Overhead Line Crossing - Crossings of Other Overhead Lines

Crossings of Other Overhead Lines

At crossings of overhead lines by other overhead lines, the two lines must be kept at the necessary safety distances between the lines and the ground. As a rule, the line with the lower voltage passes under the line with higher voltage. Construction workers try to plan these crossings in such a way that their construction is as economical as possible. This is usually done by leaving unchanged the line that is crossed, if possible. Undercrossings of existing lines are often constructed in proximity to the line's pylons, since this can often be accomplished without raising the existing pylons and while keeping the necessary safety distances between the ground and the other line.

In the course of undercrossings the pylon picture is frequently changed, and because of its small height it is preferable to create an arrangement with conductors in one level. Sometimes at such crossings there can be problems because of the maximum pylon height allowed for flight safety reasons. If it is not possible at a given location for the pylons of the upper line to be built at a necessary height, the line running below it will be rebuilt on smaller pylons or replaced with an underground cable.

A unique undercrossing of two powerlines can be found north of Kincardine at Scotland at 56°5'17"N 3°43'11"W. Here crosses the powerline Kincardine-Tealing two other lines. One of the two circuits of Kincardine-Tealing powerline crosses these lines on two small pylons and the other circuit via an underground cable.

Read more about this topic:  Overhead Line Crossing

Other articles related to "crossings of other overhead lines, crossings, overhead, lines, line":

Overhead Line Crossing - Crossings of Other Overhead Lines - Special Crossings From Overhead Lines of Other Overhead Lines
... There are some crossings between two overhead powerlines, which are unique, either as both lines are of special type or the unique way of implemention Coordinates Line 1 Line 2 Reason of unity 47 ...

Famous quotes containing the words lines and/or overhead:

    The opera isn’t over till the fat lady sings.
    —Anonymous.

    A modern proverb along the lines of “don’t count your chickens before they’re hatched.” This form of words has no precise origin, though both Bartlett’s Familiar Quotations (16th ed., 1992)

    During a walk or in a book or in the middle of an embrace, suddenly I awake to a stark amazement at everything. The bare fact of existence paralyzes me... To be alive is so incredible that all I can do is to lie still and merely breathe—like an infant on its back in a cot. It is impossible to be interested in anything in particular while overhead the sun shines or underneath my feet grows a single blade of grass.
    W.N.P. Barbellion (1889–1919)