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hey there ever had a three-phase motor
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that just won't stop tripping the
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breaker super frustrating right but
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don't worry I've got you covered today
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we're going to break down the most
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common reasons why this happens and how
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to figure out what's causing it let's
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jump in overload condition all right
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first up overload this basically means
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the motor is working too hard maybe it's
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got too much load on it where the
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voltage is lower than it should be so
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it's pulling extra current either way
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the circuit breaker is doing its job
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shutting things down before the motor
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overheats short circuit next we've got
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short circuits these are a big deal if
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two wires touch or the insulation breaks
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down boom instant surge of current the
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breaker trips right away to prevent
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serious damage or even fire phase loss
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single phasing a three-phase motor needs
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all three phases to run smoothly if one
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is missing maybe because of a blown fuse
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a loose connection or a bad contactor
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the motor tries to make up for it by
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pulling extra current and that that
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leads straight to overheating and a
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tripped breaker ground fault this
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happens when electricity leaks to the
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ground often because of damaged
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insulation or moisture the breaker
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senses this and trips to prevent shocks
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or equipment damage if your motor is old
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or exposed to a damp environment this
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could be your culprit locked rotor
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jammed motor imagine trying to start a
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car with the parking brake on if the
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motor shaft is stuck maybe due to seized
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bearings or a jammed load it'll pull a
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huge amount of current and you guessed
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it the breaker shuts it down for safety
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circuit breaker issues and hey sometimes
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the problem isn't even the motor a weak
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old or undersized breaker might be
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tripping when it really shouldn't so
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always keep that in mind too how to
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figure out what's causing a three-phase
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motor to trip the circuit breaker
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checking for overload first thing grab a
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clamp meter and check how much current
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compare it with the rating on the name
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plate if it's running too high you might
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need to reduce the load or check for low
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voltage looking for a short circuit turn
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off the power and take a look at the
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wiring if you see burn marks melted
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insulation or smell something burnt
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that's a red flag a quick test with a
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multimeter can confirm if there's a
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short between phases detecting phase
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loss use a Multimeter to check voltage
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on all three phases if one is missing
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check uses connections and the contactor
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fixing this early can save the motor
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from serious damage testing for ground
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faults a mear insulation tester is your
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best friend here if it shows low
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resistance between the windings and the
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motor body there's leakage that means
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you've got an insulation problem that
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needs fixing checking for a locked rotor
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try turning the motor shaft by hand if
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it doesn't move you might have seized
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bearings or a jammed load solve the
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mechanical issue first before resetting
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the breaker inspecting the circuit
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breaker if the motor seems fine but it's
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still tripping the breaker itself might
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be the problem swap it with a properly
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rated one and see if that fixes the
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issue and there you have it if your
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three-phase motor is tripping now you
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know exactly what to check if this video
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helped hit that like button subscribe
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and ring the bell for more
