Overvoltage limiter of type TOP-3

The thyristor overvoltage limiter of type TOP-3 is designed for installation in DC substation circuits – parallel to the cathode choking coil and limits overvoltages on the choking coil and rectifier output and arc energy generated in the high speed breaker (HSB) arc chute (triggered by switching processes). The limiter is adapted for operation with six- and twelve-pulse rectifiers