FDP3 three-phase constant watt heating cable provides frozen-prevention and temperature-maintenance of pipelines and valves which is same for FDP2 single-phase constant watt heating cable. FDP3型三相恒功率电热带与FDP2型单相恒功率电热带一样,能用于解决管道和阀门等的防冻和保温。
However, when applied to long-distance and big-diameter pipes, using of three-phase heating cable is more economic and reasonable and showing more advantage. 但是,当在长距离、大口径管道进行伴热保温时,采用三相带比单相带更经济、更合理、更能显示使用三相带的优越型。
Calculation of real fault location of three-phase cable 三相电缆真故障点的计算
Instead of the time consuming numerical computation, a simplified calculation of the maximum field strength is presented for the purpose of dimensioning the three-phase gas insulated cable. 为确定三相充气管道电缆的尺寸,本文提出利用最大场强的简化计算方法来取代繁复的数值计算。
Main equipments of the cryogenic system include a liquid nitrogen gas-liquid separator, a centrifugal pump, a sub-cooler, the three-phase HTS cable cryostats, a heat exchanger in the sub-cooler and a vacuum pump for pumping the liquid nitrogen, etc. 冷却系统主要包括气液分离器、低温液氮泵、减压过冷容器、换热器、HTS电缆管路,以及减压抽空系统等。