A converter arrangement, comprising: a first chopper circuit configured to connect a positive input or a neutral point with a positive output, wherein the first chopper circuit comprises a first switch arrangement, a first inductor and a first capacity, wherein the first switch arrangement is configured to connect the first inductor with the positive input or with the neutral point, the first inductor configured to interconnect the first switch arrangement with the positive output and the first capacity configured to interconnect the positive output with the neutral point; a second chopper circuit configured to connect a negative input or the neutral point with a negative output, wherein the second chopper circuit comprises a second switch arrangement, a second inductor and a second capacity, wherein the second switch arrangement is configured to connect the second inductor with the negative input or with the neutral point, the second inductor configured to interconnect the second switch arrangement with the negative output and the second capacity configured to interconnect the negative output with the neutral point; characterized by a first auxiliary device and a second auxiliary device connected between the positive output and the negative output, wherein a midpoint between the first auxiliary device and the second auxiliary device and the neutral point are separated; an overvoltage protection device configured to short-circuit the positive output, the midpoint and the negative output, when an overvoltage is measured between the positive output and/or the negative output and the midpoint; wherein the overvoltage protection device comprises a first semiconductor switch connecting the positive output and the midpoint between the first auxiliary device and the second auxiliary device and a second semiconductor switch connecting the midpoint with the negative output. a first chopper circuit configured to connect a positive input or a neutral point with a positive output, wherein the first chopper circuit comprises a first switch arrangement, a first inductor and a first capacity, wherein the first switch arrangement is configured to connect the first inductor with the positive input or with the neutral point, the first inductor configured to interconnect the first switch arrangement with the positive output and the first capacity configured to interconnect the positive output with the neutral point; a second chopper circuit configured to connect a negative input or the neutral point with a negative output, wherein the second chopper circuit comprises a second switch arrangement, a second inductor and a second capacity, wherein the second switch arrangement is configured to connect the second inductor with the negative input or with the neutral point, the second inductor configured to interconnect the second switch arrangement with the negative output and the second capacity configured to interconnect the negative output with the neutral point; characterized by a first auxiliary device and a second auxiliary device connected between the positive output and the negative output, wherein a midpoint between the first auxiliary device and the second auxiliary device and the neutral point are separated; an overvoltage protection device configured to short-circuit the positive output, the midpoint and the negative output, when an overvoltage is measured between the positive output and/or the negative output and the midpoint; wherein the overvoltage protection device comprises a first semiconductor switch connecting the positive output and the midpoint between the first auxiliary device and the second auxiliary device and a second semiconductor switch connecting the midpoint with the negative output.