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Induction motor works on the principle of electromagnetic induction to convert electrical energy into mechanical energy.
The stator of the motor produces a rotating magnetic field
The rotor is made up of conductive bars which are short-circuited at both ends
The rotating magnetic field induces a current in the rotor bars, which in turn produces a magnetic field
The interaction between the stator and rotor magnetic fields c...
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
Ohm's law is represented by the equation I = V/R, where I is the current, V is the voltage, and R is the resistance.
It applies to conductors that are linear and have a constant temperature.
It is named after Georg Simon Ohm, a German physicist.
Ohm's law is used extensively in electrical ...
The principle of induction motor is based on the interaction between the magnetic field of the stator and the rotor.
Induction motor works on the principle of electromagnetic induction
The stator winding produces a rotating magnetic field
The rotor winding is short-circuited and the magnetic field induces a current in it, which in turn produces a magnetic field
The interaction between the two magnetic fields causes the rot...
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I applied via Whatsapp and was interviewed in May 2024. There were 2 interview rounds.
The minimum megger value of a good motor is typically 1 megohm or higher.
A good motor should have a megger value of at least 1 megohm to ensure proper insulation resistance.
Lower megger values may indicate insulation issues or potential breakdowns in the motor.
Regular megger testing is important to detect any insulation problems in motors.
For high voltage motors, the minimum megger value may be higher than 1 megohm.
The kVA transformer installed in the plant is 500 kVA.
The kVA transformer installed in the plant is 500 kVA.
The kVA rating of the transformer is crucial for determining the power capacity of the plant.
It is important to regularly check and maintain the transformer to ensure optimal performance.
The kVA rating indicates the maximum load that the transformer can handle without overheating.
I applied via Whatsapp and was interviewed in May 2024. There were 2 interview rounds.
The minimum megger value of a good motor is typically 1 megohm or higher.
A good motor should have a megger value of at least 1 megohm to ensure proper insulation resistance.
Lower megger values may indicate insulation issues or potential breakdowns in the motor.
Regular megger testing is important to detect any insulation problems in motors.
For high voltage motors, the minimum megger value may be higher than 1 megohm.
The kVA transformer installed in the plant is 500 kVA.
The kVA transformer installed in the plant is 500 kVA.
The kVA rating of the transformer is crucial for determining the power capacity of the plant.
It is important to regularly check and maintain the transformer to ensure optimal performance.
The kVA rating indicates the maximum load that the transformer can handle without overheating.
posted on 4 Feb 2024
I was interviewed before Feb 2023.
I was interviewed in Sep 2023.
posted on 8 May 2022
I applied via Referral and was interviewed in Nov 2021. There were 4 interview rounds.
Self thinking releated
posted on 17 Nov 2019
I applied via Company Website and was interviewed in Nov 2019. There were 4 interview rounds.
The maximum voltage of transmission line in India is 765 kV.
The highest voltage level in India is 765 kV.
This voltage level is used for long distance transmission of electricity.
India has several high voltage transmission lines, including the Raigarh-Pugalur HVDC line.
The maximum voltage level has increased over the years, from 400 kV to 765 kV.
Higher voltage levels allow for more efficient transmission of electricity.
Various methods like V/F control, rotor resistance control, and vector control are used for speed control of induction motors.
V/F control method varies the frequency and voltage supplied to the motor to control its speed.
Rotor resistance control method involves inserting external resistance in the rotor circuit to control the speed.
Vector control method uses advanced algorithms to control the speed and torque of the mo...
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