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VFD has various control modes like V/F control, vector control, sensorless vector control, torque control, etc.
V/F control is the most basic control mode
Vector control provides better speed and torque control
Sensorless vector control eliminates the need for an encoder
Torque control is used for applications that require precise torque control
Other control modes include open-loop control, closed-loop control, etc.
Copper or aluminum conductors are used in 132KV transmission lines for their high conductivity and low resistance.
Copper and aluminum are the most commonly used conductors.
Copper has higher conductivity but is more expensive than aluminum.
Aluminum has lower conductivity but is lighter and cheaper than copper.
The choice of conductor depends on factors such as cost, weight, and transmission distance.
Other factors such as...
GRR does not directly affect RPM. RPM is controlled by the motor's power supply and load.
GRR (Gear Ratio Range) affects torque and speed of the motor, not RPM
RPM is controlled by the power supply and load on the motor
Increasing the voltage of the power supply can increase RPM
Decreasing the load on the motor can increase RPM
GRR can indirectly affect RPM by changing the torque and speed of the motor
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I was interviewed in Sep 2024.
posted on 25 Sep 2024
I applied via campus placement at National Institute of Technology (NIT), Silchar and was interviewed in Aug 2024. There were 3 interview rounds.
Quantitative aptitude
The switch shown in the image is a toggle switch.
The switch has a lever that can be moved up and down to turn it on or off.
Toggle switches are commonly used in electronic devices and appliances.
Examples of toggle switches include light switches and power switches on electronic devices.
In t years, I see myself as a senior electrical engineer leading innovative projects and mentoring junior engineers.
Continuing to develop my technical skills and knowledge in the field of electrical engineering
Taking on more leadership roles within projects and teams
Mentoring and guiding junior engineers to help them grow in their careers
Contributing to the development of cutting-edge technologies and solutions
Possibly...
I want to join Hitachi Energy because of their innovative solutions and global impact in the energy sector.
Hitachi Energy is a leader in providing sustainable energy solutions
I am impressed by Hitachi Energy's commitment to innovation and technology advancement
I believe my skills and experience align well with the opportunities at Hitachi Energy
I am excited about the chance to work on cutting-edge projects and contribu
I applied via Company Website and was interviewed in Aug 2024. There was 1 interview round.
My area of expertise is in power systems and renewable energy.
Specialize in designing and analyzing power systems
Experience with renewable energy sources such as solar and wind power
Knowledge of grid integration and energy storage technologies
I manage my team by setting clear goals, providing support and resources, fostering open communication, and recognizing achievements.
Set clear goals and expectations for team members
Provide necessary support and resources for team to succeed
Foster open communication and encourage collaboration
Recognize and reward team achievements
Delegate tasks effectively based on team members' strengths and skills
I applied via Walk-in and was interviewed in Jul 2023. There were 6 interview rounds.
LOTO stands for Lockout/Tagout, a safety procedure used to ensure that dangerous machines are properly shut off and not started up again prior to the completion of maintenance or servicing work.
LOTO involves locking the energy isolating devices with an assigned individual lock and tag to prevent the machine from being turned on.
Types of LOTO include electrical LOTO, mechanical LOTO, and pneumatic LOTO.
Examples of LOTO ...
Normal discussion with seniors
posted on 5 Feb 2024
Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction.
Transformers are used to step up or step down voltage levels in electrical power transmission and distribution systems.
They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.
The primary winding is connected to the input voltage s...
It was very easy ,duration 45 min for 30 questions
Assistant Engineer
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Junior Engineer
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HR Officer
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Engineer
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