WDZB1 Flame Retardant Power Cable Product Introduction

WDZB1-rated flame-retardant cable features a flame-retardant performance grade of B1. The cable uses magnesium hydroxide, aluminum hydroxide, and other metallic water substitutes for traditional fillers, releasing crystalline water during combustion to lower the cable's flame temperature and prevent the heat from sustained flame combustion. This structural design not only ensures a low flame spread height but also effectively controls the total smoke production and combustion speed. The B1-rated flame-retardant cable is an energy-saving, environmentally friendly flame-retardant product, primarily suitable for high-density areas with a high flame-retardant performance grade, such as subways, airports, high-rise buildings, large shopping malls, hotels, and transportation hubs, among others.

Product Name and Applicable Voltage

Name: WDZB1 Flame Retardant Cable
Rated Voltage: 0.6/1 kV

Model, Specifications Range

Product Execution Standards

GB31247-2014、GB/T31248-2014、GB/T12706.1-2008、GB/T12706.2-2008、 GB/T12706.3-2008、GB/T 19666-2005

2. Product Introduction

Design considerations for fire safety in engineering construction in our country involve selecting B1 grade flame-retardant cables for densely populated areas and locations requiring special protection. This ensures a more scientific and reasonable approach to fire safety requirements and minimizes potential fire hazards. The use of 81-grade flame-retardant cables is of significant importance for building fire safety.
B1 flame-retardant cable performance grade cables use magnesium hydroxide, aluminum hydroxide, and other metal water substitutes for traditional fillers. This releases crystalline water during combustion, reducing the cable's flame temperature and thereby preventing the heat generated by sustained flame combustion. This structural design not only ensures the height of flame spread, but also effectively controls the total smoke production and combustion speed to very low levels. B1 flame-retardant cable performance grade cables are an energy-saving, flame-retardant, and environmentally friendly product, primarily suitable for locations with relatively dense populations and higher flame-retardant performance requirements, such as: subways, airports, high-rise buildings, large shopping malls, hotels, transportation hubs, and similar venues.

Model Descriptions and Product Examples

3. Usage Features

3.1 Rated voltages: 750V, 0.6/1kV, 1.8/3kV, 3.6/6kV, 6/6kV, 6/10kV, 8.7/10kV, 8.7/15kV, 12/20kV, 18/30kV, 21/35kV, 26/35kV.
3.2 The rated temperature for the cable conductor is 90°C.
3.3 The conductor temperature shall not exceed 250℃ during a short circuit (duration of 5 seconds).
3.4 The cable conductor should comply with the requirements of GB/T3956.

3.5 Cable Bend Radius:

3.6 The technical specification for the cable combustion performance grading is B1 level combustion, which primarily evaluates:
Flame spread FS ≤ 1.5m, measured carbonization distance on the surface of bundled cables caused by the determined flame, simulating the extent of cable combustion and spread after a fire occurs.
2. Peak Heat Release Rate (HRR) of 30kW, measured under specified conditions, indicates the amount of heat released by the material per unit of time when burning, reflecting the danger of flame spread along cables and the potential impact of the ignition source on adjacent areas.
3. Total heat release within fire 12005 (THR12005), the integrated value of the heat release rate over the specified time of 12005, and the total heat released within the fire 12005.
4. Index of Combustion Growth Rate (FIGRA) ≤ 150W/5, representing the maximum ratio of the heat release rate to the corresponding time, used for grading combustion performance.
5. Peak Smoking Rate (SPR) Peak ≤ 0.25 m²/5, measures the production of smoke within a unit of time.
6. Total smoke production within the fire 12005 is TSP1200 ≤ 50 m², measure the total smoke production rate within the specified time frame of 12005.
7. Smoke Density (Low Light Transmission) - It260%; Measures low light transmission, reflecting the visibility in the ignition area and the danger posed by smoke to personal safety through the smoke density test.
8. Vertical flame spread H ≤ 425mm; the distance between the starting point and the lower starting point on the carbonized portion of the cable surface as measured by the flame.
9. Includes additional combustion properties:
Combustion Droplets/Particle Grades and Classification Criteria

Smoke Toxicity Level and Classification Criteria

Corrosivity Grade

4. Flame Retardancy Mechanism

B1-rated flame-retardant cables differ from standard flame-retardant cable designs by using inorganic mineral materials such as metal hydrates like Al(OH)3 and Mg(OH)3 instead of traditional polypropylene tear-resistant ropes or glass fiber fillers. These materials are filled with non-toxic, halogen-free, bromine-free, and halogen-free inorganic metal hydroxides between the cable insulation and jacket. Upon exposure to fire, as the cable temperature rises, they decompose into metal oxides and water, reducing the cable surface temperature and hindering the combustion reaction of the jacket material. After combustion, a hard shell composed of Al(OH)3, Mg(OH)3, etc., forms around the cable core, isolating external oxygen from the cable's internal insulation materials and becoming a barrier against thermal oxidation. This results in the B1-rated flame-retardant cables achieving higher flame-retardant and fire-resistant capabilities.

Due to the flame-retardant cable with B1 flame-retardant performance grade, which utilizes flame-retardant material formulations and structural design, it can "cool down" and "insulate" during testing, making the non-metallic capacity of bundled flame-retardant cables no longer a "golden monkey" for designers. Even when conducting flame-retardant tests on cables that far exceed the A-class standard of 14L non-metallic material per meter, the carbonization height can be significantly lower than the national standard of 2.5 meters. Moreover, with the combustion of the cable greatly hindered, the outer sheath has minimal burn-off, and the cable core remains largely uninvolved in combustion due to the protective isolation layer, resulting in very low levels of heat and smoke generation. This allows us to easily pass the stringent GB31247-2014 B1 grade test.

Using B1-rated flame-retardant cables effectively prevents the combustion reaction of flammable materials inside the cable, while significantly reducing the non-metallic content of the sheath material. Compared to traditional flame-retardant cables, using B1-rated flame-retardant cables in areas with dense cable laying in large-scale projects offers better cost-effectiveness and is a new product worth promoting.

Name and Applicable Voltage

Product Name and Applicable Voltage

5.1 Product Model Code and Meaning

5.2 Method of Product Representation