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What happens if one leg in a 3 phase synchronous motor fails does it reverse its rotation?
No it does not reverse rotation. If the proper motor protection is used on the motor, the motor should trip off line. Loosing a leg will drive the other two legs of the motor into a higher than normal state. This higher current will be sensed by the overload protection and the motor contactor will drop out. This opening of the motor contactor will drop the supply to the motor and the motor will stop.
To reverse a three phase motor, reverse any two feed wires to the motor. This is usually done at the motor's junction box to preserve the wire colour coding of the wires through out the system.
AnswerDo you really mean a 'phase' or do you mean a 'line'? This is an example of where the use of correct terminology is important. 'Losing a phase' means losing one of the machine's three field windings, whereas 'losing a line' means losing one of the three supply conductors. Two completely different situations for a delta-connected machine.
For example, for delta-connected field windings, the three-phase supply is maintained and the machine assumes an 'open delta' condition, whereas losing a line places two windings in series and in parallel with the third, across a single-phase supply.
What else can I help you with?
What happens if a megger test fails?
If a megger test fails you have a short between the two wires or the wire to ground that you are testing. This short circuit has to be repaired before the equipment is placed back into service.
When a shunt generator fails to build up the voltage then how to rectify the fault?
It fails to build up because self excited DC motor's armature have only one direction of rotation. So that if the poles of the armature are reversed, then this causes the reduction in the residual magnetism and eventually, it will stop.
Reverse running of three phase meter?
The reverse running of a three phase meter is possible when one of the meter's two potential coils fails. This is a problem found typically on a Delta service. A three phase meter in this condition is damaged and will report lower energy use than actual.
What happens to the potential difference of a bulb that burns out in series circuit?
The whole circuit fails - because the action of the bulb blowing cuts the circuit.
What happens when a start capacitor fails?
An open circuit, by definition, has no continuity, therefore there is no current flow. A failed capacitor in an open circuit would have absolutely no effect.
What happen if a prime mover fails when two generators are in parallel?
It acts as synchronous motor by consuming power from the other generator....
What happens when MBR fails?
When MBR fails then the operating system will not load.
If a bank that holds your mortgage fails what happens to that mortgage?
See http://www.fivecentnickel.com/2008/09/22/what-happens-to-your-mortgage-if-your-bank-fails/
What happens if the integumentary fails?
you would die
What happens when the network fails on the computer?
Try it
What happens if the bladder fails?
You will have to go to a doctor.
What happens to your body if your system fails?
If your digestive system fails you will suffer and possibly die from malnutrition.
What happens if interpositional reconstruction fails?
When interpositional reconstruction fails, total joint replacement may be necessary
What happens to the body of the digestive system fails?
You die.
What happens if the embryo fails to implant?
That's a miscarriage.
What happens when the module goes out on the 1988 Chevrolet celebrity?
What happens depends greatly on which module fails. If the engine control module (computer) fails it may cause the engine to run poorly or not at all. If the ignition module fails the engine won't start.
What happens when your liver fails?
you die a slow and painful death!!
