SU1339040A1 - Point for sectionalizing a.c.contact system - Google Patents

Abstract

The invention relates to electrical engineering and is intended for use in sectioning points of an AC contact network. The purpose of the invention is to prevent the contact wire from burning out in the interface areas of anchor sections with a neutral insert. This is achieved by the fact that p-diode circuits are additionally introduced into the partitioning point of the AC contact network, which shunt the terminal insulating junctions and are connected opposite to each other. 3 il. from 00 with

Description

The invention relates to electrical engineering, namely, to electrification devices for railway transport, and is intended for use in the section points of an AC contact network in the junction areas of anchor sections with a neutral insert.

The purpose of the invention is to prevent the contact wire from burning in the mating areas of anchor sections with a neutral insert.

Figure 1 shows a diagram of the sectioning section of an alternating current contact network in figure 2 - a graph of the supply voltage on the contact wire, which explains the arc extinction when the pantograph passes the first electric locomotive (in the direction of travel) of the terminal insulating interface supply voltages on the contact wires, which remove the arc quenching when the pantograph passes the electric locomotive of the central insulating mate.

The section section of an AC contact network contains a neutral insert 1, a central insulating junction 2, terminal insulating junctions 3 and 4, contact wires 5 and 6. At the section section of a contact network there are first 7 and the second 8 p-diode circuits bypass the terminal insulating conjugations 3 and A. Chains 7 and 8 are included in each other's counter.

The operation of the contact network partitioning point when powering the contact wires 5 and 6 from different network phases (for example, A and B) is carried out as follows.

When an electric locomotive pantograph enters the neutral insert 1 from the side of the contact wire 5, the first terminal insulating junction 3 overlaps with the arc. However, with a positive half-wave voltage on the contact wire 5, the resulting arc is shunted by diode chain 7. During the shunting time (10 ms), the isolation gap of conjugation 3 deionizes, and the arc goes out (Fig. 2).

The current enters the pantograph of the locomotive from the contact wire 5 through the chain 7 and the neutral insert 1. The current consumption has a pulsating

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character, since the reverse half-wave of the current is cut off by the chain 7.

With the passage of the pantogrf of the electric locomotive of the central insulating mating 2, the resulting arc is extinguished at time t, (Fig. 3) and can occur again only at time t. However, for the time interval from

Q t, up to tj, the isolation gap of conjugation 2 is deionized, and the burning of the arc is not restored.

After the passage of conjugation 2, the current enters the pantograph electro 15 from the contact wire 6 through the chain 8 and the neutral insert 1. The pantograph passes the electric locomotive of the isolating coupling 4 without the occurrence of an arc.

20 The operation of the sectioning point when powering wires 5 and 6 from the same phases of the network when the pantograph passes the electric locomotive terminal insulating mates 3 and 4 is performed

25 is analogous, and when passing through the central insulating interface 2, the arc extinguishes with negative half-waves of the supply voltage on the contact wires 5 and 6.

3Q The positive effect created by the invention is that when an electric locomotive enters under load on a neutral insert with central and two end insulating mates connected between the ends of the contact wires of the adjacent substation areas, the overvoltage of the contact wires is eliminated, since the arc is limited to 10 j,

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while powering the wire requires a power of 150-350 J. In addition, restrictions on the speed of trains through sectioning stations of an AC contact network are removed and it is possible to place such points on tracks with zero gradient, which is especially important when building new electrified railway lines current.

Claims (1)

Invention Formula A section section of an AC contact network containing a neutral insert with central insulating mating, two end insulating mats, connected between the contact wires characterized by the fact that, in order to prevent the contact wire from burning, it additionally G /   /. 5 J 7 kidneys shunt terminal isolating mates and included counter to each other. (rig. 1  ; Burning - dl. arcs FIG. 2 email arcs ..; Editor V.Danko Compiled by O. Orlov Tehred L. Oliynyk Order 4176/13 Circulation 598 Subscription The USSR State Committee on Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, Projecto st., 4 fig.Z Proofreader I. Muska