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三相恒功率电热带和单相恒功率电热带的原理基本相同，不同之处是单相采用单相供电，三相带采用三相三角型供电，三相带除有单相电热带的特点外，特别适用于长距离、大管径管道的伴热和保温，可用于工厂一区、二区的爆炸性气体混合物T3组场合。
The feature of three phase cable is similar to that of single phase cable. The difference is that supply of the power is single-phase or three-phase. Three-phase heating cable owns the characteristic of single-phase heating cable, meanwhile It is specially applied in heating and temperature-maintenance for long-distance and big-diameter pipe. It is suitable to be used in ordinary and hazlo c areas.
■三根平行的绝缘铜芯线为电源母线，在内护套绝缘层外缠绕电热丝，并将该电热丝每隔一定距离（即“发热节长”）分别依次与电源母线AB-BC-AC-AB……反复循环连接，在每二相间型成连续并联电阻。当母线通以三相电后，各并联电阻同时发热，而型成一条连续三相供电的加热带。
The tree parallel bus wries supply voitage a long the entire length of the heating cabe.A resistance wire heating element is spirally wraped around inner insulation contacting alternate bus wire(AB-BC-AC-AB……)at specific intervals forming heating zone.
■产品规格及主要技术特性Performance and rating data
产品型号Catalong number | 额定功率Power(W/m) | 最大使用长度 Max length(m) | 流体介质的最高维持温度 Max fluid temp | 发热节长 Heating section length | |
普通型 | 加强型 | ||||
FDP3-J3-10 | FDP3(Q)-J3-10 | 30 | 330 | 120 | 1520 |
FDP3-J3-20 | FDP3(Q)-J3-20 | 40 | 280 | 100 | 1320 |
FDP3-J3-30 | FDP3(Q)-J3-30 | 50 | 275 | 80 | 1180 |
FDP3-J3-40 | FDP3(Q)-J3-40 | 60 | 250 | 60 | 1070 |
注：最高维持温度：是指管道内介质需要维持的最高工艺温度，一般不宜超过本表规定值。
Note: max fluid temperature: max fluid flowing temp in pipe not allowed to be exceeded
额定电压：Rated Voltage:380V
常态绝缘电阻Normal insulation resistance:≥20MΩ
介电强度Dielectric test:～2000V50Hz/1min
绝缘层材料Insulation material:F46氟塑料
最高耐温Maximum withstand temperature:205
防爆标志：Explosion-proof marks: Ex II T4
防护等级：Type of protection: IP56
防爆合格证证号：Explosion-proof Certificate of inspection: CJEx10.108U
■产品特点Production characteristic
FDP3-J3型三相电热带除具有和FDP2型单相电热带相同的特点以外，还有以下优点：
1.三相电热带的最大允许使用长度高于单相电热带。
2.在大规模应用电热带的场合，能均衡电网负载。
3.三相电热带由于采用三根芯线，使电热带更趋遍平，降低了表面发热负符，增加对管道的热传导面积，提高了电热带的热传输效率及最高维持温度。
Compared to single-phase heating cable (FDP2), three-phase heating cable (FDP3) has the characteristics FDP2 has, it also has below advantages:
a. The max allowed length of three-phase heating cable is greater than that of single-phase heating cable.
b. It helps to relieve the electricity load in large-scale heating cable applicable net.
c. Due to three bus wires are in the FDP3, The heating cable is more flat and increase transfer heat areas and energy efficiency. Strengthen range is that ordinary rang add a oversheath and high strength mechanical and corrosive-proof feature.
| 类型 | 电伴热带 | 品牌 | 三相恒功率电热带 |
| 型号 | FDP3-J3 | 常温电阻 | 20（Ω） |
| 表面温度 | 120（℃） | 最大电压 | 380（V） |
| 功率 | 10.20.30.40（W） | 主要用途 | 管道伴热，防冻和保温 |
| 产品认证 | 生产许可证 |
