Patent ID: 8952251
Filing Date: 2015-02-10
Classification: H02G

Abstract:
1. A transmission tower structure for suspending a power transmission line, comprising: a pole shaft and a crossarm, the pole shaft supporting the crossarm, and the crossarm having a distal end relative to the pole shaft; the crossarm suspending a three-phase circuit, comprised of: a first V-string insulator assembly having a connection between the first conductor bundle in the first phase and the crossarm of the tower structure, and between the first conductor bundle in the first phase and the pole shaft of the tower structure; a second V-string insulator assembly having a connection between the second conductor bundle in the second phase and the crossarm of the tower structure, and between the second conductor bundle in the second phase and the first conductor bundle in the first phase, the distal end of the crossarm closer to the second conductor bundle than to the first and third conductor bundles, the second conductor bundle further from the pole shaft than the first and third conductor bundles, wherein the second V-string insulator assembly is comprised of a first interphase insulator connected between the first conductor bundle in the first phase and the second conductor bundle in the second phase; a third V-string insulator assembly having a connection between the third conductor bundle in the third phase and the pole shaft of the tower structure, and between the third conductor bundle in the third phase and the second conductor in the second phase, wherein the third V-string insulator assembly is comprised of a second interphase insulator connected between the second conductor bundle in the second phase and the third conductor bundle in the third phase; and at least one ground/shield wire installed on the tower structure, wherein the three-phase circuit is suspended by the first, second, and third V-string insulator assemblies forming a compact delta configuration of phase conductor bundles having multiple conductors and wherein the internal angle between both sides of each of the V-string insulator assemblies is between 60 to 120 degrees; and wherein the first, second and third V-string insulator assembly connections to the tower structure provide connections to ground for the first, second and third phases, respectively, to minimize the risk of multi-phase faults.