The heating element of the constant power parallel electric heater is a tightly and uniformly wound heating wire around the busbar insulation. The heating wire is connected to the busbar sequentially at fixed intervals (heating section length), forming a stable parallel circuit along the length of the busbar when voltage is applied.
In constant power parallel heating cables, continuous heating resistive wires form a series of interconnected parallel heating sections – heating sections, each of which is independently separable for trimming according to requirements (except for fire-resistant constant power parallel heating cables).
Constant power parallel electric heating cables cannot be used alone; they must be paired with a explosion-proof temperature controller and explosion-proof accessories that are compatible with the environment.
In areas of Factory Zone 1 and 2 with explosive gas T4 groups, the explosion-proof temperature controller's set temperature should not exceed 110°C. The temperature sensor is mounted on the outer sheath at a high temperature point to ensure the surface temperature of the electric tracing heating does not exceed 130°C.

Constant Power Parallel Heating Cable Structure Diagram
1. Constant Power Parallel Electric Heating Cable Model Description

2. Main Technical Parameters of Constant Power Parallel Electric Heat Tracing
| Model | Single-phase constant power | High Temperature Single-Phase Constant Power | Three-phase Constant Power |
| Project | Parallel electric heating tape | Ratio-connected electric heating tape | Parallel electric heating tape |
| Rated Output Power | 10/15/20/25/30/35/40/45/50/55/60 W/m | ||
| Explosion-Proof Marking | Ex e IIC T4 Gb | ||
| Rated Voltage | 220V | 220V | 380V |
| Dielectric Strength: | ≥2000V/min Non-breakdown | ||
| Insulation Resistance: | ≥50MΩ/hm | ||
| High temperature resistance | 205℃ | 260℃ | 205℃ |
| Low installation temperature: | ≥-40℃ | ||
3. Constant Power Parallel Electric Heating Cable Performance Comparison Table
| Project | Temperature Resistance Grade | Maintain temperature | Utilize length |
| Model | |||
| RDP2-(Q)-J3-10 | 205℃ | ≤150℃ | 195 m |
| RDP2-(Q)-J3-20 | 205℃ | ≤120℃ | 140 m |
| RDP2-(Q)-J3-30 | 205℃ | ≤90℃ | 115 m |
| RDP2-(Q)-J3-40 | 205℃ | ≤65℃ | 90 m |
| RDP2-(Q)-J4-20 | 260℃ | ≤180℃ | 140 m |
| RDP2-(Q)-J4-30 | 260℃ | ≤150℃ | 115 m |
| RDP2-(Q)-J4-40 | 260℃ | ≤120℃ | 90 m |
| RDP3-(Q)-J3-30 | 205℃ | ≤120℃ | 275 m |
| RDP3-(Q)-J3-40 | 205℃ | ≤100℃ | 235 m |
| RDP3-(Q)-J3-50 | 205℃ | ≤80℃ | 210 m |
| RDP3-(Q)-J3-60 | 205℃ | ≤60℃ | 180 m |
4. Applicable Locations:
Constant power parallel electric heating tape is suitable for pipe and equipment frost and condensation prevention in the following situations:
·Safe Zone
· Hazard Zones 1 & 2; Zones 21 & 22;
·Moist and salt spray environments; corrosive conditions.





























