What faults may occur because of poor maintenance of induction motor?
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What faults may occur because of poor maintenance of induction motor?
Effects of such faults in induction motor result in unbalanced stator currents and voltages, oscillations in torque, reduction in efficiency and torque, overheating, and excessive vibration [11]. Moreover, these motor faults can increase the magnitude of certain harmonic components of currents and voltages.
What causes a 3 phase motor to fail?
Single phasing, a voltage unbalance that causes a three-phase motor to only run on two phases, can also result in motor failure. Our Solution: Motor overload, short cycling, and electrical supply issues can be fixed by installing Yaskawa’s variable frequency drive (VFD).
What causes a 3 phase motor to overheat?
Bearing failure, overload, insulation breakdown, environmental contamination, improper input power, can all be reasons for early failure. If the motor has gotten to a certain heat the insulation in the stator windings will be irreparably damaged.
How do you maintain a 3 phase motor?
The maintenance program for every five/six months:
- Clean motor thoroughly, blowing out dirt from windings, and wipe commutator and brushes.
- Check brushes and replace any that are more than half worn.
- Examine brush holders, and clean them if dirty.
- Drain, wash out and replace oil in sleeve bearings.
What are the faults in induction motor?
The main types of external faults experienced by an induction motor are over-loading, single phasing, unbalanced supply voltage, locked rotor, phase reversal, ground faults, and under/over voltage.
Which factors affecting preventive maintenance schedule?
The main factors to take into account are:
- Number of machines and equipment.
- Failure rate.
- Average cost for the maintenance of a machine (it depends a lot on the procedures and on task distribution)
- Staff quality.
- Some equipment do not apply to preventive maintenance due to the failure rate distribution.
What would cause a three phase motor to overload and how would you troubleshoot it?
Three phase induction motors are one of the most popular electric motors commonly found in processing plants or any manufacturing concern. They are used in situations where large power is required….How to Troubleshoot 3 Phase AC Motors.
| Motor Problem | Cause | Remedy |
|---|---|---|
| Motor fails to start | Overload Trips | Check and reset overload in starter |
What is the disadvantage of preventive maintenance of 3 phase induction motor?
Disadvantages of Three Phase Induction Motor 3-phase induction motors have poor starting torque and high inrush currents (about 4 to 8 times of the rated current). They always operate under lagging power factor and during light loads, they operate at very worst power factor (about 0.3 to 0.5 lagging).
How do you do maintenance on a motor?
7 Ways to Ensure Better Maintenance of Electric Motors
- Perform Visual Inspections.
- Perform a Brush and Commutator Inspection.
- Conduct a Motor Winding Test.
- Check the Bearings.
- Perform Vibration Tests.
- Use Infrared Thermography in Predictive Maintenance.
- Document Everything.
What are the risks of main maintenance operations?
Maintenance operations typically include both disassembly and reassembly, often involving complicated machinery. This can be associated with a greater risk of human error, increasing the accident risk.
What happens if you don’t maintain your motors properly?
Without a proper maintenance schedule when something goes wrong with a motor you could be looking at, expensive repairs, buying a new motor, taking equipment out of service resulting in down time for a production line.
What should I do before starting any type of motor maintenance?
The very first thing that you should do before starting any type of maintenance on a motor is a visual inspection, a lot of times the trouble can be found just by looking, because if the problem is that bad then it should be very obvious by observation.
What happens if there is a lack of maintenance?
Lack of maintenance or inadequate maintenance can lead to dangerous situations, accidents and health problems. Maintenance is a high-risk activity with some of the hazards resulting from the nature of the work. Maintenance workers are more likely than other employees to be exposed to various hazards.