Interested to Buy Any Domain ? << Click Here >> for more details...
HOW DISTANCE PROTECTION IS DONE IN EHV TRANSMISSION LINES?
WHAT IS THE BASIC TECHNIQ OR FUNDA USED BEHIND THIS ?
SPECIALLY EXPLAIN?IMPEDANCE METHOD.
- 2 Answers
- 7292 Views
- ABB, I also Faced
- E-Mail Answers
Answer Posted / krishna rao vutukuru
distance protection can be done in 3 ways by measuring
1)impedance method(impedance relay)
2)reactance method(reactance relay)
3)admittance method(mho relay)
reactance relay used for detection of earth faults(since it is indepedant of ground resistance)
mho relay is used for protection of long transmisson lines(since it is less affected by power swings)
impedance relay is used for protection of medium lenghth transmisson lines.
| Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
what shoud be strength and weakness to impress interviewer????????
What is electrical diversity factor in electrical installations?
How the frame size of a flange mounted AC induction motor is calculated?
How can we decide cable size from HT panel to Transformer? Please give you reply with some examples.
What willbe change in programming when we use 5/3 solenoid inplace of 5/2 in operating of a cylinder?
Difference between low impedance and high impedance Restricted Earth Fault
what is excitation/
what is the pre charge circuit,what will be work which function it will be use plz tell me
what is mean by PIR in circuitbreaker and give me detail of that?
Why do we use copper cable for HT Supply and why not Aluminium?
What are the major reasons for balancing hydro-thermal mix?
what are the advantages and disadvantages of oil filled cables over XLPE cables
What is the previous name of Cox's Bazar
Explain the iniluencc of short circuit ratio on the pert'orniancc of synchronous machine.
how to set the time in digital timer ?
