FIELD: electricity.
SUBSTANCE: invention pertains to electrical engineering and can be used for drives and in high voltage electrical machine building. In alternating-current valve inverter braking resistance has several separate braking resistors (18) which form part of bipolar submodules (14) respectively; at that in case of in-series connection of submodules (14) they are connected in series and contain at least energy accumulator (16) connected in parallel to a matched braking resistor (18) and controlled high-power semiconductor (28) for braking which in braking position allows passage of current through respective separate braking resistor (18), and in position of normal operation mode it stops passage of current through it.
EFFECT: improving reliability due to exclusion of complete failure of the installation using valve inverter.
13 cl, 12 dwg
