An arrangement for the exposure of a pumpable medium to an electric field. The arrangement comprises, at least two power supplies (100) for the generation of electrical voltage, at least one non-conducting chamber (102) for pumping said pumpable medium, which said at least one chamber (102) is provided with a first (106) and a second electrode plate (108), a control means (104) for controlling said at least two power supplies (100). During control the control means (104), by synchronous control, establishes a series connection between at least two of said at least two power supplies (100), the first electrode plate (106) and the second electrode plate (108). A resulting composite voltage arises between the first (106) and the second electrode plate (108), which resulting composite voltage will result in an electric field between the first (106) and the second electrode plate (108). The pumpable medium is exposed to the electric field. A method for the exposure of a pumpable medium to an electric field is also provided.