According to the composition of polymer PTC material, the thermal cable of self-limiting temperature tracing belt can be divided into low temperature type and high temperature type. Common in the market is polyolefin as the base material of 65℃ temperature grade thermal cable and fluorine materials as the base material of 110℃ and 150℃ thermal cable. The cable can be used stably for long periods of time and produce effective heating power output at z.UI high ambient temperatures beyond specified temperature levels. On the one hand, due to the increase in resistance, the output power of the cable itself is very small, and the actual heating efficiency is very low. Long-term overtemperature use can reduce or weaken cable performance, such as PTC characteristics and heating power, which will reduce cable service life and operational reliability. However, it is also possible to be intermittently exposed to above-temperature environments and other poles for short periods of time. Therefore, in addition to the above temperature levels, the automatic temperature tracking cable has another temperature level. For example, for the temperature grade 65℃ cable, the temperature grade is 85℃, for the temperature grade 110℃, 130℃ cable, and for the temperature grade 150℃, 230℃ cable. However, the cable is valid at this time.
Self-limiting temperature high temperature tracing belt composition structure
(1) Copper bus :19*0.32.
(2) Heating core: flame retardant PTC,
(3) Insulation layer: perfluorinated material. Fluoride PTC.
(4) Shielding layer: tinned soft round copper wire braided layer.
(5) Sheath: fluorinated polyolefin and perfluorinated materials.
Performance index of self-limiting high temperature tracing belt
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.uli low: - 30℃
Thermal stability: After 300 cycles from 10℃ to 149℃, the calorific value of the cable remains at 90%
Bending radius :25.4 mm; 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 with a 2500 VDC electric shaker for 1 minute. Z.uli small insulation resistance (between conductor and shield) is 3000 meters
Operating voltage :220 V 380 V
Output power at 10 ° c :40W/m 45W/m 50W/m 60W/m
Explosion-proof mark :Exe ii T4
