Explain the reasons for the burning of the motor winding
It could be due to any of the following reasons:
1.Overloading
2.Jam Bearing
3.Low voltage
4.Single or two phase running
5.Foreign object
6.Weak insulation
7.Wearing and tearing
8.Over voltage.
9.Protection failure.
10.Mechanical failure.
If a phase fails, the two-phase tries to carry the load hence the current increases then there will be probably a burnt motor winding within an interval. This is the most dominant cause of motor winding burning. If it is not detected in time, most certainly the motor will burn. Also, a bad CB or blown fuse can cause a phase failure.
Bad bearing: when bearing is bad you hear a sharp noise that happens during load or on no-load. They can last for days and months before they cause burn to the motor winding.
How to prevent the motor from burning up during function?
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Electrical overload can be avoided by installing effective overcurrent protection, which detects overcurrent and interrupts the supply.
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Regularly monitor the insulation for signs of wear and replace it before low resistance causes failure.
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It is vital that the motor remain as cool as possible; keeping the operating environment cool, if feasible, will assist prevent problems.
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Contamination may be prevented rather easily. Keep work locations, equipment, & fixtures as clean as possible to reduce the risk of contaminants entering the motor. Also, when arranging the workplace, try to keep motors away from grinding equipment, which emit high amounts of pollutants.
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Motors should be inspected for vibration on a regular basis, utilizing a motor analysis tool such as the low-cost SKF CMDT Plug & Play machine condition indicator or Dynamic Motor Analyzer. To reduce vibration, put the motor on a level, sturdy surface. If vibration persists, look for evidence of wear, such as loose bearings (or) misalignment. If the cause of the vibration cannot be discovered, consider visiting an expert.