what is LSOH/LSZH/LSF cable?
Do you know what categories, models and flame retardant grades of low smoke halogen-free flame retardant cables , LSOH cable/LSZH/LSF cable are available? Low smoke halogen-free manufacturer TST CABLES will share with you a detailed cable knowledge popularization.
At present, the cable industry is accustomed to referring to flame retardant cable (Fire Retardant cable), halogen-free low smoke cables (Low Smoke Halogen Free cable, LSOH cable) or low halogen low smoke cables (LowSmokeFume cable, LSF cable), fire-resistant cables (FireResistant) and other cables with certain fire resistance as fireproof cables.
Low smoke halogen-free flame retardant wires and cables produce very little smoke when burning, and contain no halogen or very little halogen, which can greatly reduce the harm to instruments, equipment and human body during fire. Therefore, they are widely used in crowded public places, such as high-rise buildings, large libraries, gymnasiums, explosion-proof command and toll buildings, stations, civil airports, passenger waiting rooms, key cultural relics protection units, subways, underground shops, etc.
Flame-retardant cable Classification of fireproof cables
(1) Flame retardant cable is characterized by delaying the spread of flames along the cable so that the fire does not expand. Due to its low cost, it is a cable variety widely used in fireproof cables. Whether it is a single cable or a bundled cable, the spread of flames can be controlled within a certain range when the cable is burned, so major disasters caused by cable fire and spread can be avoided, thereby improving the fire protection level of the cable line.
(2) Halogen-free low-smoke flame-retardant cable (LSOH cable)
The characteristics of halogen-free low-smoke cable are not only excellent flame retardant properties, but also the materials that constitute low-smoke halogen-free cable do not contain halogen, low corrosiveness and toxicity during combustion, and produce very little smoke, thereby reducing damage to the human body, instruments and equipment, and facilitating timely rescue in the event of a fire. Although halogen-free low-smoke flame-retardant cable has excellent flame retardancy, corrosion resistance and low smoke concentration, its mechanical and electrical properties are slightly worse than those of ordinary cables.
(3) Low halogen and low smoke flame retardant cable (LSF cable)
The hydrogen chloride emission and smoke concentration index of low halogen and low smoke flame retardant cable are between those of flame retardant cable and halogen-free low smoke flame retardant cable. The materials of low halogen (LowHalogen) cable also contain halogen, but the content is lower.
The characteristics of this cable are that it not only has flame retardant properties, but also releases less smoke and low hydrogen chloride when burning. This low halogen and low smoke flame retardant cable is generally made of polyvinyl chloride (PVC) as the base material, and is then processed with high-efficiency flame retardant, HCL absorber and smoke suppressant. Therefore, this flame retardant material significantly improves the combustion performance of ordinary flame retardant polyvinyl chloride materials.
(4) Fire-resistant cable (Fire Resistant wire) Fire-resistant cable can maintain normal operation for a certain period of time under flame combustion conditions and can maintain the integrity of the circuit (Circuit Intergrity). Fire-resistant flame-retardant cables produce less acidic gas smoke when burning, and their fire-resistant and flame-retardant properties are greatly improved. Especially when burning, accompanied by water spray and mechanical shock vibration, the cable can still keep the line running intact.
Some low-smoke halogen-free flame-retardant cable models
Low smoke zero halogen flame-retardant cables (Low Smoke Zero Halogen, LSZH or LSOH) have a variety of models in the international market. These cables are designed to reduce toxic smoke and halogenated gases produced during fires. The following are common low-smoke halogen-free flame-retardant cable models in the world:
TST CABLE Common Customized Low Smoke Zero Halogen Flame-retardant Cable Models
WDZ-BY, WDZN-BY (Chinese Standard): Low-smoke halogen-free flame-retardant fire-resistant wires and cables.
WDZ-BYJ (Chinese Standard): Suitable for flame-retardant polyethylene wires, suitable for wiring in buildings.
WDZ-KYJY (Chinese Standard): Suitable for flame-retardant polyethylene control wires, used for industrial control circuits.
WDZ-YJFY (Chinese standard): Applicable to irradiated cross-linked polyethylene cables with flame retardant properties, suitable for high-voltage power transmission.
WDZN-BYR (Chinese standard): Applicable to flame-retardant polyvinyl chloride soft wires, suitable for mobile devices.
WD-MYJY33 (Chinese standard): Applicable to high-voltage low-smoke halogen-free cables, used in special environments such as mines.
WDZB-YJY (international general): Applicable to flame-retardant and fire-resistant cross-linked power cables, widely used in construction, industry and other fields.
WDZB-YJ(F)E (international general): Applicable to flame-retardant and fire-resistant cables for power transmission.
WLZR-YWY (international general): Applicable to low-smoke halogen-free flame-retardant cables for industrial control circuits.
WLZR-YJWY (international general): Applicable to low-smoke halogen-free flame-retardant cables for power transmission.
WLZR-YY22 (international general): Applicable to low-smoke halogen-free flame-retardant cables for underground burial.
WDZN-YJV22, WDZ-YJY22 (international general): low smoke halogen-free flame retardant fire resistant cross-linked power cable.
WDZB-YJ(F)E22 (international general): suitable for flame retardant and fire resistant cables for power transmission with armor protection.
WDZB-YJY22 (international general): suitable for flame retardant and fire resistant cables for power transmission with armor protection.
WDZBN-YJY22 (international general): suitable for flame retardant and fire resistant cables for power transmission with armor protection.
WDZN-KYJY (international general): suitable for low smoke halogen-free flame retardant and fire resistant control cables.
WDZ-KYJY22 (international general): suitable for low smoke halogen-free flame retardant and fire resistant control cables with armor protection.
WDZN-KYJYP2 (international general): suitable for low smoke halogen-free flame retardant and fire resistant control cables with shielding layer.
WDZN-KYJYP23 (international general): suitable for low smoke halogen-free flame retardant and fire resistant control cables with shielding and armor protection.
WDZ-YJV (international general): suitable for low smoke halogen-free flame retardant cross-linked power cables.
WDZN-YJV (international general): suitable for low smoke halogen-free flame retardant and fire resistant cross-linked power cables.
WDZN-YJV22 (international general): suitable for low smoke halogen-free flame retardant and fire resistant cross-linked power cables with armor protection.
WDZ-YJY22 (international general): suitable for low smoke halogen-free flame retardant and fire resistant cross-linked power cables with armor protection.
International standards for low smoke halogen-free flame retardant cables
Low smoke halogen-free flame retardant cables need to comply with a series of international standards, including but not limited to:
·IEC 60332-3: Flame propagation test for bundled wires and cables.
·IEC 61034: Determination of smoke density generated when cables burn.
·EN 50575: Classification of cable performance in fire.
Selection basis of low-smoke halogen-free flame-retardant cable
When selecting low-smoke halogen-free flame-retardant cable, the following aspects should be considered:
· Application environment: Select the appropriate model according to the specific environment where the cable will be installed.
· Temperature range: Confirm whether the operating temperature range of the cable meets the actual needs.
· Flame retardant grade: Select the corresponding flame retardant grade according to the safety requirements of the application.
· Mechanical strength: If the cable needs to withstand mechanical stress, a cable with corresponding mechanical strength should be selected.
Low-smoke halogen-free flame-retardant cable is particularly widely used in crowded places such as public places, hospitals, schools, subways, etc., because it can reduce the generation of toxic smoke in fires and improve the safety of personnel escape. Choosing a suitable low-smoke halogen-free flame-retardant cable can greatly improve the safety of electrical systems.
Cooperate with TST CABLES to customize high-quality LSOH/LSZH/LSF cables
In modern buildings and industrial facilities, safety is always the primary goal. Low smoke halogen-free flame retardant cables have become the first choice for many high-end projects with their excellent safety performance. Using advanced low smoke halogen-free materials, our cables can significantly reduce the generation of toxic smoke when a fire occurs, and maximize the protection of personnel’s lives. Not only that, these cables also have excellent flame retardant properties, which can effectively delay the spread of fire and win precious time for emergency evacuation. Whether it is a high-rise building, subway station or hospital school, choosing low smoke halogen-free flame retardant cables is choosing a peace of mind and reliability. We are well aware of the importance of every detail. From material selection to production process, every step strictly follows international standards to ensure that every cable can play a key role at a critical moment.
If you have customized low smoke halogen-free cables,LSOH cable, flame retardant cables, coaxial cables, UL cables, Teflon wires, armored wires, industrial cables, power cables, control cables and other products, and need further technical support or cable solutions, you can always send an email to the professional cable engineer of TST cable manufacturer (email: lixiangchao@testeck.com, please state your country, your industry, and your needs in the email, and we can also provide you with free samples)
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