RU173088U1 - CABLE FOR PHOTO-VOLTAGE ELECTRICAL INSTALLATIONS - Google Patents

Abstract

The utility model relates to cable technology, namely, cables that do not propagate combustion, intended for the transmission and distribution of electrical energy in stationary photovoltaic electrical installations (for connecting solar panels to electrical networks), as well as for connecting individual modules with a DC / AC converter current. The cable for photovoltaic electrical installations contains a conductive core, insulation and sheath, while the insulation and sheath are made of silanol ivaemogo polyethylene with oxygen index of not less than 33% and with the amount of hydrohalic acids not more than 0.5 mg / g. The shell is made of silanol-crosslinkable polyethylene containing ultraviolet stabilizers.

Description

The technical field to which the utility model relates.

The invention relates to cable technology, namely, cables that do not spread combustion, intended for the transmission and distribution of electrical energy in stationary photovoltaic electrical installations (for connecting solar panels to electrical networks), as well as for connecting individual modules with a DC / DC converter alternating current.

State of the art

A cable is known for connecting solar panels to electrical networks for a rated alternating voltage from 660 to 1000 V, frequencies up to 400 Hz or a constant voltage of 1000 V, containing a conductive core made of copper or tinned copper wires, insulation made of ethylene-propylene elastomer and a sheath, made by oil and petrol resistant, wear resistant and flame retardant (product catalog http://elca-kable.ru/elkaflex-kgn-sun/).

Signs of the known cable, which are common with the features of the claimed utility model, are that the cable, designed to connect solar panels to electrical networks, contains a conductive core made of copper wire, insulation and sheath.

The reason that prevents obtaining the claimed technical result in a known cable is that the insulation of the conductive core is made of ethylene-propylene elastomer.

The closest known technical solution is a cable for photovoltaic electrical installations, which contains a core of tinned copper thin wires, insulation and a sheath of a copolymer with electronic crosslinking (product catalog http://kabel.com.ru/files/datasheet/olflex-solar -xlr-r.pdf).

Signs of a known cable, which are common with the claimed utility model, are that the cable contains a conductive core made of tinned copper wires, insulation and sheath.

The reason that prevents obtaining the claimed technical result in a known cable is the implementation of a cable with insulation and a sheath made of a copolymer with electronic crosslinking, which does not ensure non-propagation of the cable combustion.

Electronic crosslinking of the polymer is not the most optimal. Silane crosslinking technology is more productive and can be performed on virtually any extrusion equipment, in addition, the number of crosslinked molecules in the polymer during silane crosslinking is higher than during electronic crosslinking. Also, the material used for insulation and the sheath of the prototype does not provide non-proliferation of cable combustion.

The technical problem lies in the need to expand the arsenal of cables for photovoltaic installations, namely the development of a cable that does not propagate combustion and with a low level of emitted gases of halogen acids during combustion and decay.

Utility Model Disclosure

The technical result that mediates the solution of the indicated technical problem consists in the realization of the indicated purpose by combining two types of properties in the cable design:

1) in meeting the requirements of GOST IEC 60332-1-2-2007 and GOST IEC 60332-1-32011 on non-proliferation of combustion.

2) in meeting the requirements of GOST TES 60754-1-2011 on the amount of halogen acid gases emitted.

The technical result is achieved in that the cable for photovoltaic installations contains a conductive core, insulation and a sheath, while the insulation and sheath are made of silanol-crosslinked polyethylene with an oxygen index of at least 33% and with an amount of hydrohalic acids of not more than 0.5 mg / g.

Distinctive features of the claimed technical solution are that the insulation and the sheath of the cable are made of silanol-crosslinked polyethylene with an oxygen index of at least 33% and with an amount of hydrohalic acids of not more than 0.5 mg / g.

Utility Model Implementation

Within the claimed patent rights, the following embodiments of the utility model are possible.

The cable for photovoltaic installations contains a conductive core, insulation and sheath made of silanol-crosslinked polyethylene with an oxygen index of at least 33% and with an amount of hydrohalic acids of not more than 0.5 mg / g.

It is proposed to use a silanol-cross-linked compound based on polyolefins, halogen-free, fire-resistant and low smoke, with an oxygen index of at least 33% and emission of halogen acids of not more than 0.5% for the manufacture of insulation and cable sheaths. The use of this material for insulation and sheathing will ensure the non-proliferation of combustion during a single installation, and the reduced release of hydrohalic acids. In addition, the material for the cable sheath contains ultraviolet stabilizers, which provides the cable with resistance to sunlight.

The cable may contain a conductive core made of tinned copper wires.

The cable may contain a conductive core made of aluminum or aluminum alloy wires.

The cable sheath can be oil and petrol resistant.

The manufacture of the cable is as follows.

Conductors are made round, 5 classes of flexibility in accordance with GOST 22483, from tinned copper wire, traditional for electric cables, the strands are twisted using ordinary twisting equipment.

An insulation from silanol-crosslinked polyethylene is applied to the conductive core on the extrusion line. To conduct the process of crosslinking polyethylene, a crosslinking chamber is used in which the temperature is maintained at 90 ° C.

Further, on the insulated core on the extrusion line, a shell of silanol-crosslinkable polyethylene is applied. To conduct the process of crosslinking polyethylene, a crosslinking chamber is used in which the temperature is maintained at 90 ° C. The cable sheath is made in black.

The cable for photovoltaic electrical installations has been successfully tested under production conditions. Cable samples were tested for non-proliferation of combustion in accordance with GOST IEC 60332-1-2-2007 and GOST IEC 60332-1-3-2011, for the amount of halogen acid gases emitted in terms of HCl in accordance with GOST IEC 60754-1-2011.

The cable for photovoltaic electrical installations has also been tested for weather resistance, in particular UV resistance in accordance with ISO 4892-2-3-2013.

The cable for photovoltaic electrical installations has been successfully tested.

Claims (5)

1. Cable for photovoltaic electrical installations, containing a conductive core, insulation and a sheath, characterized in that the insulation and sheath are made of silanol-crosslinked polyethylene with an oxygen index of at least 33% and with an amount of hydrohalic acids of not more than 0.5 mg / g. 2. The cable according to claim 1, characterized in that the sheath is made of silanol-crosslinkable polyethylene containing ultraviolet stabilizers. 3. The cable according to paragraphs. 1 and 2, characterized in that the conductive core is made of tinned copper wires. 4. The cable according to paragraphs. 1 and 2, characterized in that the conductive core is made of aluminum or aluminum alloy wires. 5. The cable according to paragraphs. 1 and 2, characterized in that the shell is oil resistant.