What is Teflon cable? Aug 08, 2023

What is Teflon cable?


Teflon cable, also known as high temperature cable, refers to the use of fluorine plastic insulation materials (FEP, PFA, PTFE) cables.


Excellent corrosion resistance, almost insoluble in any organic solvent, oil resistance, strong acid resistance, strong alkali resistance, strong oxidant and so on. Excellent electrical insulation performance, high voltage resistance, low high-frequency loss, non-moisture absorption, large insulation resistance; Excellent fire resistance, aging resistance, long service life.


1, rated temperature: -65℃ ~ +250℃ (maximum ambient temperature: 250℃ minimum ambient temperature: -65℃)

2, Rated voltage: 600V

3, conductor: single or multiple strands of tinned copper wire, silver copper wire

4, color: red, yellow, blue, white, black, green, brown, orange, gray, transparent, etc

5, unique advantages: polyperfluoroethylene propylene (FEP), fusible tetrafluoroethylene (PFA)

6, structure: Teflon wire core + Teflon sheath

7, performance: excellent corrosion resistance, almost insoluble in any organic solvent, oil resistance, strong acid, alkali, strong oxidant and so on; Excellent electrical insulation performance, high voltage resistance, low high-frequency loss, no moisture absorption, large insulation resistance; With excellent non-combustible, non-aging performance, oxygen index ≥90, long service life; Test voltage 3000V, spark test 7000V without breakdown.


Teflon cable 




Widely used in metallurgy, petroleum, chemical and power plants and other industrial and mining enterprises, in high temperature conditions and harsh environment as a variety of electrical appliances, instrumentation and automation device connection wire.


How do we choose high temperature Teflon wire?

The long-term allowable current carrying capacity of Teflon wire and cable refers to the current value when the cable conductor temperature reaches the long-term allowable operating temperature after reaching thermal stability. The size of the current depends on the maximum allowable working temperature of the product, and the live working system (such as long-term continuous load, variable load, discontinuous load operation), as well as the laying of wire and cable, environmental conditions, etc. It matters a lot. Amperage usually refers to the allowable operating current under continuous load operation for a long period of time, and is converted accordingly in other cases.


Wires and cables for power and lighting lines, wires required for some special occasions, such as high-voltage ignition lines for vehicles, compensation lines for instrument measurement systems, have no requirements for carrying capacity.


It is correct that the cable manufacturer only provides the cable cross section data, not the rated current data of the cable. Since the rated current of the cable is related to the environment, the working time of the load, the allowable working temperature of the cable insulation material, the allowable voltage drop of the cable and other parameters, the purchaser's electrical designer should make comprehensive consideration and select the appropriate cable section.


The economic part of the cable is still misunderstood. Some designers and owners believe that in the case of temperature rise does not exceed the standard, the minimum cross-section of the cable is the economic cross-section. This is a wrong view, because he ignores the economic losses caused by the energy consumption of the cable itself. Under the same load, the larger the cable cross section, that is, the smaller the current density of the cable, the lower the energy consumption of the cable.


The temperature rise of the cable is related to the current density. The higher the current density, the higher the temperature rise. The life of the insulating material is related to the working temperature of the insulating material. The higher the operating temperature of the insulation material, the shorter its life.


The economic cross-section of a cable is a comprehensive parameter that relates to the initial investment cost of the cable and the service life of the cable.

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