Electrically drivable glazing

An electrochromic system comprising

• at least one electrochromic glazing including conductive layers;
• an electrical drive circuit connected to the conductive layers of the at least one glazing;
• an electricity generator to supply power to the at least one glazing;
• a control unit equipped with a user interface to provide powering instructions to the electricity generator;
• a counter connected to the control unit for counting time;
• means for measuring and computing physical characteristics of the electrical drive circuit and of the at least one glazing including at least one means for measuring an electrical voltage between two distinct points of the at least one glazing, a means for measuring an electric current and a means for measuring a state of coloration of the at least one glazing;
• wherein the control unit is initialized by initialized data by using operational data characteristics of the at least one glazing and of the electrical drive circuit, including two limits of a predetermined range of state of coloration of the at least one glazing;
• wherein the control unit records a coloration state modification drive command activated with aid of the user interface;
• wherein the control unit initiates a powering instruction dependent upon the initialized data and the measurements of physical characteristics of the electrical drive circuit, including the measurement of the state of coloration of the at least one glazing;
• wherein the control unit follows the coloration state modification of the at least one glazing and, simultaneously, checks at a predetermined frequency compliance with at least one safety criterion determined by the initialized data or the measurement of the at least one physical characteristic of the electrical drive circuit or of the at least one glazing;
• wherein the control unit modifies a powering instruction in an event of non-compliance with the at least one of the safety criterion;
• wherein the control unit stops the powering instruction by an intentional interruption at the user interface or by the at least one glazing reaching a predetermined state of coloration.