Overhead ground wires(OHGW)
Overhead ground wires(OHGW)
(OP)
I have a 66-kV system where the OHGW for shielding is on a different structure than the phase conductors. This type of configuration is mentioned in IEEE std 1243-1997 section 8.3. The structures are both single steel poles. The poles will be grounded with less than 50 ohms resistance to ground. The soil in the are is very poor 3000 ohm-meters.
How should the two poles be connected?
I am concerned that if I bond the two directly together the ground potential rise, caused by a lighting strike on the OHGW, will cause my phase conductors to flashover.
But, if I don't bond them electricaly the touch potential, on the conductor pole, will be a problem.
How should the two poles be connected?
I am concerned that if I bond the two directly together the ground potential rise, caused by a lighting strike on the OHGW, will cause my phase conductors to flashover.
But, if I don't bond them electricaly the touch potential, on the conductor pole, will be a problem.






RE: Overhead ground wires(OHGW)
It all depends on the risks you are facing - are there a lot of people regularly near the poles, so you want step potential kept low? or do you require higher reliability on a rural line? More questions than answers eh?
RE: Overhead ground wires(OHGW)