SU1570002A2 - Device for protection of two-cable communication line - Google Patents

Abstract

The invention relates to communication technology. The purpose of the invention is to increase the protection of communication cables against the effects of lightning discharges and high-voltage lines by uniformly distributing currents in the transformer windings and cables. The device contains the first 1 and second 2 cables with shells 3 and 4 and conductors 5 and 6, a reducing transformer 7 with windings 8, 9, 10, 11 and 12, ground wire 13 and 14, insulating sleeves 15, threshold blocks 16 and 19, closing contacts 17 and 18. The introduction of the sixth additional winding 26 allows the sheathing of shells 3 and 4 of cables 1 and 2 to cross and achieve current symmetry along each of the shells 3 and 4 and in the windings 8 and 26. 1 Il.

Description

second 2 cables with shells 3 and 4 and conductors 5 and 6, reducing transformer 7 with windings 8, 9, 10, 11 and 12, ground wire 13 and 14, insulating sleeves 15, threshold blocks 16 and 19, closing contacts 17 and 18 The introduction of the sixth additional winding 26 allows crossing of shells 3 and 4 of cables 1 and 2 and achieving symmetry of currents along each of shells 3 and 4 and in windings 8 and 26. 1 sludge.

The invention relates to communication technology, can be used when laying cable backbones near the power line and electrified railways and active load carrying areas, and is an improvement in the device avtoCv. No. 1297235.

The purpose of the invention is to increase the effectiveness of protecting communication cables from the effects of lightning discharges and high-voltage lines by uniformly distributing currents in transformer windings and cables.

The drawing shows a diagram of a portion of a double-cable line protection device.

The protection device of the two-cable connection contains the first and second cables 1 and 2 with shells 3 and 4 and the conductors 5 and 6, respectively, a reduction transformer 7, the first and second windings 8 and 9 of a reduction transformer 7, the first, second and third additional windings 10 - 12 reduction transformer 7, first and second ground wire 13 and 14, isolating clutches 15, threshold unit 16 with first and second closing contacts 17 and 18, additional threshold units 19, main and additional tires 20 and 21 Earth, additional fourth and fifth bmotki 22 and 23 reducing transformer 7, a capacitor 24, variable resistor 25 and the active sixth additional obmotku- reducing transformer 26 7.

The device works as follows.

When high voltages appear, sheaths 3 and 4 of the first and second cables 1 and 2 carry current, the primary winding 8, the second, third and fourth windings 11, 12 and 26 of the reduction transformer 7 generate a voltage that indicates a lack of

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exact saturation of the armor and reducing the efficiency of the reduction transformer 7. As a result, the threshold unit 16 is activated and closes the first and second closing contacts 17 and 18 to the additional bus 21 and the first and second ground wire 13 and 14. Additional threshold units 19 connect the remaining length of the cable line, and part of the current begins to spread through the sheaths 3 and 4 of the first and second cables 1 and 2, the main and additional busbars 20 and 21, and the first and second ground wire 13 and 14. The introduction of the sixth additional winding 26 allows l is run mating shells 3 and 4 of the cables 1 and 2 and achieve symmetry currents for each of the shells 3 and 4 and the windings 8 and 26 reducing transformer 7.

When a lightning strikes one of the ground wire 13 or 14, the current is distributed between the cables 1 and 2 and the ground wire 13 and 14. In order to limit the currents along the ground wire 13 and 14 and achieve the same size, the ground wire 13 and 14 on the one hand, they are included in the second additional winding with crossing, and on the other hand, in the third additional winding 12, the fourth and fifth windings 22 and 23 together with the capacitor 24 and the variable active resistor 25 create a circuit tuned to the frequency of the influencing lightning discharge to which allows the currents in the windings of the transformer 7 and ground wire 13 and 14 to be distributed uniformly limited by a special connection.

The application of the proposed device allows to reduce the cost of protection against external and mutual influences and to increase the effect of protecting the cable line.

5 15700026

Claims (1)

Claims of the invention of the pole pole are additional winding, Protection device double cable which is included in the shell communication lines by auth. No. 1297235, of the second cable, and the end of the sixth cable is complemented by the fact that, with a “winding winding, is included in the sheath the purpose of increasing the protection of the first cable, and the first and second runners of communication from the influence of lightning razopasitelny cables are connected through the second and high-voltage lines through the third additional windings uniform distribution of currents of the injector transformer with transformer scrapings and cables, input.