The Must-Know Electrical Troubleshooting Techniques for All Electricians Being an electrician, you could only look forward to coming across with a wide variety of complicated electrical circuits and drivers which will later break down and malfunction. In time, you will turn to be a master in the repair of the mentioned devices. But now that you are yet a starter, it is an ideal thing to know of some practical measures to solve those problems. Kindly read on to get started. Nowadays, the solid-state electronic AC motor drive has become really common inside industrial plants. It can control a wide array of electrical devices like mixers, pumps, machine tools, conveyors, chillers and also air handlers. Even more, it has the capability to controlling a large set of other electrical devices that were originally powered by DC or designed to run in a constant speed. Because the rectifier section is most of the times the cause of such device failutres, it is necessary for you to develop understanding on diodes, transistors, silicone controlled rectifiers and insulated gate bipolar transistors. The pulse width modulated inverter drives are among the most popular kinds of AC drives today. What happens is that the AC line voltage is turned into a DC and then built again into a variable frequency. The motor speed is most of the times dependant on the changing of frequency. The motor torque is then maintained by keeping into constant ration the volts-to-frequency.
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Now, what does it take for you to troubleshoot a motor drive? Because most of the failures in the power section and not in the circuit boards, that will not be so difficult to fix. If you are a plant maintenance technician, you are not likely to experience a great number of problematic instances that have something to do with the circuit boards, which is the reason why mastering such may be difficult. A methodical approach has to be utilized in order to effectively and successful repair a troubled variable frequency drive or VFD. If you know that you only possess limited knowledge about the device, then you put into use the method taught in many technical schools – divide-and-conquer.
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You have to bear in mind that an excellent troubleshooter is one who sets aside first the section or box that is not passing then signal, and once done, begins on the work. Another very essential thing that you need to keep in mind is that a good electrician who looks forward to repairing a dead VFD quickly and efficiently takes into account the different safety measures that have to be used before, during and even after the troubleshooting process. Even when capacitors are unplugged, they can retain dangerous charge that are harmful.