Dell EMC Junior Engineer Electrical Interview Questions and Answers

A Single Line Diagram (SLD) is a simplified representation of a 33/11 Kv substation.

• SLD shows the electrical components and connections in a substation

• It includes transformers, circuit breakers, busbars, and other equipment

• Lines are drawn to represent the flow of electricity between components

• Symbols and labels are used to indicate the type and rating of each component

• Example: A 33/11 Kv substation SLD may show a 33 Kv...read more

To erect an 8MVA power transformer, follow these steps:

• Prepare the site by leveling the ground and ensuring proper drainage

• Install the transformer foundation and anchor bolts

• Position the transformer on the foundation using a crane

• Connect the transformer to the high voltage and low voltage cables

• Perform insulation resistance tests and verify connections

• Fill the transformer with insulating oil and perform oil tests

• Energi

Power transformers are used in high voltage transmission systems, while distribution transformers are used in low voltage distribution networks.

• Power transformers are designed for high voltage transmission systems, typically above 33 kV.

• Distribution transformers are used in low voltage distribution networks, typically below 33 kV.

• Power transformers are larger in size and have higher power ratings compared to distributi...read more