The concept of green is deeply rooted in people’s hearts, whether from food or daily necessities. More and more people are choosing to use environmentally friendly products. In many places, the cable project will be used in LSZH cable such as fire, monitoring, and alarm. Usually, people will call it environmentally cable does not refer to the low smoke halogen-free cable. The following is a detailed analysis of the difference between ecologically and low-smoke halogen-free cable. We will look at next.
1.what is lszh cable？
Low smoke zero halogen cable is WDZ-YJV, Low smoke zero halogen cable as the name implies: low smoke, that is, to reduce the production of harmful objects in the combustion, halogen-free, as we all know, halogen for the human body is a toxic gas. Halogen-free is no more poisonous gas release. Usually, this situation refers to the cable in the event of a fire.low smoke zero halogen cables can also be called environmental cables. LSZH cables are mostly used in hospitals and places where environmental health requirements are more stringent.
2.what does LSZH cable mean?
a. Halogen-free: the use of green insulation, sheathing, and unique oxygen barrier materials, not only has good electrical properties, physical and mechanical properties, and to ensure that the product does not contain halogen, the formation of its combustion “secondary pollution”, to avoid the traditional PVC wire burning carcinogenic “Dioxin” substances.
b. High flame retardancy: environmentally friendly cable to ensure that its high fire requirements of the building requirements, the cable is not easy to burn in case of fire, and can prevent the spread of flame and expand the disaster after burning.
c. Low toxicity: insulation and sheath do not contain lead, cadmium, and other heavy metals harmful to humans, in the cable use and waste disposal will not pollute the soil, water. And after short toxicity experiments, white rats under the specified experimental conditions unharmed.
d. No corrosive gas: Using new unique covering materials that are non-polluting to the environment, the production, use process, and combustion will not produce HCL and other gases, the emission of acid gas is minimal, the damage to personnel and equipment, instruments is small, more environmentally friendly features.
e. Waterproof and UV-proof: Green environmental protection materials with a special molecular structure are used to ensure an ultra-low water absorption rate. A special ultraviolet absorber makes the product have a good anti-UV function. Ensure the safety of such products, extending the service life. The first to launch the name “environmentally cable” is a Japanese company, which developed product standards that FN ecological cable standards. Western countries in the United Kingdom also developed advanced environmental cable standards requirements and later gradually spread to the world.
6. High transmittance: the smoke generated by the burning cable is skinny, which is conducive to the evacuation of personnel and firefighting work. Product light transmission rate of more than 40%, much higher than the traditional flame retardant cable.
3.Difference between PVC and LSZHcable
There is a big difference between zero halogen cable and pvc cable both in function and in the scope of use and price. We need to know more about the difference between them for better service. Here we will introduce some considerations in choosing the cable.
LSHF cable and PVC cable are a big difference whether it contains halogen, generally speaking. PVC cable flame retardant effect will be better because it is made of halogen-containing polyethene material, but if burning it will produce toxic gas and smoke, but also corrosive machinery, but also endanger the human body, if the need for rescue, staff must wear anti-toxic masks can be.
Low halogen cable is not to produce any toxic gas, there is no smoke, the machine, and the human body has a perfect protection role. So in some places with high population density will generally choose this kind of LSZH cable equipment.
The actual use of low smoke zero halogen wire has very professional features. Its production and design are very scientific and technical to adapt to the sound characteristics of the environment. In high temperatures and any situation, its excellent safety type standards will not release toxins and other problems, and life use can be more secure and convenient.
Choose LSZH wire to improve the environment’s safety quality, is in a very lot of buildings are also incredibly commonly used to the type. To ensure the choice of the real product, but also pay attention to the brand guarantee, achieve the effect of safe use to meet the actual needs, and focus on the method of the necessary conditions.
4. Advantage and disadvantage of LSZH Cable
Advantages of low smoke zero halogen cable
a, halogen-free: the use of green insulation, sheathing, and individual oxygen barrier materials, not only has good electrical properties, physical and mechanical properties, and to ensure that the product does not contain halogen, to solve the burning of the formation of its “secondary pollution,” to avoid the traditional PVC wire burning toxic substances.
b, low smoke and low toxicity: the use of new unique covering materials that do not pollute the environment, the production and combustion processes do not produce toxic gases, the emission of acid gas is minimal, reducing the harm to personnel and equipment. It is necessary to use low smoke halogen-free cable.
c, high flame retardancy: environmentally friendly cable to ensure that its high fire requirements of the building requirements, the cable is not easy to burn in case of fire, and can stop the spread of flame and disaster after burning. In particular, the modern construction of super high-rise buildings and current material products, when the fire increased the rescue’s difficulty. Using a low smoke halogen-free cable can increase the rescue time and reduce the harm of harmful gases to humans.
Disadvantage of low smoke zero halogen cable
Although LSZH wires are friendly to the environment, their raw materials and technology costs are more expensive than PVC cables. PVC cables have excellent electrical conductivity, mechanical properties, and some other excellent properties. Low-smoke halogen-free cables can not yet wholly replace PVC cables, and therefore are not too widely used in terms of popularity
5.LSZH Cable Application
The zero halogen cable is a product that does not contain PVC and TPU, so it does not produce either harmful gases when burning or hydrochloric acid when in contact with water.
Low smoke and halogen-free sheath materials are classified as LSZH, LSOH, LS0H, LSFH, and OHLS, which are environmentally friendly cables that do not emit toxic fumes when burning. Low smoke and halogen-free materials can reduce the toxic and corrosive gases produced during their combustion.
a, Low smoke and halogen-free materials are often used in poorly ventilated environments such as aeroplanes, train cars, or ships.
b, In the railroad industry, low smoke and halogen-free materials are also commonly used because there are high-voltage lines underneath the railroad or signal lines that transmit the train’s location. The use of low smoke and halogen-free materials also reduces the toxic gas accumulated when the line is damaged by fire or short circuit.
c, In the railroad industry or shipbuilding industry, one of the essential requirements is to protect personnel and equipment from exposure to toxic and corrosive gases, and the use of low smoke and halogen-free materials is required for the outer layer of wires and cables in these applications.
As we can see, although LSZH cables have been around for decades, their use is only just beginning to accelerate. There is no coalition or organization actively promoting LSZH cable, and there are no scenarios where LSZH cable should be used or even how LSZH cable manufacturers should describe it on their websites or in their specifications. Fortunately, this situation is improving, thanks to UL‘s decision to add LSZH and LSF to its certification testing program. Let’s hope this momentum continues, rather than waiting for another serious fire to occur before taking action.
In the meantime, designers and electrical engineers can either choose off-the-shelf LSZH cables or specify the standards that LSZH cables must meet for custom applications as needed.