Power copper cables

A power cable refers to a large group of cables with different structural and electrical characteristics. Power cables are necessary to transmit electricity (3-phase current) from the source to the end consumer. The choice of the type of power cable depends on the object to be connected and the conditions for installing the power cable.

For convenience, power cables can be classified according to a number of characteristics:

By voltage:

  • low voltage power cables: 0.66kV, 1kV, 3kV, 6kV, 10kV, 20kV, 35kV;
  • power cables for high voltage: 110kV, 220kV, 330kV, 380kV, 500kV, 750kV and above.

According to insulation material:

  • plastic;
  • polyethylene;
  • rubber;
  • paper.

According to the material and shape of current-carrying cores:

  • aluminum;
  • copper;
  • round, sector or segmented core shape.

PVC INSULATED COPPER POWER CABLES

Power cables with PVC insulation are a common type of cable both in industry and in everyday life. PVC or polyvinyl chloride is a solid polymer with low electrical insulating properties, but with good resistance to acids, alkalis, salts, and moisture. The long-term operating temperature of power cables with PVC insulation can be +80-90C. At higher temperatures, PVC begins to melt, releasing dangerous hydrogen chloride. PVC also deteriorates its properties in sunlight. To reduce the negative properties of PVC, special additives are added to it, making it non-flammable, non-toxic and more resistant to aggressive influences.

The most popular brands of power cables with PVC insulation (we will list copper ones):

  • NYY (ВВГ, ВВГнг (A)-LS) (flame retardant cable);
  • NYM (foreign analogue of the domestic ВВГз);
  • NYCY (ВВГЭ) (with a screen for protection against interference).

POWER FLEXIBLE COPPER CABLES

Flexible power cable is used for non-stationary installation and in other non-standard cases. Using flexible power cables, mobile machines, mechanisms and equipment are connected to all types of electrical networks and mobile power sources with an alternating voltage of 660V (frequency 400Hz) or a constant voltage of 1000 V.

Flexible power cable is divided according to the following parameters.

  1. According to the degree of flexibility, they can be flexible, increased flexibility and especially flexible.
  2. According to the material of the shell and insulation, they can be rubber, flame retardant rubber and thermoplastic elastomer.
  3. According to the rated voltage, 0.22, 0.38, 0.44, 0.66, 1.14, 3, 6, 10kV and these are indicators of alternating current in the frequency range 50 - 500Hz.
  4. According to the nominal cross-section of the conductor.

The tropical version of the cable is marked "KG-T", the cold-resistant version is marked "KG-HL". Flexible power cable KGN is used if its sheath is exposed to aggressive environments, as well as lubricating oils, during operation.

Power cables enclosed in rubber insulation have a number of advantages over cables insulated from other materials. They have a high degree of flexibility and tolerate moisture and vibration loads well. Today, there are mainly two types of similar products on the cable products market:

  • power flexible cable in rubber insulation;
  • cables for laying fixed lines.

SOLAR CABLES/PHOTOVOLTAIC SYSTEMS CABLES

Today, not a single power plant that converts the energy of sunlight into electricity can do without a set of solar cables that combine into one whole all the equipment necessary to solve this problem.

The solar wires used to connect the components of a photovoltaic system come in different types. It typically connects four components: solar panel, inverter, charge controller, and batteries.

Choosing the right type of wire in a photovoltaic system is critical to its operation and efficiency. Using the wrong solar wire may not provide the required voltage and may result in the electrical units not being able to supply power or may result in the battery not being fully charged.

The solar panel cable must satisfy the following conditions:

  • have a cross-section sufficient to ensure minimal losses in power and voltage when the current supplied by a set of solar panels passes through it. The amount of current is determined by the number of panels and the way they are connected;
  • be resistant to atmospheric conditions - UV radiation, precipitation, temperature changes;
  • it is desirable to have a service life comparable to the resource of the equipment used.