SU1363491A1 - Protection device for two-cable communication line - Google Patents

Abstract

The invention provides enhanced security against the effects of external sources of interference. The device contains two reduction transformers (RT) 1.2, two cables 3.4, with acc. shells 5,6 and veins 7,8. PT 1 has a first winding 9, a second winding 10, an additional winding 11 and an additional first winding 12. PT 2 has a first winding 13, a second winding 14, an additional winding 15 and an additional first winding 16. By introducing into each RT an additional first winding and the connection of conductors 7.8 of cable 3.4 with other windings of PT 1.2 voltage is compensated in conductors of 7.8 cables 3.4. This reduces dangerous and disturbing voltages and reduces the mutual effects of cables 3.4. 1 il. with S (L 6 6 4

Description

one

The invention relates to communication technology and can be used to protect two-cable lines when laying two-cable highways near power lines and electrified railways.

The purpose of the invention is to protect it from the influence of external sources of interference.

The drawing shows an electrical block diagram of a device for protecting two-cable communication lines.

The protection device of two-cable lines contains the first reduction transformer 1, the second reduction transformer 2, the first cable 3, the second cable 4, the shell 5 of the first cable, the shell 6 of the second cable of the core 7 of the first cable, the core 8 of the second cable, the first winding 9, the second winding 10, the additional winding 11 and the additional first winding 12 of the first reduction transformer, the first winding 13, the second winding 14, the additional winding 15 and the additional first winding 16 of the second reduction transformer.

The protection device of the two-cable line works as follows.

When high voltages appear on the sheath 5 of the first cable No. sheath 6 of the second cable, the same current flows due to the intersection of the first terminals of the first 9 and the additional first 12 windings of the first reduction transformer i.e. Relocation of the first 3 and second 4 cables at the crossing point relative to the source of interference.

As a result, the same voltage is applied in the second winding 10 and the auxiliary winding 11 of the first reduction transformer, which compensates for the same voltage in cores 7 and 8 of the first and second cables. As a result, the residual voltage on the cable cores is the same. Application of the proposed mouth3634912

The properties allow to increase the security, since not only dangerous, but also interfering stresses g are reduced and the mutual effects between cables are reduced.

Formula inventions

I

A two-cable line protection device containing the first and second reduction transformers, as well as the first and second cables, the first terminal of the first winding of the first reduction transformer is connected to the sheath of the first cable, the first and second terminals of the second winding of the first reduction transformer are connected to the cores of the first cable, The first and second yyrdy of the additional winding of the first reduction transformer are connected to the cores of the second cable, characterized in that, in order to increase the security from external influence x interferers, additional first windings are inserted into each reduction transformer, the first output of the additional first winding of the first reduction transformer is connected to the shell of the second cable, and the second output to the shell of the first cable, the second output of the first winding (First reduction transformer is connected to the shell of the second the cable, the first and second terminals of the first winding of the second reduction transformer are connected to the sheaths of the first cable, isolated from one another, the first and second terminals the additional first winding of the second reduction transformer is connected to the second cable sheaths isolated from one another, the first and second terminals of the second winding of the second reduction transformer are connected respectively to the cores of the second and first cables, the first and second terminals of the second winding of the second reduction transformer are connected respectively to the cores of the first and second cables.

Claims (1)

Claim 10 A two-cable communication line protection device containing the first and second reduction transformers, as well as the first and second cables, the first terminal of the first winding of the first reduction transformer 1f is connected to the sheath of the first cable, the first and second terminals of the second winding of the first reduction transformer are connected to the cores of the first cable , 20 first and second conclusions of the additional winding of the first reduction transformer are connected to the cores of the second cable, characterized in that, in order to increase 25 protection against the influence of external sources of interference, additional first windings are introduced into each reduction transformer, while the first output of the additional first winding 30 of the first reduction transformer is connected to the sheath of the second cable, and the second terminal to the sheath of the first cable, the second terminal of the first winding of the first reduction transformer, etc. is connected to the sheath of the second cable, the first and second terminals of the first winding of the second reduction transformer are connected to insulated from one another first cable, _d0 first and second terminals of the first additional winding of the second transformer is connected to the pressure reducing insulated from one another by a second cable sheaths, prim first and second others. conclusions of the second coil of the second pressure reducing transformer connected respectively to the conductors of the first and second cables, first and second terminals of the second auxiliary winding an induced D transformer are respectively connected to conductors of the first and second cables. VNIIIPI Order 6382/55 Circulation 636; _________ Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4