Electric heat tracing according to the process, material, maintenance temperature is different, its model is also different, so when the user is in use, you can see what occasion they are using, choose the corresponding model, if you choose a bad model, you can let the electric heating manufacturer technicians help choose.
Electric heat tracing is classified by area of use
Industrial electric heat tracing: constant power electric heat tracing, self-limiting temperature tracing (depending on the specific occasion environment and temperature requirements, high temperature, medium temperature, low temperature, etc. so temporarily placed in industrial electric heat tracing), MI heating cable, heat tracing sampling composite tube, skin collection heat tracing system, etc.;
Civil electric heat tracing: solar power heat tracing, electric floor heating (heating cable, heating mat, aluminum foil mat, etc.);
Special electric heat trace: silicone rubber electric heat trace, fire special electric heat trace.
How electric heat tracing works
Need to see which model of electric heat trace you are using, here is mainly the working principle of self-limiting temperature tracing and constant power electric heat tracing:
Self-limiting temperature tracing working principle: PTC thermistors are used to convert electrical energy into thermal energy, and the working principle of positive temperature coefficient makes this electric heat trace self-adjust the power with temperature changes. From the appearance, it can be seen that the real technology PTC of self-limiting temperature electric heat tracing is a black conductive plastic layer between parallel busbars, and the two busbars only play a conductive role. Such characteristics determine that the self-limiting temperature electric cable installation can be overlapped and crossed, and will not burn the wires and cables due to excessive temperature.
Self-limiting temperature heat tracing
Series constant power electric tracing working principle: is an electric heating product made of core wire heating element, that is, through the current on the core wire with a certain resistance, the core wire emits Joule heat, due to the resistance of the unit length of the core wire and the current passed. The entire length is equal, the heat generation everywhere is equal, will not be like parallel electric heating with the increase of the length of use to cause low power at the tail, so it is mainly suitable for long-distance pipeline heat tracing, with a power point.
Series constant power electric heat trace
Working principle of parallel constant power electric heat tracing: the power bus bar is two parallel insulated copper wires, which are wound on the inner insulation layer, and the heating wire is connected with the bus bar every certain distance (that is, the "heating section length") to form a continuous parallel resistance, and after the bus bar is energized, each parallel resistance heats up, thus forming a continuous heating cable.
