According to the different heating methods and power, we divide the electric heating cable into: self-limiting temperature electric heating cable and constant power electric heating cable, so what is a self-limiting temperature electric heating cable? Today, I will give you a brief introduction to the self-limiting temperature heating cable.
Self-limiting temperature electric heating cable, as the name implies, is an electric heating cable that can automatically control the heating temperature. Why? Because the heating material of the self-limiting temperature tracing cable is PTC polymer conductive plastic, this conductive material expands when the temperature rises, so that part of the current channel network is gradually disconnected, the energization current is reduced, and the calorific value is also reduced. At the same time, when the temperature decreases, the PTC heating core belt shrinks, the current channel is reconnected, and the current increases and the heat generation increases. Automatically adjust the temperature of the electric heating cable through the PTC material.
At the same time, according to different heat tracing temperatures, we divide the self-limiting temperature tracing cables into low temperature self-limiting temperature electric tracing cables, medium temperature self-limiting temperature electric tracing cables, and high temperature self-limiting temperature electric tracing cables. The maximum working temperature of the low temperature self-limiting heating cable is 65±5℃, and the maximum temperature resistance is 85℃; the maximum working temperature of the medium temperature self-limiting electric heating cable is 105±5℃, and the maximum environmental exposure temperature is 135℃, which is brown; the high temperature self-limiting temperature The maximum working temperature of the electric heating cable is 130±5℃, and the maximum working environment temperature is 150℃, which is red.
According to the different structure and material of the electric heating cable, the self-limiting temperature heating cable can be divided into flame-retardant electric heating cable, ordinary electric heating cable and fluorine material anti-corrosion heating cable according to different outer sheath materials. , shielded electric heating cable and explosion-proof electric heating cable with metal shielding layer