Large electrical household appliances are used in private households as well as in the commercial environment. Typical examples are refrigerators, cookers, dishwashers, washing machines, automatic dryers and tumble dryers. Electrical functions of large appliances include, for example, electromotive drives of laundry drums or refrigeration compressors, electromagnetic valves of water circuits, and electric heaters for heating, cooking and cooking. The operation of large household appliances is subject to official energy efficiency criteria. Large household appliances, also referred to as white goods, are to be distinguished in the linguistic use of brown goods (entertainment devices), red goods (heaters) and gray goods (communication electronics).