How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?

OCL,

What is differential relay? How it operates?

. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply

What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?

Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient?

What should be the minimum and maximum ohmic value for earthing?

As per the theory current doesn’t flows in Neutral, but practically it is not applicable, explain why?

What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

How to take the Vector Group Test in Transformer? What is the purpose of doing Vector Group Test?

Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV,20kV, 30kV?

Bhel,

Why do we generate 3 Phase AC Supply? It is possible to generate 4 Phase and 5 Phase explain it?

Explain why the Voltage drop will happen in 3 Phase line?