Is there any device for finding out fault in an electricity line of 11000 kvA?

Question

Is there any device for finding out any kind of fault in an electricity line of 11000 kva?

Is there any device for finding out any kind of fault in an electricity line of 11000 kva extending from 0 kilometers to 300 kilometers??

Answer 1

It's called a........wait for it...............a breaker. Breakers trip on under voltage, under frequency, high current, etc. and are designed to trip before conditions damage the line, the transformers, etc. Breakers also ideally selectively trip, meaning breakers closer to the load will trip sooner, hopefully isolating the fault to as small of an area as possible. When the fault happens on a major transmission line though, there is often little that can be done till its fixed, unless it is part of a ring that circles an area and power can be routed from the other side of the ring.

Answer 2

I guess that the line is not faulted at the moment, you are wanting to find a fault if it happens. Relays that do "two ended negative sequence impedance method" of fault location are about the most accurate. Check out the web site below, I don't know if they ship outside the US but they have the best relays on the market.

www.selinc.com

Answer 3

Available fault current at a given location is
a calculation that begins with the impedance
of the generator(s) and is carried to the point
of interest.
The utility will provide the current data at your
service point on request.