Wire and cable company introduces how to distinguish the continuous high temperature wire and cable true or false

Release time: 2022-11-25 10:47

【Summary Description 】 Wire and cable company: high temperature cable as their name has the same heat resistance, the characteristics are usually formed by the production and processing of special raw materials, but also made high temperature cable is more expensive than other cable, although more expensive, but the role can not be measured with money. Continuous high temperature wire and cable are ubiquitous in our daily life and widely used. It also brings great convenience to our daily life. Moreover, continuous high temperature wire and cable have many advantages compared with general cables.

Wire and cable company introduces how to distinguish the continuous high temperature wire and cable true or false

Wire and cable company: high temperature cable as their name has the same heat resistance, the characteristics are usually formed by the production and processing of special raw materials, but also made high temperature cable is more expensive than other cable, although more expensive, but the role can not be measured with money. Continuous high temperature wire and cable are ubiquitous in our daily life and widely used. It also brings great convenience to our daily life. Moreover, continuous high temperature wire and cable have many advantages compared with general cables.

Wire and cable company: How to distinguish the continuous high temperature wire and cable true or false

1, the electrical conductor resistance measurement exceeds the standard, wire and cable copper wire should be applied to high purity electrolytic nickel, this raw material pulled out of the wire symmetry and gloss. Some application of recycling copper manufacturing enterprises get strong profits, or reduce the copper area with shoddy, resulting in a serious conductor resistance beyond the standard.

2. Insulating layer and protective sleeve raw materials should be suitable for physical properties (tensile strength, tensile strength) index values are not up to standard. The raw materials of insulating layer and protective sheath of part of wire and cable should be recycled plastics, whose tensile strength and tensile strength cannot meet the requirements of application. Cable is very easy to crack the structural mechanics process and the current conductor bare, will lead to short circuit fault and charge and discharge.

3. The new project of high pressure cable insulation layer thermal widening fails to pass the test. The thermal widening of insulation layer of some new products has the condition of breaking, which is easy to lead to short circuit fault accident under high temperature.

What causes cable senescence?

1. Damage caused by external force. From the analysis of operation in recent years, especially in large cities with rapid economic development, a large number of cable failures are caused by mechanical damage.

2. Insulation layer return tide, such a thing is very common, generally appear in the directly buried or tube groove cable interface. For example, if the cable RF connector is not made well, the RF connector will soak or penetrate into the water steam under the wet natural conditions, and the r will generate water branches under the action of the electrostatic field for a long time, which will harm the insulation strength of the cable and cause failure.

3 corrosion, cable immediately buried in the area of strong acid and alkali action, cable armored cable, tin drop and outer protective layer is etched, protective layer long-term corrosion and electrolytic corrosion, protective layer failure, insulation layer reduction, cable common faults are also produced. Organic chemistry: Enterprise cable erosion is quite severe.

4. Long-term load operation, overload work, because of the thermal effect of current, load current according to the cable is bound to cause electrical conductor heating, at the same time, positive charge skin collection performance and armor vortex damage, damage to the dielectric insulation will also bring additional heat at first glance, cable temperature will increase.

5. Wire and cable company: cable connector common failure, cable connector is the cable route in the insufficient stage, the staff immediately fault (poor construction) caused by the cable connector common failure often occur. When the construction team is designing the cable connector, if the connector is not well connected, the heating is not complete and other factors, the insulation layer of the cable connector will fall, resulting in safety accidents.

6. Environment and ambient temperature, environmental factors and pyrogen of the cable will also cause the cable temperature to be too high, insulation layer destruction, explosion and fire.