KP Green Energy Interview Questions, Process, and Tips

Q1. What's the name of oil used in power transformer,which type of elements used in transformer oil.
Ans. 
The oil used in power transformers is called transformer oil. It typically contains elements such as carbon, hydrogen, and oxygen.
• Transformer oil is typically mineral oil-based, such as naphthenic or paraffinic oil.

• Elements found in transformer oil include carbon, hydrogen, and oxygen.

• Other elements like sulfur may also be present in transformer oil.
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Q2. What's SF6 circuit breaker . And Testing of power transformer
Ans. 
SF6 circuit breaker is a type of circuit breaker that uses sulfur hexafluoride gas as the insulating and arc extinguishing medium. Testing of power transformers involves various electrical tests to ensure proper functioning.
• SF6 circuit breaker uses SF6 gas for insulation and arc extinguishing

• Testing of power transformers includes insulation resistance test, turns ratio test, and power factor test

• SF6 circuit breakers ar...read more
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Q3. What's NGR briefly explain and With its advantages.
Ans. 
NGR stands for Neutral Grounding Resistor. It limits fault current and protects equipment.
• Limits fault current during ground faults

• Protects equipment from damage

• Improves safety by reducing risk of electric shock

• Commonly used in power distribution systems

• Example: NGR is used in transformer neutral grounding to limit fault current
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Q4. How many types of Testing for Isolator.
Ans. 
There are three main types of testing for isolators: mechanical testing, electrical testing, and functional testing.
• Mechanical testing involves checking the physical components of the isolator such as the contacts, insulators, and operating mechanism.

• Electrical testing includes measuring the insulation resistance, contact resistance, and dielectric strength of the isolator.

• Functional testing verifies that the isolator ...read more
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Q5. What's Mesh earthing.
Ans. 
Mesh earthing is a type of grounding system where multiple interconnected conductors are buried in the ground to provide a low impedance path for fault currents.
• Mesh earthing involves burying multiple interconnected conductors in the ground.

• It provides a low impedance path for fault currents to safely dissipate into the ground.

• This type of grounding system is commonly used in electrical installations to protect against
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