L1 l2 run m1 to 3phase motor power source m1 ol ol. Troubleshooting control circuits tcc is the second simulation in our series. Add this electrical motor troubleshooting chart url to your favorites so you can call up on your smart phone to guide you during electrical motor troubleshooting. The motor circuit is easy to identify with the troubleshooting techniques learned. Practical troubleshooting of electrical equipment and. Troubleshooting an open circuit faults in the control. To conduct the tests, break the motor connections and test first in one direction the motor and then in the other the supply. When you get the call, the motor wont start, youd best have a logical and systematic plan in place to approach the problem. Easter egging just doesnt work unless you happen to be very lucky. A particular application must satisfy the needs of the user and comply with applicable codes, laws and standards before using any of the typical circuits shown in this publication.
Motor control circuits motor control circuits are an effective way to reduce cost by using smaller wire and reducedamperage devices to control a motor. Troubleshooting electrical control circuits 3day learn to wire, operate, and troubleshoot a ci. This will effectively identify the resistance to ground of the starter, line circuits to the disconnect, and load lines to the motor and starter windings. About 70% of the time is spent working, handson, at a troubleshooting station with motor control circuits. How to do electrical troubleshooting of electrical motor. Possible to print the page to a pdf file or from your printer. For each of your proposed faults, explain why it will cause the described problem. About our troubleshooting motor control circuits course. Motor controls troubleshooting of electric motors relay. Electrical troubleshooting an electrical motor control circuit. This video uses electrical troubleshooting simulation software to teach you how to troubleshoot an electrical motor control circuit. Having an effective troubleshooting plan and following it can help obtain this feeling of satisfaction. Abb offers protection against shortcircuits, phase failures and overload. Dc motor troubleshooting based on the easa technote troubleshooting dc motors always disconnect the power before handling any parts of the electrical equipment lock out and tag out all electrical circuits test for voltage before touching any components.
Take a stepbystep approach to analyze motor starting problems when troubleshooting a faulty electric motor, time or in this case downtime is money. When you get the call, the motor wont start, youd best have a logical and systematic plan in place. Gather up any background material you may have on hand and then use your senses to inspect the site. Low voltage control power, usually 24 to 30 vac andor vdc between phases and possibly to ground, usually negative is connected to ground. This course focuses on troubleshooting motor control circuits by providing a comprehensive overview of motor control systems and practicing troubleshooting techniques through the use of controller simulator software. This electric motor control circuit training software is quite detailed. Describe the basic methods of starting a threephase ac motor using full or reduced voltage. Motor protection and control manual motor starters, contactors and. These electrical devices are also used for the purpose of stopping, reversing and protecting electric motors. Electrical motor control circuits free download for. Isolating the problem in the shortest amount of time saves costly downtime and maybe even your. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Motor 3ct to 120 v separate control ot is a switch that opens when an overtemperature condition exists type mfo. This will help you determine whether the discrepancy is in the motor or in the line circuit.
Motor control circuits are often connected to lower voltages than the motor they control to make it. Examine the following illustration of a simple batteryswitchlamp circuit, connected together using screwterminal blocks, each connection point on each terminal block identified by a unique number. Jun 18, 2014 learn more about our course for troubleshooting motor control circuits, which utilizes controller simulator software to educate your company on motor control circuits. Select the symbol motor in the pickmenu automation. If youre not sure where to start, start with the power circuits. Refer to the wiring diagram to verify the motor is wired correctly. Plug stop and antiplugging circuits twospeed motor control reduced voltage starting circuits supervisors working on or who oversee employees working on 50v or.
Electrical motor control circuits free download for windows. 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. The finished project contains electrical diagrams, panel mechanical layout and various lists. Practical troubleshooting of electrical equipment and control. The interlock contacts installed in the previous sections motor control circuit work fine, but the motor will run only as long as each push button switch is held down. Troubleshooting three basic hardwired control circuits used in. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. 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. Motor control circuits ladder logic electronics textbook.
This troubleshooting electrical control circuits 3 day course is offered multiple times in a variety of locations and training topics. Motor controls unit 1introduction this unit discusses the basic concepts of motor control, including motor control language and the types of wiring diagrams used. Basics of industrial electricity and troubleshooting electrical control circuits course details. Motor and motor control troubleshooting techniques. Go to page 6 in the project where you will find a page intended for power circuits. Threewire control startstop joginch circuits sequence start and stop automatic sequence starting reversing circuits plug stop and antiplug circuits two speed motor control reduced voltage starting circuits troubleshooting more complex control circuits tank fill control duplex pump control day one. In a motor control circuit, multiple stop buttons for the same motor are connected in.
This workshop shows delegates how to troubleshoot electrical equipment and control circuits. Tutorial motor control o shows you how to make a small control circuit, where all components are found in the component database. The first training module is an introduction to electrical troubleshooting with text and audio narration. The fault could also be many different types, such as, open circuit fault, short circuit fault or a ground fault. Examples of control circuits6 2wire control 6 3wire control 69 shunting thermal units during starting. All trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners. A special type of overcurrent protection device used commonly in motor control circuits is the overload heater. Describe the basic operation of a threephase ac motor. Also the pdf laboratory manual come full of proven wiring assignments that will. Electrical troubleshooting of an electrical motor control circuit never work on live circuits unless the proper safety equipment and procedures are in place.
Plug stop and antiplug circuits two speed motor control reduced voltage starting circuits troubleshooting more complex control circuits tank fill control duplex pump. Take a stepbystep approach to analyze motor starting. Start studying control circuit and motor troubleshooting. If the motor starter line circuits are clear, the problem is on the load side of the starter. The included 32 page electrical troubleshooting pdf lab manual also provides more introduction to troubleshooting control circuits. Your professionals will diagnose and repair a variety of faults in a simulated control circuit consisting of relays, pushbuttons, a control transformer, a solenoid lock, a proximity switch, and circuit protection. Check the source of power, overload, fuses, controls, etc. 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. Apply a systematic approach to troubleshooting motor control circuits. Basics of industrial electricity and troubleshooting electrical control circuits course details date.
There is a chasm between the theory of electron flow, magnetic fields and troubleshooting electrical equipment and control circuits in the plant. As the name suggests, a starter is an electrical device which controls the electrical power for starting a motor. Take a stepbystep approach to analyze motor starting problems. Interpret this ac motor control circuit diagram, explaining the meaning of. If we wanted to keep the motor running even after the operator takes his or her hand off the control switches, we could change the circuit in a couple of. The software used in this video can be purchased here. When using a stepbystep analysis approach to troubleshooting, the first step should be. To indicate static switching control, use the symbols shown in this table, enclosing them in a diamond as shown. 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. An indepth troubleshooting guide to help you with your ac electric motor issues. These devices are connected in series with the motor conductors, and heat up slightly under normal current conditions. By checking the supply voltage, current, and frequency first, you can rule out problems that might affect the motor drive or breaker circuits. 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 the detailed analysis.
Solenoids, timers, sensors, relays, troubleshooting, even an introduction to plcs is included. Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. Troubleshooting an electrical motor control circuit shut off the power to a circuit before performing any work on it. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. Plug stop and antiplugging circuits twospeed motor control.
Oct 05, 2010 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 the detailed analysis report. Troubleshooting motor circuits tmc is simutech multimedias third troubleshooting simulation. The page has been prepared with three phases and pe and n. Troubleshooting motor control circuits course lp management. Troubleshooting of electrical motor control circuit. Once you are familiar with the basic circuit, our electrical training instructor will teach you how to apply these theories to more complex systems so that you can quickly troubleshoot and repair equipment. Abb motor protection and control short form catalog 11. Current is defined as the flow of electrons and is measured in amperes. Troubleshooting an open circuit faults in the control circuit. Troubleshooting three basic hardwired control circuits used in starting electric motor photo credit. In this way you can always check that you have been through all steps. Aug 01, 2005 take a stepbystep approach to analyze motor starting problems when troubleshooting a faulty electric motor, time or in this case downtime is money. Learn more about our course for troubleshooting motor control circuits, which utilizes controller simulator software to educate your company on motor control circuits.
If the motor problems cant be resolved with this list, please contact your supplier for assistance. Wiring diagram book a1 15 b1 b2 16 18 b3 a2 b1 b3 15 supply voltage 16 18 l m h 2 levels b2 l1 f u 1 460 v f u 2. Generally, ac devices can safely operate at not less than two megohms to ground, and dc devices can safely operate at not less than one. The contacts are controlled by a coil in the control circuit the starting relay is only in the circuit for a short period of time the type of motor control device is determined by the. Devices that pass power to the motor relays contactors starters. Sep 09, 2014 there is a chasm between the theory of electron flow, magnetic fields and troubleshooting electrical equipment and control circuits in the plant. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. Faulty motor control equipment can even cause damage to systems and equipment not directly connected to the motor circuit.
Find it and turn it off, then locate any field devices connected to the panel. Would you like to be notified when the next offering is scheduled. This notion was drilled into my head in my early years and has proven itself over and over again. This electrical training course will present the theory of control operation and the proper techniques for diagramming motor control circuits. The contactor main contacts are responsible for allowing or interrupting the flow of current to the motor. If we wanted to keep the motor running even after the operator takes his or her hand off the control switch es, we could change the circuit in a couple of different ways. Every effort has been made in this first edition text troubleshooting scenarios. This simulation explores an industrial garage door circuit. Ac motor control circuits this worksheet and all related files.
Motor control circuits motor control wiring diagrams. Troubleshooting an electrical motor control circuit. All the questions and answers found in this quiz can be found in tom henrys book control circuits. There are three main electrical circuits in a power climber hoist as taught in the electrical for power climber hoist technicians, motor, brake and control circuits. It also includes instructions on how to use the tstrainer. This control circuit operation and troubleshooting program will provide the student with the information needed to troubleshooting and repair control circuits. Electrical motor control circuits is a product developed by business industrial network. This is a basic course, without any prerequisites, that. Determine whether or not voltage should be present between the following pairs of terminal block.
Troubleshooting electrical control circuits is defined as the logical and orderly process to determine the fault or faults in an electrical control circuit. Here are 3 convenient ways to be added to our mailing list. Troubleshooting electrical control circuits industrial wiki. Pdf troubleshooting electrical motor control circuits pdf. Static switching control static switching control is a method of switching electrical circuits without the use of contacts, primarily by solid state devices. This site is not directly affiliated with business industrial network. Click here to join our mailing list please reference motor control circuits. Motor starters are one of the major inventions for motor control applications. Effective troubleshooting skills will significantly reduce the length of an outage, however, effective troubleshooting begins well in advance of an unexpected outage. Troubleshooting control circuits simutech multimedia.
This is the other motor starter circuit, which operates the contactor to turn it on or off. Its usually a dedicated circuit breaker in an electrical power distribution panel or motor control center. It requires you to follow specific and systematic procedures. The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from. Electrical troubleshooting, plc troubleshooting training. To do this, the contacts in the control circuit are either opened or closed. The following is a short discussion concerning basic electrical troubleshooting. Electric motors present some special problems from.
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