Electric Power Transmission Principles And Calculations Including a Revision O
Electric Power Transmission Principles And Calculations Including a Revision O
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No high degree of accuracy is claimed for the results of these numerical examples, the calculations being made on the slide-rule.
129. Conclusions Overhead Lines on Steep Grade. Except for the fact that the pole foundations must be wisely chosen, and sp. Ecial attention paid to the setting of the poles, there are no engineering difficulties in the way of running an overhead line up a steep incline. It may be well to reduce the length of span measured horizontally so that this is equal to about ...V cos 6, where V is the distance between supports on level ground, and 6 is the angle which the average slope of the line makes with the horizontal. This will ensure that the vertical load to be sup- ported by the insulators does not exceed the vertical load on the level runs; but no difficulty need be experienced in arranging for each pole to take its proper share of the weight of the wire (with or without ice loading).
The stringing of the wires may be done with the aid of a dyna- mometer; or the deflection, as calculated by formula (122), maybe measured by sighting from pole to pole.
What to read after Electric Power Transmission Principles And Calculations Including a Revision O?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Still to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
No high degree of accuracy is claimed for the results of these numerical examples, the calculations being made on the slide-rule.
129. Conclusions Overhead Lines on Steep Grade. Except for the fact that the pole foundations must be wisely chosen, and sp. Ecial attention paid to the setting of the poles, there are no engineering difficulties in the way of running an overhead line up a steep incline. It may be well to reduce the length of span measured horizontally so that this is equal to about ...V cos 6, where V is the distance between supports on level ground, and 6 is the angle which the average slope of the line makes with the horizontal. This will ensure that the vertical load to be sup- ported by the insulators does not exceed the vertical load on the level runs; but no difficulty need be experienced in arranging for each pole to take its proper share of the weight of the wire (with or without ice loading).
The stringing of the wires may be done with the aid of a dyna- mometer; or the deflection, as calculated by formula (122), maybe measured by sighting from pole to pole.
What to read after Electric Power Transmission Principles And Calculations Including a Revision O?
You can find similar books in the "Read Also" column, or choose other free books by Alfred Still to read onlineMoreLess
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