SU924873A2

SU924873A2 - Device for protecting communication line from high-voltage line influence

Info

Publication number: SU924873A2
Application number: SU802942441A
Authority: SU
Inventors: Эдуард Львович Портнов
Original assignee: Московский Ордена Трудового Красного Знамени Электротехнический Институт Связи
Priority date: 1980-06-18
Filing date: 1980-06-18
Publication date: 1982-04-30

Description

Изобретение относится к технике связи и может использоваться при защите воздушных и кабельных линий связи от опасного влияния линий высокого напряжения и является усовершенствованием известного изобретения.The invention relates to communication technology and can be used to protect overhead and cable communication lines from the dangerous effects of high voltage lines and is an improvement of the known invention.

По основному авт. св. № 760459 известно устройство защиты линий связи от влияния высоковольтных линий, содержащее редукционный трансформатор, первый вывод первичной обмотки которого соединен с оболочкой кабеля связи, а вторичной обмоткой которого является пучок жил симметричного кабеля, дополнительная вторичная обмотка редукционного трансформатора , выполненного в виде коаксиальной пары, проводники которой соединены с соответствующими проводниками коаксиального кабеля, имеется также пороговый блок и коммутационный элемент с размыкающими контактами, причем пороговый блок включен между вторым выводом первичной обмотки редукционного трансформатора и оболочкой симметричного кабеля, соединенной с внешним проводником коаксиального кабеля, выход порогового блока соединен со входом коммутационного элемента, размыкающие контакты которого включены между соответствующими жилами пучка симметричного кабеля параллельно вторичной обмотке редукционного трансформатора [1] .According to the main author. St. No. 760459 it is known a device for protecting communication lines from the influence of high-voltage lines, comprising a reduction transformer, the first output of the primary winding of which is connected to the sheath of the communication cable, and the secondary winding of which is a bundle of wires of a symmetrical cable, an additional secondary winding of the reduction transformer made in the form of a coaxial pair, conductors which are connected to the corresponding conductors of the coaxial cable, there is also a threshold unit and a switching element with NC contacts, m the threshold block is connected between the second terminal of the primary winding of the reduction transformer and the sheath of the symmetrical cable connected to the external conductor of the coaxial cable, the output of the threshold block is connected to the input of the switching element, the opening contacts of which are connected between the corresponding conductors of the bundle of the symmetrical cable parallel to the secondary winding of the reduction transformer [1] .

Однако известное устройство не обеспечивает защиту от помех.However, the known device does not provide protection against interference.

Цель изобретения - обеспечение защиты от помех.The purpose of the invention is to provide protection against interference.

Для достижения указанной цели в известное устройство защиты линий связи от влияния высоковольтных линий введены дополнительные контакты коммутационного элемента и последовательно соединенные блок пуска, электродвигатель и переходной элемент, причем размыкающие контакты коммутационного элемента выполнены подвижными и механически связаны с переходным элементом, а дополнительные контакты коммутационного элемента включены между коммутационным элементом и блоком пуска.To achieve this goal, in the known device for protecting communication lines from the influence of high-voltage lines, additional contacts of the switching element and series-connected start block, an electric motor and a transition element are introduced, the opening contacts of the switching element being movable and mechanically connected to the transition element, and additional contacts of the switching element are included between the switching element and the starter.

На чертеже представлена структурная электрическая схема предлагаемого устройства.The drawing shows a structural electrical diagram of the proposed device.

Устройство защиты линий связи от влияния высоковольтных линий содержит редукционный трансформатор 1 , имеющий первичную, вторичную и дополнительную вторичную обмотки 2-4 соответственно, симметричный кабель 5 с пучком 6 жил, коаксиальный кабель 7 с проводниками 8, пороговый блок 9, коммутационный элемент 10 с размыкающими контактами 11 и дополнительными контактами 12, электродвигатель 13, переходной элемент 14, блок 15 пуска.The device for protecting communication lines from the influence of high-voltage lines contains a reduction transformer 1 having a primary, secondary and additional secondary windings 2-4, respectively, a symmetrical cable 5 with a bundle of 6 cores, a coaxial cable 7 with conductors 8, a threshold unit 9, a switching element 10 with disconnecting contacts 11 and additional contacts 12, the motor 13, the transition element 14, block 15 start.

Устройство работает следующим образом ,The device operates as follows,

В нормальных условиях размыкающие контакты полностью шунтируют каждую из обмоток редукционного трансформатора. При появлении напряжений через первичную обмотку 2 и пороговый блок 9 протекает ток.Under normal conditions, the opening contacts completely bypass each of the windings of the reduction transformer. When voltage appears through the primary winding 2 and the threshold unit 9, current flows.

коммутационный элемент 10 срабаты-зо. вает и замыкает группу размыкающих контактов И. Срабатывает блок 15, который запускает электродвигатель 13_? который через блок 15 перемещает дополнительные контакты 12 до тех пор, пока не отключит размыкающие контакты коммутационный элемент 10. Это бу 5 дет показывать, что наведенная длительность помех полностью скомпенсирована .switching element 10 srabaty-zo. opens and closes a group of NC contacts I. Does block 15 work, which starts the electric motor 13 _? which, through the block 15, moves the additional contacts 12 until the disconnecting contacts disconnect the switching element 10. This will show 5 that the induced duration of the interference is completely compensated.

Таким образом, в результате при10 менения предлагаемого устройства повышается эффективность защиты от дли· тельных - кратковременных наведенных напряжений и помех.Thus, as a result of the application of the proposed device, the efficiency of protection against long - short-term induced voltages and interference is increased.

Claims

The invention relates to communication technology and can be used in protecting air and cable communication lines from the dangerous effects of high voltage lines and is an improvement on the known invention. St. No. 760A59, it is known to protect the communication lines from the influence of high-voltage lines, which contains a reducing transformer, the first output of the primary winding of which is connected to the sheath of the communication cable, and the secondary winding of which is a bundle of conductors of a symmetric cable, an additional secondary winding of the reduction transformer made in the form of a coaxial pair, the conductors of which are connected to the corresponding conductors of the coaxial cable, there is also a threshold unit and a switching element with break contacts the threshold unit is connected between the second output of the primary winding of the reduction transformer and the sheath of a symmetrical cable connected to the outer conductor of the coaxial cable, the output of the threshold unit is connected to the input of the switching element, the disconnecting contacts of which are connected between the respective cores of the beam of the balanced cable parallel to the secondary winding of the reduction transformer 1. However, the known device does not provide protection from interference. The purpose of the invention is to provide protection against interference. To achieve this goal, additional contacts of the switching element and series-connected start-up unit, an electric motor and a transition element are introduced into the known protection device of communication lines against the influence of high-voltage lines. The switching contacts of the switching element are made movable and mechanically connected to the transition element, and additional contacts switching element included between the switching element and the start block. The drawing shows a structural electrical circuit of the proposed device. The protection device of communication lines against the influence of high-voltage lines contains a reducing transformer 1 having primary, secondary and additional secondary windings 2-k, respectively, a symmetrical cable 5 with a bundle of 6 cores, a coaxial cable 7 with conductors 8, a threshold unit 9 switching element 10 s opening contacts 11 and additional contacts 12, the motor 13, the transition element 1, the block 15 start. The device operates as follows. Under normal conditions, the opening contacts completely shunt each of the windings of the reduction transformer. When voltages appear through the primary winding 2 and the threshold unit 9, a current flows. The switching element 10 is activated and closes the group of disconnecting contacts 11. Block 15 is triggered, which starts the motor 13 92 34 which moves additional, additional contacts 12 through block 15 until the disconnecting switch 10 disconnects the disconnecting contacts. the induced interference duration is fully compensated. Thus, as a result of the application of the proposed device, the effectiveness of protection against long-lasting induced voltage and interference is increased. Claims of Invention Device for protection of communication lines from the influence of high-voltage lines St. No. 0 is distinguished by the fact that, in order to provide protection against interference, additional contacts of the switching element and series-connected start-up unit, an electric motor and a transition element are introduced, the opening contacts of the switching element being movable and mechanically connected to the transition element. The contacts of the switching element are connected between the switching element and the start-up unit.