What is a self-limiting high temperature trace cable?

According to the composition of the polymer PTC material, the heating cable of the self-limiting temperature heating cable is divided into low temperature type and high temperature type. Commonly on the market are thermal cables with a temperature level of 65°C based on polyolefin and thermal cables with a temperature of 110°C and 150°C based on fluorine materials. The z.ui high ambient temperature at which the cable can be used stably for a long time and produce effective heating power output exceeds the specified temperature level. On the one hand, due to the increased resistance, the output power of the cable itself is very small, and the actual heating efficiency is very low. Long-term over-temperature use will reduce or impair cable performance, such as PTC characteristics and heating power, which will reduce cable life and operational reliability. However, intermittent exposure to excessive temperatures and other extremes for short periods of time is also possible. Therefore, the automatic temperature tracking cable has another temperature level in addition to the above temperature level. For example, for a cable with a temperature rating of 65°C, a temperature rating of 85°C, for a cable with a temperature rating of 110°C, 130°C, and for a cable with a temperature rating of 150°C, 230°C. However, the cable works at this point.

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

(1) Copper busbar: 19*0.32.

(2) Heating core: flame retardant PTC,

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

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

(5) Sheath layer: fluorine-containing polyolefin and perfluorinated material.

Performance index of self-limiting high temperature tracing cable

Standard color: red

Temperature range: z.ui high maintenance temperature 155℃ | z.ui high surface temperature 155℃+5℃, z.ui high bearing temperature 205℃

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: 220 volts 380 volts

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

Explosion-proof mark: Exe II T4