Arc fault protected electric converter system

A wind turbine comprising a rotor blade system, an electric generator connected to be driven by the rotor blade system, a tower with a nacelle for housing the electric generator, and

• an electric converter module comprising:
• a first section comprising a top part, a bottom part and four side walls arranged between the top and bottom parts forming a first enclosure, wherein the four side walls are arranged to withstand a pressure of an arc flash inside the first enclosure, wherein a first electric conductor arranged for electric grid connection penetrates a first side wall of the first section, and wherein a second electric conductor penetrates a second side wall opposite the first side wall by means of a sealing mechanism of the second side wall, and wherein the first enclosure houses at least one electric protective device electrically connected between the first electric conductor and the second electric conductor;
• and
• a second section arranged adjacent to the second side wall of the first section, wherein the second section forms a second enclosure housing an electric converter system connected at one end to the second electric conductor and at the opposite end to a third electric conductor and being arranged to convert electric power from the third electric conductor to electric power to the second electric conductor, wherein the second section has at least one door serving to allow service personnel to access components of the electric converter system from outside the enclosure,
• wherein the electric converter system is connected to convert electric power from the electric generator and to apply converted electric power to an electric grid via the first electric conductor,
• wherein the first enclosure houses at least one electric protective device connected between the first electric conductor and an auxiliary conductor accessible outside the first enclosure;
• and
• auxiliary equipment necessary for operation of the wind turbine in a de-energized state of the electric converter system, wherein at least a part of said auxiliary equipment is arranged for electric grid connection to the auxiliary electric conductor when the wind turbine is in the de-energized state.