(1)產品結構 Product Structure JPB 型并聯高溫帶分單相帶和三相帶兩類，其結構分別與JFB型并聯式單相帶和三相帶相似，所不同的是芯線采用鍍鎳鉸線，編織層采用鍍鎳銅絲，絕緣層和護套層均采用四氟乙烯-一全氟烷基乙烯醚共聚物（簡稱 PFA）擠塑而成，能在260℃溫度下長期使用。 JPB type parallel connection high-temperature electric heating cable has two types:single phase and three phase.Theirs are made of nickel-plated stranded copper wires and the braided layers are made of nickel plated copper threads.And moreover the insulation and jacket layers are extruded by PFA.which can be used up to 260℃. (2)產品工作原理、特點和適用場所 Working Principle, Characteristics and Applications JPB型并聯高溫帶工作原理與JFB型并聯電熱帶相同，它能維持190℃以下介質管道的伴熱保溫，它特別適用于瀝青、重油、渣油和高粘油管線的伴熱保溫，也適用于需260℃以下蒸汽掃線管道路的保溫。 The working principle of JPB parallel connection high temperature cable is the same as JFB parallel connection electric heating cable. It can maintenance media temperature in pipes below 190℃.It is especially suitable to the thermal insulation of bitumen,heavy oil.residual oil and high-visconsity oils pipelines.It is also applicable to thermal insulation of steam cleaning pipes under 260℃. (3)產品主要技術特性 Main Technical Parameters: 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 較高 耐溫 Highest Temp- erature (℃) 防爆 標志 Explo- sion Proof Label 介質 高維持 溫度 Highest Maintenance Temperature of Media (℃) 單電源 較大使 用長度 Max. UseLength of Single Power (m) 普通型 Common 加強型 Reinforced JPB-20/2 JPB-20/2J 單相 Single Phase 220 (380) 20 ≥50 2000 PFA 260 ExeIIT3 180 160 (280) JPB-30/2 JPB-30/2J 30 180 110 (190) JPB-40/2 JPB-40/2J 40 170 80 (140) JPB-50/2 JPB-50/2J 50 160 60 (100) JPB-30/3 JPB-30/3J 三相 Three Phase 380 30 ≥50 2500 PAF 260 ExeIIT3 190 320 JPB-40/3 JPB-40/3J 40 180 240 JPB-50/3 JPB-50/3J 50 170 190 JPB-60/3 JPB-60/3J 60 160 160 ★注： 額定電壓為380V的非標單相高溫帶，型號表示為：“JPB-口/2（380V）”，其 主要技術參數除“單電源較大使用長度”為同規格單相帶的“”倍外，其余 均與同規格的單相帶相同。 Note:The non-standard tsingle phase type high temperature cable of rated voltage 380Vis marked by ¨JPB-口/2(380V)¨.The main technical parameters are the same as those ofsingle- phase cable in same wattage, except that the maximal use length is times longer than single phase cable.