The paper also describes a detailed procedure of design. Engine testing and instrumentation 2 repeatability is king. Ieee test procedure for poly phase induction motors and generators. Routine test of three phase induction motor vishant naik1, saurabh k singh2, sahil chawhan3. With the motor at normal operating temperature, the vibration velocity shall not exceed 2. Dc motor fault zone analysis is a vital part of any dc motor maintenance program.
The megger insulation tester is a small, portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Using the megger to test a threephase motor is rather easy, though the safety hazards for this procedure are quite high. Motor testing is a lowimpact, highvalue way to extend the life of your equipment. Standard for acceptance testing specifications for. Also any other recommendations for testing equipment many thanks. Implementing a predictive maintenance program takes a. Do not lift both the motor and driven equipment with the motor lifting means. Procedure 2procedure for testing pwm controlled units the pwm gas furnace motor uses a pulse width modulated signal from the furnace circuit board to determine airflow, and receives feedback from the motor to determine proper rpm. Measuring motor parameters control technology corp. Some of the process failures that can be detected by a productionline hipot test include, a transformer wound in such a way that creepage and clearance have been reduced.
Thus some other procedure must be used to measure the current or torque and velocity. The temperature rise should not be bo more than specified value in the induction motor testing procedure or motor datasheet. 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. Ieee std 1122004 revision of ieee std 1121996 ieee standard test procedure for polyphase induction motors and generators sponsor electric. Companies across the globe trust our reliability solutions, products, and services. Test results of motor starter equipment shall be in accordance with. Turn on motor and increase the rpm to the first rpm value.
Motors are susceptible to the gradual failure of their insulation resistance. The electromagnetic load emulator ele is designed to be an adjustable load of an electric motor. Test results of surge protection devices shall be in accordance with procedures for testing of lv surge arresters. Recommended interpretation of iec 6003421 external contact seals at the drive shaft extension ends shall be removed prior to testing. It is most commonly used in industrial installations with multiphase power supplies. Motor testing equipment newer more contemporary instruments make testing even easier. Apply rated voltage and frequency with no mechanical load.
Pdma corporation designs and manufactures portable motor testers. How to test three phase ac motors learning electrical. December 30, 2018 february 24, 2012 by electrical4u. The no load test on an induction motor is conducted to. The third party inspection for induction motor article provides a sample procedure instruction for induction motor testing and induction motor inspection in manufacturing shop. Ieee std 1122004, ieee standard test procedure for. Pdf 32 pp, 326 k, july 11, 2006 about pdf this rule applied part 1065 to stationary compressionignition engines. For good insulation, the resistance usually reads in the megohm range. Ieee std 1122004, ieee standard test procedure for polyphase. For instance, when testing electrical cabling or switchgear. Ac motor testing performed with pdma mce offline tester resistive imbalance during this test a dc voltage is applied to the motor. Engine build specification ignition and injection timing type of fuel, oil and coolant.
Such a failure could result from a new operator in the winding department the hipot test a versatile test. A good understanding of the application and how to evaluate the motor in. The windings are marked with tags u1 and u2, v1 and v2, w1 and w2. The basic steps in ascertaining the health of a threephase ac motor are given below. These motors run conveyor belts, pumps, fans, and many other applications. The megger technical library provides access to a range of additional content and resources such as technical guides, application notes and more. A motor placed in storage may or may not work, regardless of its physical appearance. Uglum the university of texas at austin center for electromechanics the development of high power density electrical machines continues to accelerate, driven by military, transportation, and industrial. These tests include a simple ac withstand test and diagnostic testing like tan deltapower factor measurement and partial discharge analysis. The patriot,mill turn and turnado machines are equipped with 3 phase motors. The complete guide to electrical insulation testing. Home technical articles inspection and test procedures for rotating machinery, synchronous motors and generators. Pdma corporation is the leader in the field of predictive maintenance, condition monitoring applications, and the development of electric motor test equipment for motor circuit analysis.
Work permit shall be prepared prior to start any activities. This region is bounded by murky lines, but staying at this level enables tangible comments. From this voltage the actual resistances of the windings are measured. Intervals can be user defined but at a minimum must include flow rates of 5, 10, 15, 20, 25, 30, and 32 gpm. Inspection and test procedures for rotating machinery. Engine testing regulations vehicle and fuel emissions. Measurement procedure 21 dielectric absorption 21 charging current 21 leakage current 21 leakage current test 22 what is a safe level of leakage. Ieee standard test procedure for polyphase induction motors and generators 3 park avenue, new york, ny 100165997, usa ieee power engineering society sponsored by the electric machinery committee 4 november 2004 print. Testing and commissioning procedure for electric motors eep. A guide to low resistance testing test equipment depot.
The test can be applied to stator and rotor windings on asynchronous motors, stator and rotor windings on synchronous motors and the armature and field windings on dc motors. The three resistance readings of a threephase induction motor are compared and calculated to obtain the resistive imbalance. Third party inspection for induction motor procedure. Dropforged eyebolts per american society of testing materials a489 or equivalent must be used. 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. Threephase dualvoltage motor insulation resistance testing. In order to repeat any given test at some time in the future, it is essential that all variables are noted, for example. Electric motor efficiency under variable frequencies and loads pdf r06004. Motor current signature analysis mcsa is a proven and accepted method for determining the condition of a motors current carrying components. Learn the most common reasons why servo motors fail. Check procedure if the motor does not run, make sure you have power to the ifc board and then check the voltage between pins 4 and 5 of the 5 pin plug on the motor. It can give an accurate reading of the measure of resistance and continuity available in a highvoltage circuit and electrical motor.
Summary a summary report will be prepared for each motor and include the results with the actual values of each of these tests. The megger insulation tester is essentially a highrange resistance meter ohmmeter with a builtin directcurrent generator. Pdma corporation has developed these portable motor testers. Inspection and test procedures for rotating machinery, synchronous. The ecm motor tester simulates the furnace board signals and runs the blower motor at 3 different speeds. Inspection and test procedures for rotating machinery, mynchronous motors and generators consist of visual and mechanical inspection, electrical tests. Appliance testing 34 motor testing 34 transformer testing 35. The induction motor shall run at the rated voltage and frequency, and each bearing temperature is measured periodically. Naturally, the bearing temperature will increase by passing the time.
The test method is determined by the type of equipment being tested and the reason for test ing. We are constantly doing what everyone else just talks about. Sealing elements that can only be removed by dismantling the motor shall be left in place. Electrical safety testing reference guide iso 9001 certified. However, in many cases these tests are not performed, even the basic ac. Knowing some basic methods and techniques along with having a. With an ohmmeter set to the resistance or ohms test setting, place test probes into. Implementing a predictive maintenance program takes a pm program to the next level. Threephase dualvoltage motor insulation resistance testing threephase dualvoltage motors are used for most daytoday operations in todays industrial plants. 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.
Demand of energy is growing day by day and along with it cost of energy rising abruptly, so now it is necessary that the health of large motors which consumes maximum power should be taken care off. When a motor fails, it is often difficult to see why it failed just by looking at it. Perform resistance tests on resistance temperature detector rtd circuits. Motor parameters these are the motor parameters that are needed. Testing guidelines procedures 28 test equipment 29 choosing the right tester 29 recommended tester features 30 general tester features 30 production tester features 31 accessory equipment 33 tester calibration 33 nist standards 33 120 kohm leakage impedance 33 tester applications 34 appliance testing 34 motor testing 34. The motor was a squirrel cage induction motor, tefv. In this video we will explain step by step the correct way to complete the repair process of a. The first neta acceptance testing specifications for electrical power equipment and systems was produced in 1972.
Amendments related to tier 3 motor vehicle emission and fuel standards, nonroad engine and equipment programs, and marpol annex vi implementation. This standard provides the basic test procedure for evaluating the performance of a. Motordoc llc provides electrical machinery, electrical reliability and industrialcommercial consulting and training as well as the first continuous monitoring electrical and current signature analysis system and esa data collection systems. Verify operation of machine space heater, if applicable. Megger guide to electrical insulation testing pdf instrumart. Pump testing procedure this procedure will also cover testing that determines if the system is safe to operate.
In practice, as you will see in the test methods described below, you. Methods a thermometer method b temperature detector. Testing can be conducted without interrupting the normal operation of the motor, and in fact should be performed when. Visual inspection and electrical testing of the armature and fields give the maintenance personnel an understanding of the condition of the motor. Dc motor analysis pdma a leader in electric motor testing. Rtd circuits shall be in accordance with system design intent and machine protection device.
These conditions result in a decrease in the surfacetosurface contact area with an associated increase in surfacetosurface contact resistance, ultimately causing excessive heating at the junction. Upon completion of this project, the neta technical committee began work on a maintenance document, and maintenance testing specifications for electrical power equipment and systems was published in 1975. Mce static offline tester, emax dynamic online tester and mcemax combination offlineonline tester. Regularly scheduled diagnostics and thorough troubleshooting. All safety materials and equipment warning signs, barricades, fire extinguisher, etc. The following sections of the ansineta standard for acceptance testing specifications for. That is, the motor shall not be dismantled to remove sealing elements. Pdf this paper describes a set of tests carried out on an induction motor for a 75 kw escalator. For instance, test equipment such as flukes 438ii power quality and motor analyzer uses algorithms to analyze not only threephase power quality but also torque, efficiency and speed to determine system performance and detect overloaded conditions, eliminating the need for motor load sensors.
Section 7 of the ansineta standard for acceptance testing specifications for electrical power equipment and systems may be reproduced and used on a cut and paste basis for the particular type of equipment to be tested. Pdf electrical motor testing station with electromagnetic load. The established documentation for the elimination and control of hazards is henceforth referred to as electrical safety procedure. Induction motor performance testing with an inverter power supply. In the running configuration, the windings are joined with metal jumpers.
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