DE247276C - - Google Patents

Description

3If ten «example

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 21 c. GROUP

SIEMENS & HALSKE AKT-GES. in Berlin.

Patented in the German Empire on September 23, 1910.

So far it has been difficult to connect weak and strong wires to the same linkage to bring, since the weak wires are driven to the side significantly more by the wind are called the strong wires and this allows easy contacts between the different ones Wires can enter. This drawback is particularly evident in the case of low-voltage overhead lines very annoying, as there are usually a lot of and

ίο differently strong wires on the smallest possible Space are to be accommodated.

As has already been demonstrated, the influence of wind depends on the Ratio of wire diameter to wire weight. Three of the ones shown in the drawing For aluminum, bronze and iron pipes, curves show the known dependence of this factor on the first the diameter of the line determined by the power to be transmitted. It surrenders from this the well-known and sometimes very disturbing fact that Lines of different materials with the same wire diameter and lines the same material of different diameter experience very different influences and therefore not directly Proximity can be laid on a pole. Despite the theoretical knowledge the conditions for the different wind influences of different lines it has not yet succeeded, with certainty and without the cables a very large distance to give each other, mutual contacts of adjacent lines different Diameter or material.

The invention now offers a possibility of overcoming these disadvantages. It consists in that for the individual lines, which are arranged in parallel on a linkage the ratio of the line diameter corresponding to the influence of the wind to the cable weight is made completely or almost the same for all cables. The constancy the ratio, which according to the existing design conditions, such as Mast distance, power to be transmitted, line material, etc., is to be selected either by increasing the surface area compared to a massive one that is to be transmitted Performance adapted ladder or by combining different materials, and although those of predominantly high conductivity with those of predominantly high weight.

Is used, for example, based on the familiar steel and copper wires combined lines ropes in which individual wires from one relatively heavy metal, e.g. B. iron, other wires made of a lighter metal, e.g. B. aluminum or its alloys, it is in the hand, by choosing the cross-section of the iron and aluminum wires to change the weight of the rope and the rope diameter within very wide limits. If you turn a lot of iron for low power, a lot of aluminum for high power

the ratio of diameter to weight, as far as is practically necessary, Keep it constant, as shown by the line marked "Substitute conductor" in the drawing.

With appropriately dimensioned bimetallic lines with an iron core and aluminum jacket one can achieve the same effect; also by cladding the stronger wires with ίο weatherproof material to enlarge the surface and the diameter or by using tubular or stranded conductors you can create the attack surface for influence the wind accordingly.

If you want to add new lines to existing lines, you can dimension them in such a way that that the wind influence is similar to that of the existing lines

adapts. For example, there are already serving as telephone lines on a linkage Bronze wires with a diameter of 2.5 mm are present. New lines are to be added which in their performance are bronze wires of i, 4, 5 and 6 mm in diameter correspond.

The existing bronze wire weighs 44 kg / km. If you now simply take the value of the diameter begins in millimeters, the result is the influencing number

Wire diameter 2.5

57

-1-3

Wire weight

ι mm diameter 7 kg / km diameter
weight

4 -

5 -

6 -

112

175
252

145 χ ic - *,

36 χ ic - ³ ,
29 χ 10 ^3,
24 χ 10- ³ .

With these values that differ greatly from one another and from those of the existing lines, it is of course not possible to influence the wind even approximately evenly and thus to clamp the lines together on a rod. A remedy can be created in the following way:
One chooses

for the 1 mm bronze wire a 3 mm iron wire on which the same telephone power can be transmitted. Weight 54 kg / km, influence figure 56 χ io ~ ³ ;

for the 4 mm bronze wire, a rope made of nine aluminum wires of 1.7 mm and one iron wire of 3 mm, total weight 110 kg / km, influence number 58xio ~ ³ ;

for the 5 mm bronze wire a rope made of an iron wire of 2.6 mm and six aluminum wires of 2.6 mm, weight 130 kg / km, influence number 60 χ io ~ ³ and

for the 6 mm bronze wire an aluminum wire of 8 mm, weight 135 kg / km, influence number 59 χ io ~ ³ .

If you would now use the usual massive bronze wires for the new lines to be tensioned they would use the following influencing figures exhibit:

In this way one obtains practically the same influencing figures and can therefore lead different capacities on one boom in the shortest possible distance arrange from each other.

Claims (1)

Patent claim: Procedure for balancing parallel overhead lines on a rod different line resistance to the same wind influence, characterized that by changing the diameter of the individual lines alone or by combining materials different specific weight is the ratio of the diameter corresponding to the influence of the wind in a manner known per se for the weight of all cables is made completely or almost the same, for the purpose of different types of cables to be able to clamp together on a rod with the same sag. 1 sheet of drawings.