Article,
THE CONTROL OF AEOLIAN VIBRATION OF BUNDLED CONDUCTORS
(1974)
Abstract
Spacers inherently reduce the amplitude of aeolian vibration of
bundled conductors. This was first reported in the early 1960's
when it was found that the amplitude of vibration of a two conductor
horizontal bundle strung on an outdoor test span of the
Alcoa Electrical Products Laboratory, with spacers located at 250
foot intervals, was less than half the vibration amplitude of a
single identical conductor in the same span (Figure 1).
Aeolian vibration tests conducted by the Tennessee Valley Authority
from 1970 into 1973 on their Browns Ferry Test Line showed the same
basic results with a three conductor bundle. Typical maximum bending
amplitude for a single conductor was around 24 mils versus 10
or 11 mils for a three conductor bundle under the same conditions.
This relationship was also found to exist for a four conductor bundle
in a diamond configuration during tests conducted in 1972 by
the Bonneville Power Administration on the Nelson River Test Line
of the Manitoba Hydro-Electric Board. Although the bending amplitude
for some of these tests may have been measured at some distance
other than 3-1/2 inches from the point of last contact between the
conductor and the clamp, all references to bending amplitudes were
equated on the basis of 3-1/2 inches.
