Schindler Electrical Engineer Interview Questions and Answers

A motor in electrical engineering is a device that converts electrical energy into mechanical energy.

• Motors are commonly used in various applications such as industrial machinery, household appliances, and electric vehicles.

• There are different types of motors including DC motors, AC motors, and stepper motors.

• Motors consist of a rotor and a stator, with the rotor rotating when electrical current is applied.

• The speed an...read more

VFD stands for Variable Frequency Drive, which is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.

• VFDs are used to control the speed and torque of AC motors in various applications.

• They are commonly used in HVAC systems, industrial pumps, conveyor systems, and machine tools.

• VFDs can help save energy by adjusting motor speed to match the actual load req...read more

Synchronisation process of a plant involves matching the frequency, voltage, and phase angle of the incoming generator with the grid.

• Ensure the generator frequency matches the grid frequency (50Hz or 60Hz).

• Match the voltage levels of the generator with the grid.

• Adjust the phase angle of the generator to synchronize with the grid.

• Use synchronizing equipment like synchroscope or synchronizing lamps to ensure proper synch...read more

Alternator and transformer protection systems are essential for preventing damage and ensuring safe operation.

• Alternator protection systems typically include overcurrent, overvoltage, and reverse power protection to safeguard the alternator from damage.

• Transformer protection systems often involve differential protection, overcurrent protection, and temperature monitoring to prevent overheating and insulation breakdown.

• ...read more