Section Head Electrical Interview Questions and Answers

Oil filtration should be done at a temperature of around 50-60 degrees Celsius.

• The ideal temperature for oil filtration is between 50-60 degrees Celsius.

• Filtration at higher temperatures can cause the oil to break down and lose its effectiveness.

• Lower temperatures can cause the oil to become too viscous and difficult to filter.

• The specific temperature may vary depending on the type of oil and the filtration equipment being used.

DAR stands for Dielectric Absorption Ratio and it is a measure of insulation quality of power transformer.

• DAR is the ratio of insulation resistance after 60 seconds to the insulation resistance after 30 seconds.

• It is used to determine the condition of the transformer insulation.

• A high DAR value indicates good insulation quality.

• A low DAR value indicates poor insulation quality and may require maintenance or replacement.

• DAR testing is typically done during routine maintenance ...read more

Our control scheme is a combination of PLC and DCS systems.

• We use Programmable Logic Controllers (PLCs) for discrete control and Distributed Control Systems (DCS) for process control.

• Our PLCs are programmed using ladder logic and are responsible for controlling individual components such as motors and valves.

• Our DCS system is used for overall process control and is responsible for monitoring and controlling multiple processes simultaneously.

• We also use Human Machine Interface...read more