What is self-limiting high temperature tracking zone?

According to the composition of polymer PTC material, the thermal cable of self-limiting temperature tracing zone can be divided into low temperature type and high temperature type. In the market, the thermal cables of 65℃ temperature grade with polyolefin as the base material and the thermal cables of 110℃ and 150℃ with fluorine material as the base material are common. The cable can be used stably for a long time and produce effective heating power output. The high ambient temperature exceeds the specified temperature level. On the one hand, due to increased resistance, the output power of the cable itself is very small, and the actual heating efficiency is very low. Long-term overtemperature use will reduce or weaken cable performance, such as PTC characteristics and heating power, which will reduce the service life and operation reliability of the cable. However, it is also possible to be intermittently exposed to overheated temperature environments and other poles for short periods of time. Therefore, in addition to the above temperature level, the automatic temperature tracking cable has another temperature level. For example, for a cable with a temperature rating of 65 ° C, the temperature rating is 85 ° C, for a cable with a temperature rating of 110 ° C and 130 ° C, and for a cable with a temperature rating of 150 ° C and 230 ° C. However, the cable is valid at this time.

Self-limiting high temperature trace zone composition

(1) Copper bus :19*0.32.

(2) Heating core: flame retardant PTC,

(3) Insulation layer: perfluorinated material. Fluorinated PTC.

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

(5) Sheath layer: fluorinated polyolefin and perfluorinated materials.

Self-limiting high temperature tracking performance index

Standard color: Red

Temperature range: z.u I high maintenance temperature 155 ℃ | z.u I high a surface temperature of 155 ℃ + 5 ℃, z.u I high bearing temperature 205 ℃

Construction temperature :z.u Low: -30 ℃

Thermal stability: After 300 cycles from 10℃ to 149℃, the calorific value of the cable is maintained at 90%

Bending radius: 25.4mm; Room temperature 20℃; 35.0 mm at -30℃

Insulation resistance: When the cable length is 100 meters and the ambient temperature is 75℃, shake it for 1 minute with 2500 volts DC shaker. z.u small insulation resistance (between conductor and shield) is 3000 m

Operating voltage :220 V 380 V

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

Explosion proof mark :ExeⅱT4