0
When the line voltages of a polyphase motor induction motor are not equal, unbalanced currents in the stator windings will result. A small percentage voltage unbalance will result in a much larger percentage current unbalance. Consequently, the temperature rise of the motor operating at a particular load and percentage voltage unbalance will be greater than the motor operating under the same conditions with balanced voltages. NEMA Standards MG 1-1998, 12.46 recommends against operating a motor with a voltage unbalance greater than 1%. This will increase operating temperature, vibration, nuisance trips and failures.
What else can I help you with?
Why flywheel is used in reciprocating compressor not in centrifugal compressor?
Flywheel prevents fluctuation in the speed of the motor as a result of load fluctuation. It stores the energy and dissipates it to the compressor for prolonged period. So the load fluctuation which is high during compression stage and low during other stages during a cycle in reciprocating compressor gets nullified. On the other hand, centrifugal compressor continiously compresses the gas and does not have load fluctuations, hence flywheel is not required.
What are the uses of damper winding s in synchronous motor?
to achive constant speed and provide a eassy way to inter loacking with syn fluxDamper winding is a short circuited winding which are useful in preventing the hunting(momentary) speed fluctuation in alternator and are needed in synchronous motor to provide starting torque.
What are the possible cause that motor compressor trip?
there is a possibility that parts of motor windings has partial damage.
What is hunting in a synchronous motor?
Hunting in a synchronous motor refers to the oscillation or fluctuation in the rotor's position relative to the rotating magnetic field when the motor experiences disturbances, such as changes in load or supply voltage. This phenomenon occurs because the motor tries to maintain synchronism but may overshoot or oscillate around the stable operating point. If not controlled, hunting can lead to mechanical stress and instability in the motor's operation. To mitigate hunting, damping techniques or control systems are often implemented.
Why ac motors are not used in railways?
Ac motor has a low starting torque so that DC series motor used in railways cause DC motor has high starting torque
Why flywheel is used in reciprocating compressor not in centrifugal compressor?
Flywheel prevents fluctuation in the speed of the motor as a result of load fluctuation. It stores the energy and dissipates it to the compressor for prolonged period. So the load fluctuation which is high during compression stage and low during other stages during a cycle in reciprocating compressor gets nullified. On the other hand, centrifugal compressor continiously compresses the gas and does not have load fluctuations, hence flywheel is not required.
Can motor oil on the skin cause cancer?
Yes prolonged contact with motor oil can cause cancer.
What is the suffix to cause to have a motor?
motorize
What neuological diseases cause loss of motor function in arms and legs?
What would cause loss of motor function in upper thighs
What will cause a star delta panel to trip in delta?
On a star delta starter a motor overload or a motor going to ground and cause a short circuit will cause the overload protection to trip. These overloads have to be reset before the motor can be restarted.
What are the uses of damper winding s in synchronous motor?
to achive constant speed and provide a eassy way to inter loacking with syn fluxDamper winding is a short circuited winding which are useful in preventing the hunting(momentary) speed fluctuation in alternator and are needed in synchronous motor to provide starting torque.
Why is electric motor quiet?
Cause they wanna be
What can a bad motor mount cause?
Vibrations,
What do motor cells do?
cause the body to move.
When you wash a motor what cause the motor to shake?
Getting electrical ignition parts wet will cause a misfire that will continue until the water is dried out or evaporates.
The single most common cause of motor vehicle collisions is improper driving.?
true
If defective blower motor draws more current than a good motor because?
defective motor will not run, also cause the blower motor speed resistor to burn out and eventually blow the fuse. a motor with defective bearings will draw excessive current causing either the fuse to blow or cause the motor to overheat
