RU39215U1 - CABLE FOR MOBILE COMPOSITION WITH INSULATION FROM THERMOELASTOPLAST - Google Patents

Abstract

The utility model relates to the cable industry of the electrical industry and can be used for internal and external connections of electrical equipment of rolling stock of rail and urban electric vehicles and the subway. The developed cable of the KPSTVM brand is intended for connection to moving current collectors, installation with limited movements and fixed installation at a rated alternating voltage of 660 V of frequency up to 400 Hz or a constant voltage of 1000 V under the influence of lubricating oils and diesel fuel. The main factors of economic efficiency are: - cost reduction cables through the use of cheaper materials; - high elasticity of the insulation material at low temperatures, which facilitates laying and cable operation in winter; - high specific insulation resistance, which ensures electrical safety of the cable.

Description

The utility model relates to the cable industry of the electrical industry and can be used for internal and external connections of electrical equipment of rolling stock of rail and urban electric vehicles and the subway.

Analogs of the development can be considered a cable brand KPSTVM (Publication number 13516).

The development advantage is:

- higher specific electrical insulation resistance;

- higher frost resistance, elasticity of the insulation material at positive and negative temperatures, which facilitates the laying and operation of cables in winter.

The developed cable of the KPSTVM brand is designed for fixed mounting, mounting with limited movement and for connecting to movable current collectors

Technical specifications

The minimum allowable bending radius of the cable during installation and installation must be at least three nominal outer diameters of the cable. The bending radius during operation is at least five nominal outer diameters of the cable.

The electrical insulation resistance of the cable, calculated per 1 km of length and a temperature of 20 ° C - at least 10 megohms.

Mechanical Requirements

The cable is resistant to alternating bends at an angle of π / 2 rad at a temperature of minus 50 ° C with a minimum bending radius equal to five outer diameters of the cable, after preliminary twisting around the longitudinal axis by an angle of ± π. The number of test cycles is not less than 20.

The cable is resistant to bending with twisting through an angle of ± 0.07 k at a temperature of minus 50 ° C. The number of test cycles is at least 12,000.

The cable is resistant to vibration with a frequency of 1 to 100 Hz with acceleration of sinusoidal vibrations up to 50 m / s ² and an amplitude of 1.5 mm at a transition frequency of 30 Hz.

The cable is resistant to repeated impacts with acceleration up to 150 m / s ² . The cable is burst resistant.

External exposure requirements

The cable is resistant to high ambient temperatures up to plus 70 ° С.

The cable is resistant to low ambient temperature in conditions of installation and operational bends not lower than minus 50 ° С.

The cable is resistant to changes in ambient temperature from minus 50 ° С to plus 70 ° С.

The cable is resistant to relative humidity up to 98% at temperatures up to 40 ° C.

The cable is resistant to lubricating oils and diesel.

The cable is resistant to rain, dynamic abrasive dust and frost. The cable does not spread combustion. The cable is resistant to ozone.

Reliability Service life of wires in the conditions and conditions of ND:

not less than 8 years - for cables intended for connection to movable current collectors;

at least 15 years - for cables intended for fixed installation.

The developed cable of the KPSTVM brand has thermoelastoplast (TEP) based on styrene block copolymers as insulation.

Cable design is shown in Fig. 1

Copper conductive cable conductors meet the requirements of GOST 22483 not lower than class 4.

Conductors (1) are coated with thermoplastic elastomer (2).

The insulated cable conductors are twisted with a midwind and wrapped with a thermally bonded cloth, or with a rubberized fabric tape, or with a stiff calico (3).

In each coil, two adjacent counted insulated conductors differ in color from each other and from the rest of the coil.

Digital marking of insulated cores or counting pairs is allowed.

A sheath of polyvinylchloride plastic compound has been applied over twisted insulated cable cores (4).

The main factors of economic efficiency are:

- reduction in the cost of cables due to the use of cheaper materials;

- high elasticity of the insulation material at low temperatures, which facilitates the laying and operation of cables in winter;

- high specific insulation resistance, which ensures electrical safety of the cable.

The electrical safety requirement is ensured by insulation thickness, overvoltage test.

Literature:

1. Publication 13516, registration number 99123038/20, name CABLE

2. TU 2243-005-21346056-2000 "Flexogran"

Claims (2)

1. Cable for rolling stock with thermoplastic elastomer insulation, containing conductive conductors twisted by a twisted twist, each of which is coated with a polymer material insulation, and a sheath of polyvinyl chloride plastic compound located on top of the twisted conductive conductors, characterized in that the polymer insulation is made of styrene-based thermoplastic elastomer block copolymers. 2. Cable for rolling stock with insulation from thermoplastic elastomer according to claim 1, characterized in that it further comprises a separator of thermally bonded fabric or rubberized fabric tape located between twisted conductive cores and the sheath.