RU31683U1 - Power cable of APvzBbShp, PvzBbShp grades with insulation from crosslinked polyethylene - Google Patents

Description

1. Description of the utility model 1.1. Name of the utility model “Power cable brands APvzBbShp, PvzBbShp with insulation

from silanol-cross-linked poly (ethylene)

1.2 The technical field to which the useful

Power cables with aluminum or copper conductive conductors, with insulation made of silanol-cross-linked polyethylene, with filling of the central and inter-core space of a twisted core, with protective covers of the BbShp type, designed for transmission and distribution

electrical energy at an alternating voltage of up to 1 kV with a nominal frequency of 50 Hz in networks with isolated or grounded neutral at facilities with high levels of energy consumption and load density.

Preferred areas of application:

Power cables of the types APvzBbShp and PvzBbShp are used for laying in soils (trenches), including corrosive and with high humidity, with the exception of heaving and subsidence soils.

2 O O 3

model.

The closest in essential features analogue of the claimed utility model is a power cable with plastic insulation.

Information about analogues is taken from the Technical Specifications of TU 16.K71-277-98, entered into force on 01.01.1999. Information was also used from the official publication “Power cables with plastic insulation. Technical conditions, IPK Publishing House of Standards, Moscow, 1999. and the technical reference book “Cables, wires, materials for the cable industry. Publishing house “Oil and Gas of the Russian State University of Oil and Gas named after I.M. Gubkina, 2nd edition, 2001.

The purpose is the same as that of the claimed utility model, namely: transmission and distribution of electrical energy at alternating voltage up to 1 kV.

Power cable design elements: conductive conductors, insulation, protective cover.

Signs of an analogue that coincide with the essential features of a power cable with insulation made of silanol-cross-linked polyethylene:

- copper or aluminum conductive conductors;

- insulation of conductive veins from silanol-cross-linked polyethylene;

-babshp type protective cover

A power cable with plastic insulation with a protective cover like BbShp is used for laying in the ground (trenches).

also in conditions of possible emergency situations of water supply and sewer pipes in residential microdistricts, it is required that the cable laid in the ground can withstand moisture, while maintaining operability. However, the design of the analogue does not allow to achieve complete moisture impermeability of the cable, which can lead to damage to the structural elements of the cable and disable it.

To meet the increased demands of consumers, eliminate the shortcomings of a similar cable and expand the possibilities of using cables, the design of the power cable was improved by introducing the filling of the central and inter-core space of the twisted core.

1.4. The essence of the utility model

Power cable with insulation made of silanol-crosslinked polyethylene of the types APvzBbShp and PvzBbShp is designed for

in order to prevent the possibility of penetration of water into the core of the cable, including during repair work.

The technical result is to prevent the possibility of water penetrating into the core and the spread of moisture through the core, which eliminates damage to the structural elements of the cable, prevents a short circuit in the circuit, and as a result - maintain the cable’s performance in high humidity.

--Wl - FJ b / O-Essential feature of the utility model that affects the achievement of the above technical result and distinguishes the utility model from the analogue - twisting of isolated conductors around the core of rubber and the imposition of an inner shell of unvulcanized rubber mixture while filling the gaps between the isolated conductors.

Requirements that a power cable with insulation made of silanol-cross-linked polyethylene grades satisfies

APvzBbShp, PvzBbShp:

reliability in operation;

stability of electrical parameters.

1.5. The list of drawings and other materials.

The drawing shows:

figure 1 - diagram of a power cable with insulation made of silanol-cross-linked polyethylene grade ApvzBbShp 4x10-1;

1.6 Information confirming the possibility of implementation

utility model.

Description of the design and method of manufacturing a utility model - power cable with insulation from silanol-cross-linked polyethylene of grades APvzBbShp PvzBbShp:

22483 - 77 and corresponding to classes 1 and 2. Multiwire round strands are twisted from separate wires according to the system of regular coiled twisting, the direction of twisting of the upper coiled is right; wire strands have alternating twisting directions. The cores do not have burrs, cutting edges, bulging and breaks in individual wires that could damage the insulation; cables are made of four-core with conductive conductors with a cross section of 10-240 mm. Cables have all veins of equal section or one (zero) smaller section; conductive conductors are insulated with silanol-cross-linked polyethylene, the insulation thickness depends on the nominal section of conductive conductors. Insulated conductors have a distinctive solid or strip colors, at least 1 mm wide; insulated conductive conductors twist around the core of rubber; on top of twisted veins, an inner shell of unvulcanized rubber compound is applied while filling the gaps between the isolated veins; over the inner shell impose a belt insulation of polyethylene with a thickness of at least O, 9 mm; a protective cover of the BbShp type is applied over the waist insulation in accordance with GOST 7006-72, including armor from steel galvanized tapes and a protective hose made of polyethylene; R s m

ht) W A distinctive index of the manufacturer and the year of manufacture of the cable should be applied to the plastic protective hose no more than every 300 mm, let us consider a specific example of the manufacture of the cable .1 PO3.1) of a round shape with a cross section of 10 mm is covered with insulation (Fig. 1, pos. 2) from silanol-cross-linked polyethylene with a nominal thickness of 0.7 mm; insulated conductors are twisted around the core of rubber (Fig. 1, pos. 3), on top of twisted insulated conductive conductors, an inner sheath of unvulcanized rubber compound is applied while filling the gaps between the insulated conductors; the minimum thickness of the inner shell of 0.1 mm (Fig. 1 pos. 4) over the inner shell impose a belt insulation of polyethylene with a thickness of at least O, 9 mm (Fig. 1, pos. 5); a protective cover of the BbShp type, consisting of 2 steel galvanized tapes (Fig. 1 pos. b) with a thickness of 0.3 mm and a protective hose (Fig. 1 pos. 7) from polyethylene with a nominal thickness of 2.2 mm, is applied to the waist insulation.

ZI (5

The power cable is connected to electrical devices, apparatuses, clamp assemblies of electrical switchgears. Under the action of the supplied voltage, an electric current arises, which, distributed throughout the entire cross section of the conductive core, is transmitted from the source to the consumer. Insulation creates a geometrically stable insulating gap, which protects the cores from a short circuit in the circuit, as well as for safety reasons - from electric shock. Twisting insulated cores around a rubber core and applying an inner sheath of unvulcanized rubber compound while filling the gaps between insulated cores prevents moisture from spreading inside the core and across the cable core. Filling gives the cable a round shape close to cylindrical. Belt insulation made of polyethylene carries additional protective and insulating

functions, including damage. Galvanized steel tape armor provides protection against mechanical damage, protects the cable from damage by rodents, etc. A protective hose made of polyethylene protects the structural elements of the cable from exposure to light, moisture, low temperatures, various chemicals, and also protects against mechanical damage.

Description of structural elements, thanks to which Bhm it becomes possible to obtain a technical result.

To achieve a technical result, ensuring resistance to aggressive environments (high humidity), resistance to moisture penetration into the core of the cable, maintaining stable electrical characteristics during the life of the cable, unvulcanized rubber compound is used as a filling material for the inter-core space, and rubber as a central filling.

The use of power cables with insulation made of silanol-crosslinked polyethylene for transmission and distribution of electricity at facilities with high levels of energy consumption and load density solves the problems of reliable power supply, optimizes the network circuit, significantly reduces the cost of reconstruction and maintenance of cable lines, increases the reliability of cable networks.

Claims (1)

Power cable АПвзБбШп, ПвзБбШп with insulation made of silane-crosslinked polyethylene, containing twisted aluminum or copper conductors, insulated with silane-crosslinked polyethylene, belt insulation made of polyethylene, protective cover, consisting of two galvanized steel strips and a protective polyethylene hose, which insulate around the core of rubber and over twisted cores an inner shell of unvulcanized rubber compound is applied with simultaneous filling gaps between insulated conductors.