© THETA Ingenieurbüro GmbH 2015 Back to overview Thermal Network Library   Manufacturers and users of electrical devices and installations are often faced with the problem of evaluating and improving their products and/or equipment. Regardless of where they are employed, in the generation and transmission of electrical energy, in the production of goods or in individual households, the devices and installations are to be built in a more and more compact and efficient way. The frame size of electrotechnical equipment is determined mainly by the temperature distribution inside the devices and installations. If the companies who manufacture electrotechnical equipment develop a new product, they dimension it also thermally. But if they do not work with the necessary care and competence, the current-carrying capacity of the product will fall back behind the one that could be achieved. Valueable capacities of raw and refined materials are thus not exhausted. Companies who want to excel on the market in offering quality products must, therefore make the exhaustion of material capacities their job. With the help of a thermal calculation model, the critical temperatures within an electrical device can be determined dependently on its geometric measurements, the qualities of the materials used and the loss due to current and environmental influences. Tests are virtually not required. Falling back upon the research done by the Institute of High Voltage and High Current Engineering at Dresden University of Technology, THETA has developed a thermal network library that is based on the thermal network method. The library enables its users to achieve the desired result within a short period of time and without spending extraordinary much money. Thus it relieves the manufacturers and users of electrical devices and installations of the time-and-money-consuming way of experimenting and applying other methods of calculation than the thermal calculation model. The thermal calculation model emulates heat transfer processes analogeously to an electrical network. With its help, a wide range of products standing out due to both a high current-carrying capacity and a compact design has been developed. Among other things, the temperature distributions of very large transformers, distribution transformers in compact stations, high-breaking-capacity fuses and gas-insulated medium-and-high-voltage switchgear at different load currents and under different environmental conditions were simulated.