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High temperature fire resistant cables

Features and uses： For AC rated voltage 300/500V and below, high-temperature environment on signal detection. In particular, fire and security systems for the control and power protection circuit transmission line Use of property： Operating temperature: long-term use of 200 ℃ Short-term use 1000 ℃ 90 minutes Rated voltage Uo / U: 300/500V Minimum ambient temperature: fixed installation -60 ℃ fixed laying -20 ℃ Minimum bending radius: non-armored cable is not less than 10 times the cable diameter Armored cable is not less than 12 times the cable diameter The main technical indicators： Performance of projects Units Technical indicators Conductor DC obstruction Ω/km Section mm2 0.5 0.75 1.0 1.5 2.5 Resistance 36.0 24.5 18.1 12.1 7.41 Test voltage kv/1min 1.5 Insulation resistance MΩ.km 100 Fire-resistant properties of energy 　 A (flame temperature 1000 ℃ for 90 minutes test constantly 3A fuse） Model and name Model Name NHFF Copper fire insulation layer high temperature fire cable NHFF22 Copper fire insulation layer steel armored cable high temperature fire NHFF32 Copper fire insulation layer steel wire armored cable high temperature fire NHFP1F High temperature fire insulation layer copper fire shielding cable NHFP1F22 Copper fire insulation layer heat shield fire armored steel cable NHFP1F32 Fire insulation layer copper, steel wire armored cable heat shield fire 说明 In addition to producing high temperature fire of the cable unit, but also the production of ordinary fire-resistant cable rated voltage 300/450, writing simply type F to V, such as NHVV, NHVV22