In this article we will discuss how to conduct underground armored cables. In addition, tell you about their labeling and directly about how calculated lines.
Strip armoured cable lines as any construction process can be divided into stages. It's important to consider a clear sequence and the correctness of the implementation plan, and implementation of all installation conditions.
Before you start laying cables, you need to consider the following requirements:
Ditch for cables is an alternative to the high-voltage transmission line. The packing plan is pretty simple, but has quite a long and laborious process.
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Power armored cables for installation in the ground consist of one or more conductors. Conductors can be made of different conductive materials, most often copper and aluminum.
Also, the cables can be made with ground dwelling, usually it has a cross section lower than the main cores. Isolation is necessary to provide the required electric strength between conductors and the armored shell. It is made from various polymeric materials.
Now consider the features of copper armored cable. Armor of this cable is able to protect from the harmful and corrosive environmental conditions. Copper armoured cable for laying in the ground is perfect for laying and installation of conductive tracks with a high probability of damage. The product of this type is carried by two armored strips and covered with a layer of polyvinyl chloride.
How does aluminum armored cable? Conductors of this type are used when large cross-section, it is not subjected to severe bending or stretching, as aluminium is very fragile material. Armoured aluminum cable for laying in the ground is formed by winding ribbons around a galvanized insulation material plastic or PVC.
As for the benefits of armored cables, they are as follows:
Long lifespan and high corrosion resistance guarantee the materials used for the defense of the cable. Depending on the type of styling and features of soil select different types of armor. One of the most famous labels is ABL, AVBBSHV, VBBSHV. Cross-section of these conductors is 1.5 mm2 270 mm2. Such lines can be with different number of cores (1 to 5).
Types of external security:
Brand armored cables for installation in the ground is necessary to choose suitable characteristics, based on the calculation conditions. And the purpose of the marking is necessary to display product features:
For example wire type VBBSHV where:
As you can tell from the title, now you will learn how to carry out the calculation. Armoured cable for laying in the ground is calculated to select the optimal type and section of power wire. First, you must determine the estimated currents according to the formula, which is presented below.
RN - rated power of the consumer, VT.
- the coefficient of demand of the consumer.
UC - nominal voltage of the network.
Cos f - power factor of the consumer.
NC - the coefficient of performance of the network.
Next, carry out the calculation of the mechanical strength of the cable.
After calculating the chosen conductor cross-section greater than or equal to calculated....
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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."
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