(1)產品工作原理 Working Principle JFC 串聯型電熱帶是一種由芯線作發熱體的電伴熱產品，由于芯線單位長度的電阻和通過的電流均恒定，所以整根電伴熱帶首尾發熱均勻，輸出功率恒定。 Jfc type series connection heating cable is electric heating trace product which core wires act as heater.As the resistance per unit length and the current are constant,the power output of the whole heating cable from beginning to end is meaning and constant. (2)產品規格和主要技術特性 Product Types and Main Technical Characteristics 表 2-3： JFC-口/3型電熱帶主要技術參數表 Table 2-3: Main Technical Parameters of JFC- 口 /3 Heating Cable 型號 Type 額定 電壓 Rated Voltage (v) 額定 功率 Rated Power (w/m) 絕緣 電阻 Insulation Resistance (MΩ /hm) 電氣 強度 Electricity Intensity (v/min) 絕緣層 材料 Insulation Material 產品 高耐溫 Highest Temp- erature (℃) 防爆 標志 Explosion Proof Label 介質 高維持 溫度 Highest Maintenance Temperature of Media (℃) 加強型 Reinforced JFC-6~30/3J 380 (660) 6~30 ≥100 2750 F46 200 ExeIIT4 120 JFC-30~50/3J 30~50 110 JFC-6~30/3J 6~30 ≥100 3500 PFA 260 90 JFC-30-50/3J 30~50 70 ★注： 實際選用時應根據管道長度、散熱量、工作電壓和芯線數，計算芯線截面而定。 Note:When actually applying,choose suitable type cable according to the pipe lenght,heat loss,work voltage,number of core wires.and core wire’s section areas. (3)產品應用場合 Applications 主要適用于長距離和超長距離單一管線的伴熱保溫，一個電源點較大使用長度為幾百米到數千米。 Mainly applying to thermal insulation of single long legnth pipe,The longest use length with one power suppply circuit from hundreds meters to thousands meters.