Hiranmaye Energy Interview Questions and Answers

Various ways of distribution transformer protection include overcurrent protection, differential protection, and earth fault protection.

• Overcurrent protection involves the use of fuses or circuit breakers to protect the transformer from excessive current.

• Differential protection compares the current entering and leaving the transformer to detect any internal faults.

• Earth fault protection detects any fault between the tr...read more

Buckley relay is a protective relay used in power systems to detect faults and prevent damage to equipment.

• It is a type of directional overcurrent relay.

• It operates based on the principle of phase comparison.

• It is used to protect generators, transformers, and transmission lines.

• It is named after its inventor, W. H. Buckley.

• It is commonly used in high voltage power systems.

The size of dog conductor depends on the current carrying capacity and the voltage rating of the electrical system.

• The size of the dog conductor is determined by the electrical load it needs to carry.

• The current carrying capacity of the conductor is directly proportional to its size.

• The voltage rating of the electrical system also plays a role in determining the size of the conductor.

• For example, a 20-ampere circuit re...read more

Earthing is the process of connecting the metallic parts of an electrical appliance to the earth plate.

• Plate Earthing

• Pipe Earthing

• Rod Earthing

• Strip Earthing

• Earthing through Water Mains

• Earthing through Earth Electrodes

• Earthing through Foundation

• Plate Earthing with Pipe

• Chemical Earthing

Pipe earthing is done by connecting the pipe to a copper electrode buried in the ground.

• Select a suitable location for the copper electrode

• Dig a hole and insert the copper electrode into it

• Connect the pipe to the copper electrode using a copper wire

• Ensure that the connection is tight and secure

• Cover the hole with soil and water it to ensure good contact between the electrode and the soil