Select the high temperature products need to consider what factors
The cable industry point of view, the market a large number of manufacturers producing high temperature line, in order to choose the right high temperature line products, in addition to pay attention to wire and cable models, specifications (conductor cross section) of the choice, what are the selection skills?
Long-term allowable current capacity of the cable is when the cable through the current, after reaching thermal stability, the temperature of the cable conductor just reaches the long-term allowable working temperature when the current value. The current capacity depends on the maximum allowable working temperature of the product, and at the same time has a great relationship with the working system (such as long-term continuous load, variable load and intermittent load operation), and the laying of wires and cables, environmental conditions, The so-called carrying capacity that long-term continuous operation under the allowable operating current, in other cases, the corresponding conversion.
Wires and cables used for power and lighting circuits are not required for current carrying capacity. For applications requiring special applications such as high voltage ignition wires for vehicles and compensation wires for instrumentation systems. Cable manufacturers only provide cable cross-section data, does not provide the cable rated current data, is correct. Because the rated current of the cable is related to the environment, the working continuity of the load, the allowable working temperature of the cable insulation, the allowable voltage drop of the cable and other parameters, the cable designer should choose the appropriate cable cross-section after fully considering by the purchaser's electrical designer.
In addition, Silver Tin also found that many people's economic section of wire and cable has so far been misunderstood that in the case of temperature does not exceed the standard minimum section of the cable is the economic section, which is wrong point of view, because he ignored the cable Economic loss caused by its own energy consumption. Under the same load, the larger the cable cross-section is, the smaller the current density of the cable is and the smaller the energy consumption of the cable is. Therefore, the purchaser should take the current density into account when selecting the hot wire product.