Today, a wide range of different conductive systems is presented to consumers in the electrical equipment market. The MGTF wire is in great demand among masters. A description of its characteristics is contained in this article.
Acquaintance
MGTF wire is a heat-resistant mounting conductive product. The function of the conductor is performed by a copper core. Fluorine-containing polymers are used as an insulating coating. In the manufacture of such a plastic is also called ftoroplast. Due to its characteristics, the MGTF wire has been widely used in various fields of the electric power industry.
Almost all electrical installations with a voltage of up to 250 V are equipped with these conductive systems. The color of the fluoroplastic is white and pink. Since no other coating is applied to it, this color has become decisive for MGTF wires.
Abbreviation
Information on the design and technical characteristics of MGTF wire can be obtained from the product labeling.
Since the letter āAā is absent in the abbreviation, it means that the conductive core is not made of aluminum.
The letter "M" indicates that this wire is mounting. The letter "G" indicates a high rate of flexibility of this conductive system. MGTF wire (GOST 22483-2012) is a product of the 5-6 class of flexibility.
The presence of the symbol "T" in the designation indicates that the product has inherent heat-resistant properties. Such a wire can be used at a temperature exceeding 100 degrees. The letter "F" indicates the material of which the insulating coating is made. In this case, it is ftoroplast.
Additional notation
Depending on the insulation coating, some MGTF wires, in addition to standard symbols, may also contain additional ones. For example, if the letter āEā is present in the abbreviation, this means that this wire is equipped with a shielding coating. In its manufacture, tinned copper wire is used. Such a wire is not subject to electromagnetic radiation. Therefore, this conductive system will cost more.
The presence of the letter combination "EF" indicates that the wire contains a protective shield and a fluoroplastic layer. Such a product has improved mechanical characteristics.
The letter combination "MS" indicates that the fluoroplastic layer is additionally sintered. A wire made in this way has high moisture resistant properties.
Numerical designation
In the wire marking , numbers follow the letters. The first of them indicates the number of conductive cores. If the product is equipped with two cores, the number ā2ā is indicated in the marking. The last numerical designation indicates the cross section. Depending on the number of cores, this parameter varies between 0.03 - 2.5 mm square.
Application
MGTF wire has established itself as a high-quality electrical connector in the field of installation. There are two ways to work with these wires: static and mobile. The place for the MGTF may be blocks and devices. This conductive product is equipped with aircraft, shipbuilding and industrial structures. Also, the MGTF wire is used for electrical installation in residential buildings.
Product Device
The conductor is equipped with several smaller wires twisted together. The diameter of the wire depends on which class of flexibility the product belongs to. For example, if a 5th grade wire has a cross section of 0.5 mm square, then each individual wire should not exceed 0.33 mm. If this product belongs to the 6th class, then the diameter may be 0.31 mm.
Depending on what section the wire has, a certain thickness of insulation is provided for it. If the MGTF wire cross section is 0 35 mm square, then the thickness of the insulation coating should be 0.18 mm. With a cross section of 0.05 mm square. insulation thickness is 0.12 mm.
With a nominal wire cross section MGTF 0 2 mm square. its outer diameter will be 1.04 mm. Such a product is equipped with nineteen copper wires with a diameter of 0.12 mm.
For the screen (copper braid), wires of clear standards are not provided. This parameter is determined by each manufacturer in different ways. Mostly the standard thickness of the shielding coating of MGTF wire is 0 12 mm.
The last structural element of the product is a shell made of fluoroplastic. It has the same thickness as the main insulation.
Mechanical properties
The main parameters of the mechanical characteristics include:
- Flexibility. There are two flexibility classes for MGTF: 5 and 6.
- Temperature. This conductive product can be operated at temperatures from - 60 to +220 degrees. If necessary, this indicator may be higher. MGTF can spontaneously ignite at a temperature of 520 degrees. However, the allowable limit for the product is a temperature regime not exceeding 220 degrees. This wire is undesirable to operate at temperatures up to 260 degrees. Otherwise, the product will begin to melt. This process is accompanied by the release of perfluoroisobutylene, tetrafluoroethylene, carbon monoxide and carbon fluoride.
- Immune to acids, alkalis, fats and solvents. In addition, this wire has frost resistance. MGTF can be operated in an aggressive environment.
The service life of the wire is at least twenty years.
Weaknesses
MGTF wires have their drawbacks:
- The product can be used in an environment whose humidity does not exceed 80%. This is due to the high moisture resistance of MGTF.
- The product is not recommended for use in rooms that are characterized by sharp temperature changes. Otherwise, moisture, falling under the protective layer, will reduce its insulating properties.
- MGTF insulation has high fluidity: it stretches under heavy load. The thickness of the protective coating is reduced. The tinned copper wires themselves, which make up the insulating layer, can become untangled. This entails a breakdown of the conductive system.
Electrical properties
MGTF wires are designed for operation at a rated AC voltage of 250V and a frequency of 5 kHz. DC current should be no more than 350V.
The index of internal resistance depends on what section the product has. For example, if the cross-section of the MGTF wire is 0 07 mm square, then its resistance will be 271 Ohm / km. Such a product consists of 14 copper wires, each of which has a diameter of 0.08 mm. For MGTF with a cross section of 0.5 mm square. resistance will be 39 Ohm / km.
Insulation resistance indicator. This parameter is greatly affected by air humidity. For example, for MGTF under normal conditions, the insulation resistance is not less than 100 thousand megohms per 1 meter. If the air temperature exceeds 200 degrees, then the resistance will decrease to 10 thousand megohms. This indicator will decrease even more if, in a room in which there is no condensation, air humidity reaches 98%. In this case, the insulation resistance of MGTF will not exceed 100 megohms per meter.