Anyte THHN cable UL/CSA Certification

TW — Indicates a single conductor having flame-retardant, moisture-resistant thermoplastic insulation. The wire is rated 60°C wet or dry.

THHN cable — Indicates a single conductor having flame-retardant and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 90°C dry only.

THW — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation. The wire is rated 75°C wet or dry.

THW-2 — Same as THW except that the wire is rated 90°C wet or dry.

THHW — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation. The wire is rated 90°C dry and 75°C wet.

THWN — Indicates a single conductor having flame-retardant, moisture- and heat-resistant thermoplastic insulation with a jacket of extruded nylon or equivalent material. The wire is rated 75°C wet or dry. THWN wire suitable for exposure to mineral oil and to liquid gasoline and gasoline vapors at ordinary ambient temperature is marked "Gasoline and Oil Resistant I" if suitable for exposure to mineral oil at 60°C, or "Gasoline and Oil Resistant II" if the compound is suitable for exposure to mineral oil at 75°C. Gasoline resistant wire has been tested at 23°C when immersed in gasoline. It is considered inherently resistant to gasoline vapors within the limits of the temperature rating.

THWN-2 — Same as THWN except that the wire is rated 90°C wet or dry.

Anytekabel Co.,Ltd.

www.anytecable.com

+86-519-86922519

+86-519-81099156

anytecable@anytecable.com

Accidents hidden danger of Cable construction is much more in winter

Low medium voltage power cable construction in winter, due to the outdoor temperature are below minus 10 ℃, low temperature of polyvinyl chloride and cross-linked polyethylene insulation and sheath material should suit to present hard brittle features, such as laying accidentally suffers accident knock against, in the process of insulation wire core and copper shield is easily damaged. Even after the cable laying the scene completion test can pass, but later after continuous electricity, cable in the damaged area through the capacitive current eventually, can lead to partial discharge, accelerate the insulation aging, lead to breakdown fault line.

This kind of situation in the low voltage cable performance is not outstanding, performed very well in the medium voltage cable. Sometimes cable factory test without any problems, laying the site due to the limitation of various conditions on cable directly without taking any measures in winter construction, cable laying completed after the scene test everything is normal, but later came a very short time, the power failure, anatomic failure point, appearance without any mechanical damage, but the internal insulation happens serious breakdown and ablation.

Anyte cable

In recent years, some new installation of medium voltage 10kv, 35kv cable fault due to various constraints, not at the scene to cable heating measures, directly around 10 ℃ below zero in winter construction installation on site. The power cable in a short time and white and relatively insulation breakdown fault, by accident, cable production and factory test did not appear abnormal, the scene completion test also smoothly. But electrify malfunction in short time, with no doubt this wire and cable to cable heating measures in winter construction is not relevant.

Introduction of Cable Insulation material

What is the insulation material?
Electrical insulating materials according to their chemical properties of commonly used is different, can be divided into inorganic insulation material and mixed organic insulation materials, insulation materials.Common inorganic insulation material has: mica, asbestos, marble, porcelain, glass, sulfur, etc., mainly used for windings of motors, electrical insulation, switch backplane and insulator, etc.Organic insulating materials are: lac, resin, rubber, cotton, paper, jute, rayon, etc., mostly to cable manufacturing insulating paint, coating insulation of winding wire, etc.Hybrid insulation materials for the above two kinds of material processed into a variety of molding insulation materials, used as the base of the electrical appliances, shell, etc.
The application of insulating material
The role of the insulating material is charged part of the electric cable potential difference in the electrical equipment.Therefore should first insulating material has high insulation resistance and compression strength, and can avoid leakage and breakdown, accident.Second heat resistant performance is better, avoid long-term overheating and aging metamorphism;In addition, still should have good thermal conductivity, tide lightning resistance and high mechanical strength and easy processing, etc.According to the above requirements, the commonly used performance of the insulation dielectric strength, tensile strength, density, coefficient of expansion, etc.

Environmental Friendly LSZH Flame-retardant Cable Material

  We all know that many kinds of harmful gas produced when the wire and cable flaming, such as carbon monoxide, sulfur dioxide, and so on. So the real things hurt the body is the poisonous gases in the fire scenes, among which many of these gases come from household wire and cable. What is the essential difference between Environmental Friendly Halogen-free Cable Material and Ordinary wire & cable material? Compare with ordinary wire & cable material, during the buring, the Environmental Friendly LSZH Flame-retardant Cable Material produce less toxic gas, and produce less smoke, also not easy to be lit.

 
What fields do Environmental protection low smoke zero halogen flame retardant cable material mainly used in?
You know the characteristics of Environmental Friendly LSZH Flame-retardant Cable Materials, obviously the price of the wire and cable of this material must be more expensive than the general material, it is mainly used in some densely populated public places, such as: cinema, and so on. Range can be involved in various types of wire and cable, such as: power cable, telecommunication cable and optical fiber cable, data communication cable, transport system cable, automobile, motorcycle, etc. There are special and strict requirements for wire and cable in these occasions. mong which, the cable insulation sheath material is critical, most of wires and cables we see everyday in some public places are made of low smoke zero halogen flame retardant cable materials.
 

Why is Environmental Friendly low smoke zero halogen flame retardant cable material eco-friendly?
Here we have to introduce a kind of important basic material: polyolefin resin, it is made of inorganic flame retardants fertilizer manufacturing. Due to the basic characteristic of the polyolefin resin and adding a large amount of inorganic flame retardants, gives the cable material flame features such as retardant, low smoke, halogen free, low toxicity and so on. But this kind of wire and cable material is not faultless, the physical and mechanical properties of polyolefin resin, electrical properties, such as performance, now with the improvement of science and technology level, we are improving and perfecting its performance. Changzhou Anytekabel Co.,Ltd., is also in constant research and exploration, believe in the near future we will make the material polyolefin resin much more perfect.

Fire-proof and explosion-proof of Power transformer

Power transformer is the main distribution power system of electric power equipment.Power transformer is mainly is to reduce the high voltage of the grid can be used directly for the 6000 V or 380 voltage, to supply electrical equipment. Such as transformer overload or short circuit inside, insulating material or insulating oil will decompose due to action of high temperature or electric spark, expansion and gasification, the transformer internal pressure has increased dramatically, may cause transformer shell explosion, a large number of insulating oil jet combustion, flow and will further expand the fire danger. In the operation of the fire explosion should pay attention to:
(1) can't overload operation: overload running for a long time, can cause heating coil, make the insulation aging, cause a short-circuit.
(2) often inspection insulation oil: oil should be regularly test, unqualified oil should be replaced in a timely manner, or take other measures.
(3) to prevent the damage of transformer wire and cable core insulation aging, core heat cause insulation aging for a long time.
(4) to prevent because of careless repair damage insulation, if found abrasion damage, will handle in time.
(5) ensure that wire contact is good, poor contact local overheating.
(6) to prevent lightning, transformer will be destroyed due to breakdown of insulation.
(7) short circuit protection: transformer coil short circuit or load, if protection system failure or protection fixed value is too large, could burn down transformer.To install and reliable for this short circuit protection.
(8) to protect good grounding.
(9) ventilation and cooling: if the transformer coil wire is A level of insulation, the insulation is given priority to with paper and cotton yarn.Temperature rise every 8 ℃ half to reduce its insulation life;Transformer normal running temperature below 90 ℃, about 20 years of life;If the temperature to 105 ℃, the life expectancy for 7 years.Transformer operation, to maintain good ventilation and cooling.

Germany daub special fluorescence fluid on cables anti-theft

There is copper exist in cable, wire and cable has become a target for hunting ground in many countries.Telecommunications companies to come up with new ways to do this, Germany, daub on the cable a special fluorescent liquid called "artificial DNA", contains unique code can be used in the lock owner. Deutsche telekom for cable theft losses every year hundreds of thousands of euros.September 30, the company launched a propaganda campaign to show that thief skills: company employee use of remote control helicopters to overhead cable daub the fluorescent liquid, although with the naked eye, coating liquid of cable is not much difference with ordinary cable but under uv light irradiation, daub is special color will be appeared.

Not only that, the liquid unique code as "invisible symbol", visible under a microscope.Through the coding, the true master of the police can find out items.This makes the thief when stealing wire and cable and channeling, must have the courage. Deutsche telekom has begun for the ground cable previously coated with "artificial DNA", is expected to be completed by the end of 2014.The company has not released the security measures. In Germany, railway company enterprise has applied the fluorescent liquid such as security, some people also apply it on the valuables.

Impacts of Mold Structure on Drag Rubber Cable Sheath

With the development of the industrialization, the rubber flexible cable with its stable electric performance, excellent mechanical and physical properties, especially the flexible characteristic, has been the main equipment installation cable in various mobile situations. At present in large open-pit coal mine and metallic ore mining process, there often appears the rubble and sharp objects hit the cable, cable often suffers a lot of drag force in the process of moved along with large mining equipment, so Drag Rubber Cable depends on the special structure design to reduce the effects of external torque to the sheath material, thereby improving the service life of the cable and become the first choice of drag equipment installation.

UTP CAT6

In drag friction occasion, the reduce of cable life often starts from the outer to the inner sheath of wear damage to insulation wire core, so the lifetime of the sheath directly affects the service lifetime of the cable. Drag Rubber Cable adopt make the traditional sheath thickness one divides into two, increase braid structure between the two layers of sheaths to increase the adhesion strength of the inner and outer sheath, braid equipped with a certain elastic force material, to buffer cable sheath reaction in the process of stress, so as to improve the lifetime of the cable.

UL2464 5-24AWG

Once before implementation of sheath can be divided into two times, naturally sheath thickness of each layer is thin, greatly improving process realization difficulty, therefore, the choice of mold for Rubber material during extrusion is especially important. Under normal circumstances, common rubber cable production is implemented through the mold core and mold ratio to provide a larger pressure to fill the cable core, general mold core will choose large Angle, reduce the die sleeve angle, the angle difference of mold core and die set is controled in around 15 ℃, through the Angle difference control extrusion pressure of rubber material, the material compaction under the condition of extrusion in the core surface. The thickness of inner nd outer sheath of drag cabe is thin, production of rubber material is extrusion type, in outer sheath production, rubber material in the core function of extrusion die, when pressure is too large, it is easy to cause mold stucked due to the Accumulation of extrusion of inner sheath.