by s3m4ng4t | 10:30 pm

Simple Electrical Troubleshooting Techniques to Learn If You’re An Electrician As an electrician, you are expected to encounter a lot of electrical circuits and drives that will malfunction when they age. In time, you will turn to be a master in the repair of the mentioned devices. But while you are yet approaching for that time, it is recommended that you learn first the basic troubleshooting tips and techniques for such 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. As is usually the case, the said damages on electrical devices are caused by the rectifier section, so it makes sense for an electrician like you to develop understanding on transistors, insulated gate bipolar transistors, diodes, and silicone controlled rectifiers. Talking of AC drives, the most popular used are the pulse width modulated inverter drives. What happens is that the AC line voltage is turned into a DC and then built again into a variable frequency. Change in frequency can cause changes in the motor speed. In order to maintain the motor torque, the volts-to-frequency ration is set at a constant.
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Now, what do you need to do in order to fix a problematic motor drive? What makes this kind of problem much easier to settle and fix is the idea that most failures start and lie in the power sections and not in the circuit boards. The ordinary plant maintenance technician will not so much be exposed to drive failures which is why mastering in repairing circuit boards may not be easy to attain. 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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Always keep in mind that a good troubleshooter isolates the section that is not passing the signal first, and then work on it. In addition to that, safety must be given first and top priority when it comes to troubleshooting a dead VFD with speed and utmost efficiency. There can be charges remaining in the capacitors even when they have been plugged out.

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