Definitions of flame retardant cable technology
Chinese Name: flame retardant cable English name: flame retardant cable definition: in the cable sheath is flame retardant only a limited distance and can be self-extinguishing power cable. Applied science: power transmission lines (two subjects) or more (one subject); content published by the National Science and Technology Approval Committee
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Flame retardant cable flame retardant cable under the specified test conditions, the specimen was burning, after the test fire source is removed, the flame spread only within limits, the residual flame or residue burning in a limited time to self-extinguishing cable . The fundamental characteristics are: in case of fire may be burned out and can not run, but can prevent the spread of fire. More simply, the wire in case of fire, to burning restrictions in the local area, does not produce the spread, keep a variety of other devices, to avoid greater losses.

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An overview of the flame retardant cable
Flame-retardant cable using the features
Introduction and Application of the common flame retardant cable model
Flame retardant cable of the main technical indicators
Differences and selection of flame-retardant cables and fire resistant cables
Other cable
Wire and cable industry development overview
Edit this paragraph flame retardant cable Overview
Meaning: flame-retardant in the specified test conditions, the sample is burned in the fire source is removed, the spread of flame on the sample only a limited range of self-extinguishing characteristics, namely, to prevent or delay the occurrence or spread of flame capacity. Flame retardant cable www.lfszh.com
The burning of wire and cable cable due to external heating to produce a flammable gas, to achieve the purpose of fire-retardant, must contain three elements cause a fire, namely: the combustible gas, heat and oxygen. Therefore, the flame-retardant wire and cable commonly used in insulation, sheathing and fill material, add a halogen-containing halide and metal oxides, from the point of view of the flame retardant to evaluate, this is an excellent method, but Because these materials contain halide, when burned, release a lot of smoke and halogenated hydrogen, so the low visibility fire evacuation and fire, a great hindrance to the safety of personnel, and others more for the toxic gas suffocation. In addition, halogenated hydrogen and air in the water after the reaction, that is generated hydrogen halide acid, severe corrosion of equipment, buildings, resulting in "secondary disasters". Now, with the continuous improvement of the technological level, fire-retardant issues from the past of halogen flame retardant, has been further developed to a low-halogen, halogen-free flame retardant. Lee Technology Group Co., Ltd. in the development and production of communication power with fire retardant flexible cables "on the cable insulation, the jacket uses a halogen, high decomposition temperature, good mechanical properties of halogen-free polymer material, due to cable free of halides and metal oxides in the combustion does not produce harmful gases and smoke, does not exist will cause the possibility of "secondary disasters", and also has good mechanical properties and electrical performance to meet the cable use, and completely changed the inadequacies of the flame retardant cable.
Edit this paragraph, flame retardant cable properties
Using the characteristics of PVC insulated
Rated voltage 0.6 / 1
Maximum conductor temperature of 140 ℃
Short-circuit temperature ≤ 180 ℃ (the longest 5s)
The ambient temperature ≥ 0 ° C (below 0 ° C to the need to preheat)
Laying permissible bending radius not less than 15 times the cable outside diameter (single-core cable)
Not less than 10 times the cable outer diameter (multi-core cable)
Flame retardant properties to meet with GB12666.5 A or B (IEC332-3)

Edit the introduction and use of this segment of the common flame-retardant cable model shows
Copper core?? Aluminum Core? The name uses?
? ZA-YJV/ZB-YJV/ZC-YJV? ZA-YJLV/ZB-YJLV/ZC-YJLV? XLPE insulated PVC sheathed (B, C) flame retardant power cable? Can be laid in the flame retardant requirements indoor, tunnels and pipelines.
? ZA-YJV22/ZB-YJV22/ZC-YJV22? ZA-YJLV22/ZB-YJLV22/ZC-YJLV22? XLPE insulated steel tape armored PVC sheathed (B, and C) flame retardant power cable ? suitable for burying the flame retardant requirements not suitable for the laying of the pipeline.
? ZA-VV/ZB-VV/ZC-VV? ZA-VLV/ZB-VLV/ZC-VLV? PVC insulated and sheathed A (B, C) class of flame-retardant power cable? Can be laid on there are fire-retardant requirements of indoor, tunnels and pipelines.
? ZA-VV22/ZB-VV22/ZC-VV22? ZA-VLV22/ZB-VLV22/ZC-VLV22? PVC insulated steel tape armored PVC sheathed (B, C) flame retardant power cable? suitable for burying the flame retardant requirements, appropriate to the pipe laying.
? WDZA-YJY/WDZB-YJY/WDZC-YJY? WDZA-YJLY/WDZB-YJLY/WDZC-YJLY? Cross-linked polyethylene insulation jacket polyolefin A (B, and C) flame retardant power cable? Can be laid on flame retardant and low smoke halogen requirements indoor, tunnels and pipelines.
? WDZA-YJY23/WDZB-YJY23/WDZC-YJY23? WDZA-YJLY23/WDZB-YJLY23/WDZC-YJLY23? XLPE insulated steel tape armored polyolefin sheath (B, and C) flame retardant power cable? suitable for burying requirements for flame retardant and low smoke halogen, not suitable for the laying of the pipeline.

Edit this paragraph retardant cable main technical indicators
A. Finished cable conductor (R class) DC resistance (in accordance with the the GB3956 provisions) 2. Frequency voltage test: The exchange 50HZ3.5KV/5min breakdown IEC flammability rating in order to evaluate the flame retardant performance advantages and disadvantages of the cable, the International Electrotechnical Commission formulated the IEC60332-1, IEC60332-2 and IEC60332-3 three criteria. IEC60332-1 and IEC60332-2 were used to assess single cable flame retardant ability tilt and vertical placement (domestic corresponding GB12666.3 and GB12666.4 standard). IEC60332-3 (domestic corresponding with GB12666.5-90, with GB12666.5 has been of GB / T 18380.3-2001 substitute) used to assess the bundles of cable vertical burning flame retardant ability, compared to the bunched cable vertical burning much higher when the flame-retardant capability requirements. The ◎ IEC60332-1/BS4066-1 retardant grades (single wire or cable vertical burning test Flame, the Test On Single Vertical the Insulated Wires / Cables) This is a single cable flammability standards. Testing regulations, a 60cm long specimen vertical opening in the anterior wall of the metal box, propane burner flame length 175mm contact angle of 45 degrees from the flame cone and the cable from the sample of the upper fixed side 450mm position, If the sample combustion damaged part from the fixed end and the lower part of not more than 50mm test. Flame retardant cable
The ◎ IEC60332-3/BS4066-3 retardant rating (bunched wires or cable vertical burning test Flame Test On BunchedWires / Cables) is bunched cables flame retardant standards. Testing regulations, into a beam of 3.5m long cable specimen with wire fixed in the trapezoidal test rack, and the decision of the number of samples required different classifications of non-metallic materials. Sample perpendicular to hang back wall in the combustion furnace, air is introduced through the inlet on the floor of the combustion furnace. Case of propane flat burner flame in contact with the sample of 750 ° C, the specimen in the mandatory hair (air emissions 5m3 / min, wind speed of 0.9m / s) must be in the vertical burning 20 minutes of internal combustion is not up, cable flame spread 2.5 m or less self-extinguishing. IEC60332 Class A, Class B, Class C and Class D points to assess the pros and cons of the flame retardant properties. UL flammability standard UL listed in any cable has been tested and verify if they meet certain fire rating, the cable printed on the UL identifier, fire rating and approval number. ◎ booster-CMP class (air combustion test / Tolstoy sodium duct experiments Plenum Flame Test / Steiner TunnelTest) This is the most demanding cable (Plenum-Cable) UL fire safety standards applicable safety standards UL910, experimental regulations the device level air duct laying multiple samples 87.9KW gas burner (300,000 BTU / Hr) burning for 20 minutes. The eligibility criteria for the flame can not be extended to five feet away from the gas burner flame front. The peak of the optical density of 0.5, the average density value 0.15. CMP cable is usually installed in the ventilation ducts or air handling equipment used in air reflux pressurization system, Canada and the United States recognized adopt. Meet the UL910 standard FEP / the PLENUM materials, flame-retardant properties than comply with IEC60332-1 and IEC60332-3 standard, low smoke zero halogen flame retardant performance, burning up the low concentration of smoke. ◎ Route class-CMR-level (vertical burning test slide the riser Flame, Test) This is the UL standard, commercial-grade cable (slide the riser Cable), the applicable safety standards UL1666. Experimental regulations laying of multiple samples in a simulated vertical axis, with the provisions of the 154.5KW gas burner (527,500 BTU / Hr) 30 minutes. The eligibility criteria for the flame can not spread to the upper 12 feet high room. Riser cable not smoke concentration standard, generally used for floors vertical and horizontal cabling. ◎ Commercial Grade-CM level (vertical burning test Vertial Tray Flame Test) This is a commercial grade cable UL Standards (General Purpose Cable), the applicable safety standards & UL1581. Experiment provides the vertical 8 feet high stand, the laying of a number of samples, with 20KW strip torch burning for 20 minutes (70,000 BTU / Hr). The eligibility criteria for the flame can not spread to the cable upper end and self-extinguishing. Similar to UL1581 and IEC60332-3C, but the number of cable laying root. Commercial-grade cable smoke concentration standard, generally applies only to the horizontal alignment of the same floor, and should not be used for vertical wiring on the floor. The ◎ generic level-of CMG (vertical burning test Vertial Tray Flame Test) This is a common grade cable UL Standards (General Purpose Cable), applicable safety standards & UL1581. Commercial grade and general level of the test conditions are similar to the same use for the recognition of Canada and the United States. General Purpose Cable smoke concentration standard, generally applies only to the same floor level alignment should not be used for vertical wiring on the floor. ◎ household level - the CMX-level (vertical burning test Vertial Wire Flame Test) This is the household level in the UL standard cable (the Restricted Cable), the applicable safety standards & UL1581 VW-1. Experimental sample perpendicular to the provisions of test used a blowtorch burning (30,000 TU / Hr) 15 seconds, then stop for 15 seconds, repeated 5 times. The eligibility criteria for the I flame should not exceed 60 seconds, the specimen can not burn more than 25%, surgical cotton pad at the bottom can not be ignited by falling objects. & UL1581-VW-1 and IEC60332-1 is similar, but the burning time. This level there is no smoke or toxic specifications, only for laying a single cable in the home or small office systems. This type of cable should not be a bundle of the laying of use, must casing. Smoke density and halogen content and toxicity levels
Edit this paragraph, the difference of the flame-retardant cable and fire resistant cables and selection
Most people can easily confuse the concept of flame-retardant and fire resistant cables, flame retardant cable has many more advantages for chemical companies, such as low halogen, flame retardant, but under normal circumstances, fire-resistant cable can replace the flame-retardant cable , flame retardant cable can not replace the fire-resistant cable. Their main difference is: a principle difference between fire-resistant cable and flame retardant cable principle. Retardant principle of a cable containing halogens by halogen flame-retardant effect, the principle of halogen-free cable is flame retardant by precipitation of water to lower the temperature to extinguish the fire roasting. Fire-resistant cable is to rely on the fire resistance of the refractory layer mica materials, heat-resistant characteristics, to ensure that the cable fire is working properly. The difference between structure and material structures and materials of the fire-resistant cable and flame retardant cable is not the same. The flame-retardant cable junction tree is: (1) of the insulation sheath and outer sheath of the flame retardant material (2) use of fire-retardant materials; (3) package with a fill using the flame-retardant materials. The fire-resistant cable is usually coupled with a fire-resistant layer between the conductor and the insulation layer, so the theory can be coupled with fire-resistant layer in the structure of flame-retardant cable, the formation of both fire-resistant cables flame retardant cross, but the actual and it is not necessary. Resistant layer of fire-resistant cable is usually multi-layer mica tape wrapped directly on the wire. It can withstand a long period of burning, even if imposed by the flame at the polymer is burned, to ensure the normal operation of the line.
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