Sidvin Core-Tech Electrical Design Engineer Interview Questions and Answers

To check IR of XLPE cable, use a megger to measure insulation resistance.

• Use a megger to measure insulation resistance of XLPE cable

• Ensure the cable is de-energized before testing

• Compare the measured IR value with the manufacturer's specifications

• Repeat the test at different points along the cable for accuracy

Tests for transformers include turns ratio test, insulation resistance test, power factor test, and winding resistance test.

• Turns ratio test measures the turns ratio between primary and secondary windings.

• Insulation resistance test checks the insulation resistance of the transformer windings.

• Power factor test evaluates the power factor of the transformer.

• Winding resistance test measures the resistance of the transforme

Types of excavations include trench excavation, basement excavation, road excavation, and pit excavation.

• Trench excavation involves digging a narrow channel in the ground for laying pipes or cables.

• Basement excavation is the process of digging out the foundation of a building to create a below-ground level.

• Road excavation is the removal of soil and rocks to construct or repair roads.

• Pit excavation involves digging a la...read more