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have you ever wondered what happens to a
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three-phase motor when the voltage drops
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can it survive or will it burn out let's
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break it down in a simple way a
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well-designed motor circuit is supposed
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to have under voltage protection which
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should prevent damage but what if that
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protection fails that's where things can
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get dangerous heavy load Motors like
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compressors and pumps if a motor has a
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heavy mechanical load like a compressor
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it'll try to compensate for the lower
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voltage by drawing more current the
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problem that extra current causes the
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windings to overheat the insulation to
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break down and in many cases the motor
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to burn out light load Motors like fans
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on the other hand if the motor is
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lightly loaded like a fan it might
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handle small voltage drop without major
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issues but if the voltage drop is too
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big the motor will still overheat and
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eventually fail severe voltage drop no
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motor is safe if the voltage drop is
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severe no matter the load the motor
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loses torque might stall and will
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overheat and that's a recipe for failure
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okay but what if the under voltage
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protection doesn't work that can happen
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for a few reasons bad installation and
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settings if the relay settings are wrong
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or the protection isn't properly
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installed it won't trip when it should
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poor maintenance loose or corroded
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connections aging components these
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issues can stop the relay from detecting
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voltage drops properly external factors
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things like power fluctuations sudden
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load surges or even electrical noise
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from other equipment can interfere with
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the protection system so how do we
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prevent voltage drop from damaging our
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Motors make sure under voltage
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protection is set up correctly monitor
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voltage levels regularly use properly
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sized cables to minimize voltage drop
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install an AVR automatic voltage
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regulator if needed and of course
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perform regular maintenance to keep
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everything in check voltage drop might
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seem like a minor issue but if you don't
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take it seriously it can cause the motor
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to burn out and even lead to an entire
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system shut down so check your
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protection monitor your voltage and keep
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your motor safe if you found this useful
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don't forget to like and share see you
