HCL series constant wattage heating cable has 3 parallel copper wires with the same cross section as power bus and heating cores, and one end is reliably short-circuited, and the other end is connected to the power source to form a star load. Thus, a continuous, heat-generating electric heating cable is formed. According to the practical requirements, the three phases of the electric heating cable can be separated or integrated into one.

The parallel constant power electric heating belt consists of multiple heating sections connected in parallel over the entire length. The length can be cut according to actual needs. When heating, it must be used in conjunction with a thermostat. The medium can be accurately set to maintain the temperature and realize automatic control. The heat generation per unit length is constant.

The working principle of the HGL high-temperature constant power heating cable is the same as that of the HBL parallel constant power heating cable, and its structure is similar. It can be used in hazardous areas Zone 1 and Zone 2 with explosive gas mixtures in groups T3-T6. The main difference lies in the use of nickel-plated stranded wire for the core, nickel-plated copper wire for the shielding layer, high-temperature fire-resistant glass fiber for the outer sheath of the bus wire, and polytetrafluoroethylene (PFA) for the insulation and jacket layers.

The structure and working principle of the marine constant power heating cable are the same as those of the reinforced parallel constant power heating cable (HBL). In addition to having all the characteristics of the reinforced parallel constant power heating cable, the marine heating cable also offers superior mechanical strength, flame resistance, heat resistance, and anti-mold properties.