SU777767A1 - Distributing device vertical bus - Google Patents

Description

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The imbibe phases are made with a large split pitch.

FIG. I shows the proposed vertical busbar; in fig. 2 and 3 are examples of constructive implementation of busbar phases with different equivalent wire radii.

The vertical busbar contains the upper phase 1, the middle phase 2 and. the lower phase 3, fixed respectively on the wires of insulators 4, 5 and 6 and suspended from the girders 7, 8 and 9 of the tire portal 10. The distance to the meladu phases 1, 2 and 3 and about vertical is greater than the corresponding distances between these phases horizontals, and at least one of the overlying phases has a larger equivalent radius of the wires.

The equivalent wire radius is equal to its geometrical radius if the busbar phase is made from a single wire and is calculated using well-known formulas as a function of the number used, their distance between them, and the geometrical radius of individual components, if the busbar phase is made of split wires

FIG. 2 shows an example of a constructive implementation of the phases of a bus-bar. Upper phase 1 and middle phase 2 are split into three components each, lower, 3 are split into-two s (7Sta, which have a smaller radius, for example PA-500, with a smaller cleavage pitch. For example, the equivalent phase radius 3 less than the equivalent radii of the overlying phases 2 and 1.

FIG. 3 shows another example of a constructive implementation of the phases of a bus-bar. The upper phase 1 is split in two components, the middle phase 2 is split into three components with a split step larger than the upper phase 1. The lower phase 3 is made with a single wire, therefore its equivalent radius is equal to the geometrical radius of the wire, which is slightly smaller than the equivalent radius of the upper phase 1 and especially middle phase 2.

Thus, changing the equivalent wire radius of a phase wire is practically accomplished in various ways; a change in the geometric radius of the wire, a transition from a single wire to a split and vice versa, a change in the number of components of the split wire (by changing the split ratio), a change in the distance between the components of the split wire (by changing the split pitch), a combination of several paths at the same time.

The positive effect of the proposed vertical busbar is explained as follows. Chap electric power

the larger the capacitance relative to the earth of the electrode (wire) that creates the field, and the potential of this electrode (wire), the larger the space in the busbar space. The capacitance increases with an increase in the equivalent radius of the wire and a decrease in its distance from the earth and from man.

The value of Echel under the vertical busbar consists of three components - from the top of phase 1, middle phase 2 and lower phase 3. The maximum value of the people will be at the moment when the voltage on the lower phase 3 passes through a maximum, i.e. its normal component field is given by the potential plus t / max, and the normal field components from the two upper phases 1 and 2 are determined by the potential minus 0.5 /7. max on each.

By increasing the equivalent radius of the wires to the top 1 and especially to the middle 2 phase, i.e., increasing the capacitance of the latter relative to the earth, it is possible to increase those components of the field that are subtracted from the component strength created by the lower phase 3 and, consequently, reduce the people. In other words, an increase in the equivalent radius of the wires of the upper phases makes it possible to compensate for

their greater, compared with the lower phase, remoteness from the earth and man.

Using the proposed busbar can significantly reduce the intensity of people under a vertical busbar, making

it is even smaller than the number of people under a horizontal busbar with the same distance from the NIL: it leads to the ground. In the practical implementation of the invention it is necessary to ensure that the intensity

the electric floor on the wires did not exceed 30-32 kV / cm.

Claims (5)

1. Vertical busbar of the high voltage switchgear, contains phases that are one above the other, and the chalk vertical distances are greater than the horizontal phase shift relative to each other, characterized in that, in order to reduce the harmful effect of the electric field, at least one of the overlying phases made with an equivalent radius greater than the equivalent radius of the wires of at least one of the underlying phases. 2. Busbar according to claim 1, characterized in that the geometrical radius of the wire of at least one of the overlying phases greater than the geometric radius of the wire at least one of the underlying phases. 3. The busbar according to claim 1, characterized in that at least one of the overlying phases is split. 4. The busbar according to claim 3, wherein all the phases are made split, with at least one of the overlying phases made with a greater splitting ratio. 5. The busbar according to claim 3, characterized in that all the phases are made split, with at least one of the leaching phases made with a large cleavage step. Sources of information taken into account in the examination 1. Kozlov M.D. Resheny on the electrical part of the project of the Krasnora hydroelectric station. Sat Proceedings of Lengidroproekt, No. 3, 1966. -7 -10 S Jv g