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. A flashing light indicates the problem is most likely in the. Jan 03, 2016 troubleshooting examples in the above sections, various basic and complex control circuits for a threephase motor have been dealt with. Troubleshooting a variable frequency drive newsletter introduction in many industrial and commercial plants, automation of any process and associated control relies heavily on motors and adjustable speed drives. Operating from 3 v to 40 v frequency operation to 100 khz active current limiting description the mc34063ae series is a monolithic control. An electrician is troubleshooting a faulty light circuit, where the power source and light bulb are far removed from one another. If internal fault is indicated again, and flame sensor is not shorted. Electrical troubleshooting 3 measuring voltage drop observe the circuit above. First make sure the problem is not something simple such as an unplugged device or a. Here, you will troubleshoot a more complex control circuit consisting of numerous relays, switches, lights, and solenoids. Question 3 the following batteryswitchlamp circuit has a problem.
Troubleshooting motor circuits tmc is simutech multimedias third troubleshooting simulation. Lp management services offers a control circuit training course, which focuses on functions, measurement. Download basic electrical control circuits freeware. L3 % t3 t three wires three wjfes lead from the plot devtce to thestarter. Although the content is geared towards control circuits, the. There are three types and most include thermal protection. Introduction to pneumatics and pneumatic circuit problems for. Industrial maintenance troubleshooting industrial controls. We invite readers of this manual to send us their tips, feedback, and. Over time, corrosion has developed between the wire end and the screw terminal labeled 4 on the upper side of the top terminal block. Electrical troubleshooting, plc troubleshooting training. After reconnecting the field circuit to the ccr, or reinstalling the s1 and turning the primary power back on to the regulator, begin by.
Control of pressure after an air receiver tank is necessary so that an actuator receives a steady pressure source without wasting. Control circuit and motor troubleshooting flashcards quizlet. Practical troubleshooting of electrical equipment and control. This document provides installation and static checkout instructions. Troubleshoot an electrical circuit or system following a logical procedure. You will still have a switch, but no electrical protection. Fortunately, electrical circuit troubleshooting is an activity that works well for small groups of students to engage in as well as individual students. Work handson with our latest fault training panels. Unit 1 basic principles of motor controls different manufacturers of control devices, as well as books about motor controls, use different methods of showing the control circuit wiring. Controlalarm circuit board power if the green power status indicators are not illuminated. 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. Start studying control circuit and motor troubleshooting. In theory and design of electrical and electronic circuits you can find primarily.
Troubleshooting electric motor control circuits wiring fault simulation troubleshooting electric motor control circuits wiring fault simulation this awardwinning electrical training program builds on the basic techniques program. Eymc timed agenda \ syllabus time subject break day 2 8. Generators and transformers dc power sources and voltmeter measuring dc volts series circuit parallel circuit ac generators. Your professionals will learn to diagnose and repair multiple faults, honing their skill at troubleshooting motor circuits. Aug 25, 2017 eugenio maximo tait is the author of theory and design of electrical and electronic circuits. Control of pressure is required after the compressor as a safety for the system. Online electrical troubleshooting training course tpc training. Basics of industrial electricity and troubleshooting electrical. The lab manual can be accessed via the software and you can also optionally print it out for a hard copy.
Certificate of completion all materials and supplies. Troubleshooting examples in the above sections, various basic and complex control circuits for a threephase motor have been dealt with. Troubleshooting is the process that determines the cause of the problem in the electronic circuit by examining the affected area of it, and then by taking appropriate action. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Be sure that parts with positive or negative markings are positioned as shown in the drawings. How the circuit works this section describes how the garage door circuit works with the help of an animated tutorial. The electrical troubleshooting online electrical training course covers use of schematic diagrams, determining sequence of operation, and use of building diagrams and singleline diagrams. Some of this information may be available from the plc or dcs or other. This course is designed for anyone requiring an understanding of electricity. If youre troubleshooting a refrigeration control system and dont have a factory schematic, be patient, trace the controls out wire by wire, and draw a careful schematic. How to do electrical troubleshooting of electrical motor control circuit.
Check to see if the incoming controlalarm power is present at tb11 and tb12. Check to see if the incoming control alarm power is present at tb11 and tb12. Most circuit problems are due to incorrect assembly, always double check that your circuit exactly matches the drawing for it. Ac voltage source tb1 tb2 tb5 tb4 tb6 tb3 light as you can see in the diagram, there are several terminal blocks tb through which electrical power is routed to the light bulb. Basics of industrial electricity and troubleshooting electrical control circuits 4 day code. The emphasis is on practical issues that go beyond typical electrical principles, providing a toolkit of skills in solving electrical problems, ranging from. The included 32 page electrical troubleshooting pdf lab manual also provides more introduction to troubleshooting control circuits. From the 1980s to the late 2000s a circuit breaker has been provided with the windlass.
If voltage is present and fuse is not blown, please call factory for assistance. Control of pressure pressure in a pneumatic system must be controlled at two points after the compressor and after the air receiver tank. By the time youre about halfway done, the way the system works will start to make sense, and the rest of the circuit will seem easier to trace out. To indicate static switching control, use the symbols shown in this table, enclosing them in a diamond as shown. It requires you to follow specific and systematic procedures. Magnetic contactors, like manual starters and disconnect switches, are rated according to the size and type of load. Explains troubleshooting practices on dc and ac motors, identifying unmarked leads on threephase delta and yconnected motors. Learn how to effectively diagnose electrical control circuit problems. This simulation explores an industrial garage door circuit. About 70% of the time is spent working, handson, at a troubleshooting station with motor control circuits.
For example, in figure b1, the control wiring from the startstop pushbutton. Be sure that all connections are securely fastened. Integrated circuit can now output variety of pulse widths to the transistors on the hbridge. Check to see if the fuses on the circuit board are blown. Sometimes the only way to test a circuit is to see how the system reacts to a manual input. This product teaches proven techniques for troubleshooting control circuits.
Ac adjustable speed drives asd have become the most popular variable speed control devices used in. Includes maintenance procedures for control circuits and combination starters. Practical troubleshooting of electrical equipment and control circuits will help engineers and technicians to identify, prevent and fix common electrical equipment and control circuits. This is a basic course, without any prerequisites, that. Troubleshooting control circuits tcc is the second simulation in our series. A virtual troubleshooting exercise such as this one is a good way to start students thinking in the right ways to becoming effective troubleshooters. Troubleshooting the basic windlass system schaefer marine. With a 12 volt power source connected to the load, the meter should read a voltage drop equal to the source voltage or 12 volts.
Troubleshooting electrical control circuits is defined as the logical and orderly process to determine the fault or faults in an electrical control circuit. Troubleshooting control circuits simutech multimedia. This awardwinning, electrical training program builds on the basic techniques program. Systematic methodology is the key to quickly and effectively troubleshooting. Troubleshooting electrical control circuits industrial wiki odesie. Troubleshooting electrical control circuits industrial wiki. This combination of potentiometer, integrated circuit and pwm to the hbridge is the key to speed control. The green wire from the variable speed motor labeled dehum connects to g on the furnace control if it was previously connected to g on the old style furnace control board.
Although the content is geared towards control circuits, the techniques for. Solenoids, timers, sensors, relays, troubleshooting, even an introduction to plcs is included. First make sure the problem is not something simple such as an unplugged device or a tripped circuit breaker. Effective troubleshooting skills will significantly reduce the length of an outage, however, effective.
Static switching control static switching control is a method of switching electrical circuits without the use of contacts, primarily by solid state devices. Basics of industrial electricity and troubleshooting electrical control. Basic circuit troubleshooting worksheet basic electricity. The following is an example of troubleshooting a control circuit. Enhance your troubleshooting training with hours of handson learning and practice to develop and maintain control circuit troubleshooting skills.
Troubleshooting control circuits free version download for pc. Short circuit testing i for short circuit testing, connect the output terminals of current control panel to s and m1 or m2 terminals of release. White rodgers 50a55 troubleshooting manual pdf download. For minor problems, troubleshooting requires a little knowledge about the circuit and its components working because it involves checking the connections only. Consider the control circuit for a threephase motor with a dol starter with a maintainedcontact control as shown in figure 7. This electric motor control circuit training software is quite detailed. This manual is written in accordance with sae j2008. Guided troubleshooting this section guides you through the troubleshooting process on three typical faults. These circuit breakers are obsolete and the entire panel must be replaced. This kind of noise can get into logic circuit ground or into the processor power supply and scramble the program. To make sure, interrupt line or 24 volt thermostat power for a few seconds. Troubleshooting an open circuit faults in the control circuit. You may want to check out more software, such as troubleshooting motor controls, aknm circuit magic or circuit diagram, which might be related to troubleshooting control circuits. Basics of industrial electricity and troubleshooting.
These manuals are specifically made up for the individual panel, and are generally sufficient for any or all problems which may be encountered. Build typical sensor, relay and coil circuits and then diagnose faults. Control alarm circuit board power if the green power status indicators are not illuminated. The test leads are connected in parallel across the circuit load. Introduction to pneumatics and pneumatic circuit problems. Electric motors present some special problems from the standpoint of control. Introduction to troubleshooting control circuits youtube.
A feature to reduce a refrigeration circuits cooling capacity by bypassing hot discharge line refrigerant directly to the evaporator coil of the system to more effectively operate in low load conditions. M1 and m2 magnetic threshold are of the order breaker. This video uses electrical troubleshooting simulation software to teach you how to troubleshoot an electrical motor. Electronic circuits pdf is a great book for electronic circuits enthusiasts who are keen to learn electronic and electrical circuit. Here, you will troubleshoot a motor control circuit consisting of a reversing motor controlled garage door. Jun 08, 2009 if youre troubleshooting a refrigeration control system and dont have a factory schematic, be patient, trace the controls out wire by wire, and draw a careful schematic. It also includes instructions on how to use the tstrainer. The rm7800rm7840 is a solid state replacement for the electromechanical r4140 automatic programming control. Undervoltage protection and threewrre control should brmg to mrnd a startstop push button staton whrch the most common means of provrdrng this type control. Dcdc converter control circuits datasheet production data features output switch current in excess of 1.
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