The heating element of the constant power parallel electric heating tape is a tightly and uniformly coiled heating wire wrapped 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 after 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 operable and can be cut to size as required (except for fire-retardant constant power parallel heating cables).
Constant power parallel heating cables cannot be used alone; they must be paired with a suitable explosion-proof temperature controller and accessories that match the environment.
In areas of Factory Zone 1 and Zone 2 with explosive gas T4, the explosion-proof temperature controller is set not to 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 does not exceed 130°C.

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

2. Key Technical Parameters of Constant Power Parallel Electric Heating Tape
| Model | Single-phase constant power | High-temperature Single-Phase Constant Power | Three-phase Constant Power |
| Project | Parallel electric heating tape | Thermal Cable for Parallel Connection | Parallel electric heating tape |
| Rated Output Power | 10/15/20/25/30/35/40/45/50/55/60 W/m | ||
| Flameproof Mark | 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 heating cables are suitable for pipeline and equipment frost and condensation prevention in the following situations:
· Safe Zone;
· Hazardous Area 1, 2; Zones 21, 22;
·Humid, salt fog environments; corrosive conditions.





























