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 . <EOS>