Each wire and cable can come in different sizes, qualities, sheaths, and materials which give them their unique specifications and due to these specifications, they are categorized into high, medium, and low voltage wires and cables.
introductoin hight voltage wire
A cable that is used to carry electrical energy over a high voltage is referred to as a high-voltage cable.
The cores of high voltage cables are often constructed of steel, and the sheathing is typically made of aluminum.
Aluminum is not suited for use in the production of cables on its own despite the fact that it is ranked as the fourth best conducting metal behind gold, silver, and copper respectively.
Aluminum is overly malleable, and it will stretch excessively when subjected to the weight-related pressure of its own existence.
In order to avoid these complications during the manufacturing process of high voltage cables, a steel core that maintains the cable's original shape is utilized.
High voltage cable specifications
In general, high voltage wire and cable are produced and sold in different models depending on their type of uses, applications, and specifications.
The components and general structure of the communication cable we know are quite different from the types of high, medium, and low voltage cables; but in general, it can be said that the cable consists of two main and important parts, conductors and insulators.
The function and application of the cable is the primary factor that determines its characteristics.
In point of fact, it is the function and application of the cable that determines its shape, gender, cross section, and the number of conductors and insulators, and these distinctions are the basis for the classification of the cable.
The only thing that differentiates one type of high voltage cable from another is the design concept of the cable and the type of cable that is used for a given application.
The method of manufacturing and production of various types of high voltage cables is the same in almost all production facilities around the world.
Organizing the various types of high voltage cables
- A high voltage gas cable of the SF6 kind
- High-pressure oil cable: A- cable for low-pressure oil B- cable for high-pressure oil
features hight voltage wire
When the cable is heated, the surplus oil travels through the cable channel and into an expansion tank that is positioned at the end of the cable.
This form of the high-voltage cable has the cable wrapped and insulated with paper that has been saturated with thin oil.
When oil is added, the air cushion inside this tank catches it and brings the pressure of the oil inside the tank up to a higher level.
The oil will remain in the expansion tank in this manner until the internal pressures in both the cable and the expansion source have been brought to a state of equilibrium in accordance with the physical rules.
After the high voltage cable has cooled down completely, the higher pressure expansion source will finally begin to provide the cable with oil, which will then flow into the cable.
The constant heating and cooling of the compressed cable, which results in a back-and-forth operation, stops the formation of voids inside the cable.
Take note that the resistance of the low oil pressure cable is almost twice or even three times lower than the resistance of the oil cable.
- Cable for high pressure oil transmission
Each wire in this sort of oil-treated cable, which is a type of high-voltage cable that is frequently used, is coated with paper that has been combined with heavy oil.
This coating then prevents oil from escaping while also preventing moisture and air from entering the cable.
Copper tape and plastic tape are used to wrap the coils extremely tightly.
Finally, the air inside the steel pipe is evacuated and diluted with oil to a pressure that is equal to 16 kPa per psi.
cm in order to prevent the cable from being damaged when it is inserted into the steel pipe.
This is done to prevent the cable from being damaged when it is inserted into the steel pipe.
Different varieties of high-voltage SF6 gas wires
- A) Internal pressure aluminum tube cable
- b) Cable that contains an internal pressure and has a steel tube
- c) External pressure cables and steel pipes
- d) A gas cable that has been sealed and is filled with SF6 gas
The type of high voltage cable that is used the most frequently.
armored cable made of copper and aluminum cables with a single strand, with a maximum of five strands, that operate between 0 and 0.6 kV and between 0.6 and 1 kV Straightforward and fortified Copper and aluminum crossover cables operating at 20 and 36 kV Cables for communication on the ground and in the air Compression cable varieties used for networks and coaxial transmissions All varieties of high-voltage cables, including those that are resistant to oil and fire.
High voltage wire specifications
Wire and cable are very similar to each other but in fact, there are some differences as well.
In general, a cable can consist of more than a wire and conductor.
High voltage cable and wire are widely used to transmit electrical energy in installations with nominal voltages higher than 30 kV from power plants to a central network or primary distribution network and are used for burial in the ground or in channels.
