Switching mode power supplies, stepper motors, copiers and fax. About 70% of the time is spent working, handson, at a troubleshooting station with motor control circuits. Motor protection and control manual motor starters, contactors and. Troubleshooting an electrical motor control circuit shut off the power to a circuit before performing any work on it. Apply a systematic approach to troubleshooting motor control circuits. How to do electrical troubleshooting of electrical motor. 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. Abb motor protection and control short form catalog 11. L1 l2 run m1 to 3phase motor power source m1 ol ol.
Describe the basic methods of starting a threephase ac motor using full or reduced voltage. A good example of this type of control is the singlephase manual starter shown in figure 3 1. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Electrical troubleshooting in seven steps efficient plant. Explains troubleshooting practices on dc and ac motors, identifying unmarked leads on threephase delta and yconnected motors. As the name suggests, a starter is an electrical device which controls the electrical power for starting a motor. The electrical troubleshooting online electrical training course covers use of schematic diagrams, determining sequence of operation, and use of building diagrams and singleline diagrams. About our troubleshooting motor control circuits course. 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. Ac motor control circuits this worksheet and all related files. Failure of this pump will result in the loss of a generator currently producing half of the stations power output. The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from.
Possible to print the page to a pdf file or from your printer. Troubleshooting an open circuit faults in the control circuit. Static switching control static switching control is a method of switching electrical circuits without the use of contacts, primarily by solid state devices. 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. 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. Electrical motor control circuits free download for windows. Control circuits can also be configured or programed in the plcs. 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. Interpret this ac motor control circuit diagram, explaining the meaning of each symbol. Operators are complaining that a large compressor on several occasions has failed to start. Dec 09, 2015 control circuits can be divided into two major types. Troubleshooting three basic hardwired control circuits used in.
Eymc timed agenda \ syllabus time subject break day 4 8. Basic troubleshooting strategies all about circuits. This is a basic course, without any prerequisites, that. It requires you to follow specific and systematic procedures. Basics of industrial electricity and troubleshooting electrical control circuits 4 day code. Motor control circuits motor control circuits are an effective way to reduce cost by using smaller wire and reducedamperage. Electrical troubleshooting an electrical motor control circuit. The control circuit consists of relays, relay contacts, contactors, timers, counters, etc. Learn more about our course for troubleshooting motor control circuits, which utilizes controller simulator software to educate your company on motor control circuits. Practical troubleshooting of electrical equipment and control. The lab manual can be accessed via the software and you can also optionally print it out for a hard copy. Online electrical troubleshooting training course tpc training.
Troubleshooting electrical control circuits industrial wiki. Control circuit and motor troubleshooting flashcards quizlet. This electrical training course will present the theory of control operation and the proper techniques for diagramming motor control circuits. Troubleshooting electrical control circuits is defined as the logical and orderly process to determine the fault or faults in an electrical control circuit. Motor controls troubleshooting of electric motors relay. 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. Figure 1 is a typical wiring diagram for a threephase magnetic motor starter. Low voltage control power, usually 24 to 30 vac andor vdc between phases and possibly to ground, usually negative is connected to ground.
Devices that pass power to the motor relays contactors starters. Pdf lesson 1 troubleshooting with electrical schematics. Electrical motor control circuits is a product developed by business industrial network. The tstrainer is a multimedia computerbased training module design to instruct the user in proper control trouble shooting techniques. Introduction global leader in industrial control devices. Abb offers protection against shortcircuits, phase failures and. A special type of overcurrent protection device used commonly in motor control circuits is the overload heater. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. These electrical devices are also used for the purpose of stopping, reversing and protecting electric motors. Troubleshooting three basic hardwired control circuits used.
These devices are connected in series with the motor conductors, and heat up slightly under normal current conditions. All trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners. Pdf troubleshooting electrical motor control circuits pdf. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in the driven machinery. Troubleshooting three basic hardwired control circuits used in starting electric motor photo credit. No part of this wiring manual may be reproduced in any form. Logical circuits andseries circuit orparallel circuit compound and complex circuits not circuit basic electrical principles. Basics of industrial electricity and troubleshooting. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. Continuous motor operation with a momentary start switch is possible if a normallyopen sealin contact from the contactor is connected in parallel with the start switch so that once the contactor is energized it. Wiring diagrams show the connections to the controller, while line diagrams show circuits of. Includes maintenance procedures for control circuits and combination starters. 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. The motor circuit is easy to identify with the troubleshooting techniques learned.
Troubleshooting control circuits tcc is the second simulation in our series. Therefore, motor troubleshooting involves the entire system, not just the. Troubleshooting control circuits simutech multimedia. Motor control circuits ladder logic electronics textbook.
Basic wiring for motor control technical data guide electrical. Electrical troubleshooting of an electrical motor control circuit never work on live circuits unless the proper safety equipment and procedures are in place. Electrical troubleshooting, plc troubleshooting training. The motor control section has two functions, it first takes single phase 120v or 240vac power and converts it to dc the motor can operate at either of these ac voltages simply by adding or removing a jumper on the 5 pin connector in the motor control section. It also includes instructions on how to use the tstrainer. A twowire control circuit can be a simple switch that makes or breaks connection to a motor figure 18 1. 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. There is, however, a potential hazard to doing this. To indicate static switching control, use the symbols shown in this table, enclosing them in a diamond as shown. Gather up any background material you may have on hand and then use your senses to inspect the site.
Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. This is done, using ladder logic diagram, statement lists, or control flowcharts software, by representing the logical conditions, sequences, and interlocks required for operating equipment or a machine in an automatic sequence. This site is not directly affiliated with business industrial network. 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. They are an ideal means for troubleshooting a circuit. Motor contactor or starter coils are typically designated by the letter m in ladder logic diagrams. This simple troubleshooting technique is applicable to a wide variety of electrical, electronic, and other types of systems. This electrical troubleshooting training course uses electrical troubleshooting training simulator train and test troubleshooting electrical.
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. Practical troubleshooting of electrical equipment and control circuits by mark brown, jawahar rawtani, dinesh patil there is a large gap between what you learn in college and the practical knowhow demanded in the working environment, running and maintaining electrical equipment and control circuits. Electrical symbols, words, and line diagrams provide the information necessary to understand the operation of motor control circuits. This simulation explores an industrial garage door circuit. Basic electrical troubleshooting a boiler feed pump being powered by two 3500 hp inducti on motors appears to be developing a problem. Motor and motor control troubleshooting techniques. Introduction motor starters are one of the major inventions for motor control applications.
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. 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. The software used in this video can be purchased here.
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