Power cable VVGng LS, the technical characteristics of which confirm low smoke and, as a result, increased fire safety of the material.

Design features

The description of the design of the vvg ng ls electrical cable is given by GOST 22483. It includes a single-, two- or multi-wire copper conductor. As insulating material a polyvinyl chloride composition is used, characterized by a low fire hazard coefficient.

VVGNG technical power cables are available both round and flat. There can be a maximum of 5 current-carrying conductors in the wire. They are round and sectorial in shape. The conductors are insulated with polyvinyl chloride in a distinctive color. So, for example, the core responsible for zero is covered blue and the grounding is covered with a greenish-yellow PVC compound.

Conductive conductors are of 1-2 classes, twisted, the wire is filled with extruded PVC compound, characterized by low smoke and gas emission. In two- and three-core models, cores of the same cross-section are used, in four- and five-core wires, one core is smaller.

The thickness of the plastic compound should be at least 0.3 mm, the sector conductors can be left blank with an inner plastic compound sheath; it is enough to overlap with a polyethylene terephthalate film or a thermally bonded sheet. The outer covering is made of PVC composition.

Explanation of the abbreviation

• the letter A at the beginning of the abbreviation means that the material of the core is aluminum, if the letter A is absent in the name of the cable, then the core is made of copper;
• the first letter B indicates the material used for internal insulation, polyvinyl chloride is coded by this letter;
• the second B denotes the material from which the outer shell is made, it indicates polyvinyl chloride;
• the letter G indicates the absence protective coating(G - naked);
• the letters ng indicate that the wire does not support combustion;
• English letters ls (low smoke) inform that the wire has low smoke emission;
• the letter P means that the cable has an inner sheath made of thermoplastic polyethylene;
• the letters Bb indicate the presence of an armored coating made of steel tape;
• the letters Шв give information about the outer layer of the PVC hose.

VVGng cable: technical characteristics

• operating frequency - 50 Hz;
• laying of communications is carried out at temperatures above -15 ° C, without preheating;
• cables are operated in temperature conditions: from minus 30 ° С to + 50 ° С;
• when installing single and multicore cable vvgng ls allowed minimum radius bends in 7.5-10 outer diameters;
• long-term heating of conductors up to a temperature of +70 ° С is allowed;
• operating current with voltage up to 0.66 kV, wire with additional characteristics works at higher voltages;
• burning of the cable starts at a temperature of +400 ° С;
• manufacturers guarantee safe work cables for 30 years, subject to technological discipline, it is recommended to check the cables in use every 5 years for insulation damage;
• operation of communication is allowed in conditions high humidity and at high altitudes.

Decoding of other types of VVGng cable

• vvg - decoding: standard copper wire, with a single laying does not spread the flame, has polyvinyl chloride insulation of the inner and outer layers;
• vvgng hf - there are no halogens, the wire is used in group gaskets, taking into account the volume of combustible loading for rooms filled with working computer and microprocessor equipment, as well as in rooms visited by a large number of people;
• vvg png - decoding: core insulation is made of thermoplastic polyethylene, flat design, used for the manufacture of wiring in industrial buildings, non-flammable;
• vvgng p - conductors are laid in one plane, used for laying in the air on cable racks or blocks, without mechanical stretching;
• kvvgng ls - control cable, is fixedly connected to electrical appliances, devices and clamp assemblies, can be laid externally, in cable ducts and indoors, works in aggressive conditions, ensures fire safety of cable communications in group laying;
• vvgng-frls - cable vvgng frls analogue of the sample vvgng-LS, with increased fire resistance, this is confirmed by the decoding of the letters frls (Fire Resistance Low Smoke), characterized by reduced formation of smoke and gas, prevents combustion in group gaskets;
• nym cable - power wire, application: stationary laying inside industrial and domestic buildings of power and lighting lines. Nym wires stand for "standard cable in the German classification with PVC insulated with an outer sheath".

Weight and size parameters of VVGNG cables include:

• number of lived;
• section of veins in mm²;
• outside diameter;
• wire weight, kg / km. gnggi

An example of the weight and dimensions of a wire 3 × 1 5, 3 × 1: the number of conductors is 3 pieces, the cross-section of conductors is 1.5 mm².

The weight of the VVGNG cable for current with an operating voltage of 660 V and 1000 V differs by several kilograms.

For example: 1 km of wire vvgng 3 × 1 5 for a current with a voltage of 660 V weighs 96 kg, and for 1000 V - 122 kg.

Conclusion

The production of wires VVGNG has been established in almost every region of Russia. The cost of domestic products is much lower than imported products, with an equivalent quality. To attract a buyer, many manufacturers sell products directly from the factory, which allows for lower prices. For bulk purchases, various promotions, discounts, free shipping are provided.

Decoding (marking) Russian-made cables and wires

Decoding (marking) of abbreviations used to designate power cables with PVC (vinyl) and rubber insulation (according to GOST 16442-80, TU16.71-277-98, TU 16.K71-335-2004)

A - (first letter) aluminum conductor, if there is no letter - copper conductor.
AC - Aluminum core and lead sheath.
AA - Aluminum conductor and aluminum sheath.
B - Armor made of two steel tapes with anti-corrosion coating.
Bn - The same, but with a non-combustible protective layer (not supporting combustion).
b - Without a pillow.
B - (first (in the absence of A) letter) PVC insulation.
B - (second (in the absence of A) letter) PVC sheath.
D - At the beginning of the designation - this is a cable for mine workings, at the end of the designation - there is no protective layer over the armor or sheath ("bare").
d - Waterproof tapes for sealing the metal screen (at the end of the designation).
2d - Alumopolymer tape over the sealed screen.
Shv - Protective layer in the form of an extruded PVC hose (sheath).
Шп - A protective layer in the form of a pressed hose (sheath) made of polyethylene.
Shps - A protective layer of a self-extinguishing polyethylene extruded hose.
K - Armor made of round galvanized steel wires over which is superimposed protective layer... If it is at the beginning of the designation - the control cable.
C - Lead sheath.
O - Separate shells on top of each phase.
R - Rubber insulation.
HP - Rubber insulation and sheath made of flame retardant rubber.
P - Insulation or sheath made of thermoplastic polyethylene.
Ps - Self-extinguishing, flame retardant polyethylene insulation or sheath.
PV - Vulcanized polyethylene insulation.
BBG - Armor of profiled steel tape.
ng - does not support combustion.
LS - Low Smoke - low smoke and gas emission.
KG - Flexible cable.

Cable with BPI - impregnated paper insulation (according to GOST 18410-73):

A - (first letter) aluminum conductor, in its absence - copper conductor by default. If in the middle of the designation after the core material symbol, then the aluminum sheath.
B - Armor made of flat steel strips (after the symbol of the shell material).
AB - Aluminum armor.
SB - (first or second (after A) letter) lead armor.
C - The sheath material is lead.
О - Separately leaded core.
P - Armor made of flat galvanized steel wires.
K - Armor made of round galvanized steel wires.
B - Paper insulation with depleted impregnation (at the end of the designation) through a dash.
b - Without a pillow.
l - The pillow contains an additional 1 lavsan tape.
2L - The pillow contains an additional double lavsan tape.
n - Non-combustible outer layer. Placed after the armor symbol.
Shv - Outer layer in the form of an extruded hose (sheath) made of polyvinyl chloride.
Шп - The outer layer in the form of a pressed hose (sheath) made of polyethylene.
Швпг - The outer layer of a pressed-out hose made of low-flammability polyvinyl chloride.
(standby) - Cables with solid conductors (at the end of the designation).
У - Paper insulation with increased heating temperature (at the end of the designation).
C - Paper insulation impregnated with a non-flowing compound. Placed in front of the designation.

Control cable (according to GOST 1508-78):

A - (first letter) aluminum conductor, in its absence - copper conductor by default.
B - (second (in the absence of A) letter) PVC insulation.
B - (third (in the absence of A) letter) PVC sheath.
P - Polyethylene insulation.
Ps - Self-extinguishing polyethylene insulation.
D - Lack of a protective layer ("naked").
R - Rubber insulation.
K - (first or second (after A) letter) - control cable.
Chrome KG - flexible cable.
F - PTFE insulation.
E - At the beginning of the designation - power cable for especially mine conditions, in the middle or at the end of the designation - screened cable.

Hanging wires:

A - Bare aluminum wire.
AS - Aluminum-Steel (the word "steel-aluminum" is more often used) bare wire.
SIP - Self-supporting Insulated Wire.
ng - Does not support combustion.

Power, installation wires and connecting cords:

A - Aluminum, the absence of the letter A in the wire brand means that the current-carrying conductor is made of copper.
П (or Ш) - the second letter, denotes a wire (or cord).
R - Rubber insulation.
B - PVC insulation.
P - Polyethylene insulation.
H - Nairite rubber insulation.
The number of veins and the cross section are indicated as follows: put a dash; record the number of cores; put a sign of multiplication; record the cross-section of the vein.
In the brands of wires and cords, there may be other letters that characterize other structural elements:
D - Double wire.
O - Braid.
T - For laying in pipes.
P - Flat with a dividing base.
D - Flexible.

Installation wires:

M - Installation wire (placed at the beginning of the designation).
D - Stranded conductor (the absence of a letter indicates that the conductor is single-wire).
W - Polyamide silk insulation.
C - Film insulation.
B - Polyvinyl chloride insulation.
K - Nylon insulation.
L - Lacquered.
C - Fiberglass winding and braiding.
D - Double braid.
O - Polyamide silk braid.
E - Shielded.
ME - Enamelled.

Decoding (marking) of some special abbreviations:

KSPV - Cables for Transmission Systems in a Vinyl Sheath.
KPSVV - Cables Fire Alarm, Vinyl-insulated, Vinyl-wrapped.
KPSVEV - Fire Alarm Cables, with Vinyl insulation, with a Screen, in a Vinyl sheath.
PNSV - Heating wire, Steel core, Vinyl sheath.
PV-1, PV-3 - Vinyl-insulated wire. 1, 3 - flexibility class of the conductor.
PVA - Vinyl sheathed wire Connecting.
ШВВП - Vinyl-insulated Cord, Vinyl-sheathed, Flat.
PUNP - Universal Flat Wire.
PUGNP - Universal Flat Flexible Wire.

Rdecoding (marking) Cables and wires of foreign production

Power cable:
N - Indicates that the cable is manufactured according to the German VDE standard (Verband Deutscher Elektrotechniker - Association of German Electrical Engineers).
Y - PVC insulation.
H - Lack of halogens in PVC insulation (harmful organic compounds).
M - Installation cable.
C - The presence of a copper shield.
RG - Availability of armor.

FROR is an Italian cable with specific designations according to the Italian standard CEI UNEL 35011:

F - corda flessibile - flexible conductor.
R - polivinilclorudo - PVC - PVC insulation
O - anime riunite per cavo rotondo - round, not flat cable.
R - polivinilclorudo - PVC - PVC sheath.

Control cable:

Y - PVC insulation.
SL - Control cable.
Li - Stranded conductor according to the German VDE standard (see above).

Halogen free flame retardant cable:

N - Manufactured according to the German VDE standard (see above).
HX - Crosslinked rubber insulation.
C - Copper shield.
FE 180 - In case of fire, the integrity of the insulation, when using a cable without a fastening system, is maintained for 180 minutes.
E 90 - In the event of a fire, the cable remains functional for 90 minutes when laid together with the fastening system.

Installation wires:

H - Harmonized wire (HAR approval).
N - Conformity to national standard.
05 -Rated voltage 300/500 V.
07 - Rated voltage 450/750 V.
V - PVC insulation.
K - Flexible conductor for fixed installation.

XLPE insulated cables:

N - Manufactured according to the German VDE standard (see above).
Y - PVC insulation.
2Y - Polyethylene insulation.
2X - XLPE insulation.
S - Copper shield.
(F) - Longitudinal sealing.
(FL) - Longitudinal and transverse sealing.
E - Three-core cable.
R - Round steel wire armor.

How to decipher the brand of the cable?

Take, for example, a very common cable: AVVG (stand-by) -0.66 kV 4x35 and analyze its marking.

4x35 - this cable has 4 cores, 35 sq. Mm each. each one. The number of cores for most groups of cables is from 1 to 5. But for control ones, for example, from 4 to 37. Each core has a cross-section. The cable has a cross-section range from 1.5 to 800 sq. mm. for low voltage cable.

0.66 kV - voltage. For this cable, it is 660 V. Cables are low-voltage (0.38-1 kV), medium (6-35 kV) and high (110-500 kV) voltage.

(standby) - execution - single-core. This means that the vein is monolithic, seamless. If there is no "standby" in the brand, then this means, by default, that the execution is multi-wire (mn) or stranded (pl).

G - flexible or unarmored.

B - vinyl. Sheath made of polyvinyl chloride (PVC) plastic compound.

B - vinyl. Insulation made of polyvinyl chloride (PVC) plastic compound.

A - aluminum. Aluminum conductor.

All letter markings start from the core. If there is the letter A, then the conductive core is aluminum. If the letter A is absent, then the conductor is made of copper.

Depending on the group of use, the following symbols may appear in cable marking:

AVVG-P. Flat, insulated conductors are laid in parallel in one plane.

AVVGz. With filling, rubber compound filling.

AVVGng-LS. ng - non-flammable, PVC compound of low flammability. LS - "low tuxedo" (reduced smoke emission), PVC with reduced fire hazard.

AVBbShv.

B - armor made of steel strips

Ш - protective PVC hose.

c - vinyl. Insulation made of polyvinyl chloride (PVC) plastic compound.

ASB2lG, ASKl, TsSB.

C - lead sheath.

2L - two lavsan tapes

G - naked. Cover made of two galvanized steel strips.

K - a protective cover made of round galvanized steel wires.

C - paper insulation impregnated with a non-drip compound.

K - control

E - the screen is common from aluminum foil over twisted strands

APvBbShp.

P - silanol-crosslinked polyethylene insulation.

п - outer sheath made of polyethylene.

APvPu2g.

y - reinforced polyethylene sheath

2d - "double sealed", XLPE insulation with aluminum tape over the sealed screen.

KG - flexible cable.

Decoding of wire marking.

Now let's consider the question of how to decipher the marking of the wires. Wires, as well as cables, are marked with letters, after which the number and cross-sectional area of ​​conductive conductors are written in numbers. When designating a wire, the following structure is adopted. In the center, the letter P is placed, denoting the wire. The letter A can stand in front of the letters P, indicating that the wire is made of aluminum conductive cores; if there is no letter A, then the conductors are made of copper.

Following the letter P there is a letter characterizing the material from which the wire insulation is made:

Р - rubber insulation,

B - PVC (polyvinyl chloride) insulation

P - polyethylene insulation

If the wire has a sheath of varnished cotton yarn, then this is indicated by the letter L, and if the yarn is impregnated with an anti-rotting compound, then the letter in the wire brand is omitted. The letter L is placed in the last place in the designation of the wire brand.

Wires for electrical installations stamps

PV have digital indexes 1; 2; 3 and 4. These numbers indicate the degree of flexibility of the wires. The higher, the more flexible the wire.

Wires for overhead power lines are deciphered as follows:

SIP - self-supporting insulated wire. Light stabilized XLPE insulation.

SIP-1 - with non-insulated neutral

SIP-2 - with isolated neutral

SIP-4 - with insulated conductors of equal cross-section.

A - bare wire, twisted from aluminum wires

АС - bare wire, consisting of a steel core and aluminum wires

JSC "Plant" Energokabel "implements power cables of execution "-ng (A) -LS" own production. The plant is one of the Russian leaders in its market segment, strictly adheres to the standards of GOST and TU, and monitors the quality of products at every stage of the production process.

Power cables of "–ng (A) -LS" version: design features and scope of application

Cables of execution "-ng (A) -LS" have copper or aluminum conductors, insulation and sheath made of PVC-compound with low fire hazard with low smoke and gas emission (LS), flame retardant (-ng). Thanks to this design, the cables are suitable for group laying in objects with high demand to fire safety. If equipped with armor and an outer protective hose, the cables can be used for laying in the ground or where mechanical stress is possible.

VVGng (A) -LS cables are the most popular products from this series. Such cables are widely used for the installation of cable lines in 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 "–Ng (A) -LS" v different designs... The plant also offers fire-resistant conductors with additional thermal insulation of mica-containing tapes.

Benefits of cooperation:

• a wide range of cables of "–ng (A) -LS" design;
• favorable prices for cable products;
• wholesale and retail sales;
• custom cable production;
• strict adherence to production / shipment deadlines;
• delivery in the capital and in the regions.

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

New regulatory requirements developed in accordance with Federal Law No. 123 "Technical

Regulations on Fire Safety Requirements ", regulate the need for

Use of a fire-resistant cable during the installation of communication lines to ensure the required

System uptime in case of fire.

According to clause 4.1 of the set of rules SP 6.13130.2009 "Fire protection systems.

Electrical equipment. Fire safety requirements ":" cable lines of systems

Fire protection must be carried out with flame-retardant copper cables, not

Flame-spreading during group laying according to category A according to GOST R IEC 60332-3-22

Low smoke and gas emission (ng-LSFR) or halogen free (ng-HFFR) ".

Preferred areas of application of cable products, taking into account their type of execution

Defined in GOST R 53315-2009 and GOST R 53769-2010.

Preferred field of application of flame retardant cable

When designing security systems, often a cable with the end

In the ng -FRLS marking (for example, the KPSEng FRLS 1x2x0.5 cable), although it is more logical to use

Cable ng-FRHF (KPSEng FRHF 1x2x0.5).

The LS Index, which is an abbreviation of Low Smoke, literally means "reduced

Smoke emission "is apparently more understandable compared to the HF - Halogen Free index, that

Means halogen-free. Perhaps this is the reason why more widely

The ngFRLS cable is used than the ngFRHF flame retardant cable. Obviously the role is the same

What matters is that the price for the KPSEng FRLS cable is always slightly lower.

According to GOST R 53315-2009 with amendment No. 1 "Cable products. Requirements of the fire

Safety "cable ngFRLS is used" for laying, taking into account the volume of the combustible load

Cables, in internal electrical installations, as well as in buildings, structures and closed cable

Structures ", whereas fire-resistant cable ng FRHF -" for laying, taking into account the volume of combustible

Loads of cables, in internal electrical installations, as well as in buildings and structures with massive

The stay of people, including in multifunctional high-rise buildings and buildings

Complexes ".

Fire hazard class of cable

According to GOST R 53315-2009 in the designation of the fire hazard class:

• the first indicator is the limit of combustion propagation (O1 or O2 for a cable, tested individually, or P1 - P4 for a cable product tested during group laying)
• the second is the fire resistance limit;
• the third is an indicator of corrosiveness;
• the fourth is the toxicity indicator;
• the fifth is an indicator of smoke production.

So a cable with a declared fire resistance of at least 180 minutes, type ng (A) -FRLS (for example, KPSEng

FRLS 1x2x1) has a fire hazard class P1b.1.2.2.2

Cable type ng (A) -FRHF (for example, cable KPSEng FRHF 1x2x1) - has a fire hazard class

A1b.1.1.2.1. Accordingly, the use of the ng (A) -FRHF cable provides not only the minimum

Emission of corrosive gases, but also significantly less smoke emission compared to

Cable ng (A) -FRLS. Therefore, for complete clarity, the ng (A) -FRHF cable is correctly called

Flame retardant halogen-free and smokeless, flame retardant in group

Gasket.

Halogens, corrosivity and toxicity

NgFRLS cable (for example, KPSEng FRLS 2x2x1 cable) when exposed to high temperatures and

The flame gives off halogens. The most famous of them are chlorine and fluorine. These are poisonous substances and

Vigorous oxidizing agents that are corrosive, which severely limits the applicability

Such a cable. In case of fire, highly toxic gaseous chloride

Hydrogen, released from the cable insulation that collapses under the influence of temperature,

It spreads over the object and, connecting with water vapor, condenses in the form

Concentrated hydrochloric acid.

Values ​​of corrosiveness indicators of products admissible according to GOST R 53769-2010

Smoke and gas emission during combustion and smoldering of insulation, shell and protective materials

Hoses of cables with index LS and index HF differ 28 times!

Smoke emission

The ngFRLS cable (for example, the KPSEng FRLS 1x2x0.75 cable) is quite smoky - when it

Destruction in a flame in accordance with GOST R 53315-2009, a decrease in light transmission to 50% is permissible,

VVG ng ls cable- this is a subspecies of VVG cable, just like its "older" brother, intended for transmission and distribution electric current in conditions when, at a frequency of up to 50 Hz, a rated voltage of 0.66, 1 or 6 kV is applied in certain stationary installations. However, there are some differences. In particular, this cable is best suited for applications where the risk of fire is particularly high. We are informed about this by its marking.

Decoding of cable VVG ng ls

Its decoding is straightforward and, in fact, contains a description of the key technical characteristics product. "VVG" means "vinyl-vinyl-naked", which indicates that two layers of PVC are used and then no protective layer is present. The letters "ng" indicate that the cable is flame retardant. Well, "ls" means "Low Smoke", that is, in Russian, low smoke level. The absence of the letter "A" means that the cable in question is copper. By the way, don't be surprised if you come across a less familiar abbreviation frls - it's the same thing. Simply "fr" means "Fire Resistance", that is, resistant to fire, which is essentially the same as "ng". The use of VVG ng ls due to its properties becomes available in more places, especially in relatively hazardous industries.

Fire resistance test. Comparison with NUM cable

Flammability test of cables with and without the "NG" index.
1. plot: We burn cable NUM and VVGng-LS under equal conditions;
2. plot: We burn the NUM cable simulating the group laying;

In essence, this cable is not much different from - however, there are two differences. For example, in round cables (and the form factor of the conductor can be round, flat or triangular), a halogen-free filler is used, as well as uncured rubber, which has a very good degree of fire safety. Also, a special PAH is used for the cable sheath, which has anti-flammable properties, in contrast to.

Otherwise, the number of cores can vary from one to six, their cross-sections can reach 240 mm 2, the diameter also changes in proportion to the cross-sectional area, the permissible current, depending on the type and number of cores, can vary from 21A to 704A, but the mass can vary from approximately 40 kg / km up to several tons for the same one kilometer. If you decide to buy such a cable, carefully read its description in the store - after all, you may come across a product with the wrong characteristics that you need. The price varies greatly from the characteristics, and the cost can grow hundreds of times if the number of veins and their total area... The traditional service life of such a product is more than thirty years, of which five are usually guaranteed.

Temperature range when using VVGng: from -30 ° С to + 50 ° С

Relative humidity should be up to 98% at +35 degrees Celsius.

Minimum bending radius when laying

• single-core cables - 10 outer diameters,
• multicore cables - 7.5 outer diameters.

For a long time admissible temperature heating of cable cores during operation: + 70 ° С

The limiting temperature of the current-carrying conductors of cables according to the condition of non-combustion of the cable at short-circuit: + 400 ° С