Offset Values and Transmission Lines

Question is not clear.Are u refering to the line construction or Tower?

a question is addressed to anyone in a site and asks exactly "when offset calculation isnt done in transmission lines."

Google "offset calculation for transmission lines" and you get a lot of hits.

I work with HV transmission lines and you have got to provide much more information as it could mean any number of things. This isn't like asking "what's Ohms law mean to anyone" where the topic specifics and answer are obvious, with the little information given I can think of no specific answer.

If I had to make a guess I would say it was regarding mechanical spacing offsets for overhead strung single HV cables or bundles.

a question is addressed to anyone in a site and asks exactly "when offset calculation isn't done in transmission lines."

For underground HV transmission cables or when the design of the overhead HV transmission pole is such that the spacings of the phases are kept separate.

Do these vague guesses help?

Please provide more information.

i wonder if there is a situation in which we dont have a d.c component of fault current, for example if there is a low x/R ratio (it means low d.c component and thereby we dont need to calculate the d.c offset value of any fault)????.

OR as second guess, is it possible to talk about zero offset current in a fault occuring in a HVDC system??

İn fact the question is as i have mentioned it above,there is not any explanation there.

What i guess is that there is a relation between the faults and x/r value and in a special case we dont need to calculate this d.c component (also this value determines in part the breaking capacity of the devices used in the lines),but i cant find the right answer.

And perhaps it is the point what u mentioned above i dont know, perhaps it is just a matter of laying down the conductors, i will try to find the answer in a near future as soon as possible and i will share it chaps..

Th e points you mentioned are relevent to circuit breaker selectionwhere the DC Offset plays a part.I transmission line particularly the tower line this term has not been used as I know.

Regards

i have found what it was meant, it is of clipping offset....