The principle and characteristics of self-limiting temperature and medium temperature heat tracing

Electropolymer and two parallel metal wires and insulating sheath. Its characteristics are that the conductive polymer has a high positive temperature number "PTC" characteristic, and it is connected in parallel with each other. It can automatically adjust the output power with the temperature change of the heated system, automatically limit the heating temperature, and can be arbitrarily shortened or within a certain range. Extended use.

The composition and structure of self-limiting and medium-temperature tracing cables

(1) Copper busbar: 7*0.42, 7*0.50, 19*0.32.

(2) Heating core: normal positive temperature coefficient, flame retardant positive temperature coefficient,

(3) Insulation layer: modified polyolefin, flame retardant polyolefin, fluorine-containing polyolefin and perfluorinated material. Fluorinated PTC.

(4) Shield layer: tinned soft round copper wire braid.

(5) Sheath layer: modified polyolefin, flame retardant polyolefin, fluorine-containing polyolefin and perfluorinated material.

Technical indicators of self-limiting temperature and medium temperature heating cable

Standard color: orange, brown

Temperature range: z.ui high maintenance temperature is 105℃ | z.ui high surface temperature is 105℃±5℃, z.ui high bearing temperature is 135℃

Construction temperature: z.ui low: -30℃

Thermal stability: After 300 cycles from 10°C to 149°C, the calorific value of the cable remains at 90%

Bending radius: 25.4mm; room temperature 20°C; -30°C low temperature 35.0mm

Insulation resistance: When the cable length is 100 meters and the ambient temperature is 75°C, shake it with a 2500V DC electric shaker for 1 minute. z.ui small insulation resistance (between conductor and shield) is 3000 meters

Working voltage: 12V 24V 36V 110V 220V 380V

Output power at 10°C: 25W/m 35W/m 40W/m 45W/m 50W/m 60W/m

Explosion-proof marking: ExeⅡT4