Series Resistance Heating Cables
Series Resistance Heating Cables
In Series Resistance Heating Cables, the energy-carrying part and the heat-generating part are the same and are chrome-nickel wire. These cables can be produced in different resistances. The resistance of these cables is directly proportional to their length and the specific resistance can be cut at certain meters according to the desired power value.
There is a minimum length limitation that can be used to prevent excessive rise in current values to pass through. There are two types of series resistance cables, single conductor and double conductor. Single conductor cables are produced in such a way that phase connection is made at one end and neutral connection is made at the other end. In double conductor series resistive cables, phase and neutral connections are made from one end to provide ease of connection.
The appropriate resistance must be chosen depending on the length and power to be used. Depending on the required power, temperature values and outdoor conditions; The insulation material used varies from PVC to PTFE and glass fiber for moisture-free places.
These cables can be used up to 260 ° C and 450oC. Metal sheathed and mineral insulated ones can go up to 1000 ° C.
Usage areas of Serial resistance cables
Such cables are used for heat monitoring of long lines, floor heating applications in the indoor environment, snow and icing prevention applications outside (ramps, winter gardens, doors, stairs), pure heating applications in mosques, roof-gutter ice prevention systems, tanks and pipelines. They are widely used in heat tracing applications.
In general applications, the heat loss is made by the engineers and the cable power is selected. Powers such as 20w-30w are used in the selection of heat calculations. Cable selection should be made according to external isolation environment conditions, chemical resistance and temperature group. In order not to damage the cable in the event of an explosion or an impact, the insulation must be selected correctly. Since the heater cable has certain resistance values, it can be a certain length for the desired power value and cannot be lengthened or shortened. Generally, mineral insulated series resistant cables are used in high temperature lines. Stainless steel and Alloy 825 are the materials of choice for high temperature process control and are ideal for freeze protection or viscosity control applications exposed to periodic high temperature.
PDF: SNT-L_Heating_cable
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