After preliminary analysis
The furnaces hold two parallel lines of resistances, one in the low part of the furnaces and another in the upper part.
Through the picture aside, we can observe one of the mentioned prototypes in the Fonderie 2A facilities, with the energy supply by a WPT system and controlled by a control cabinet.
The WPT maintains the temperature of the load in the holding operation at 680 ºC, while waiting for feeding the HPDC cycle. Therefore there is no need of a overheat up to 750ºC of the aluminum, reducing the consumption of energy and increasing the quality of the aluminum.