STS Infracon Site Engineer Interview Questions and Answers

Ten delta test is used to detect winding deformation in transformers. Maximum value of dissipation factor of transformer bushing is typically 0.5.

• Ten delta test is a diagnostic test used to detect winding deformation in transformers.

• It involves injecting a current into the transformer windings and measuring the voltage response.

• The test is repeated ten times to ensure accuracy and consistency.

• The maximum value of dissi...read more

Catenary conductor is a system of overhead wires used to supply electricity to electric trains, while contact conductor is a system of overhead wires used for power supply to trams and trolleybuses.

• Catenary conductor is used for electric trains, while contact conductor is used for trams and trolleybuses.

• Catenary conductor is typically suspended from a catenary mast, while contact conductor is supported by a contact wir...read more

Earthing of TSS, SP, SSP is essential for safety and proper functioning of electrical systems.

• Earthing helps in dissipating fault currents safely into the ground.

• It provides protection against electric shocks and equipment damage.

• Proper earthing reduces the risk of fire hazards in electrical installations.

• Earthing systems should have low impedance to ensure effective grounding.

• Examples of earthing systems include rod e