Power cables execution -ng-LS. VVGng LS cable specifications

Wire and cable VVGng LS is the top of the family of cable products with the abbreviation VVG, the secret of its privilege is the postscript LS, what it indicates and what it hides, we will analyze in detail in this article.

Smoke in the premises is considered the most important factor, which increases the risk of negative consequences in case of fire. In the event of a fire at industrial facilities and large public buildings, cable routes become one of the main sources of smoke. The sad experience of the Ostankino television tower, the Manege and other disasters of the last decade only confirmed this truth.

Currently, technical regulation documents strictly regulate the types of cable products that can be used for group laying inside public and industrial premises (GOST R 5315-2009). Here, in addition to the condition of non-propagation of combustion (-ng), one of mandatory requirements there was a low smoke and gas emission during combustion or smoldering of the cable.

Designation LS, order of assignment

The decoding of VVGng LS is as follows:

• There is no letter A at the beginning of the marking, which means the cable is copper;
• B - the outer insulating layer consists of PVC insulation;
• B - core insulation consists of PVC insulation;
• ng - does not spread combustion with single and group laying;
• LS- L ow S moke (translated from English light smoke)

In the marking VVGng (..)-LS, after the category through a hyphen is the designation LS, indicating low smoke and gas emission ( L ow S moke). Of course, such an index can be assigned to a cable only in case of a successful test for such an indicator. The standard test procedure for smoke generation during combustion and smoldering, installation description, etc. are given in GOST R IEC 61034 -1 (2) -2005.

The principle of the test is to measure the transparency of the air in the chamber with the cable before and after combustion. The smoke resulting from the combustion of the sample reduces the light transmission of the volume, which is recorded by the instruments. The result of the test will be the ratio of light transmission before and after the experiment, expressed as a percentage. In accordance with GOST R 53769-2010, it is considered that the cable has successfully passed the test if the smoke has reduced transparency by no more than 40%. In this case, the manufacturer has the right to put the LS index in the marking.

Cable insulation with low smoke emission

For the production of VVGng LS cable, PVC compounds of reduced fire hazard, moreover, in contact with fire, they should not give a large number smoke. In addition, it is required that the smoke be minimally toxic (the toxicity index is not more than 40 mg / m 3 according to GOST R 53769-2010).

The task is difficult, but it was successfully solved by selecting special additives - antipyrines and additives. Today, such plastic compounds are produced both in Russia and abroad. Domestic manufacturers have registered several TUs, for example TU 2246-001-25795756-2009, and produce plastic compounds based on them, specialized for core insulation, internal filling and outer sheath (grades PPI 30-30, PPV-28, PPO30-35, respectively).

Cable structure VVGng LS

The composition and arrangement of the elements of the VVGng (..) -LS cable is no different from its counterparts - cables with copper conductors, with PVC insulation and sheath according to GOST 53769-2010. External similarity is clearly visible in the image shown in this section.

Cable VVGng(..)-LS can be round and flat, maximum amount lived five. The cores themselves can be single-wire or multi-wire, round or sector. The nominal values ​​​​of the cross-sectional areas are selected from a single standard series for all.

VVGng LS cable specifications

Since the characteristics of the entire family of cables with PVC core insulation and sheath are standardized by one standard GOSTR 53769-2010, they vary only within small limits for different manufacturers. The standard does not introduce separate indicators for the cross-sections and shape of the cores, the thickness of the insulation of conductors and sheaths, electrical resistance, etc. for cables with insulation made of plastic compounds with reduced smoke generation. They go along with the whole family of PVC compounds. Separate values ​​are given for XLPE insulation, etc.

GOSTR 53769-2010 provides for -LS products some difference in minimum tensile strength, it may be less than that of VVG, but does not differ from VVGng. Therefore, the section "VVGng LS cable specifications"in terms of general characteristics, it practically does not differ from the section of the same name in the article, the cable of the VVG brand. Familiarize yourself with general characteristics VVGng(..)-LS is possible.

Application of cable VVGng(..)-LS

Cables VVGng - LS related to fire hazard classes P1.8.2.1.2 and

P1.8.2.2.2 can be used for group laying in residential and public buildings, internal and external cable structures on industrial enterprises. It is allowed to use the cable at nuclear facilities.

Other cable options

• - round copper wire with PVC insulation of the outer and inner layers, has low gas and smoke emission during combustion in single and group laying;
• VVG-P - the same as VVG, but flat design;
• - round copper wire with PVC insulation of the outer and inner layers, has low gas and smoke emission during combustion with a single laying;
• VVGng-P - the same as VVGng, but flat design;
• VVGng-ls - round copper wire with PVC insulation of the outer and inner layers, has low gas and smoke emission during combustion in single and group laying;
• VVGng-Pls - the same as VVG-ls, but flat design;
• VVGng-frls - round copper wire with fire-resistant PVC insulation of the outer and inner layers, has low gas and smoke emission during combustion in single and group laying;
• VVGng-Pfrls - the same as VVGng-frls, but flat design.

JSC “Plant “Energokabel” implements power cables of "-ng(A)-LS" version own production. The plant is one of the Russian leaders in its market segment, strictly complies with GOST and TU standards, and exercises product quality control at every stage of the production process.

Power cables of "-ng(A)-LS" version: design features and applications

Cables of "-ng(A)-LS" version have copper or aluminum conductors, insulation and sheath made of low fire hazard PVC compound with low smoke and gas emission (LS), flame retardant (-ng). Thanks to this design, the cables are suitable for group laying at facilities with high requirements for fire safety. In the presence of armor and an external protective hose, the cables can be used for laying in the ground or where mechanical impacts are possible.

VVGng(A)-LS cables are the most popular products from this series. Such cables are widely used for installation of cable lines at industrial facilities, including nuclear power plants, as well as in residential and public buildings.

Sale of power cables of execution "–ng(A)-LS"

In JSC “Plant “Energokabel” you can buy power cables of the design "–ng(A)-LS" in various designs. The plant also offers fire-resistant conductors with additional thermal insulation with mica-containing tapes.

Benefits of cooperation:

• a wide range of cables of "-ng(A)-LS" version;
• favorable prices for cable products;
• wholesale and retail sales;
• production of a cable under the order;
• strict observance of terms of production/shipment;
• delivery in the capital and regions.

To buy cable version "-ng(A)-LS" in Moscow, please contact Energokabel Plant JSC. You can make a purchase directly on the site through the basket or the "Quick order" button. To speak with a specialist, call +7 (495) 221–89–93 or ask a question via the feedback form.

The VVG-ng cable is a representative of a fairly wide group of conductive products used to provide electricity production shops and offices, for laying in walls, pipes and tunnels, for street lighting. Any electric installation work in the construction of private housing or multi-storey buildings require the use of this particular type of material. The VVG-ng cable is designed for laying in places where it is necessary to avoid fire. It consists of conductive copper filaments enclosed in an insulating sheath and covered with a common film on top. All cable components are designed to continue delivering electricity to its intended destination in the event of a fire.

Types of VVG-ng cable and its marking

Products marked VVG-ng include several types of cable that differ in their characteristics. In order to distinguish each of them, a marking was invented, including information on the composition of the conductive thread and its cross section, on the insulating sheath and its properties, and on the features of the cable.

So, the abbreviation VVG-ng means:

• Thread material - copper (by default). If the thread is aluminum, then the letter A (AVVG) is in front of the designation
• BB - means that PVC compound was used to insulate copper threads and the outer sheath of the cable
• G - means "naked". The cable has no protective coating in the form of a metal plate or other material. Such protection is present in products with a larger cross section.
• ng - means "non-combustible", does not spread combustion when laid alone and in a group. Cable manufacturing technology helps to limit its ignition. Such a cable does not burn in a fire, but melts.

When designating products, other signs can also be used:

• VVG-ng-LS - cable has low smoke emission (LS)
• VVG-ng-NF - cable insulation does not contain halogen materials (NF)
• VVG-ng-P - the cable has a flat shape and can be used for laying under plaster (P), it is fire resistant
• VVG-ng-FRLS - the cable is fire resistant (FRLS) and in the event of a fire will continue to supply electricity for a certain time (usually 60-180 minutes)

Along with letters numbers are used when marking the cable. They reflect the number of copper threads and the cross-sectional area of ​​​​one thread in square millimeters:

• Marking VVG-ng-LS 3 x 50 + 1 x 25 means that the cable has two sheaths made of PVC plastic (copper strands sheath and a common outer sheath - VV), has no protection (G), has low flammability (ng) and low emission smoke (LS). The number of copper threads is 3 with a section of 50 mm (3x50), and one thread has a section of 25 mm (1x25)

The marking also includes the operating voltage of the cable. It is indicated in kilowatts, for example:

• VVG-ng-LS 3 x 50 + 1 x 25 -1 operating voltage of this cable is 1 kV (number 1 in the marking)

The VVG-ng cable is a universal conductive product used in wet conditions and at altitudes up to 4300 meters. Application temperature ranges from +50 to -50°С, maximum permissible humidity- 98% (at +40°С).

Power cables with plastic insulation, flame retardant, with low smoke and gas emission for voltage up to 1 kV (ng-LS) TU 16.K71-310-2001

Application area
For transmission and distribution electrical energy in stationary installations at an alternating voltage of 0.66 and 1 kV and constant voltage up to 1 kV. Cables are manufactured for general industrial use and for nuclear power plants when supplied to the domestic market and for export. For use in NPP systems of classes 2, 3 and 4 according to the classification OPB-88/97 (PNAEG-01-011-97). View climatic version cable UHL-T, placement category 5 according to GOST 15150-69.
The cables are recommended for use in the construction of residential buildings, public facilities, nuclear power facilities, subways. Cables correspond to the best foreign analogues.

Cables are made 1, 2, 3, 4, 5-core (A)
	(A) VVGng-LS Copper or aluminium, solid or stranded, round or sector sealed conductor Extruded PVC insulation with reduced fire hazard Outer sheath made of low fire hazard PVC
	(A) VBbShvng-LS Cores - single-wire or stranded copper (VBbShvng-LS) or aluminum (AVBbShvng-LS) conductor Insulation - PVC compound of low fire hazard Low flammable PVC inner sheath Armor made of two galvanized steel strips Outer sheath - PVC compound of low fire hazard

* With round conductors.

Power cables with PVC insulation, flame retardant, with low smoke and gas emission for a voltage of 6 kV TU 16.K10-016-2003

Application area
For transmission and distribution of electrical energy in stationary installations with alternating voltage up to 6 kV. Cables are manufactured for general industrial use and for nuclear power plants when supplied to the domestic market and for export. For use in NPP systems of classes 2,3 and 4 according to the classification OPB-88/97 (PNAEG-01-011-97). Type of climatic version of the cable - B, placement category 5 according to GOST 15150-69.
terms of Use
VVGng-LS, AVVGng-LS, for laying in fire hazardous premises, provided there is no danger of mechanical damage. VBBVng-LS, AVBVng-LS-for laying in cable structures and premises, incl. in fire hazardous areas in the absence of tensile forces during operation.

Main technical and operational characteristics

Power cable with flame retardant polyvinyl chloride insulation for alternating voltage up to 0.66 kV, frequency 50 Hz NYMng-LS TU 3521-039-05755714-2007

Application area
The cable is intended for transmission and distribution of electrical energy in stationary installations for alternating voltage up to 0.66 kV with a frequency of 50 Hz. PRGP1.
terms of Use
The cable is intended for the installation of electrical wiring and cable lines in industrial, residential and public buildings and structures, as well as in cable structures to ensure the safe operation of electrical equipment of protection class 1 of electrical safety along with cables of the VVGng type. The cable can be used for laying power and lighting networks in explosive zones of classes V-1b, V-1g, V-IIa, as well as for lighting networks in explosive zones of class B-Ia.

Main technical and operational characteristics

Liver colors

Information provided by JSC "Sevkabel-Holding" specifically for the site

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For reference: The "Reference" section on the site is intended for informational purposes only. The directory was compiled by sampling data from open sources, as well as thanks to information from cable manufacturers. The section is constantly updated with new data, and is also being improved for ease of use.

List of used literature:

Electrical cables, wires and cords.
Directory. 5th edition, revised and enlarged. Authors: N.I. Belorussov, A.E. Saakyan, A.I. Yakovleva. Edited by N.I. Belorussov.
(M.: Energoatomizdat, 1987, 1988)

“Optical cables. Manufacturers. General information. Structures, equipment, technical documentation, certificates»
Authors: Yury Timofeevich Larin, Anatoly Alexandrovich Ilyin, Victoria Alexandrovna Nesterko
Year of publication 2007. Publishing house LLC "Prestige".

Directory "Cables, wires and cords".
Publishing house VNIIKP in seven volumes 2002.

Cables, wires and materials for the cable industry: A technical guide.
Comp. and editing: Kuzenev V.Yu., Krekhova O.V.
M.: Publishing house "Oil and gas", 1999

Cable products. Directory

Installation and repair of cable lines. Electrician's Handbook
Edited by A.D. Smirnova, B.A. Sokolova, A.N. Trifonova
2nd edition, revised and enlarged, Moscow, Energoatomizdat, 1990

Each strategically important facility is unlikely to be able to do without the use of fire-resistant cable. It is used as a high-tech tool for the transmission and distribution of electricity and signals. Flame-retardant, non-combustible cable - an indispensable part fire fighting systems, smoke protection and warning and evacuation systems.

Application area

Fire-resistant cable products with low smoke emission KSRV ng(A)-FRLS and KSREV ng(A)-FRLS (similar to KPSEng (A)-FRLS, KPSng (A)-FRLS) are intended for group and single laying in various systems fire safety: management of evacuation in case of fire, fire alarm, emergency notification, fire detection, ventilation systems and means of automatic fire extinguishing. This cable product remains operational for three hours in a fire. Very successfully used to maintain the level of fire safety in industrial enterprises, shopping malls, medical and educational institutions, high-rise buildings and office premises.

In rooms, the cable can be laid in special channels, along blocks, walls, ceilings, on supporting structures, hidden or open methods.

Description of cable products

KSRVng(A)-FRLS cable is a cable of pair twisting, with single-wire copper conductors (diameter - 0.5, 0.80, 0.97, 1.13, 1.38 mm). Covered with insulating, ceramized silicone rubber, sheathed with PVC-compound with fire hazard reduction properties and minimal combustion toxicity.

Cable KSREV (A)-FRLS has all of the above characteristics, but in addition this type of cable provides a screen made of aluminopolymer tape, which performs the function of protection against electromagnetic interference.

Regulatory Compliance

The fire-resistant cable fully meets the requirements of all regulatory documents, including the "Technical Regulations on Fire Safety" GOST R 53315. The products are certified according to the class P1 b fire safety system. 2.2.2. the GOST standard mentioned above.

Cable Specifications

• Fire resistance of the cable in case of fire - 180 minutes;
• Operating temperature range from -40 to +70 °C;
• Operation of cables at alternating voltage - 250V;
• Work of cables in conditions direct current- 300V;
• The maximum service life is 20 years;
• Manufacturer's warranty - 12 months.

Advantages of fire resistant cable products

The advantages of fire-resistant cables KSRV ng(A)-FRLS and KSREV ng(A)-FRLS are obvious. They do not propagate the combustion process both singly and in a beam. Able to perform their functions in case of fire for a long time. Also an important advantage is that the cable does not emit hazardous to human health during combustion. chemical substances: fluorine, bromine, chlorine and other corrosive gases.