Jindal Steel and Power Senior Electrical Engineer Interview Questions and Answers

AC drives in steel industries control the speed and torque of motors, improving efficiency and reducing energy consumption.

• AC drives regulate the speed and torque of motors used in various processes in steel industries.

• They help in achieving precise control over the production process, leading to improved efficiency.

• AC drives also help in reducing energy consumption and operational costs in steel plants.

• Examples of app...read more

ABB DCS is a distributed control system used in industrial automation, with various cards and servers for operation.

• ABB DCS stands for ABB Distributed Control System, used in industries for automation.

• The system consists of various cards for different functions such as input/output, communication, etc.

• Servers are used to host the software and manage the communication between different components of the system.

• Example: ...read more

Slip ring motor has external connections for rotor winding while 3 phase induction motor has a squirrel cage rotor.

• Slip ring motor has external connections for rotor winding, allowing for external control of rotor circuit.

• 3 phase induction motor has a squirrel cage rotor, which is simpler and more rugged.

• Slip ring motor is used in applications where variable speed control is required, such as cranes and hoists.

• 3 phase ...read more

An overload relay works by monitoring the current flowing through a motor and tripping when the current exceeds a set limit.

• Monitors the current flowing through a motor

• Trips and interrupts power when current exceeds a set limit

• Protects the motor from damage due to overloading

• Can be reset manually after tripping

Insulation resistance is measured using a megohmmeter to apply a high voltage and measure the resistance of the insulation material.

• Use a megohmmeter to apply a high voltage to the insulation material

• Measure the resistance of the insulation material to determine its insulation resistance

• Insulation resistance is typically measured in megaohms (MΩ)

• Regular insulation resistance testing helps prevent electrical failures an

Electrical safety can be ensured by following proper procedures, using appropriate equipment, and staying vigilant.

• Always use insulated tools when working on live circuits

• Ensure circuits are de-energized before working on them

• Wear appropriate personal protective equipment (PPE) such as gloves and goggles

• Regularly inspect and maintain electrical equipment to prevent malfunctions

• Follow safety guidelines and procedures ou

Preventive maintenance on a motor involves inspecting, cleaning, lubricating, and testing the motor to ensure optimal performance and prevent breakdowns.

• Inspect the motor for any signs of wear or damage

• Clean the motor and its components to remove dirt and debris

• Lubricate moving parts to reduce friction and wear

• Test the motor's performance using appropriate tools and equipment

• Replace any worn out parts or components as

To succeed in an interview, it is important to prepare thoroughly, practice common interview questions, research the company, dress professionally, and demonstrate enthusiasm and confidence.

• Thoroughly research the company and the position you are applying for

• Practice common interview questions and prepare examples of your skills and experiences

• Dress professionally and appropriately for the interview

• Demonstrate enthusia...read more

A star-delta starter is used to reduce the starting current of a motor by initially connecting the motor windings in a star configuration and then switching to a delta configuration.

• The motor windings are initially connected in a star configuration during starting to reduce the starting current.

• After a certain period, the windings are switched to a delta configuration to achieve full speed and torque.

• This transition fr...read more

Undervoltage faults occur when the voltage in a system drops below the normal operating level, leading to potential equipment damage or malfunction.

• Undervoltage faults can be caused by issues such as power supply fluctuations, equipment failures, or overloaded circuits.

• These faults can lead to equipment damage, reduced efficiency, or complete shutdown of systems.

• Examples include a power surge causing a drop in voltage,...read more

Overvoltage faults are electrical faults that occur when the voltage in a circuit exceeds the normal operating range.

• Overvoltage faults can damage electrical components and equipment.

• They can be caused by lightning strikes, power surges, or faulty equipment.

• Protective devices like surge protectors and voltage regulators can help prevent overvoltage faults.

• Examples include a power surge from a lightning strike damaging ...read more

A thermal relay is used to protect electrical circuits from overloads by monitoring the temperature of the circuit and tripping when it exceeds a certain threshold.

• Monitors the temperature of the electrical circuit

• Trips and disconnects the circuit when temperature exceeds a set limit

• Protects against overloads and overheating

• Commonly used in motor protection applications

An RDOL starter is a type of reduced voltage starter used in electrical systems to reduce the starting current and torque of a motor.

• RDOL stands for Reduced Direct Online starter.

• It is used to start induction motors in a controlled manner.

• RDOL starters reduce the voltage supplied to the motor during starting to limit the inrush current.

• This helps in reducing mechanical stress on the motor and connected equipment.

• Common...read more

Improving power factor helps in reducing energy losses, increasing system efficiency, and reducing electricity costs.

• Improving power factor reduces the amount of reactive power flowing in the system, which in turn reduces energy losses.

• Higher power factor means more efficient use of electricity and less strain on the electrical system.

• Improving power factor can lead to reduced electricity costs for consumers and utilit...read more

Buccholz relay is a protective device used in oil-filled transformers to detect faults such as internal arcing or overheating.

• Buccholz relay is installed in the oil pipe connecting the transformer tank and conservator tank.

• It works based on the principle that gas is generated when a fault occurs in the transformer, causing oil level to drop and gas to accumulate in the relay.

• The relay consists of two float switches - o...read more

DP in Siemens communication stands for Distributed Peripherals.

• DP is a communication protocol used by Siemens for connecting distributed peripherals to a central control system.

• It allows for real-time data exchange between the peripherals and the control system.

• DP is commonly used in industrial automation applications.

• Examples of DP communication modules include DP/DP couplers and DP slaves.

To communicate S7 PLC and ABB drive using Profibus, you need to configure the Profibus network, set up the communication parameters, and establish the communication link.

• Configure the Profibus network by setting the correct baud rate, address, and other network parameters.

• Set up the communication parameters on both the S7 PLC and ABB drive to ensure they are compatible with each other.

• Establish the communication link b...read more