Basics of industrial electricity and troubleshooting electrical control circuits 4 day code. Logical circuits andseries circuit orparallel circuit compound and complex circuits not circuit basic electrical principles. Motor contactor or starter coils are typically designated by the letter m in ladder logic diagrams. About 70% of the time is spent working, handson, at a troubleshooting station with motor control circuits. 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. Basic troubleshooting strategies all about circuits. Basic wiring for motor control technical data guide electrical.
Troubleshooting three basic hardwired control circuits used in. A special type of overcurrent protection device used commonly in motor control circuits is the overload heater. Abb offers protection against shortcircuits, phase failures and. Motor control circuits motor control circuits are an effective way to reduce cost by using smaller wire and reducedamperage. Low voltage control power, usually 24 to 30 vac andor vdc between phases and possibly to ground, usually negative is connected to ground. Electrical motor control circuits free download for windows. To indicate static switching control, use the symbols shown in this table, enclosing them in a diamond as shown. The control circuit consists of relays, relay contacts, contactors, timers, counters, etc. This simple troubleshooting technique is applicable to a wide variety of electrical, electronic, and other types of systems. Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. Troubleshooting control circuits simutech multimedia.
The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from. Dec 09, 2015 control circuits can be divided into two major types. 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. Electrical troubleshooting an electrical motor control circuit. Pdf lesson 1 troubleshooting with electrical schematics.
Online electrical troubleshooting training course tpc training. The lab manual can be accessed via the software and you can also optionally print it out for a hard copy. Troubleshooting an open circuit faults in the control circuit. Figure 1 is a typical wiring diagram for a threephase magnetic motor starter. All trademarks, registered trademarks, product names and company names or logos mentioned herein are the property of their respective owners. How to do electrical troubleshooting of electrical motor. These devices are connected in series with the motor conductors, and heat up slightly under normal current conditions. Electrical troubleshooting of an electrical motor control circuit never work on live circuits unless the proper safety equipment and procedures are in place. Devices that pass power to the motor relays contactors starters.
Explains troubleshooting practices on dc and ac motors, identifying unmarked leads on threephase delta and yconnected motors. Motor and motor control troubleshooting techniques. A good example of this type of control is the singlephase manual starter shown in figure 3 1. Wiring diagrams show the connections to the controller, while line diagrams show circuits of.
Motor control circuits ladder logic electronics textbook. Failure of this pump will result in the loss of a generator currently producing half of the stations power output. As the name suggests, a starter is an electrical device which controls the electrical power for starting a motor. Describe the basic methods of starting a threephase ac motor using full or reduced voltage. Therefore, motor troubleshooting involves the entire system, not just the. The electrical troubleshooting online electrical training course covers use of schematic diagrams, determining sequence of operation, and use of building diagrams and singleline diagrams. Troubleshooting control circuits tcc is the second simulation in our series. 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. 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. 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. A twowire control circuit can be a simple switch that makes or breaks connection to a motor figure 18 1. This electrical troubleshooting training course uses electrical troubleshooting training simulator train and test troubleshooting electrical. These electrical devices are also used for the purpose of stopping, reversing and protecting electric motors.
Apply a systematic approach to troubleshooting 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. Control circuits can also be configured or programed in the plcs. Eymc timed agenda \ syllabus time subject break day 4 8. Troubleshooting three basic hardwired control circuits used. Switching mode power supplies, stepper motors, copiers and fax. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. Introduction global leader in industrial control devices. Learn more about our course for troubleshooting motor control circuits, which utilizes controller simulator software to educate your company on motor control circuits. 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. Pdf troubleshooting electrical motor control circuits pdf.
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. 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. Possible to print the page to a pdf file or from your printer. The motor circuit is easy to identify with the troubleshooting techniques learned. 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. 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 included 32 page electrical troubleshooting pdf lab manual also provides more introduction to troubleshooting control circuits.
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. Electrical troubleshooting in seven steps efficient plant. No part of this wiring manual may be reproduced in any form. They are an ideal means for troubleshooting a circuit. 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. Describe the basic operation of a threephase ac motor.
Motor controls troubleshooting of electric motors relay. It requires you to follow specific and systematic procedures. Troubleshooting electrical control circuits industrial wiki. These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. Basic electrical troubleshooting a boiler feed pump being powered by two 3500 hp inducti on motors appears to be developing a problem. Interpret this ac motor control circuit diagram, explaining the meaning of each symbol. 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. The software used in this video can be purchased here. Electrical motor control circuits is a product developed by business industrial network. It also includes instructions on how to use the tstrainer. Electrical symbols, words, and line diagrams provide the information necessary to understand the operation of motor control circuits.
Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in the driven machinery. Electrical troubleshooting, plc troubleshooting training. Static switching control static switching control is a method of switching electrical circuits without the use of contacts, primarily by solid state devices. There is, however, a potential hazard to doing this. 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. Motor protection and control manual motor starters, contactors and. Introduction motor starters are one of the major inventions for motor control applications. Gather up any background material you may have on hand and then use your senses to inspect the site.
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. Includes maintenance procedures for control circuits and combination starters. This is a basic course, without any prerequisites, that. Basics of industrial electricity and troubleshooting. Abb motor protection and control short form catalog 11.
The tstrainer is a multimedia computerbased training module design to instruct the user in proper control trouble shooting techniques. Troubleshooting an electrical motor control circuit shut off the power to a circuit before performing any work on it. This electrical training course will present the theory of control operation and the proper techniques for diagramming motor control circuits. Ac motor control circuits this worksheet and all related files. Troubleshooting motor circuits tmc is simutech multimedias third troubleshooting simulation. 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. L1 l2 run m1 to 3phase motor power source m1 ol ol. Practical troubleshooting of electrical equipment and control. This simulation explores an industrial garage door circuit. This site is not directly affiliated with business industrial network. Operators are complaining that a large compressor on several occasions has failed to start. Troubleshooting three basic hardwired control circuits used in starting electric motor photo credit. Control circuit and motor troubleshooting flashcards quizlet.
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