Power Grid Corporation of India Substation Engineer Interview Questions and Answers

Q1. What is the role of this position?
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Q2. How many years of experience do you have?
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Q1. Can you tell me about yourself?
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Q2. How many experience in solar filed
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Q1. Expected salary
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Q2. Salary finalization
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Q1. Legal documents
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Q2. Role and responsibilities
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Role and responsibilities

Q1. Tell me about yourself
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Q2. What is the role and responsibilities
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Q1. General idea about substation and protection of grid
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Q2. What are the different types of protections used in 110 kV feeders
Ans. 
Different types of protections used in 110 kV feeders
• Overcurrent protection

• Distance protection

• Differential protection

• Directional overcurrent protection

• Earth fault protection

• Under/overvoltage protection
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Q1. Job related questions
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Q1. HAZOP & HIRA related
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Q1. Explain in detail about Hazardous classification
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Hazardous classification refers to the categorization of substances or environments based on their potential to cause harm or danger.
• Hazardous classification is used to identify and communicate the level of risk associated with different substances or environments.

• It helps in determining the appropriate safety measures and precautions to be taken.

• Classification criteria include factors such as flammability, explosivene...read more
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Q2. Cable Sizing calculation
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Q3. Cable tray Sizing calculation
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Q4. Electrical codes in Lighting design
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Electrical codes play a crucial role in lighting design, ensuring safety, efficiency, and compliance.
• Electrical codes provide guidelines for the installation, wiring, and operation of lighting systems.

• They specify the minimum requirements for electrical components, such as switches, fixtures, and wiring methods.

• Codes address issues like proper grounding, circuit protection, and voltage limitations to prevent electrical...read more
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Q5. Knowledge about software used in the Electrical field
Ans. Dialux Evo, E3D, and AutoCAD, Autogrid Pro
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Q1. Factory act-1948, BOCW ACT
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Q2. LTI, Incident investigation
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Q1. Power distribution relative
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Power distribution is the process of delivering electricity from the source to the end-users.
• Power distribution involves the transmission of electricity from power plants to substations

• Substations then distribute the electricity to transformers, which reduce the voltage for use in homes and businesses

• Power distribution also involves monitoring and maintaining the electrical grid to ensure reliability and safety

• Examples...read more
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Q2. Power distribution question
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Q3. Power distribution and safety
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