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I applied via Walk-in and was interviewed before Mar 2023. There was 1 interview round.
Star delta starter is a method used to reduce the starting current of induction motors.
Star delta starter is used for starting induction motors in applications where the starting current needs to be limited.
In star connection, the motor windings are connected in a star configuration during starting to reduce the voltage across each winding.
After a certain time, the windings are switched to a delta configuration to run ...
Motor current formulas can be found using basic electrical principles and motor specifications.
Use Ohm's Law (I = V / R) to calculate current based on voltage and resistance.
For AC motors, use the formula I = P / (sqrt(3) * V * cos(theta)), where P is power, V is voltage, and theta is the power factor angle.
Refer to motor datasheets for specific current ratings and calculations.
Consider factors like efficiency, power f...
Protection in a transformer involves measures to prevent damage from overcurrent, overvoltage, and overheating.
Use fuses or circuit breakers to protect against overcurrent
Install surge arresters to protect against overvoltage
Use temperature sensors and cooling systems to prevent overheating
Implement differential protection to detect internal faults
Regular maintenance and testing to ensure proper functioning
Faults in a transformer can include short circuits, open circuits, overheating, and insulation breakdown.
Short circuits can occur due to insulation failure or winding damage.
Open circuits can result from broken connections or faulty windings.
Overheating may be caused by overloading or poor cooling.
Insulation breakdown can lead to arcing and short circuits.
I applied via Walk-in and was interviewed in Jul 2021. There was 1 interview round.
posted on 29 Mar 2024
I applied via Walk-in and was interviewed before Mar 2023. There were 4 interview rounds.
Basic appti ques were asked
Transformer types include step-up, step-down, isolation, autotransformer, and instrument transformer.
Step-up transformer increases voltage while decreasing current
Step-down transformer decreases voltage while increasing current
Isolation transformer separates primary and secondary windings
Autotransformer has a single winding with multiple taps for voltage adjustment
Instrument transformer is used for measuring current or
Motors are devices that convert electrical energy into mechanical energy. There are various types of motors.
DC motors: used in appliances, toys, and automobiles
AC motors: used in industrial machinery and household appliances
Stepper motors: used in robotics and automation
Servo motors: used in precision control applications
Brushless motors: used in drones and electric vehicles
posted on 17 Feb 2023
I applied via Other and was interviewed in Apr 2020. There were 4 interview rounds.
I applied via Walk-in and was interviewed before Sep 2021. There were 3 interview rounds.
based on 1 interview
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