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The EM technician role over the last couple years has led each of
The EM technician role over the last couple years has led each of

... Firstly, it is VERY IMPORTANT to note that no EM technician is required to work on vessel power related problems nor is the technician responsible for vessel power wiring. These duties are the role of the skipper, crew member or person appointed by the owner or skipper (for example a marine electric ...
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... primary is the secondary impedance times the turns ratio squared. When the tube is shorted, the primary sees zero impedance and huge currents flow. To prevent this, a parallel leg is added to the magnetic circuit with an air gap. When the secondary (load) is shorted, no flux will go through the leg ...


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... 60 Hz noise in the system. To check this, change the triggering source to line. This will cause the scope to trigger on the power line signal which is 60 Hz. If the noisy signal stabilizes, this means you have 60 Hz noise problems. Check your ground to ensure that your system has a ground and the sc ...
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Presentation
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Ground loop (electricity)

In an electrical system, a ground loop is an equipment and wiring configuration which results in excessive unwanted current in a conductor connecting two points that are supposed to be at the same electric potential, often ground, but are actually at different potentials.Ground loops are a major cause of noise, hum, and interference in audio, video, and computer systems. They do not in themselves create an electric shock hazard, the inappropriate connections merely create a not necessarily very good instance of Electrical_bonding, which is explicitly required by safety regulations in certain circumstances. In any case the voltage difference between the ground terminals of each item of equipment is small. A severe risk of electric shock occurs when equipment grounds are improperly removed in an attempt to cure the problems thought to be caused by ground loops.
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