SU1210675A3 - Busbar - Google Patents

Description

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The invention relates to power engineering, in particular to high-current busbars, connecting a generator with a step-up transformer.

The purpose of the invention is to increase the electrodynamic stability of the busline and reduce its impact on the environment.

FIG. 1 shows a bus duct, top view; in fig. 2 - section of busbar with single-phase switching elements and screens, side view; in fig. 3 is a view along a single phase busbar.

The bus duct contains current carrying buses 1, phase-wise located in casings 2, connected at the beginning and at the end of the bus duct by transverse conductive jumpers 3, and single-phase switching elements 4, embedded into busbars 1.

On both sides of the contact system 5, each of the switching elements 4, the screens 6 are located symmetrically relative to it, and the busbars 2 are connected to the housings 2.

To each of the screens 6, on the inside, plates 7 of insulating material are fixed.

Screens 6 are made in the form of sectors whose radius exceeds the radius

casing 2.

The transverse conductor jumpers 3 installed near the generator and transformer, connecting the busbar covers and screens 6, are connected to the busbar covers 2 and make it possible to create a path for the flow of longitudinal currents induced

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in housings along their entire length, i.e. from

generator to transformer.

In such a busbar, the longitudinal current in the case 2 of each phase, induced by the current flowing through the current-carrying bus 1 and the contact system 5 of the switching element 4, is approximately halved in the shields 6.

Since longitudinal currents in shells with screens flow in a direction opposite to the direction flowing through the bus and the contact system of the switching element, the strength of the magnetic field taking place outside the shells, including in the area of the switching elements, decreases by about 90%.

As a result, the heating of steel and reinforced concrete structures near the busbar is practically eliminated.

Electrodynamic busbars are also affected, affecting the switching elements and the busbar as a whole, including the supporting insulators securing the bus in the casing.

Plates of insulating material, fixed to each of the shields on the inner side, act as an isolation fencing, protecting against the possibility of overlapping the contact system of the switching elements on the shields from the open contacts, they also contribute to weakening the magnetic field, making it possible to bring the shields to switching element.

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FIG. 2

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Claims (2)

1. A BUSBAR containing current-carrying busbars, phase-wound in housings connected at the beginning and at the end of a busbar transverse to paragraph 1, according to the clause, which are indicated in the form of sectors with new conductive jumpers and single-phase switching elements embedded in the busbars, characterized in that, in order to increase its electrodynamic stability and reduce environmental impact, it is equipped with screens located on both sides of the contact system of each of the switching elements, symmetrically relative to it, connected to the casing and the busbar, and the plates of insulating material prikrep lennymi to each of the screens on the inner side. 2. Busbar-shielding screens made radius of which exceeds the radius of the casing. 1 12