JFB · D/3 type Three-phase Constant Wattage Parallel Connection Electric Heating Cable
1.
Product Structure and Working Principle
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.Product Types and Main Technical Characteristics
Table 2-2: Main Technical Parameters of JFB- 口 /3 Type Electric heat cable
Type
Rated Voltage
(v)
Rated
Power
(w/m)
Insulation Resistance
(MΩ /hm)
Electricity Intensity
(v/min)
Insulation Material
Highest Temp-
erature
(℃)
Explo-
sion
Proof Label
Min.
Bending
Radius
(mm)
Highest
Maintenance Temperature of Media
(℃)
Max.
UseLength
of Single
Power
(m)
Reinforced
JFB-30/3J
380
30
≥50
2750
F46
200
ExeIIT4
Common
30
Reinforced
35
120
320
JFB-40/3J
40
100
240
JFB-50/3J
50
80
190
JFB-60/3J
60
60
160
3.Product Characteristics and Applications
Besides the above characteristics the three phase heating cables have following advantages:
①The 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.
②Bigger section area of three phase heating cable can broaden heat transmitting area and thisincreases the transmitting efficiency.
③Three phase parallel connection heating cables are suitable forthethermal insulation of pipes with big diameters, pipe lines in nets and tanks.
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