Su-Kam Power Systems Interview Questions and Answers

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are commonly used to step up or step down voltage in electrical power distribution.

• They consist of two coils of wire, known as the primary and secondary coils, wrapped around a core.

• The primary coil is connected to a source of alternating current, which creates a changing magnetic field...read more

Transformers are classified based on their construction and purpose, such as power transformers, distribution transformers, and instrument transformers.

• Power transformers are used to step up or step down voltage for transmission and distribution of electricity.

• Distribution transformers are used to supply lower voltage to end-users.

• Instrument transformers are used for measuring voltage and current in power systems.

• Other...read more

An inverter is an electronic device that converts direct current (DC) to alternating current (AC).

• Converts DC power to AC power

• Used in solar power systems to convert DC electricity from solar panels to AC electricity for use in homes

• Commonly used in uninterruptible power supplies (UPS) to provide backup power during outages

The type of inverter used is a grid-tied inverter.

• Grid-tied inverters are connected to the utility grid and do not require batteries.

• They convert DC power from solar panels into AC power for use in the home or to be fed back into the grid.

• Examples of grid-tied inverters include string inverters, microinverters, and power optimizers.

Op amp stands for operational amplifier, a type of electronic amplifier with high gain and differential inputs.

• Op amp is a type of amplifier that amplifies the difference in voltage between its two inputs.

• It has a very high open-loop gain, typically around 100,000.

• Op amps are commonly used in signal conditioning, filtering, and mathematical operations in electronic circuits.

• Examples of op amp ICs include the LM741, AD8

Transformer design involves creating efficient and reliable electrical transformers for various applications.

• Consider the desired voltage and current ratings for the transformer

• Select appropriate core and winding materials for optimal performance

• Design the transformer to minimize losses and improve efficiency

• Perform simulations and testing to validate the design

• Iterate on the design to meet specifications and requireme

The sales revenue last year was $2.5 million.

• Sales revenue for last year was $2.5 million.

• It was a 10% increase from the previous year's revenue of $2.3 million.

• The top-selling product contributed 30% of the total revenue.

Approximately 10,000 units were billed last year.

• Approximately 10,000 units were billed last year.

• The exact number of units billed last year was around 10,000.

• There was a total of 10,000 units billed in the previous year.