RU68174U1 - FLEXIBLE SCREEN CABLE - Google Patents

Abstract

The utility model relates to the cable industry of the electrical industry and can be used in the mining industry for connecting self-propelled wagons with electric drive to electric networks.

Creating a mine cable that meets the requirements of the consumer remains very relevant.

The developed cable of the KGESUL brand is designed to connect self-propelled cars with an electric drive to electric networks for a rated voltage of alternating current up to 1140 V at a nominal frequency of 50 Hz on main conductors and up to 220 V on an auxiliary vein.

The main factor of economic efficiency is an increase in cable reliability due to improvements in cable design.

Description

The utility model relates to the cable industry of the electrical industry and can be used in the mining industry for connecting self-propelled wagons with electric drive to electric networks.

Creating a mine cable that meets the requirements of the consumer remains very relevant.

Known cable brand KGPEU, consisting of three main conductors in rubber insulation, two grounding conductors, auxiliary conductor in rubber insulation, core of conductive rubber, a waist shield of conductive rubber, in a rubber sheath that does not spread combustion.

The disadvantages of the analogue are:

- the main veins are destroyed during operation;

- the cable twists during operation.

The developed cable of the KGESUL brand is designed to connect self-propelled cars with an electric drive to electric networks for a rated voltage of alternating current up to 1140 V at a nominal frequency of 50 Hz on main conductors and up to 220 V on an auxiliary vein.

Type of climatic modification - U and T, placement category 5 at ambient temperature from minus 30 ° С to 55 ° С.

Technical specifications

The electrical resistance of the conductor to direct current, calculated per 1 km of length and a temperature of 20 ° C, meets the requirements of GOST 22483 for flexibility class 5.

The insulation resistance of the main cable conductors, calculated per 1 km of length and a temperature of 20 ° C, is at least 50 megohms.

The electrical resistance of the shields to direct current of the main and auxiliary cable cores at a temperature of 20 ° C is not more than 1500 Ohms.

Mechanical Requirements

The cable is resistant to repeated kinks through a system of rollers. Bending angle: ± π rad.

The nominal tensile load, the nominal diameter of the rollers and the number of bending cycles must correspond to the values indicated in table 1.

Table 1 Cable brand Nominal section of the main core, mm ² Nominal tensile load, N Nominal diameter of a roller, mm The number of bending cycles KGESUL 35 (800 ± 10)% 200 20000

The cable can withstand a tensile force of at least 19.6 N (2.0 kgf) per 1 mm ^{2 of the} total cross section of the cores.

External exposure requirements

The long-term permissible temperature on the conductive conductors of the cable is not higher than 70 ° C.

The maximum permissible ambient temperature during cable operation is 55 ° C.

Minimum permissible ambient temperature during operation minus 30 ° С.

The cable during operation is resistant to a change in ambient temperature from minus 30 ° C to plus 55 ° C.

The cable does not spread combustion in a single installation.

The tropical cable is resistant to mold damage.

Reliability requirements

The service life of the cables, within which the running hours are provided, is at least one year - subject to the conditions of storage, installation and operation of the cable requirements of these specifications.

The service life is calculated from the date of commissioning.

The design of the cable KGESUL presented in figure 1.

Conducting cable conductors from tinned copper wires 1 - correspond to the 5th class of flexibility.

The main conductors of the cable are sequentially superimposed, rubber insulation 2, the outer screen of conductive rubber 3.

The outer conductive screen 3 will separate from the insulation without damaging it.

The cable design has two ground conductors 4 of tinned copper wires without insulation and an auxiliary core 5 of copper wires in rubber insulation 6.

A rubber sheath reinforced with synthetic threads 7 is applied to the twisted cable cores. The outer sheath is made of rubber that does not spread combustion during a single installation.

In the center of the cable there is a rubber core based on polyester threads 8.

The technical result of the utility model is to improve the technical characteristics of the product.

The main factor of economic efficiency is an increase in cable reliability due to improvements in cable design.

The electrical safety requirement is ensured by the electrical resistance of the screens, insulation thickness, testing, and increased voltage.

Literature:

1. Information and technical collection. Cable products. Volume 1, part 2 Moscow. VNIIKP OJSC 2005

Claims (2)

1. Flexible shielded cable, consisting of three main shielded conductors with rubber insulation, two ground conductors and an auxiliary core, in a rubber sheath, characterized in that the outer sheath is reinforced with synthetic threads. 2. The flexible shielded cable according to claim 1, characterized in that the main conductive wires are made of tinned copper wire.