Èý¸ùƽÐеľøԵͭÏßΪµçԴĸÏß£¬ÔÚÄÚ»¤Ì×¾øÔµ²ã±í²øÈƵçÈÈË¿£¬²¢½«¸ÃµçÈÈ˿ÿ¸ô¿Ï¶¨¾à°Ý±ðÀë˳´ÎÓëÈý¸ùµçԴĸÏßÑ­»·ÏνÓ£¬ÔÚÿ¶þÏà¼äÐγɽÐø²¢Áªµç×è
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¡£Three parallel insulation copper wires form power generatrix. Electric heating threads are wound around the inner jacket insulation layer ln every certain distance, the heating thread is welded in turn to the three power generatrix circularly. This makes every 2 phases into acontinuous parallel connection resistance. When the generatrix is connected to 3 -phase power supply, the every parallel resistance heats at the same time This makes a continuous heating belt.

(2)²úÆ·¹æ¸ñºÍÖØÒª¼¼Êõ¸öÐÔProduct Types and Main Technical Characteristics

±í 2-2£º JFB-¿Ú/3Ð͵çÈÈ´øÖØÒª¼¼Êõ²ÎÊý±íTable 2-2: Main Technical Parameters of JFB- ¿Ú /3 Type Electric heat cableÐͺÅType¶î¶¨µçѹRated Voltage(v)¶î¶¨¹¦ÂÊRatedPower(w/m)¾øÔµµç×èInsulation Resistance(M¦¸ /hm)µçÆøÇ¿¶ÈElectricity Intensity(v/min)¾øÔµ²ã×ÊÁÏInsulation Material²úÆ·ºÜ¸ßÄÍÎÂHighest Temp-erature(¡æ)·À±¬±êÖ¾Explo-sion Proof LabelºÜÓ×ÍäÇú°ë¾¶Min.BendingRadius(mm)½éÖʺܸßά³ÖζÈHighestMaintenance Temperature of Media(¡æ)µ¥µçÔ´ºÜ´óʹÓó¤¶ÈMax. UseLengthof SinglePower(m)¼ÓÇ¿ÐÍReinforcedJFB-30/3J38030¡Ý502750F46200ExeIIT4ͨ³£ÐÍCommon30¼ÓÇ¿ÐÍReinforced35120320JFB-40/3J40100240JFB-50/3J5080190JFB-60/3J6060160(3)²úÆ·Ìص㼰ÀûÓó¡ËùProduct Characteristics and Applications

ÈýÏàµçÈÈ´ø³ýÓе¥ÏàµçÈÈ´øÒ»ÑùÌصã±í£¬»¹ÓÐÒÔÏÂÀûÒ棺Besides the above characteristics the three phase heating cables have following advantages:¢ÙÂʵÄÈýÏàµçÈÈ´øµÄºÜ´óÔÊÐíʹÓó¤¶ÈÊǵ¥ÏàµçÈÈ´øµÄÈý±¶
¡£The most tolerable length of the three-phase heat cable is three times longer than the length of the single-phase heating cable of the same wattage.¢ÚÈýÏà´ø½ØÃæ´ó£¬´«Èȵ¼Ãæ»ý´ó£¬ÄÜÌá¸ß´«ÊäЧÄÜ
¡£Bigger section area of three phase heating cable can broaden heat transmitting area and thisincreases the transmitting efficiency.ÈýÏಢÁª´øͨ³£ºÏÓÃÓÚ´ó¹Ü¾¶£¬¹ÜÍøϵͳ¹ÜÏߺ͹ÞÌåµÄ°éÈȱ£ÎÂ
¡£Three phase parallel connection heating cables are suitable forthethermal insulation of pipes with big diameters, pipe lines in nets and tanks.

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