Technical characteristics of PVS and KSPV cables, areas of their application, service life

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KSPV cable is a signal conductor that is used to deliver an electrical signal to consumers. As a rule, it is used to connect alarm systems and use them in communication and communication systems. In this article we will make a detailed review of the conductor, recall its main technical characteristics and talk about its scope.

Decoding

The KSPV cable received the following abbreviation:

• K – cable.
• SP – designed for transmission systems.
• B – has a vinyl shell.

The cable is actively used during the installation of fire and security alarms. Its popularity is due to its fairly low price and acceptable characteristics.

Let's pay attention! The KSPV cable is an analogue of JY (St) Y Lg and J-YYBd. But these conductors have a higher cost, so it is better to use our conductor now, especially since it is in no way inferior in its main characteristics.

What is KSPV wire

Modern power electrical and network cables have an abbreviation, the decoding of which gives a clear and accurate idea of ​​the product. The KSPV cable is no exception; its decoding means the following:

• K – cable;
• C – connections;
• P – has insulation made on the basis of polyethylene;
• B - in a vinyl shell.

In other words, KSPV is a multi-core cable, the main purpose of which is to transmit an electrical signal to the consumer. This product is used in transmitting an alert signal for alarm, fire, security and other types of installations in a subscriber communication and messaging system. It transmits information about the current position of the controlled object and today is mandatory in a number of industries. This type of wire differs in technical characteristics and scope of application from conventional power cables.

KSPV cable

Design

The conductor has single-wire copper strands that have a diameter of 0.40 to 0.80 mm. Between themselves, all conductors received special insulation made of polyethylene; it received additional protection in the form of PVC plastic. All this ensures reliability and allows the use of KSPV during internal installation.

Please pay attention! There is a modification of KSPV - this is the KSPEV cable. It received an additional screen, which is made of aluminum-plastic tape with a longitudinal drainage core made of tinned copper conductor. Other characteristics are the same.

Specifications

Among the main technical characteristics, the following should be highlighted:

1. The operating temperature of the conductor ranges from -40 to +70 degrees, which makes it truly universal.
2. The maximum permissible air humidity is 95% at a temperature of 35 degrees.
3. The average service life is 15 years.
4. The minimum bending radius is 10 outer diameters.
5. The conductors are copper, but there are modifications with aluminum.
6. The diameter of the cores is from 0.40 to 0.80 mm.

You should also highlight several other important characteristics; in the table you will find: diameter, weight, size and other important parameters.

This table contains the main parameters of SPVP:

Here are the technical characteristics of the KSPEV cable.

PVS: general information and description

The name of this cable is deciphered as follows: connecting wire in a PVC sheath.

PVS wire belongs to the category of power products, it is used for such purposes as:

• production;
• household needs;
• electrification of entire settlements.

The predecessors of PVS were armored cables with double insulation and a flexible metal core. Thanks to them, at the beginning of the last century, it was possible to transmit electricity over long distances and support the operation of large industrial facilities of that time.

A modern PVA cable is equipped with polymer insulation for wiring and has two or more solid copper electrical cores wrapped in a special cotton or paper sheath, which, in turn, can be pre-treated with fire-resistant substances. In addition, the wire is often equipped with tar , so the threads do not rust. The following models are amenable to this processing:

• APPVS;
• SHVVP;
• PUGNP;
• VVG and others.

When used for a long time, the connecting cable equipped with rubber insulation becomes brittle due to exposure to atmospheric oxygen. It is necessary to check from time to time what condition it is in and carry out a number of preventive measures, for example, lubricating it with tar and other protective agents. To ensure that it serves you for the longest possible time, choose a wire with a rubber sheath, and not just PVC-based insulation.

There are also wires on sale with only rubber protection, but they are not used in everyday life or in production.

Applied metal: copper and aluminum

The design of this cable is practically no different from other wires with two or more cores. Thus, two strands or more are enclosed in insulation and intertwined with each other to create improved resistance and voltage transmission. PVA stranded wire, equipped with two or more threads, is used to transmit low signal voltage and when controlling devices that do not require high power:

• phone chargers;
• doorbells and much more.

An external type PVA copper wire conducts power and voltage from the transformer to the power contact in the room. It includes three stranded cables, one of which is copper and bare, and the other two are equipped with insulation on the voltage line. In order to ensure better safety, the ground wire may have a multi-core sheath , independent of the size of the outer insulation.

Copper conductors, which are present in almost every PVA wire, have the following properties:

• high level of current conduction;
• strength and ductility;
• excellent resistance;
• anti-corrosion coating;
• high coefficient of thermal expansion;
• easy to repair in terms of soldering;
• Compatible with resistors and insulators.

But aluminum ones are more profitable than copper ones due to their following characteristics:

• they hardly heat up during operation, which has a positive effect on the power and speed of electricity flow;
• have oxidation by oxides, which increases their service life;
• the possibility of electrification of hazardous industries;
• flexibility and no need to install special supports over long distances;
• lower cost compared to copper analogues.

PVS cables can withstand loads starting from 10 kV and can last at least ten years if used correctly. Such wires can withstand heat and cold perfectly , but we will return to the technical characteristics later.

It is worth noting that another undoubted advantage of the PVS cable is its sheath, made of fire-resistant material that does not burn even in a strong fire.

Construction and materials

Regardless of the type, this cable includes the following parts:

• current-carrying conductor, which is a round copper wire;
• PVC-based insulation, available in different colors;
• twisting - a set of twisted insulated cores without filler;
• the sheath is made of PVC plastic and is laid so that the gaps between the cores are filled from the inside, so the wire has a round shape.

Areas of application

Copper cables of this series are widely used. With their help, you can lay electricity both in a large factory and create a wiring layout in a small apartment, you can update the transformer wires, install a power plant and much more.

But cables equipped with aluminum threads have a narrower scope of use. With their help, current transmission is ensured in city lighting circuits. Thus, they are suitable for wiring in apartment buildings and industrial production, where there is a need for high current power.

But it is worth noting that, despite the fact that wiring in modern houses is mainly carried out on the basis of aluminum threads, copper is better suited for this purpose. And, due to aluminum wiring, short circuits, surges and oxidation of conductors often occur.

In addition, PVS cables are used for electrification of the following devices:

• household electrical appliances (refrigerator, vacuum cleaner, air conditioner, washing machine, etc.);
• gardening and gardening equipment;
• small-scale mechanization means;
• creation of extension cords.

In addition, PVS cable is used for internal wiring in buildings of various types. For this purpose, copper stranded conductors should be tinned in places where sockets or junction boxes are connected.

Key Specifications

The main technical characteristics of the PVS cable look like this:

• the wire can be used at temperatures ranging from forty degrees below zero to forty degrees above zero;
• the conductive copper core of the wire has a heating limit of 70 degrees;
• after keeping the cable in water at a temperature of about 20 degrees for an hour, it should be tested using an alternating voltage of 2 thousand W at a frequency of 50 Hz for 15 minutes;
• it is imperative to perform trouble-free operation for 5 thousand hours;
• the operating time of the wire for stationary electrical appliances is at least 12 thousand hours;
• the length of the PVS type construction cable is at least 50 meters;
• the average service life of a PVA wire is at least six years;
• when using the cable for stationary electrical devices, its service life is approximately ten years;
• PVA wire is resistant to mold;
• The electrical resistance of the cable over a distance of a kilometer is a maximum of 270 Ohms.

Average cost of a product in Russia and the CIS

The cost of PVS wire depends on its manufacturer, as well as the place of sale. So, if we take the wholesale cost of cable per meter, provided that it is purchased for at least 50 meters, then it will vary from 10 to 12 rubles per meter (for example, cities such as Yekaterinburg, St. Petersburg, Kiev, Kharkov, Minsk and other). Naturally, the final cost can be found at the points of sale of electrical equipment in your city.

It is advisable to choose a power-type PVA wire along with a plug if you plan to use it for home appliances. Before purchasing a product, be sure to ask the seller for a quality certificate and compare the specified values ​​of the device with compliance with these parameters, making a preliminary calculation of them. This will ensure maximum safety of the room where the cables will be installed.