Galaxy is a leading low smoke zero halogen (LSZH) cable supplier offering custom and stock LSZH cable and LSZH wire. LSZH cables are often used where safety, along with performance and reliability, are critical. They are typically specified for use in highly populated, enclosed public spaces where flame resistance, low smoke production and reduced toxic/corrosive gas emissions during combustion are critical.
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LSZH cable/wire refers to cables where the cable jacketing and insulation is made with materials that produce low/limited smoke and non-toxic halogens when exposed to fire or high temperatures. There is also low smoke cable and zero halogen cable / halogen free cable.
Low smoke zero halogen cables are used when fire safety is critical, especially in enclosed spaces. A number of fires in transportation facilities and other locations led to the development of LSZH cables. In these emergency fire situations, the low smoke factor helps maintain visibility and can reduce respiratory damage, while zero halogen material cuts the production of toxic, halogenated gases.
Halogen free cable/wire, also called zero halogen cable, refers to cables where the cable jacketing and insulation is made with materials that produce no toxic halogens when exposed to fire or high temperatures. These halogen free cables are used when smoke considerations are minimal. Halogen-free cables also do not use materials that may have an environmental impact.
Low smoke cable/wire, also called limited smoke cable, refers to cables where the cable jacketing and insulation is made with materials that produce no or only small amounts of smoke when exposed to fire or high temperatures. These low smoke cables are used when halogen considerations are minimal.
Because of their low smoke and toxicity benefits, LSZH cables are often chosen for a multitude of applications. These include:
LSZH insulation and jacketing can be used to manufacture nearly any type of cable, including but not limited to:
In some locations, there are regulations that require the use of low smoke zero halogen wire/cable. Local codes should be checked to see if LSZH wires are required.
Galaxy has successfully transitioned a large number of cable projects from unapproved cable specifications to cables that now meet stringent low smoke zero halogen requirements. This expertise and experience is a strong reason to choose Galaxy for LSZH cable.
Also, there are various combinations of cable compounds with different characteristics. There are some low-smoke compounds that are not halogen free, and some halogen free compounds that are not considered low smoke. Galaxy&#;s Sales Engineers can provide guidance in selecting a cable solution that is well suited for specific applications and understand the challenges that come along with the cable selection process. No matter the environment or desired functionality of the cable, a LSZH cable can be manufactured that allows equipment to function as intended when fire and smoke safety is critical.
Galaxy offers LSZH, halogen free, and low smoke insulation and jacket material for cable with:
LSZH cable and wire from Galaxy is available with the following materials:
Galaxy offers LSZH cable in the following ranges of technical specifications:
LSZH cable is low smoke halogen free cable. low smoke emission, namely, reduces the production of harmful objects during combustion. Halogen is a toxic gas for humans. Halogen free means no toxic gases are released in the event of a fire.
The LSZH cable can be referred to as environmental protection cable. It is suitable for the rated voltage of 450/750V and below with requirements of high safety and environmental protection of the place.. For example, are suitable for tall buildings, seasons, metros, airports, hospitals, great libraries, gyms, schools, shopping malls and other crowded places.
All or part of the sheath of the LSZH cable, the cover, outer shell and auxiliary materials (lining and padding) are composed of flame retardant material of polyethylene, so it has excellent flame retardant characteristics.
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When an ordinary cable burns, releases large amounts of smoke and halogenated acid gases. Halogen acid gas will cause corrosion damage to surrounding electrical equipment. It will also have an adverse effect on rescuers and will not be conducive to rescue work in the event of a fire., which in turn will lead to more serious secondary damage.
Nevertheless, low-smoke zero-halogen cables are manufactured from flame-retardant halogen-free polyethylene material for all or part of the outer jacket and supplemental material. This makes it not only more fire retardant, but also free from halogenated acid gases when burning.
If we want to know where low smoke zero halogen cables should be used, we must know its types and characteristics.
The tensile strength of LSZH flame retardant cables is higher than that of PVC wires and cables usually. In the case of PVC cables, the tensile strength is 1,05 kGF/mm2. While, the tensile strength of low smoke halogen-free cables is greater than 1,2 kGF/mm2.
The LSZH cable has good climatic adaptability, can withstand temperatures from -30°C to 105°C. Besides, It has excellent flexibility due to its hardness. 80 a 90. LSZH cables have high volume resistivity. Y at ω/cm3 is for PVC cables and over ω/cm3 is for Low Smoke Halogen Free cables.
LSZH cables have good resistance to high cable tension. They can withstand voltages greater than 15kV. They also have good elasticity and adhesiveness.
Low smoke zero halogen cables are becoming more popular in military applications, aircraft, railway and maritime. This is because in these areas it is often difficult to ventilate in the event of a fire..
Besides, Low smoke halogen free material is also widely used in high pressure underground tunnels or track marking lines in railway system. when using them, reduces the possibility of harmful gases accumulating in the event of a fire. In case of fire, LSZH cable jacket helps protect personnel from flames, smoke and noxious gases emitted.
Use of LSZH CableLow smoke halogen free cables do not release halogenated acid gases. Nevertheless, ordinary cables contain halogens in their insulating sheath. When a fire breaks out, large amounts of halogenated acid gas. This gas is very corrosive and can increase the spread of a fire..
When the LSZH cable burns, the smoke produced is very small. Instead, ordinary cables emit a lot of smoke during combustion. This hampers the work of the personnel involved and pollutes the environment.. Compared to normal insulated cables, low smoke halogen free cables emit only a very small amount of smoke. The amount of smoke emitted should also be recognized as a low smoke level.
To further improve the electrical performance and mechanical power of the cable and ensure better power transmission quality, the bending radius of LSZH cable is larger than that of ordinary cable during laying construction.
1.Free of halogens: Low Smoke Zero Halogen cables are made with environmentally friendly insulation, coating and special materials. This means that it not only has good electrical and physical-mechanical properties, but also avoid secondary pollution by toxic combustion gases.
2.Low smoke emission and low toxicity: This type of cable uses special new sheathing materials. So, no toxic gases are produced during its production and use and it does not pollute the environment. The use of low-smoke, zero-halogen cables is essential in areas with special needs and where there is a high concentration of people.
3.Environmentally friendly: LSZH cable insulation and sheath do not contain heavy metals harmful to human, like lead and cadmium. And the cable is disposed of without contaminating the soil or water. It is more environmentally friendly than conventional cables. So, also known as green cable.
4.High flame retardancy: Green cables can meet the high fire requirements of buildings. The LSZH wires and cables are not easily combustible and prevent the spread of fire and the spread of disasters.. Especially in high-rise buildings, the use of LSZH cables can increase the rescue time and reduce the danger of harmful gases to people.
The disadvantages of Low Smoke Zero Halogen cable are mainly price and popularity of use.. Although LSZH cables are environmentally friendly, its raw material and technical costs are more expensive than conventional PVC cables. Besides, due to excellent electrical conductivity, the mechanical properties and some other special properties of the ordinary wires, LSZH cables cannot completely replace ordinary cables. Nevertheless, as environmental requirements increase and technology advances, LSZH cables will develop strongly.
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