How can we decide the fualt levels of sub-stations?

Question Posted / hdpathak84

2 Answers
7687 Views
Bhel, Enercon, Prakash Industries, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

How can we decide the fualt levels of sub-stations?..

Answer / akarsh mittal

fault level is given by
I(short circuit)= I(rated)/% impedance
Hence fault level is determined by percentage impedance of a line

Is This Answer Correct ?

13 Yes

0 No

How can we decide the fualt levels of sub-stations?..

Answer / k.prakashchandra

The answer is to be multiplied by 100 i.e. Irated
x100/percentage impedance

Is This Answer Correct ?

9 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

Damping resistor provided in open delta (tartiary) winding of a measuring PT at the incoming of a MV inverter drive panel is getting heated up. Can any body explain the reasons and suggest the remedy?

0 Answers Danieli,

What is difference between Electrical & Electronic Device?

7 Answers AZ Engineering, Vodafone,

What will happen if the rotor of an induction motor is fed from a 3 phase supply and the stator short circuited ?

4 Answers

What is the effect of leading power factor for power transformer & D.G?

7 Answers Exide,

how to calculate the settings for shaft ct protn in hydro generators

0 Answers

how hazordious area is classified at an oil & gas plant and categorise suitable class of electric equipment in that area like induction motors, LCS, Lighting Fixtures Fluerescent/Flood lights Mercury& sodium lights, J.Bs, Power Cables etc

2 Answers

what is the fullform of mccb

10 Answers Thermax,

my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers

how is the testing of an REF relay? what are the test REF circuit having?

0 Answers Siemens,

What is hysteresis losses?

2 Answers GMR,

What is slip in induction motor?

3 Answers

why the generating / transmitting voltage is in the order of multiples of 11(ie 11kv,22kv,33kv......)

1 Answers

For more Electrical Engineering Interview Questions Click Here