components, assemblies, and systems. Electricdiesel fire pump check list north carolina. Other nonrecyclable waste was turned into energy through their recent zero landfill initiative. Electric motor repair, model repair specifications for low voltage motors, and motor repair tech brief were produced by the u. Motor current monitoring and analysis mcsa is a straight forward tool to diagnosing problems with large inductive motors. Electric motor testing explained the electricity forum.
Aaa electric vehicle range testing aaa proprietary research into the effect of ambient temperature and hvac use on driving range and mpge february 2019. We have test systems available for testing fractional up to 50,000 hp motors. This study guide assumes the reader has a firm understanding about acdc electricity. A crane motor must make lots of starts and stops with anything from a full load to an empty hook it should be able to tolerate a high starting current without overheating the motor must be able to rotate in both directions konecranes motors are designed to endure the various forces induced on the normal crane operating environment. This document contains proprietary information of general electric company, usa and is furnished to its customer solely to assist that customer in the installation, testing, operating andor maintenance of the equipment described. An electric motor systems annex emsa was launched at the end of 2008 as part of the iea 4e implementing agreement and is made up of a number of tasks.
An ac motor of this type may be part of a pump or fan or connected to some other form of mechanical equipment such as a winder, conveyor, or mixer. Introduction this manual provides information on how to safely install, couple to the driven equipment, and maintain the toshiba squirrel cage mediumvoltage induction motor. Test facility configuration pdf, 124 kb your advantages with us. This region is bounded by murky lines, but staying at this level enables tangible comments. In this video, we show different tests balancing test, continuity coil to stack test that can be completed. Can be combined with a dynamometer for load testing of motors. 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. Motor test for medium voltage mv and high voltage hv.
Recycling included more than 2,727 tons of scrap metal, wood, used oil, batteries, electronics, lamps, paper, cardboard and plastic. 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. Member asae asae asae abstract a computerized, pcbased, data acquisition program that measures motor torque, speed, inputoutput power, power factor, and temperatures for an electric motor. The subtests that make up a test procedure shall be performed in the sequence listed. Along the way, the researchers became painfully aware that electric motors were too heavy, weighing upwards of 100 kg. The megger will help to detect areas of deteriorating insulation where the windings may soon short. The wire itself is usually copper or aluminum, which is known to be a good conductor of the electric current that powers your equipment. Knowledge of the basics together with powerful new test equipment vastly simplifies the job. Largerange active load for dynamic motor testing university of. Department of energys office of industrial technologies oit with input from trade associations, consulting companies, manufacturers, nonprofit corporations, and others. This paper will focus only on motor testing yellow highlight. What determines that the motor repair was successful and that the motor is operating at satisfactory levels. Ieee std 1122004 revision of ieee std 1121996 ieee standard test procedure for polyphase induction motors and generators sponsor electric. Threephase dualvoltage motor insulation resistance testing.
What is electric motor testing and why is it done electrical maintenance programs are designed to increase equipment promptness and uptime while decreasing capital operating cost. While electric motors are a common asset, many otherwise talented maintenance and reliability professionals are not savvy in how electric motor testing works, particularly how to analyze the captured data. The iec, iso standard requirements normally are applied for inspection and test plan of induction motor in manufacturing shop. Motor testing includes in process testing, and the tests may be witnessed or not depending on enduser preference. A system with too small of motor may not be able to perform the intended task or may. Waveform and harmonic measurement requires the harmonic measurement option g5. 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. Test results of surge protection devices shall be in accordance with procedures for testing of lv surge arresters. How to test and check single phase electric motors.
We exclusively use pdma corporations line of portable test equipment designed to improve electric motor reliability. The speed of an ac motor depends on the frequency of the input power and the number of poles for which the motor is wound. Electric motor testing equipment, along with accessories such as motor temperature, winding temperature measurements, motors mounting test bed, test stands with t. Motor testing and general checks format electric motor switch. The complete guide to electrical insulation testing. Evaluation of electric motor condition using motor circuit. Guide for the use of electric motor testing methods based on iec 6003421 p ll determined from residual loss 8. Pdf electrical motor testing station with electromagnetic load. Thus, a 10horsepower hp motor has an acceptable load range of 5 to 10 hp. This work has now been taken over by the iea efficient electrical enduse equipment 4e electric motor systems annex emsa task c testing centres. Motor circuit breakers manual motor protectors motor protection circuit breakers validity note this document applies to tesys gv4pem devices and tesys gv4pb devices. Tests results are provided graphically and tabulated.
Testing and commissioning procedure for electric motors eep. But smart companies understands is that what this means for maintenance programs is millions of dollars of lost revenue through increased motor repair costs, downtime, and waste in industrial and commercial companies. The rotor has salient poles and a cage so that it starts like an induction motor, and runs like a synchronous motor. Online information the information contained in this guide is likely to be updated at any time. Guide for source inspection and quality surveillance of. However, should the motor require service, this manual includes a section that assists the. When the motor was brought online, there was an 11% p. But the fact is that very few motor repair shops have documented inspection and acceptance testing procedures.
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