The required fuse is a 5amp, fastacting 5 mm x 20 mm fuse. Some standard lincoln electric motors are also capable of pws, yds or both as indicated in the following chart. First of all, measure the armature current with the dc ammeter to see if the motor is. Noise and vibration noise indicates motor problems but ordinarily does not cause damage. Motor protection and control manual motor starters, contactors and. Therefore, motor troubleshooting involves the entire system, not. Gather up any background material you may have on hand and then use your senses to inspect the site. Electrical motor control circuits free download for. Troubleshooting motor circuits tmc is simutech multimedias third troubleshooting simulation. How to troubleshoot an electric motor capacitor problem. Mechanical problems rather than electrical ones are usually the cause.
A laptop computer with plc programming, communication, and operating programs are a necessary tool in todays modern plant. This electric motor control circuit training software is quite detailed. All trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners. This workshop focuses on the main issues of troubleshooting electrical equipment and control circuits of today to enable you to walk onto your plant or facility to troubleshoot and fix problems as quickly as possible. It is mechanical component defect and electrical circuit failure. How to do electrical troubleshooting of electrical motor control circuit. Check for faulty leads, connections and transformers. You can also use a process of elimination to isolate and diagnose control circuit problems. Threephase motor and drive system and common problems. This simulation explores an industrial garage door circuit.
List and explain a systematic approach to troubleshooting electrical circuits. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Motor will not run at all if the motor will not run at all, make the following checks. How to do electrical troubleshooting of electrical motor. This article describes ac electrical motor troubleshooting. Troubleshooting the mini lathe variable speed drive.
The following system components require periodic maintenance. Troubleshooting of electrical motor control circuit. A damaged or burnt out capacitor may hold only a fraction of the energy needed for the motor if its capacitance is low. The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from. A bad motor capacitor may cause starting problems or could shut off the motor while running. Specifi c topics have been organized into sections for modular instruction. Electric motor system diagnostics richard scott alltest pro, llc. Industrial maintenance troubleshooting industrial controls. Troubleshooting detects many electrical and mechanical issues o incoming power analysis including harmonics. These instruments are used to measure voltage,current. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. Troubleshooting problems on your ac motor is relatively straightforward, and providing you. Interpret this ac motor control circuit diagram, explaining the meaning of each symbol. This industryleading resource begins with electric motor principles, power requirements, and control methods and focuses on the safe operation.
This textworkbook provides a framework for acquiring the technical knowledge and applied skills needed by maintenance electricians and those in related electrical. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Check that there is power to the receptacle from which the lathe is powered. How to troubleshoot a 3phase electric motor hunker. Troubleshooting electric motors presents learners with a practical approach to troubleshooting motors and equipment in electrical systems. At the end is just an example how our software uses real world workorder system to track student while doing electrical troubleshooting with our simulation software, and the detailed analysis report.
Troubleshooting a plc motor starter with jogging circuit. Test and inspect motor inspect electrical connections to the motor. Load out of balance direct drive application remove the motor from load and inspect the motor by itself. Tec provides a rich 3d environment where professionals will learn and. The modern electric motor installation the individual motor drive has practically replaced all other types. Properly installed and maintained lincoln electric polyphase ac induction motors operated within the nameplate ratings will run troublefree for many years. Used together, they create a the same manner as a typical updown pushbutton station. Motor control circuits motor control circuits are an effective way to reduce. Typical instruments used for troubleshooting motor operation problems include a multimeter, clampon meter,insulation resistance meter, and infrared thermometer. Take input voltage to the motor using the volt ohmmeter. This is a basic course, without any prerequisites, that. 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. Shooting and quality control of electric motors, generators, alternators, coils and windings. Check to make sure that all leads are well connected.
Hvac control systems also contain switches and other control devices. Breakdown causes by electric motor failures always happen in our operation due to of 2 major factors. Pdf pdf electrical motor controls for integrated systems. Motor starters are one of the major inventions for motor control applications. Inspect all the electrical connections for proper termination, clearance, mechanical strength, and electrical continuity. Troubleshooting electrical circuits tec is our foundational electrical troubleshooting simulation. Dc motor troubleshooting based on the easa technote troubleshooting dc motors. A load is a component in a circuit that converts electricity into light, heat, or mechanical motion. Troubleshooting scenarios troubleshooting is an important element of any motors and controls course. This site is not directly affiliated with business industrial network. The higher the capacitance of the capacitor the more energy it can store. Unit 1 basic principles of motor controls unit 1introduction this unit discusses the basic concepts of motor control, including motor control language and the types of wiring diagrams used. Troubleshooting in the field motor testing motor controller programmable logic controllers plc within the industrial troubleshooting realm today, electrical troubleshooting also requires great computer skills.
These electrical devices are also used for the purpose of stopping, reversing and protecting electric motors. Check to make sure adequate ac power is available at the control unit use ac voltmeter. This video uses electrical troubleshooting simulation software to teach you how to troubleshoot an electrical motor control circuit. The motor specified voltage must be present on all three phases. Also the pdf laboratory manual comes full of proven. Motor control and troubleshooting rockwell automation. About 70% of the time is spent working, handson, at a troubleshooting station with motor control circuits operating at a safe, low level of 24 volts. Open vent holes and check for a continuous stream of air from the motor. The main electrical components in hvac equipment are fan motors, compressors and devices like gas valves and solenoid valves.
Troubleshooting ecm motors check high voltage at motor pins 4, 5 of five pin connector. An electrical failure of a winding or connection in the motor can cause other windings or the entire motor to overheat. If the motor runs, the problem is in the mechanical drive train. Practical troubleshooting of electrical equipment and. Turn the speed control knob clockwise to start the motor turning. At the end is just an example how our software uses realworld workorder system to track student while doing electrical troubleshooting with our simulation software, and.
Solenoids, timers, sensors, relays, troubleshooting, even an introduction to plcs is included. Introduction global leader in industrial control devices. Electric motor drive installation and troubleshooting. If the motor does not run and the motor overloads trip again, the problem is in the motor bearings. Electric heating r,w1,w2 24vac 0 24vac 0 0 1speed ac, cooling r,yy2,g 0 0 24vac 12vdc 0. List and describe the purpose and application of various motor control components. Within the industrial troubleshooting realm today, electrical troubleshooting also requires great computer skills. Ac motors are generally reliable and last a long time before needing to be replaced. Troubleshooting electrical circuits simutech multimedia. The only userserviceable parts on an ac motor are the brushes and the bearings. The following are the two major components of a starter. Pdf lesson 1 troubleshooting with electrical schematics.
Motor capacitors store electrical energy for the motor to use. Your professionals will learn to diagnose and repair a variety of faults in a simulated electrical circuit consisting of wiring, lights, relays, switches and pushbuttons. Electrical motor control circuits is a product developed by business industrial network. Ac motor using full or reduced voltage describe the basic operation of a threephase ac motor describe methods for troubleshooting ac motors apply a systematic approach to troubleshooting motor control circuits design and construct motor control circuits implement proper motor control troubleshooting techniques. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in. Electric motor drive installation and troubleshooting is designed for technicians in the field responsible for installing, programming, troubleshooting, and retrofitting electric motor drives. Troubleshooting in the field motor testing motor controller programmable logic controllers plc. Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. Motor and motor control troubleshooting techniques. 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. Take a stepbystep approach to analyze motor starting. No matter how urgent the problem and motor failure can cause some very urgent problems always develop a plan of attack before you start repair work. As the name suggests, a starter is an electrical device which controls the electrical power for starting a motor.
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