WO2020225628A1 - Câble électrique pour circuits de commande et de contrôle - Google Patents

Câble électrique pour circuits de commande et de contrôle Download PDF

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Publication number
WO2020225628A1
WO2020225628A1 PCT/IB2020/053708 IB2020053708W WO2020225628A1 WO 2020225628 A1 WO2020225628 A1 WO 2020225628A1 IB 2020053708 W IB2020053708 W IB 2020053708W WO 2020225628 A1 WO2020225628 A1 WO 2020225628A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulation
conductive cores
cable
conductive
core
Prior art date
Application number
PCT/IB2020/053708
Other languages
English (en)
Russian (ru)
Inventor
Геннадий Мещанов
Михаил Шолуденко
Евгений ВАСИЛЬЕВ
Любовь Лаппо
Вера ЛАНКИНА
Ирина Хвощевская
Original Assignee
Открытое Акционерное Общество "Всероссийский Научно-Исследовательский, Проектно-Конструкторский И Технологический Институт Кабельной Промышленности" (Вниикп)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Открытое Акционерное Общество "Всероссийский Научно-Исследовательский, Проектно-Конструкторский И Технологический Институт Кабельной Промышленности" (Вниикп) filed Critical Открытое Акционерное Общество "Всероссийский Научно-Исследовательский, Проектно-Конструкторский И Технологический Институт Кабельной Промышленности" (Вниикп)
Publication of WO2020225628A1 publication Critical patent/WO2020225628A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads

Definitions

  • the utility model relates to electrical engineering, in particular to the construction of electrical cables, mainly for control circuits, monitoring and data transmission in industrial, transport and energy facilities, in particular, in nuclear power facilities.
  • a well-known electric cable containing a core, outside of which belt insulation, a screen and a sheath made of thermoplastic material are sequentially located, the said core is made in the form of twisted bundles, each of which is formed by twisted in pairs and insulated conductors (RU83875, published 03.02.2009).
  • the disadvantage of this known cable is the lack of stability of functional and mechanical parameters in conditions of high seismic activity.
  • the technical problem solved by this utility model is to create a low-current electrical cable with high operational reliability under conditions of intense dynamic loads.
  • the achieved technical result consists in improving the operability of the cable by increasing the stability of electromechanical parameters, in particular the transient attenuation, and the fire safety of the cable under conditions of prolonged high-intensity dynamic loads caused, for example, by seismic activity.
  • the electric cable for control and monitoring circuits contains two conductive cores equipped with insulation from a thermoplastic material, said conductive cores are twisted together with a certain pitch, over the pair of said conductive cores, belt insulation made of polymer material, a screen and a sheath made of thermoplastic material, the ratio of the diameter of said conductive cores provided with insulation to the pitch of twisting said conductive cores in a pair is from 0.0067 to 0.044.
  • the specified technical result is also achieved by the fact that the mentioned conductive cores are spirally wound with a fastening element made of synthetic material with a pitch of not more than 300 mm.
  • the specified technical result is also achieved by the fact that the insulation of each conductive core has its own color.
  • the specified technical result is also achieved by the fact that a thermal barrier made of mica tape or fiberglass is located on top of each conductive core.
  • the screen is made of metal or metal-polymer.
  • a distinctive feature of the design of an electric cable in accordance with this utility model is the optimal selection of the geometric parameters of the elements that form the cable core.
  • Figure 1 shows a cross-section of a cable.
  • the main reason for the loss of operability or fire safety properties by electrically conductive equipment is the destruction of protective coatings, shells, insulation, etc.
  • the mechanics of destruction of coatings made of polymer materials has its own laws. Destruction begins in places of the highest concentration of mechanical stresses (in places of maximum surface friction) and then local fractures cover neighboring areas, causing destruction of conductive materials, cable failure or fire.
  • the electrical cable contains two conductive cores 1 provided with insulation 2 made of thermoplastic material. Insulated conductive conductors 1 are twisted in a pair with a certain twist pitch.
  • Conductive conductors 1 can be made both single-wire and multi-wire, and can be wrapped in a spiral with a fastening element made of synthetic material in increments of no more than 300 mm. This will improve the mechanical properties of the cable.
  • the present invention relates to single-pair electrical cables, the core of which is formed by two twisted conductive conductors.
  • a fastening element which can be synthetic threads or tapes.
  • the ratio of the diameter of the said conductive conductors 1 provided with insulation 2 to the twisting pitch of the said conductive conductors 1 in a pair is from 0.0067 to 0.044. It has been experimentally established that the stability of the electromechanical properties of the cable under dynamic loads, especially transient attenuation, depends on the location and size of the centers of mechanical stress concentration. With the specified ratio of the twisting steps, the stability of the crosstalk is achieved under dynamic loads on the cable. When the value of this ratio is less than 0.0067, the crosstalk attenuation increases due to the large curvature of the bending of the conductive conductors 1. With values greater than 0.044, the core diameter becomes unstable. In this case, the shield 4 and the sheath 5 exert uneven pressure on different sections of the conductive cores 1, which leads to the formation of mechanical stress concentrators. In addition, the stated range provides an optimal ratio of the running weight of the cable and its tensile strength.
  • Insulation 2 of each core should be done in a different color to facilitate installation and integrity testing.
  • Conducting conductors 1 can be made single-wire or multi-wire.
  • Insulation 2 and casing 5 are expediently made of halogen-free thermoplastic polymer composition.
  • the screen 4 is expediently made of a metal or metal-polymer tape (for example, an alumopolymer tape) with a thickness of at least 0.05 mm. It is advisable to lay a tinned copper contact wire (the cross-section of which is shown at 6) with a diameter of 0.3 mm to 0.6 mm under the shield 4.
  • a thermal barrier made of mica tape or fiberglass can be located outside each conductor.
  • the belt insulation 3 can be made of polymer material.
  • the cable in accordance with the present invention can be manufactured using known industrial equipment using known technologies.
  • the specified ratio of the diameter of the mentioned conductive conductors 1, provided with insulation 2, to the twisting pitch of the mentioned conductive conductors 1 in a pair makes it possible to ensure the stability, first of all, of the transient attenuation, as well as other structural, electrical, mechanical, physical and mechanical parameters of the cable and to preserve its performance when exposed earthquakes, vibrations and dynamic loads of any other origin.

Landscapes

  • Communication Cables (AREA)

Abstract

Le modèle d'utilité se rapporte au domaine des équipements conducteurs de courant. Ce câble comprend une âme autour de laquelle sont disposés successivement une bande d'isolation (3), un blindage (4) et une gaine (5) faite d'un matériau thermoplastique. L'âme se présente sous forme de deux fils conducteurs de courant (1) torsadés l'un avec l'autre et comportant une isolation (2). Le résultat technique consiste en une augmentation de la fiabilité.
PCT/IB2020/053708 2019-05-06 2020-04-20 Câble électrique pour circuits de commande et de contrôle WO2020225628A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2019113573 2019-05-06
RU2019113573 2019-05-06

Publications (1)

Publication Number Publication Date
WO2020225628A1 true WO2020225628A1 (fr) 2020-11-12

Family

ID=73051026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/053708 WO2020225628A1 (fr) 2019-05-06 2020-04-20 Câble électrique pour circuits de commande et de contrôle

Country Status (1)

Country Link
WO (1) WO2020225628A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA001031B1 (ru) * 1996-05-29 2000-08-28 Абб Аб Изолированный проводник для высоковольтных обмоток
RU113863U1 (ru) * 2011-10-21 2012-02-27 Евгений Андреевич Старожук Симметричный низкочастотный кабель связи
RU138270U1 (ru) * 2013-09-05 2014-03-10 Открытое акционерное общество Всероссийский научно-исследовательский, проектно-конструкторский и технологический институт кабельной промышленности (ВНИИ КП) Кабель для систем связи, сигнализации и блокировки
RU162467U1 (ru) * 2015-10-26 2016-06-10 Общество с ограниченной ответственностью "Кабель Технологии Инновации" Кабель многожильный силовой огнестойкий с комбинированной изоляцией и оболочками, не содержащими галогены
RU166059U1 (ru) * 2016-05-24 2016-11-10 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Кабель судовой

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA001031B1 (ru) * 1996-05-29 2000-08-28 Абб Аб Изолированный проводник для высоковольтных обмоток
RU113863U1 (ru) * 2011-10-21 2012-02-27 Евгений Андреевич Старожук Симметричный низкочастотный кабель связи
RU138270U1 (ru) * 2013-09-05 2014-03-10 Открытое акционерное общество Всероссийский научно-исследовательский, проектно-конструкторский и технологический институт кабельной промышленности (ВНИИ КП) Кабель для систем связи, сигнализации и блокировки
RU162467U1 (ru) * 2015-10-26 2016-06-10 Общество с ограниченной ответственностью "Кабель Технологии Инновации" Кабель многожильный силовой огнестойкий с комбинированной изоляцией и оболочками, не содержащими галогены
RU166059U1 (ru) * 2016-05-24 2016-11-10 Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации Кабель судовой

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