WDZB-YJY: This model number represents a low-smoke halogen-free flame retardant class B fire-resistant cable. Among them, “WDZB” represents that the flame retardant grade of the cable is class B, which means that this cable can effectively prevent the spread of flame; “YJY” represents the structure and material characteristics of the cable.
The main materials of WDZB-YJY fire-resistant cable:
Including copper (or aluminum) conductor, cross-linked polyethylene insulation, possible shielding layer (in high-voltage cables), and protective layer of polyolefin and other materials.
Conductor:
MATERIAL: The core of the conductor generally consists of copper or aluminum. Copper conductors are widely used because of their excellent electrical conductivity and mechanical strength.
Structure: The number of conductor cores can be single, double, triple, quadruple, five cores, etc., depending on the specific needs of use.
Insulation layer:
MATERIAL: Cross-linked polyethylene (XLPE) is usually used for the insulation layer. This material has high heat resistance and electrical properties, which can ensure the normal operation of the cable at high temperatures, while preventing electrical breakdown and leakage.
Role: The main role of the insulation layer is to protect the insulation between the conductor, core and the outside world, to ensure that the current is properly conducted along the conductor, while preventing current leakage or interference with the conductor by external factors.
Shielding layer:
For wire and cable of 15KV and above, the conductor shielding layer and insulation shielding layer are usually set. The shielding layer can reduce electromagnetic interference and improve the transmission performance of the cable.
Protective layer:
The protective layer is divided into the inner and outer protective layers, and the main material may be polyolefin and so on.
Role: to protect the cable from the intrusion of external impurities and moisture, to prevent direct damage to the cable from external forces, and to enhance the mechanical strength and durability of the cable.
WDZB-YJY fire-resistant cable product characteristics:
Fire resistance performance: due to the class B flame retardant grade, this cable has a better fire resistance in a fire, and can effectively stop the spread of flames.
Environmental performance: this cable is made of low-smoke halogen-free material, which does not produce a lot of smoke and harmful gases when burning, and is less harmful to the environment and human body.
Electrical performance: the insulating material of the cable is cross-linked polyethylene (YJ), which has high heat-resistant and electrical performance, and can ensure the normal operation of the cable under high temperature, and effectively prevent problems such as electric breakdown and leakage.
Wide range of use: Due to its excellent fireproof and environmental performance, this cable is widely used in the power supply system of high-rise buildings, subways, tunnels, airports and other places.
WDZB-YJY fire-resistant cable model introduction:
In the model number of WDZB-YJY cable, “W” stands for halogen-free, “D” stands for low smoke, “Z” stands for flame-retardant, “B ” stands for flame retardant class B, “YJ” stands for cross-linked polyethylene insulation, and “Y” may stand for polyolefin sheath (as interpreted in some sources). The combination of these letters completely describes the main characteristics and material composition of this cable.
In addition, the cable is available in a variety of voltage ratings, such as 750V, 0.6/1kV, 1.8/3kV, etc., to meet the needs of different application scenarios. Meanwhile, the rated temperature of the cable conductor is 90℃, and the conductor temperature does not exceed 250℃ during short-circuit (maximum duration of 5s), and these characteristics make it maintain stable performance in various harsh environments.
How to choose WDZB-YJY fire-resistant cable?
A number of factors need to be considered comprehensively, including the usage environment, voltage level, load current, mechanical strength requirements and so on. Here are some suggested selection steps for TST CABLES:
Determine the voltage rating:
Select the appropriate voltage rating according to the actual application scenario, such as 0.6/1kV, 1.8/3kV, etc. Ensure that the voltage level of the selected cable can meet the operational requirements of the system.
Conductor cross-section selection:
Select the appropriate conductor cross-section according to the load current and transmission distance. Larger conductor cross-section can carry more current, but the cost will increase accordingly.
Consider mechanical strength:
If the cable will be installed in an environment susceptible to mechanical damage, cable models with steel tape armor, such as WDZB-YJY23, WDZB-YJY33, etc., can be selected to enhance the mechanical strength of the cable.
Flame retardant grade:
Since you have chosen WDZB-YJY cables, it means you want the cables to have certain flame retardant properties. Make sure that the selected model meets the requirements of flame retardant B grade.
Consider the environment of use:
If the cable will be used in special environments such as wet, corrosive or high temperature, you need to choose a cable model with appropriate protective measures.
Other special requirements:
If the cable is required to have low smoke and halogen-free and other environmental characteristics, you should ensure that the selected model meets these requirements.
Based on the above considerations, the following are some possible recommendations for product selection:
For general-purpose low-voltage distribution systems, the appropriate conductor cross-section can be selected based on the amount of current.
If stronger mechanical protection is required, a model with steel tape armor can be selected.
For high-temperature environments or applications requiring higher voltage ratings, cables with higher voltage ratings can be selected, and it is important to ensure that the insulating and sheathing materials are able to withstand the corresponding high temperatures.
Finally, it is recommended to consult with TSTCABLES, a specialized supplier of aviation fire-resistant cables, when selecting cables to ensure that the selected product meets the actual application requirements and safety standards.
