JFB-口3型三相恒功率并联电热带
1)产品结构与事情原理
Product Structure and Working Principle
三根平行的绝缘铜线为电源母线， ，，，在内护套绝缘层外纠葛电热丝， ，，，并将该电热丝每隔一定距离划分依次与三根电源母线循环毗连， ，，，在每二相间形成一连并联电阻。。 。当母线通以三相电后， ，，，各并联电阻同时发热， ，，，因而形成一条一连的加热带。。 。
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.
Product Types and Main Technical Characteristics
表 2-2： JFB-口/3型电热带主要手艺参数表
Table 2-2: Main Technical Parameters of JFB- 口 /3 Type Electric heat cable
| 型号Type | 额定 电压Rated Voltage(v) | 额定 功率RatedPower(w/m) | 绝缘 电阻Insulation Resistance(MΩ /hm) | 电气 强度Electricity Intensity(v/min) | 绝缘层 质料Insulation Material | 产品 高 耐温Highest Temp-erature(℃) | 防爆 标记Explo-sionProof Label | 小弯 曲半径Min.BendingRadius(mm) | 介质 高维持 温度HighestMaintenance Temperature of Media(℃) | 单电源 大使 用长度Max.UseLengthof SinglePower(m) |
| 增强型Reinforced | ||||||||||
| JFB-30/3J | 380 | 30 | ≥50 | 2750 | F46 | 200 | ExeIIT4 | 通俗型Common30 增强型Reinforced35 | 120 | 320 |
| JFB-40/3J | 40 | 100 | 240 | |||||||
| JFB-50/3J | 50 | 80 | 190 | |||||||
| JFB-60/3J | 60 | 60 | 160 |
(3)产品特点及应用场合
Product Characteristics and Applications
三相电热带除有单相电热带相同特点外， ，，，尚有以下优点：
Besides the above characteristics the three phase heating cables have following advantages:
①率的三相电热带的大允许使用长度是单相电热带的三倍。。 。
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.
②三相带截面大， ，，，传热导面积大， ，，，能提高传输效率。。 。
Bigger section area of three phase heating cable can broaden heat transmitting area and thisincreases the transmitting efficiency.
三相并联带一样平常适用于大管径， ，，，管网系统管线和罐体的伴热保温。。 。
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