Yjoshi
Electrical
- May 23, 2011
- 32
Dear collegues,
We are building an overhead powerline (500kV) and recently we started to experiment some problems with the conductor (ACSR). Basically, the conductor is showing a separation between the lairs of aluminum (kind of an bird cage effect) before it reaches the tensioner. To me its clear that the problem is the conductor but the supplier showed a local standard (Brazil) in which it is forbidden to use a tensioner with less than three rounds of the conductor in the drum of the equipment. The standard is from 1980 and I am pretty sure that was not defined to prevent this from happening (and we are getting the problem before the conductor passes through the equipment). We already contact the manufacturer of the equipment and he explained that the number of turns on the drum depends on the tension required, but has not been able to supply any documentation that could assist us with our client. We know that at the end they will have to accept that this is a problem associated with the conductor and not with our equipment, but meanwhile they are forcing us to stop the stringing. Does anyone knows if there is a standard stablishing some sort of relationship between the numbers of turns and the tension (or anything we could use in this matter)?
We are building an overhead powerline (500kV) and recently we started to experiment some problems with the conductor (ACSR). Basically, the conductor is showing a separation between the lairs of aluminum (kind of an bird cage effect) before it reaches the tensioner. To me its clear that the problem is the conductor but the supplier showed a local standard (Brazil) in which it is forbidden to use a tensioner with less than three rounds of the conductor in the drum of the equipment. The standard is from 1980 and I am pretty sure that was not defined to prevent this from happening (and we are getting the problem before the conductor passes through the equipment). We already contact the manufacturer of the equipment and he explained that the number of turns on the drum depends on the tension required, but has not been able to supply any documentation that could assist us with our client. We know that at the end they will have to accept that this is a problem associated with the conductor and not with our equipment, but meanwhile they are forcing us to stop the stringing. Does anyone knows if there is a standard stablishing some sort of relationship between the numbers of turns and the tension (or anything we could use in this matter)?