It refers to a cable that can be safely operated for a certain period of time in the case of flame combustion. China's national standard GB12666.6 (such as IEC331) will be divided into two grades of fire resistance test: A, B flame temperature 950~1000 °C, continuous fire time 90min, B flame temperature 750~800 °C, continuous fire time 90 Min, during the whole test period, the sample shall withstand the rated voltage value specified by the product. Fire-resistant cables are widely used in high-rise buildings, underground railways, underground streets, large power stations and important industrial and mining enterprises in places related to fire safety and fire rescue, such as power supply lines and control lines for emergency facilities such as fire fighting equipment and emergency light.

1, AC rated voltage:

U. /U (V series: 600/1000V, K series: 450/750V, B series: 450/750V).

2, the cable's maximum long-term working temperature

(1), olefin insulation and sheath: 70 ° C and 105 ° C; cross-linked polyethylene insulation: 90 ° C;

(2), fluoroplastic insulation and sheath: 220 ° C and 260 ° C; fluoroplastic insulation and 105 ° C flame retardant polyvinyl fluoride sheath: 90 ° C and 125 ° C two.

(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.

3. Minimum ambient temperature:

(1), flame-retardant PVC insulation and sheath: fixed laying -40 ° C; non-fixed laying -15 ° C;

(2), fluoroplastic insulation and sheath: fixed laying -60 ° C; non-fixed laying -20 ° C;

4. The safe laying temperature of the cable should not be lower than 0 °C.

5, fire resistance characteristics:

Comply with IEC331 regulations in accordance with GB12666.6

Flame temperature 750°C Flame temperature 950°C-1000°C Flame temperature 750°C-800°C

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

6, the recommended allowable bending radius:

Non-armored and braided shielded cables shall not be less than 6 times the outer diameter of the cable;

The steel tape armored cable shall not be less than 12 times the outer diameter of the cable;

The fluoroplastic insulation and sheathing cable shall be not less than 8 times the outer diameter of the cable.

NH-KYJV copper core XLPE insulated PVC sheathed fire-resisting control cable

NH-KYJVP copper core XLPE insulated PVC sheathed copper wire braided shield fire-resistant control cable

NH-KYJVP2 copper core XLPE insulated PVC sheathed copper tape shielded control cable

NH-KYJV22 copper core XLPE insulated PVC sheathed steel tape armored fire control cable

NH-KYJVR copper core XLPE insulated PVC sheathed fire-resistant soft control cable

NH-KYJVRP copper core XLPE insulated PVC sheathed copper wire braided shield fire resistant soft control cable

NH-KVV: copper core PVC insulated PVC sheathed fire resistant control cable

NH-KVVP : copper core PVC insulated and sheathed copper wire braided shield fire resistant control cable

NH-KVVP2 : copper core PVC insulated and PVC sheathed copper tape shielded fire-resistant control cable

NH-KVV22: copper core PVC insulated PVC sheathed steel tape armored fire control cable

NH-KVVR: Copper core PVC insulated PVC sheathed soft fire resistant control cable

NH-KVVRP: Cu core PVC insulated PVC sheathed copper wire braided shielded soft fire resistant control cable

Control soft cable KVVR

Shielded control cable KVVP22