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technical article
Witness the quality of fire-resistant cables and fluoroplastic insulation
2012-1-4 9:56:57

最高长期工作温度 1.Maximum long-term working temperature of refractory cable

(1) Polyolefin insulation and sheath: 70 ° C and 105 ° C; XLPE insulation: 90 ° C;

和护套:220℃和260℃两种;氟塑料绝缘和105℃阻燃聚氟乙烯护套:90℃和125℃两种。 (2) Fluoroplastic insulation and sheath: 220 ° C and 260 ° C; Fluoroplastic insulation and 105 ° C flame retardant PVC sheath: 90 ° C and 125 ° C.

(3) Low-halogen, low-smoke flame-retardant PVC insulation and sheath: 70 ° C; Halogen-free, low-smoke flame-retardant polyolefin insulation and sheath: 90 ° C and 125 ° C.


敷设推荐的允许弯曲半径:非铠装、编织屏蔽电缆应不小于电缆外径的6倍; 2. Recommended permissible bending radius for refractory cable laying: non-armored, braided shielded cable should not be less than 6 times the outer diameter of the cable;

Steel tape armored cable should not be less than 12 times the outer diameter of the cable;

和护套材料电缆应不小于电缆外径的8倍。 Fluoroplastic insulation and sheath material cables should not be less than 8 times the cable outer diameter.

交流额定电压:U。 3. AC rated voltage of refractory cable : U. / U (V series: 600 / 1000V, K series: 450 / 750V, B series: 450 / 750V).


3. Minimum ambient temperature of refractory cable:

(1) Flame-retardant PVC insulation and sheath: fixed laying -40 ℃; non-fixed laying -15 ℃;

(2) Fluoroplastic insulation and sheath: fixed laying -60 ℃; non-fixed laying -20 ℃;


耐火特性: 4. Fire resistance characteristics of fire resistant cable :

Meets IEC331 and GB12666.6

Flame temperature 750 ℃ flame temperature 950 ℃ -1000 ℃ flame temperature 750 ℃ -800 ℃

Burning time 3h Burning time 90min Burning time 90min

Cooling time 21h additional voltage rated voltage additional voltage rated voltage

Additional voltage Rated voltage Additional current 3A Additional current 3A

Additional current 3A Class A Class B


5. The safe laying temperature of refractory cable should not be lower than 0 ℃