The NH-VV series fire-resistant power cables are suitable for use in high-rise buildings, oil fields, power stations, power plants, mines, chemical plants, mine shafts, subways, and other locations requiring high fire protection requirements. They are also essential cables for emergency power supplies, fire pumps, and elevator communication and signaling systems. These cables offer high fire resistance. Even under direct flame, they remain protected from short circuits and short circuits for a specified period of time, ensuring continued power supply for lighting and signal transmission, allowing personnel sufficient time to safely evacuate, and facilitating fire extinguishing and minimizing losses.
I. Production Implementation Standards
Company standards are used.
II. Operating Conditions
1. AC Rated Voltage (U0/U): 0.6/1kV
2. Maximum Long-Term Operating Temperature
① Flame-retardant PVC insulation and sheath: 105°C; XLPE insulation: 90°C
② Fluoroplastic insulation and sheath: 200°C and 260°C; Fluoroplastic insulation and 105°C flame-retardant PVC sheath: 90°C and 125°C. ③ 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: -40°C for fixed installation; -15°C for non-fixed installation.
② Fluoroplastic insulation and sheath: -60°C for fixed installation; -20°C for non-fixed installation.
4. The cable installation temperature should be no less than 0°C.
